Millwood Dam, which impounds Millwood Lake on the Little River, was constructed between 1961 and 1966 at a cost of $46.1 million as part of a U.S. Army Corps of Engineers (USACE) project to control flooding on the lower Red River, into which the Little River empties near the town of Fulton (Hempstead County). The lake created by the dam spills across the borders of four counties—Sevier, Little River, Howard, and Hempstead—and provides a variety of recreational opportunities for southwestern Arkansas. The 3.3-mile-long, earthen Millwood Dam is the longest of its kind in Arkansas. Millwood Dam, located east of Ashdown (Little River County), was made possible by the federal Flood Control Act of 1946, though opposition within the state and …
Hugh Dinsmore Miser was a geologist who spent much of his career with the United States Geological Survey (USGS). Over the course of his career, he produced geologic maps of large parts of many states and oversaw investigations of mineral deposits critical to the national World War II efforts. Hugh Miser was born in Pea Ridge (Benton County) on December 18, 1884. He was the third child of Jordan Stanford Miser, a farmer, and Eliza Caroline Webb. Miser’s ancestors were immigrants of German and English descent who moved from Tennessee to northern Arkansas in the early part of the nineteenth century. Miser attended the Pea Ridge Normal School, an academy organized by Benjamin Harvey Caldwell. He entered the University of …
In 1976, the Department of Energy and the Solar Energy Research Institute were allotted funds for a Total Energy Solar Photovoltaic Conversion System that would be the largest of its kind in the world. The location chosen for the project was Mississippi County Community College (MCCC), now Arkansas Northeastern College (ANC), in Blytheville (Mississippi County). The project design included the installation of solar panels, as well as additional funding for the college facility. The main purpose of the project was to build an energy-efficient structure and harness solar power from the panels in order to coordinate, monitor, and manage energy production. With the United States facing an energy crisis in the mid-1970s, President Jimmy Carter created a comprehensive energy plan …
Mites are small arthropods (Phylum Arthropoda) belonging to the Class Arachnida (Subclass Acari) with two or three Superorders as follows: Acariformes (or Actinotrichida), Parasitiformes (or Anactinotrichida), and Opilioacariformes. There are four Orders, Mesostigmata, Prostigmata, Orbatida, and Astigmata. Among the more well-known mites are ticks (Ixodida). There are an estimated 48,200 species of described mites. The phylogeny of the Acari is still debatable, and several different taxonomic schemes have been proposed for their classification. The diversity of the Acari is extraordinary, and its fossil history goes back to at least the early Devonian Period (about 419 million years ago). Mites are very common in Arkansas, with chiggers being a particular pest of humans during warmer months. Historically, references to mites/chiggers go …
The mammalian family Talpidae includes seventeen genera and forty-two species of moles worldwide in the order Eulipotyphla. Of these, there are four genera and seven species in North America alone. Moles are found in most parts of North America, Asia, and Europe. The family contains all the true moles, and some of their close relatives—including desmans, but these are not normally called “moles” and belong to the subfamily Talpinae. Those species called “shrew moles” denote an intermediate form between the moles and their shrew ancestors. There are three subfamilies of moles, including the Scalopinae (New World moles) with five genera, Talpinae (Old World, desmans, and shrew moles) with nine genera, and Uropsilinae (Asian shrew-like moles) with a single genus. The …
aka: Mollusks
The phylum Mollusca is a major invertebrate group known commonly as “molluscs” (sometimes spelled “mollusks”), which includes about 85,000 living species (although this number varies), with another 60,000 to 100,000 additional fossil species. This phylum is ranked second only to the Phylum Arthropoda in number of living species. Included within the diverse phylum are snails, slugs, cowries, squids, clams, mussels, limpets, oysters, scallops, octopi, cuttlefish, and a myriad of additional groups such as the little-known chitons, monoplacophorans, and tusk shells. Malacology is the scientific study of molluscs, and a specialist who studies them is known as a malacologist. Two classes of molluscs inhabit Arkansas: the Gastropoda and the Bivalvia. Approximately eighty-five species of bivalves are known from the state, while …
