Science and Technology

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Ferns

Ferns are among the most ancient plant forms, distinguished by having a defined vascular system, reproducing by spores, and often having deeply divided leaves that unfurl from a coiled fiddlehead (crozier). They originally appeared in the fossil record about 360 million years ago, but most modern ferns arose in the early Cretaceous period about 145 million years ago. Discussed here are “true” ferns as understood in the horticultural sense and not in the broader classification used by botanists that include horsetails (Equisetum, of which Arkansas has four species), whisk ferns (Psilotum, one species), and sometimes Selaginella (ten species). Using botanist James H. Peck’s inclusive 2011 list, Arkansas has about eighty species of true ferns that are native to the state, …

Fess, Don

Don Fess of Magnolia (Columbia County) built and patented a prototype engine that saved energy by using rotating pistons rather than the standard up-and-down pistons. Don Fess was born in Allendale, Illinois, on February 12, 1915. His parents, Ora and Eunice Fess, moved with their four sons to Haynesville, Louisiana, in about 1925. Fess finished high school there at age sixteen (at that time, Louisiana schools had only eleven grades) and began to look for a job. He married Martha Emma Wainwright on June 1, 1934, and built a house across the street from his parents using salvaged lumber. He delivered ice seven days a week for a wage of $1.50 per day. He and his wife had six children. …

Fish

Arkansas fishes are a combination of abundant and rare species—primitive and ancestral, commercial and sport, game and non-game, native and introduced, and transplanted and exotic. There are approximately 233 fish species in Arkansas. Arkansas has a relatively rich fish fauna compared to neighboring states (which range between 148 and 319 fish species). Some species, such as the western mosquitofish (Gambusia affinis), are common statewide, whereas other species, such as the yellowcheek darter (Etheostoma moorei), have more restricted distributions. Distinct differences in topography and geology between northwestern (upland) and southeastern (lowland) Arkansas have led to distinctly different groups of fish species developing in each of these regions. For example, because of an abundance of clear, gravel-bottom, flowing streams in northwestern Arkansas, …

Fleas

Fleas are small, wingless, hematophagous (blood-feeding) ectoparasites that belong to the Phylum Arthropoda, Class Insecta, and Order Siphonaptera. There are four recognized suborders—Ceratophyllomorpha, Hystrichopsyllomorpha, Pulicomorpha, and Pygiopsyllomorpha—with about 246 recognized genera and over 2,500 described species within sixteen families. Adult fleas feed on blood of mostly mammals (about ninety-four percent of known species), including dogs, cats, and humans, with the remainder of species parasitizing birds. Fleas are an important component of the worldwide biota. In addition, they can be nuisance biters, and some serve as vectors or intermediate hosts of flea-borne disease agents and parasites. The most recent summary listed twenty-nine species of fleas in Arkansas. Fleas are most closely related, evolutionarily speaking, to insects in the orders Diptera (true …

Forest Fire Lookouts

aka: Fire Towers
Fire towers (also known as lookouts) go back thousands of years. The oldest lookout still standing is the Tuztoromy Firewatch Tower in Sopron, Hungary, which was built in the thirteenth century and remodeled in 1681. The first one built in America was in downtown Harlem, New York, constructed in 1856 in what is now Marcus Garvey City Park. The first fire lookout strictly for protection of American forests was built in 1902 at Bertha Hill near Headquarters, Idaho. At the height of their use (1930s to 1970s), Arkansas had more than 120 fire towers; by 1994, forty-eight were still standing, and by 2023, there were forty-six. Arkansas has fourteen lookouts on the National Historic Lookout Register and three on the …

Fort Smith Tornado of 1898

On January 11, 1898, a tornado tore through Fort Smith (Sebastian County) and killed more than fifty people; it is one of the deadliest tornadoes in Arkansas history. At around 11:00 p.m. on January 11, 1898, a tornado formed in Oklahoma west of Fort Smith and headed toward the city. After crossing the Poteau River, it slammed into the Fort Smith National Cemetery, where it was reported that “huge trees are uprooted, the lodge demolished and the wall torn down.” Marble-sized hail pummeled buildings in the town, including hotels and boarding houses that were packed with travelers because the federal court was in session. The tornado hit Fort Smith’s business district hard, smashing buildings and tearing off roofs before continuing …