The class Monogenoidea is a fairly large group of parasitic flatworms belonging to the phylum Platyhelminthes. Monogeneans are generally found on bony fishes in freshwater and marine habitats. Although some are endoparasites in the urinary bladder and eyes, most monogeneans are ectoparasites that attach to their host’s skin or gills by a special posteriorly positioned attachment organ called a haptor. The class contains about nine orders, fifty families, and 4,000–5,000 species. The genus Dactylogyrus is one of the largest genera, with nearly 1,000 species. Some taxonomists divide the Monogenoidea into two or three subclasses based on the complexity of their haptor. Those in the subclass Monopisthocotylea have one main part to the haptor, often with hooks or a large attachment …
Raye Jean Jordan Montague was an internationally registered professional engineer (RPE) with the U.S. Navy who is credited with the first computer-generated rough draft of a U.S. naval ship. The U.S. Navy’s first female program manager of ships (PMS-309), Information Systems Improvement Program, she held a civilian equivalent rank of captain. She was inducted into the Arkansas Black Hall of Fame in 2013 and the Arkansas Women’s Hall of Fame in 2018. In 2017, with the movie Hidden Figures having awakened an awareness of the previously unacknowledged contributions of black engineers and mathematicians in the American defense and space industries, Montague was featured on the television show Good Morning America and dubbed a “real-life hidden figure.” Raye Jordan was born on …
During the United States Bicentennial Celebration in 1976, sapling trees that had been grown from germinated seeds that had orbited the moon during the Apollo 14 mission were planted across the nation. Four of those saplings, commonly known as moon trees, were planted in Arkansas. In January 1971, Apollo 14, one of six NASA missions to land on the moon, was launched. During each mission, the astronaut were each allowed to carry a small amount of personal belongings, which could include items such as books, condiments, and holiday decorations. Among the possessions of Astronaut Stuart Roosa was a small metal canister about the size of a soft-drink can containing several hundred tree seeds. Roosa, pilot of Apollo 14 command module …
James Norman (Jim) Moore bred a number of fruit species to be more easily grown in Arkansas. One of the world’s leading authorities on small fruits and a well-regarded professor at the University of Arkansas (UA) in Fayetteville (Washington County), he co-wrote the field-changing Advances in Fruit Breeding (1975) and formed the University of Arkansas Division of Agriculture Fruit Breeding Program, which became the most productive in the world of horticultural science. Jim Moore was born on June 10, 1931, in Plumerville (Conway County) and grew up in Vilonia (Faulkner County). Moore earned a BSA in 1956 and an MS in 1957 from the University of Arkansas. He married Jan Moore before they moved to New Jersey in 1957 for …
Cotton breeder Carl Avriette Moosberg demonstrated that advances in the early maturing of cotton were possible. His Rex variety, introduced in 1957, reduced expense for pesticide by shortening the time required to maturity, while offering disease resistance and strong fiber. The success of Rex encouraged all major cottonseed companies to develop earlier maturing cotton varieties. Moosberg’s research improved the economics of growing cotton in Arkansas in the mid 1900s. Carl Moosberg was born on August 24, 1905, in Tyler, Texas, the third of four sons born to Frank Olaf Moosberg and Anna Trofast, immigrants from Sweden. He graduated from high school in Wills Point, Texas, in 1923 and went to work for the United States Department of Agriculture (USDA) in …
John William Morris was a long-time physician in Woodruff County who practiced medicine until the age of 101. Beginning in 1950, the Arkansas Medical Association (AMA) recognized Morris as the oldest practicing physician in Arkansas. In 1973, the AMA and “Ripley’s Believe It or Not” recognized him as the oldest full-time practicing physician in the United States. J. W. Morris was born on February 6, 1875 at Honey Hill (White County) to George Louis and Sarah Seawell Morris. He had ten siblings. Morris began his practice near McCrory (Woodruff County) on April 21, 1900. He married Amma Gray Burkett on December 19, 1901, and they had two children. Morris estimated that he delivered more than 7,000 babies during his career. …
aka: Gray Mullets
Fishes commonly known as mullets, of the Family Mugilidae and Order Mugiliformes, are a group of more than seventy mostly marine species within some fifteen to twenty-five genera. The genus Mugil is cosmopolitan in distribution except in upper latitudes, and at least five species occur in North America. The latest evidence suggests that mullets are most closely related to atherinomorph fishes (silversides and topminnows). Although most mullets are strictly marine, the striped mullet (Mugil cephalus) has the physiological ability to travel between freshwater and salt water, spending much of its life in streams. It is a cosmopolitan resident of estuaries, temperate and tropical oceans, salt marshes, and shoreline areas along the Atlantic Coast of Nova Scotia south to Mexico and Brazil. …
aka: Opossum Shrimps
Mysida is an order of small, shrimp-like crustaceans in the Class Malacostraca and Superorder Peracarida, with two families, Mysidae (nine subfamilies) and Petalopthalmidae (two subfamilies); 178 genera; and 1,132 species. Most are marine species, but there are about 72 freshwater species, being predominantly found in the Palearctic and Neotropical biogeographical realms. The first report of a species of mysid shrimp documented in Arkansas was in 2012. Species within the order are found throughout the world across a broad range of habitats, such as subterranean, freshwater, and brackish. They can also be found in shallow coastal waters and in surface to deep-sea habitats. In marine waters, they can be benthic (living on the seabed) or pelagic (living in mid-water), but they …
Myxozoans are a group of microscopic, oligocellular, obligate endoparasites that belong to the Phylum Cnidaria, which also includes sea anemones, box jellies, corals, true jellies, sea pens, and hydrozoans. There are two parasitic classes, the Malacosporea and Myxosporea, and more than 2,200 nominal species of myxozoans classified into sixty-four genera and seventeen families. Myxozoans were, for years, placed within their own phylum (Myxozoa). Similarities to cnidarians had been noted at various times but not firmly until 2007. Although morphological and genetic evidence support placement of the Myxozoa as cnidarians, and this taxonomy has been followed by some authorities, others have not reached the same conclusion; exactly where the Myxozoa fit in this taxonomic scheme is not yet entirely known. Less …
aka: Lake Greeson
Narrows Dam is located six miles north of Murfreesboro (Pike County). Authorized by the Flood Control Act of 1941, it was constructed on the Little Missouri River as a project for flood control and hydroelectric power. The Little Missouri River flows through the Ouachita Mountains and enters Pike County at its northwest upper corner, dropping 1,035 feet before it runs into Lake Greeson. Before the dam was constructed, heavy rains in the mountains often caused the area around Murfreesboro to become flooded, causing damage to houses and resulting in loss of livestock and farm crops. Martin White Greeson, the owner of the Murfreesboro-Nashville Southwest Railroad, urged the development of the watershed in order to control the water of the Little …
The Nashville sauropod trackway, which may be the largest dinosaur trackway in the world, was located near Nashville (Howard County). The most unusual thing about the Nashville trackway is its size, but it also represented, for over twenty-five years, the only evidence of sauropods in Arkansas other than bone fragments found nearby. This discovery has greatly informed the scientific study of sauropods and other dinosaur trackways. A trackway is a path of preserved footprints left by dinosaurs. There are between 5,000 and 10,000 assorted tracks on the Nashville trackway, most of which have been identified as having been made by sauropods. Some species of sauropods are the diplodocus and the titansaur. Sauropods had long necks and long tails and walked on all …
The earliest natural gas find is reported to have been in Scott County in 1887 during an effort to develop a commercial water well. The second recorded gas well was drilled two years later (also in Scott County) by an oil driller, Harry Kelly, to a depth of 1,600 feet. This was recognized as the first recorded effort to find oil in Arkansas, though “only gas was present.” No other efforts to find oil or gas were reported until 1901–1902, when the Mansfield Pool was developed by Choctaw Oil and Gas Company. While no oil was found, this effort did provide large amounts of gas, with some wells producing as much as 5 million cubic feet of gas per day. …
Margarete Ethel Neel became the symbol of the International Red Cross after World War II. The White County chapter submitted to the national headquarters a wartime photo of Neel guiding the wheelchair of wounded Private Gordon Pyle of California. It was reproduced as a poster for the organization’s post-war fundraising activities. A plaque commemorating Neel’s Red Cross service stands in front of the Searcy American Legion Hut, where the White County chapter of the Red Cross is located. The chapter was dedicated to Neel just after her death in 1971. Neel was among the first women listed on the rolls of the U.S. Women’s Memorial when it was dedicated in Washington DC in 1997. Margarete Neel was born on December …
aka: Roundworms