Fossils

Fossils are the remains of animals and plants that have been preserved in the earth’s crust. They can consist of the remains of invertebrates (animals without a backbone) or vertebrates (animals with a backbone). The majority of fossils in the fossil record, and from Arkansas, are invertebrate remains. Fossils are found mostly in sedimentary rocks, as compared to igneous and metamorphic rocks, and can form in a variety of ways. Animals living in the water column in the ocean die, and their shells or hard parts sink to the bottom of the seafloor and become preserved in sediments that later may lithify, or change to rock. Other animals crawl on the seafloor through sand and silt or burrow into the …

Fourche Mountain Salamander

aka: Plethodon fourchensis
The Fourche Mountain salamander (Plethodon fourchensis) is a slender, large (115–178 millimeters in total length) terrestrial salamander that is one of twenty or so members of the caudate family Plethodontidae that can be found in Arkansas. This species is one of three endemic salamanders known to exist in Arkansas and is confined to Fourche Mountain and Irons Fork Mountain in the south-central region of the Ouachita Mountains. Normally, these salamanders can be found beneath the surface rock of hillsides and valleys within these mountains; however, they can also be found under rotting logs on the forest floor. Adults of this species possess two longitudinal rows of large, white blotches on the back; the dorsal body color is, otherwise, uniformly black. …

Freshwater Drum

aka: Grunter
aka: Gaspergou
The freshwater drum (Aplodinotus grunniens) belongs to the order Perciformes and family Sciaenidae; it is the only freshwater member of the family. Freshwater drum are endemic to freshwater environs of the Americas, and their distributional range extends as far north as the Hudson Bay of Canada and reaches as far south as the Usumacinta River Basin of Guatemala. In the United States, eastward distribution includes the eastern Appalachians westward as far as Kansas, Oklahoma, and Texas. This fish appears to have the greatest latitudinal range of any freshwater fish in North America. In Arkansas, A. grunniens occurs throughout the state but mainly is found in the larger lakes and rivers. The closest living relatives of A. grunniens are a group …

Fungi

Arkansas is home to a diverse and remarkable group of fungi, which are separated by mycologists (biologists who specialize in the study of fungi, or mycology) into species representing the true fungi belonging to the kingdom Fungi (e.g., chytrids, pin molds, sugar molds, club fungi, yeasts, sac fungi, and mushrooms) and a hodgepodge of other fungus-like protists (e.g., slime molds, water molds, downy mildews). Members of the kingdom Fungi are descended from a common ancestor, while fungus-like protists, though not necessarily closely related to each other or to the true fungi, are similar to true fungi in appearance and action. Characteristics of Fungi Although the number of fungal species in Arkansas is not known, fungi are quite diverse worldwide. According …

Gars

aka: Garfish
aka: Garpikes
Gars are a primitive group of euryhaline fishes dating back to the late Jurassic to early Cretaceous Period, about 150 million years ago. Gars are one of the most recognizable fishes because of their slender torpedo-shaped bodies, ganoid scales, and long snouts with numerous teeth. Dorsal and anal fins are set far back on the body, and the caudal fin is rounded, with a condition known as abbreviate-heterocercal. Gars are unusual among fishes in that their vascularized swim bladders can function as lungs; they must surface periodically to take a gulp of air. Arkansas hosts four gar species: the alligator gar (Atractosteus spatula), spotted gar (Lepisosteus oculatus), longnose gar (L. osseus), and shortnose gar (L. platostomous). Fossilized gar specimens have …

Garver, Neal Bryant

Neal Bryant Garver arrived in Little Rock (Pulaski County) in 1918 to help provide engineering services for the construction of a munitions plant during World War I. As the Arkansas State Highway Department’s first bridge engineer, Garver also led the design of more than 2,000 bridges from 1921 to 1950, helping to modernize the state’s roadways by adding river crossings. In 1919, Garver started what became the state’s largest engineering firm, which began by providing structural engineering services for Little Rock High School (later called Little Rock Central High), North Little Rock High School, the Pulaski County Jail, and many other structures. Neal Garver was born on February 17, 1877, in Lee County, Iowa, near the Mississippi River, to the …