The phylum Nematoda includes three classes (Anoplea, Chromodorea, and Rhabditida), sixteen to twenty orders, and about 27,000 described species (and possibly up to one million) of mostly dioecious, elongate, bilaterally symmetrical pseudocoelomate worms. They can be found in abundance in nearly every habitat on Earth, with a diverse array of species existing in both marine and terrestrial habitats. Most are free-living, with less than half considered to be parasitic. Nevertheless, many species threaten the health of plants and animals (including humans) on a global scale. Nematodes are variable in size from less than one millimeter to more than one meter in length. They have been in existence for an estimated one billion years, having evolved from simple animals some 400 …
aka: Horsehair Worms
Horsehair worms belong to the phylum Nematomorpha and are typically obligate parasites of terrestrial arthropods (e.g., beetles, crickets, cockroaches, locusts, grasshoppers, and mantids). As adults, however, they are free-living in aquatic environments. These worms are sometimes found in coiled clusters termed “Gordian knots” from the intricate legendary knot of Greek mythology. Another myth is related to the common name given these worms, “hairworms” or “horsehair worms,” originating from the idea that horse hairs that fell into water became worms. This belief was not disproved scientifically until American anatomist and paleontologist Joseph Leidy (1823–1891) noted in 1870 that horse hairs placed in water for many months did not come to life. The first published report of a horsehair worm from Arkansas …
aka: Ribbon Worms
The phylum Nemertea is an invertebrate phylum that contains over 1,000 species within 250 genera of mostly marine organisms known variously as ribbon, proboscis, or nemertean worms. Only a few taxa inhabit freshwater, and there are several terrestrial species. Most are free living; however, a few are known to be parasitic. The name means one of “Nereis” (unerring one), which refers to the unerring aim of the proboscis. Ribbon worms are unique in having an eversible muscular proboscis that is used for grasping prey. It lies free inside of a cavity above the alimentary canal known as the rhynchocoel. This muscular tube can be swiftly thrust out to catch prey items. This phylum is also occasionally called the Rhynchocoela, which …
aka: Net-Winged Insects
Neuropterans belong to the Phylum Arthropoda, Class Insecta, and Order Neuroptera. The Neuroptera (antlions, lacewings, mantidflies, and their relatives) and allied orders Megaloptera (dobsonflies, alderflies) and Raphidioptera (snakeflies) together make up the clade Neuropterida. There are three suborders (Osmyloidea, Hemerobiiformia, and Myrmeleontiformia) and nine extinct and fifteen extant families. There are about 6,400 species in the group worldwide, with about 450 found in the United States and Canada. Neuropterans can be found on all continents except Antarctica. There are several types of neuropterans in Arkansas. In the fossil record, neuropterans first appeared during end of the Permian period (251 million years ago), which ended in the largest mass extinction the Earth ever experienced, as shown by fossils of the Permithonidae …
Nimrod Dam in western Perry County is the oldest project of the U.S. Army Corps of Engineers in the state of Arkansas, created to control flooding along the Fourche La Fave River. Nimrod Lake, the reservoir created by the dam, stretches across the border of Perry and Yell counties and is a popular attraction for fishermen and duck hunters. The dam and lake take their names from the nearby community of Nimrod (Perry County), itself named after the biblical figure. The construction of Nimrod Dam was authorized by the Flood Control Act of 1938. Damming the Fourche La Fave was considered an economical means of protecting communities and valuable crop land in Yell and Perry counties, as well as lessening …
Joe Nix is a water chemist, environmentalist, naturalist, and educator considered by many to be the watchdog of Arkansas rivers and lakes with respect to water quality and usage patterns. His mission has been to have society use good scientific data in making decisions about environmental matters. Joe Franklin Nix was born on August 28, 1939, the only child of Frank and Era Nix, in Malvern (Hot Spring County). His father was a mechanic; his mother was a homemaker. He was a sickly child, so the doctor advised that he spend a lot of time outdoors. As a youth, he fell under the personal tutelage of family friend and former state geologist Joe Kimzey of Magnet Cove (Hot Spring County). …