Gastrotrichs

aka: Hairybacks
The Phylum Gastrotricha (commonly called “hairybacks”) comprises about 800 species of marine, brackish, and freshwater microscopic invertebrates. Twelve genera and fewer than 100 species of freshwater gastrotrichs are known from North America. However, in North America, perhaps 75 to 90 percent of the probable diversity of freshwater gastrotrichs species are undescribed. Gastrotrichs are widely distributed cosmopolitan organisms that are divided into two orders: the Macrodasyida (with nine families), which, except for two freshwater species (Marinellina flagellata and Redudasys fornerise), are marine, and the Chaetonotida (seven families), some of which are marine, estuarine, and semi-terrestrial forms, while others are primarily found in freshwater. The Chaetonotida can be further broken down into two suborders: the Multitubulatina (Nesodasys) and the Paucitublatina (Chaetonotus, Dasydytes, …

Geckos

Geckos are lizards that belong to the Class Reptilia, Order Squamata, Suborder Sauria (Lacertilia), and Infraorder Gekkota within seven families, including Carphodactylidae (seven genera, thirty species), Diplodactylidae (twenty-five genera, 137 species), Eublepharidae (six genera, thirty species), Gekkonidae (fifty-four genera, 1,264 species), Pygopodidae (eight genera, thirty-five species), Phyllodactylidae (nine genera, 100 species), and Sphaerodactylidae (twelve genera, 200 species). By far, the true geckos (Gekkonidae) are the largest family of lizards. Many common geckos are members of this family, including dtellas (Gehyra), house geckos (Hemidactylus), true geckos (Gekko), and day geckos (Phelsuma). Geckos are cosmopolitan in distribution and are particularly species-rich in the tropics. At least one type of gecko is found in Arkansas. Geckos probably evolved in the Lower Cretaceous, and …

Gerig, William Lee

William Lee Gerig was a civil engineer working on railroads and dams in both the United States and abroad, including his service as chief engineer for the construction of the Panama Canal. By the end of his career, he had consulted on every dam built in the United States from 1923 to 1938. William Gerig was born on March 25, 1866, in Boone County, Missouri, the son of Swiss immigrants Francis Joseph and Carolyn Degan Gerig. William Gerig’s grandfather Degen came to America in the early eighteenth century to practice civil engineering. His father, Francis Joseph, assisted in the construction of the Suez Canal before settling in Missouri. As a young boy, the instruments that surveyors used fascinated Gerig, and …

Goldeyes and Mooneyes

aka: Mooneyes and Goldeyes
aka: Hiodontid Fishes
North American freshwater fishes of the family Hiodontidae (order Hiodontiformes or Osteoglossiformes) include the goldeye (Hiodon alosoides) and mooneye (H. tergisus). The goldeye ranges from James Bay (bordering the provinces of Ontario and Quebec) in Canada and the Mississippi River basins from the Northwest Territory to western Pennsylvania and Ohio south to Louisiana. In Arkansas, H. alosoides is found sporadically in lakes and the larger turbid rivers of the state, including the Arkansas and Mississippi, and the smaller Black River. The mooneye (also called the “freshwater tarpon”) ranges from the St. Lawrence–Great Lakes, Mississippi River, and Hudson Bay basins from Quebec and Alberta, Canada, east to western North Carolina and south to Louisiana. In Arkansas, H. tergisus occurs in large …

Good, Mary Lowe

Mary Lowe Good was a renowned chemist, industrial innovator, professor, and government leader. Good was the first woman in Arkansas to earn a PhD in the so-called hard sciences such as chemistry or physics (fellow Arkansan Margaret Pittman was awarded a PhD in bacteriology in 1929). Good was the first woman elected to the board of the American Chemical Society, and she held important U.S. government positions under the administrations of four presidents. Mary Lowe was born in Grapevine, Texas, on June 20, 1931. Her parents were Winnie Lowe, who was a teacher and librarian, and John Lowe, a school principal; she had three siblings, including Betty Ann Lowe, who became a renowned hospital administrator. In 1942, the family moved …

Greers Ferry Dam and Lake

Greers Ferry Dam on the Little Red River, approximately three miles north of Heber Springs (Cleburne County), is a concrete dam built between 1959 and 1962. The dam’s primary function is flood control, but it also serves as a hydroelectric power plant. Greers Ferry Lake, created as a result of the dam, is a popular recreational destination. The flow of the Little Red River was uncontrolled during the first half of the twentieth century, resulting in almost yearly flooding downstream; high water levels in the Little Red River could compound flooding problems further downstream along the White River. In 1938, Congress passed the Flood Control Act, which authorized the U.S. Army Corps of Engineers to build dams on most of …

Grotto Salamander

aka: Eurycea spelaea
aka: Ghost Lizard
aka: Ozark Blind Salamander
The grotto salamander (Eurycea spelaea) is a species of lungless salamander in the Phylum Chordata, Subphylum Vertebrata, Class Amphibia, Order Caudata, and Family Plethodontidae. It was originally described as Typhlotriton spelaeus but is now considered a member of the genus Eurycea. It is endemic to wet caves, sinkholes, and karst regions beneath the Springfield and Salem Plateaus of the Ozark Mountains of 120 individual sites in northern Arkansas, 124 sites in southwestern Missouri, forty-three sites in northeastern Oklahoma, and one county (Cherokee) in extreme southeastern Kansas. Its natural habitats are freshwater springs, inland karsts, and caves. It is not listed by the federal government as endangered or threatened, but it is vulnerable to changes in groundwater quality and a reduction …

Haemogregarines

Haemogregarines are protist parasites that belong to the Phylum Apicomplexa, Class Conoidasida, Order Eucoccidiorina, and Suborder Adeleorina, and include the following seven families: Adeleidae, Dactylosomatidae, Haemogregarinidae, Hepatozoidae, Karyolysidae, Klossiellidae, and Legerellidae. There are two major genera, Haemogregarina and Hepatozoon, in addition to several minor ones, including Babesiosoma, Bartazoon, Cyrilia, Dactylosoma, Desseria, Hemolivia, and Karyolysus. As a group, these parasites are cosmopolitan in their range of infected hosts (such as turtles, crocodiles, birds, reptiles, and mammals) and geographic distribution. In general, haemogregarines sensu lato (meaning, in a broad sense) are elongate to fusiform ovoidal organisms that occur within the erythrocytes (red blood cells) of various animals, mostly poikilothermic vertebrates (animals whose internal temperatures vary widely). They form a group of diverse …

Handywagon

The Handywagon, built in 1964 for the Arkansas Louisiana Gas Company (Arkla), was intended as an economical vehicle for use by the company’s Gaslite and domestic appliance servicers, meter readers, collectors, and meter setters. The small wagon was designed to be easily reparable and average thirty-five miles per gallon. In mid-1963, Arkla board chairman Wilton “Witt” R. Stephens asked company lawyer Raymond Thornton to design a utility vehicle that could operate economically, have a 900-pound load capacity, weigh less than a ton and a half, and be company-built. In 1964, Thornton chose Ed Handy, a company construction engineer, to collaborate with him on the project. After much research, the two men found the power train they needed in Holland. Van …

Harding, Arthur McCracken

Arthur McCracken Harding, the first Arkansas-born president of the University of Arkansas (UA) in Fayetteville (Washington County), served his alma mater as a professor and in various administrative positions from 1905 to 1941, and then as president from 1941 to 1947. His teaching was marked by publication of books on mathematics and astronomy, and his administrative service developed new programs and extension of university education throughout Arkansas. As university president, he worked to quell political turmoil and helped UA face changes to the university brought by World War II. Arthur McCracken Harding was born on September 3, 1884, in Pine Bluff (Jefferson County), the eldest of seven sons, to Charles Taylor Harding and Florence May Brewster Harding. (His great-grandfather was …