Built on the North Fork River, just upstream from its confluence with the White River in Baxter County in north-central Arkansas, Norfork Dam and Lake are named after the nearby town of Norfork (Baxter County). The dam was authorized by Congress in the Flood Control Act of 1938, and construction began in the spring of 1941, making it one of the oldest U.S. Army Corps of Engineers’ multi-purpose concrete structures. The reservoir extends north from the dam site to near Tecumseh, Missouri, and covers portions of Baxter and Fulton counties in Arkansas and Ozark County in Missouri. The drainage area controlled by the reservoir is about 1,806 square miles. The project also contains a powerhouse that houses the generators and …
aka: Channa argus
The northern snakehead (Channa argus) is a modern bony fish belonging to the family Channidae. It is native to China, eastern Russia, and parts of the Korean peninsula. The fish was discovered in Arkansas in 2008, leading to attempts to eradicate it. The northern snakehead has an elongate body, with long dorsal and anal fins, and a truncated tail. Coloration is dark tan to brown with darker spots laterally, extending above and below the midline. The jaws have sharp, pointed teeth. The fish can reach a size of one meter and weigh as much as eight kilograms. The northern snakehead breathes with gills but also possesses a suprabranchial organ, which consists of chambers filled with folded tissue that allow atmospheric …
Novaculite is a hard, dense, white-to-grayish-black sedimentary rock, composed of microcrystalline quartz. It is translucent on its thin, sharp edges and usually breaks with a smooth conchoidal (shell-like) fracture. The word “novaculite” is derived from a Latin word meaning “razor stone.” Novaculite is found in the Ouachita Mountains in formations that are highly resistant to erosion. These formations range from about 250 to 900 feet in thickness. There are two categories of Arkansas novaculite classified by the abrasives industry. The “Washita” stone has the dull luster of unglazed porcelain. It is more porous and less dense than the “Arkansas” stone, which is extremely fine-grained with a waxy luster. There has been recent interest in the fine-grained novaculite as a lapidary …
Thomas Nuttall, a preeminent and far-ranging field naturalist, participated in the early scientific exploration of Arkansas and is remembered both for identifying a number of the state’s plants and for his description of early Arkansas life. His notes on people living in the territory—both Native Americans and American settlers—have provided valuable information for historians and researchers ever since they were first published in 1821. Thomas Nuttall was born to James Nuttall and Margaret Hardacre Nuttall on January 5, 1786, in Long Preston, Yorkshire, England. He was the oldest of three siblings; he had two sisters, Susan (Susannah) and Elizabeth. He never married and had no children. After attending the village school, Nuttall worked as a journeyman printer for his uncle …
Obesity is a complex issue impacting every segment of the population and having many roots. The drivers and health effects of obesity are not fully understood but may be contextualized within the United States’ transition from a farm-based to an industrialized economy. Arkansas consistently ranks as one of the most obese states in the United States. Historically, most efforts to combat obesity have focused on individual-level interventions. Arkansas Act 1220 of 2003, which created the Child Health Advisory Committee, was among the first and most comprehensive statewide legislative initiatives to combat childhood obesity by focusing on creating healthier public school environments. Similar initiatives have proliferated since obesity has become a global health issue. Although widely discussed as a major risk …
aka: Dragonflies
Odonates belong to the Phylum Arthropoda, Subclass Pterygota (winged insects), Class Insecta, and Order Odonata. The famous entomologist Johan Christian Fabricius (1745‒1808), who was the first to provide the name Odonata, apparently used that name because they have “teeth” on their mandibles. Odonates are considered a wide-ranging, primitive order of carnivorous aquatic insects. About 102 species have been documented in Arkansas. One of the two extant suborders of the Odonata (the order to which dragonflies and damselflies belong) is the Epiprocta. This new classification was proposed relatively recently to accommodate the inclusion of the suborder Anisozygoptera. The latter taxon has been shown not to be a natural suborder but somewhat of a paraphyletic collection of lineages, so it has been …
aka: Arkansas Dinosaur
In August 1972, Joe B. Friday discovered the remains of the right hind foot of a dinosaur in a shallow pit on his land in Lockesburg (Sevier County). He found the bones in rocks belonging to the Lower Cretaceous Trinity Group, which consists of deposits of clay, sand, gravel, limestone, and the evaporite minerals gypsum and celestite. Friday donated the bones to the University of Arkansas (UA) in Fayetteville (Washington County), where they are kept in the University Museum Collections at the Arkansas Archeological Survey. UA professor James Harrison Quinn gave the bones the informal name “Arkansaurus fridayi” in 1973. He cleaned and assembled the bones and compared them to the feet of two similar-appearing dinosaurs previously described in the …