Harris, Ernest James

Ernest James Harris was an accomplished entomologist known for his work on breeding Biosteres arisanus, a species of wasp that parasitizes fruit fly eggs. Thanks to the work done by Harris, B. arisanus has been bred on a large scale for the purposes of pest eradication. More than twenty nations have adopted use of the “Harris strain” of the wasp for fruit fly eradication. Harris was inducted into the Arkansas Black Hall of Fame in 1999. Ernest J. Harris was born on May 24, 1928. His parents had a farm in North Little Rock (Pulaski County), where Harris’s interest in insects first developed. After graduation, he attended Arkansas AM&N (now the University of Arkansas at Pine Bluff). There, he majored …

Harry K. Dupree Stuttgart National Aquaculture Research Center

The U.S. Department of Agriculture Agricultural Research Service (USDA-ARS) actively supports aquaculture through research conducted at the Harry K. Dupree Stuttgart National Aquaculture Research Center (HKDSNARC) in Stuttgart (Arkansas County). The mission of the HKDSNARC is to conduct cutting-edge research that addresses the highest priorities of the U.S. aquaculture industry, as well as serving as a global leader in aquaculture research. The research conducted addresses vital issues that are national in scope and result in new knowledge that informs scientists, farmers, feed mills, pharmaceutical companies, processors, teachers, governmental agencies, and consumers. The HKDSNARC collaborates with universities, international research institutions, government agencies, and private industry. Since the 1970s, aquaculture has been the fastest-growing sector of global food production. Global aquaculture production in …

Harvestmen

aka: Daddy Long-Legs
aka: Granddaddy Long-Legs
Harvestmen belong to the Phylum Arthropoda, Subphylum Chelicerata, Class Arachnida, and Order Opiliones. They represent the third most diverse order in Arachnida. The order Opiliones includes five suborders as follows: Cyphophthalmi, Eupnoi, Dyspnoi, Laniatores, and Tetrophthalmi. They are often referred to as “daddy long-legs.” They are found throughout the world (except Antarctica), and there are over 6,650 species. Their common name is derived from the fact that they are common during the harvesting season. They are traditionally akin with the Order Acari (ticks and mites) or the Novogenuata (the Scorpiones, Pseudoscorpiones, and Solifugae); however, others suggest the Opiliones forms a clade with the scorpions and two smaller orders. As such, they are considered the sister group of scorpions. In addition, …

Hemipterans

aka: True Bugs
Hemipterans, or true bugs, belong to the Phylum Arthropoda, Superclass Hexapoda, Class Insecta, Order Hemiptera, and four suborders: Auchenorrhyncha, Coleorrhyncha, Sternorrhyncha, and Heteroptera. Hemiptera is the largest order of hemimetabolous insects (those not undergoing complete metamorphosis), although male scale insects (Coccoidea) do undergo a form of complete metamorphosis. The number of species in the order is about 75,000, with a great diversity of forms, including aphids, cicadas, leafhoppers, planthoppers, and shield bugs. The three largest families of Heteroptera are Miridae (plant bugs), Lygaeidae (seed bugs), and Pentatomidae (stink bugs). The largest family, Miridae, contains major insect pests and predatory groups that can be used as biological control agents. Although hemipterans inhabit a wide variety of habitats, most are generally terrestrial, …

Herrings

aka: Clupeids
Herrings (Order Clupeiformes) belong to a large family (Clupeidae) of about 200 species within fifty-four genera of cosmopolitan ray-finned fishes that are mostly marine; a few inhabit freshwater, and some are anadromous—that is, they migrate up rivers from saltwater habitats for purposes of spawning. The family includes herrings, menhadens, sardines, and shads. Most herrings are small fishes, generally being less than 300 mm (12 in.), but some may reach 750 mm (30 in.). Many are valuable food fishes and are collected for production of fish meal and oil, protein concentrate, and fertilizer. Some commercially important species include Atlantic herring (Clupea harengus) found in the north Atlantic, Pacific sardine (Sardinops sagax), and Atlantic menhaden (Brevortia tyrannus). In the fossil record, clupeid …