Mahlon Dickerson (M. D.) Ogden was a physician who cofounded Trinity Hospital of Little Rock (Pulaski County) in 1923. At Trinity, he pioneered the use of the health maintenance organization (HMO)—a form of health insurance in which member physicians provide medical care to subscribers for a fixed fee—in Arkansas. Born on December 5, 1881, in Little Rock, M. D. Ogden was the only son of railroad clerk Charles Cullen Ogden and his wife, Altamira Deason Ogden. An older cousin, Fred R. Bryson, was adopted into the family and became Ogden’s legal brother. Educated in the local schools, Ogden graduated from the Arkansas Medical School (now the University of Arkansas for Medical Sciences) in 1904. From 1905 to 1916, he taught …
Opalinids are a small group of peculiar cosmopolitan organisms that belong to the kingdom Protista. Recent classification places the opalinids as heterotrophic stramenopiles (heterokonts) within the phylum Placidozoa, class Opalinea, and order Slopalinida. There are over 200 species, and, although opalinids are typically endocommensals (that is, living within the host without affecting it) in the large intestine and cloaca of anurans (frogs and toads), they have also been reported from fish, salamanders, reptiles, and some invertebrates (mollusks and insects). They are of no medical or economic importance, but they are interesting because their reproductive cycles are apparently controlled by the host’s hormones. In addition, opalinids are routinely encountered in dissections of frogs in college biology laboratories, and most students are …
aka: Possums
Arkansas opossums (commonly referred to as “possums”) are of the Virginia opossum species Didelphis virginiana and can be found in both rural and urban habitats. The Arkansas Game and Fish Commission tracks opossum populations and oversees an opossum hunting season during the winter months. As the only marsupials found in North America, opossums have existed for 70–80 million years. They are highly adaptable omnivores who eat a variety of foods including insects, rodents, berries, grasses, leaves, and carrion. The females can have twenty to twenty-five babies in one litter and carry their young in their pouches for up to three months. Opossums have opposable thumbs on their rear feet and can also grasp with their tails. Contrary to popular belief, …
Zaphney Orto, a prominent physician who helped discover the link between malaria and mosquitoes, was a U.S. army major and surgeon during the Spanish-American War, and the second president of Simmons First National Bank, founded in Pine Bluff (Jefferson County). Born to Leonidas Orto and Martha G. McElwee Orto in Somerville, Tennessee, in 1842, Zaphney Orto lived on a farm near Somerville until he was eighteen, then worked in a store for two years. He studied medicine with Dr. S. W. Thompson of Evansville, Indiana, and graduated from the Miami Medical College of Cincinnati, Ohio, in 1872. Shortly afterward, he moved to Arkansas, where he settled in Clover Bend (Lawrence County). He practiced medicine there for two years before moving …
aka: Seed Shrimps
Ostracods belong to the Class Ostracoda within the Subphylum Crustacea and Phylum Arthropoda. Commonly called “seed or mussel shrimps,” the class encompasses over 33,000 described species and subspecies, and many more remain unknown to science and await formal description. There are two subclasses with living representatives: the Myodocopa and Podocopa. The former is exclusive to marine environments but occupies the benthos as well as the plankton, whereas podocopans occur in marine, brackish, and freshwater environments and occupy almost exclusively the benthos (but also the benthopelagic zone). The main orders are the Archaeocopida, Leperditicopida, Palaeocopida, Podocopida, and Myodocopida. As of 2019, there is no comprehensive list of extant ostracods in Arkansas. Ostracods are important fossil organisms, as they are the most …
The Ouachita Mountains Biological Station (OMBS) began serving the needs of colleges and universities as a research and education center in 1962. The OMBS was the vision of husband-and-wife team Dr. Richard K. (Dick) Speairs Jr. (1920‒2004) and Dr. Betty McKnight Speairs (1925‒2018), formerly of Louisiana State University and Centenary College (both in Shreveport, Louisiana), respectively. Together they founded the Speairs Charitable Foundation for the perpetual support of the OMBS. The station hosts collegiate groups, graduate students, faculty, and researchers for any aspect of field research and biological education. It is available at any time during the year by reservation only. The OMBS is located in the central part of the Ouachita Mountains of Arkansas, between the towns of Mena …
The Ouachita streambed salamander (Eurycea subfluvicola) is a species belonging to the Class Amphibia, Order Caudata, and Family Plethodontidae. It is a relatively newly described Arkansas endemic species, found at a single locality in the Ouachita Mountain physiographic province, and has one of the smallest, perhaps the smallest, known geographic distribution of any North American salamander. The original specimen was collected in May 2011 by researchers from the Arkansas Game and Fish Commission and Tulsa University in Oklahoma. Because the specimen was similar in morphology to the larvae of many-ribbed salamanders (Eurycea multiplicata), which are common in the area and inhabit the same stream, collectors did not initially realize they might have a new species in hand. Once they returned …
aka: Amblyopsis rosae
The Ozark cavefish (Amblyopsis rosae) is found in the Springfield Plateau of the Ozark Mountains. Its geographic distribution covers approximately 8,200 square miles (21,000 square kilometers), comprising an area drained by the White River on the south and the east, the Neosho River (Arkansas River basin) on the west, and the Osage River (Missouri River basin) to the north. This species has been reported in at least fifty-two caves over three states: Missouri, Arkansas (originally in ten but now in seven sites in Benton County), and northeast Oklahoma. It has been proposed that there are two subspecies of this fish: Amblyopsis rosae whitae for the White River drainage region and Amblyopsis rosae arkansasus for the middle Arkansas River drainage region. …
aka: Cryptobranchus alleganiensis bishopi
The salamander called the Ozark hellbender (Cryptobranchus alleganiensis bishopi) is one of two subspecies of hellbender (Cryptobranchus alleganiensis). Historically, the eastern hellbender (C.a. alleganiensis) is found throughout much of the upland areas of the United States east of the Mississippi River; it also inhabits northern portions of the Ozark Mountains of Missouri. The Ozark hellbender occurs in several southern-flowing streams of the Ozark Mountains of Missouri and has a very restricted range in Arkansas, occurring only in the upper reaches of the Spring River, in portions of the Eleven Point River in Randolph County, and in the White River at Batesville (Independence County) and near the town of Norfork (Baxter County). The hellbender, North America’s largest salamander, sometimes grows to …
aka: Geomys bursarius ozarkensis
The Ozark pocket gopher is a small mammal that belongs to the family Geomyidae (pocket gophers) and the order Rodentia (rodents). It is endemic to Arkansas, occurring in Izard County. The common name “pocket gopher” comes from the fur-lined cheek pouches that these animals use to carry food. Two species of pocket gophers live in Arkansas. Geomys bursarius can be found from southern Manitoba southward through the central plains of the United States toward Arkansas and Texas, with the subspecies G. b. ozarkensis found in the southwestern one-third of Izard County in Arkansas. Although a few individuals have been captured on the southern side of the White River in adjacent Stone County, no current population resides in any other county …
aka: Spoonbill Catfish
Paddlefish belong to the family Polyodontidae and order Acipensiformes. There are six known species—four are extinct (three from western North America, one from China) and known only from fossil remains, while two extant species include the paddlefish (Polyodon spathula), which is native to the Mississippi River basin in the United States, and the gigantic critically endangered Chinese paddlefish (Psephurus gladius) endemic to the Yangtze River Basin in China, where they lived primarily in the broad-surfaced main stem rivers and shoal zones along the East China Sea. Paddlefish are basal Chondrostean ray-finned fish; they are archaic and have been referred to as “primitive fish” because they have evolved with few unique morphological changes since the earliest fossil records of the late …
Two, possibly three, huge rocks from outer space put the Arkansas town of Paragould (Greene County) into the history and science books early in 1930. What is now known as the Paragould Meteorite was, at that time, the largest meteorite to ever have been seen falling and then recovered. A belt of rocks known as the asteroid belt, left over from the formation of the solar system, orbits the sun mainly between the orbits of planets Mars and Jupiter. Due to the gravity of nearby Jupiter, some of these rocks can stray inward and cross Earth’s orbit, even striking it. At 4:08 a.m. on February 17, 1930, the orbit of one of these rocks crossed Earth’s orbit, and two fields …
The Subphylum Crustacea (Phylum Arthropoda) represents a diverse group of animals with members within several classes and orders, including the Amphipoda, Branchiura, Cirripedia, Copepoda, Isopoda, and Tantulocarida. (The Pentastomida, composed of parasites, are sometimes included in this subphylum and sometimes considered a separate phylum.) There are two classes with parasites: the Maxillopoda and Malacostraca. The majority of crustaceans are aquatic, living in either marine environments or fresh water, but a few groups have adapted to a terrestrial existence, such as some species of crabs and woodlice. Most crustaceans move about independently and live a free existence, although some are parasitic (about 30,000 named species) and live attached as ectoparasites to their hosts, including fish, sea, and whale lice, as well …
aka: Ectopistes migratorius
The passenger pigeon (Ectopistes migratorius) was a North American bird species in the order Columbiformes (pigeons and doves) that became extinct in the early twentieth century. The fate of the passenger pigeon serves as a graphic lesson in the misuse of natural resources, as the species went from an almost indescribable abundance to extinction in only a few decades. The decline came primarily as a result of relentless persecution of its breeding colonies by market hunters, largely for meat, with no (or ineffectual) regulation that might have maintained a stable population. The passenger pigeon had the same general body shape as the common and familiar mourning dove (Zenaida macroura) but was larger and somewhat more colorful, with areas of slate-blue …
Pauropods belong to the Phylum Arthropoda, Subphylum Labiata, Superclass Myriapoda, and Class Pauropoda. They are small, pale, millipede-like arthropods. There are about 830 species in twelve families worldwide, and they live under rocks in moist soil, leaf mold, and woodland litter. Only a single species, Eurypauropus spinosus, has been reported from Arkansas, but there are likely more that would be uncovered with further research. The only known fossil pauropod is Eopauropus balticus, a prehistoric species known from mid-Eocene Baltic amber (40 to 35 million years ago). Because pauropods are normally soil-dwelling, their presence in amber (fossilized tree sap) is unusual, and they are the rarest known animals in Baltic amber. They appear to be an old group closely related to …
Pellagra is a form of malnutrition caused by a severe deficiency of niacin (also known as nicotinic acid or vitamin B3) in the diet. The disease affected thousands of Arkansans and other Southerners in the late nineteenth and early twentieth centuries. Symptoms of pellagra can include lack of energy, outbreaks of red splotches on the skin, diarrhea, and—in extreme cases—depression, dementia, and even death. Pellagra is not contagious, and the condition can be reversed. The lethargic appearance of pellagra victims was also a symptom of two other diseases widely found in the South at the time, hookworm and malaria. These three contributed to the false stereotype of Southerners at this time as lazy. Pellagra was first recognized as a disease in 1762 …
aka: Tongue Worms
The phylum Pentastomida (some consider it a class) includes four orders, seven families, and about 144 species, including eight extinct species from the Paleozoic Era. They are wormlike obligate parasites, meaning that they cannot complete their life cycle without a host. As adults, they inhabit the respiratory tract (lungs and nasal passages) of vertebrates. Four species are known from intermediate host insects (three coprophagus cockroaches and one coleopteran). In addition, fishes are common intermediate hosts for pentastomes occurring in crocodilians and piscivorous chelonians, and rarely for some species of snakes. Definitive hosts include amphibians (few hosts) but mainly reptiles (lizards, snakes, freshwater turtles, and crocodilians), the latter making up about seventy percent of hosts. The most common genera of reptilian …
The Percidae is a family containing three subfamilies and approximately 250 species within eleven genera of perciform fishes found mostly in freshwater and brackish waters of the Northern Hemisphere. Most are found in the Nearctic realm. It is one of the largest families in North America, making up about one-fifth of all fish biota, only outnumbered by the Cyprinidae. There are also some Palearctic (Eurasian) species in the genera Gymnocephalus (four species), Percarina (two species), Romanichthys (single species), and Zingel (four species). The family includes the perches and their relatives, with some well-known species such as the ruffe, sauger, walleye, and three species of perch. However, much smaller fishes restricted to North America known as darters are also an integral …