Stephen W Chordas III

The Ohio State University | OSU · Center for Life Sciences Education

Six new state records are presented for the toad bug Gelastocoris oculatus oculatus (Fabricius): Delaware, Iowa, Massachusetts, New Hampshire, New York, Virginia, and Wyoming. The species is now known from 28 states and three Canadian provinces.

The handsome fungus beetles (Coleoptera:Endomychidae: Lycoperdininae, Epopocinae) Aphorista vittata (Fabricius, 1787) & Epipocus punctatus LeConte, 1853 are reported for Oklahoma for the first time.

Hemipterans belong to the largest order of hemimetabolous insects. The number of species in the order is about 75,000, with a great diversity of forms, including the largest family, Miridae (plant bugs). It contains major insect pests and predatory groups that can be used as biological control agents. Here, we document three species of Miridae in O...

Our knowledge of the true bugs (Hemiptera) of Oklahoma has grown over the last decade. Several reports from our lab have provided new records of hemipterans in the state for the first time. Here, we continue our efforts by providing seven new state records for species of hemipterans within the families Miridae, Pentatomidae, Reduviidae, and Rhyparo...

Fifty-one species of Reduviidae (Hemiptera: Heteroptera) are recorded from Belize; literature citations are provided where relevant, and specimen data are included for examined material. Thirteen previously-described species are reported from Belize for the first time, ten of which represent new generic records: Eupheno histrionicus Stål, 1862 (Cet...

Documents 3 species of Nabidae (Hemiptera) new to Arkansas.

The most recent catalog of the true bugs of the United States and Canada was published 30 years ago (Henry and Froeschner 1988) (Note: since this journal is printed and disseminated in April following the year of submission, the date on this paper says 2017, but was distributed in April of 2018, thus it has indeed been 30 years). The 1988 catalog c...

We determined the sex-ratio of 1,095 plant bugs (Hemiptera: Miridae) taken from 60 individual UV light-trap samples in Clark County, Arkansas, over a two-year period. We found that of the 21 taxa in which a sex-ratio determination could be made, 61.9% of them (13 of 21) contained a majority (over 50%) of males. Three taxa were exclusively represent...

The question whether taxonomic descriptions naming new animal species without type specimen(s) deposited in collections should be accepted for publication by scientific journals and allowed by the Code has already been discussed in Zootaxa (Dubois & Nemésio 2007; Donegan 2008, 2009; Nemésio 2009a–b; Dubois 2009; Gentile & Snell 2009; Minelli 2009;...

This plot is not part of the published stance but derives from it. The plot shows the number of authors by geographic region (courtesy of Dr. Diego Astua).

We report the following four uncommonly encountered assassin bug species: Empicoris errabundus, E. rubromaculatus, Ploiariacarolina, and P. hirticornis (Hemiptera: Reduviidae: Emesinae) for the first time from Arkansas. Both genera also were unreported previously for the state. Our Ploiariacarolina record constitutes a significant western range ext...

Pocket gopher burrows were sampled from 22 counties within Arkansas to determine the associated faunal composition of three major families of Coleoptera (Histeridae, Leiodidae and Scarabaeidae) commonly associated with pocket gopher burrows. We collected eight species of Histeridae, four species of Leiodidae and eight species of Scarabaeidae from t...

Rhagovelia chac n. sp. is described from the mountains of interior Belize. This species is morphologically similar to Rhagovelia planipes Gould, which occurs in the adjacent basal section of the Yucatan Peninsula. Figures of the male and female dorsal habitus and male genitalic structures are provided, accompanied by a distribution map and a photo...

Rhagovelia nigranota n. sp., is described from southern Mexico, and represents the first species in the robusta group to be recorded from that country. Figures of the male and female dorsal habitus and male genitalic structures are provided, accompanied by a distribution map.

The family Notonectidae occurs throughout North America and has been previously reported from all provinces and territories in Canada (except Nunavut) and 48 of the United States (only New Hampshire and Alaska lacked records). We report this family from New Hampshire for the first time. It is represented by 10 species in two genera: Buenoa confusa,...

Thirty one species of true bugs (Hemiptera: Heteroptera) were collected from pitfall traps set in old-field grasslands in Summit and Portage Counties, Ohio, between 2002 and 2005. Of these, eight were new state records including: Corimelaena pulicaria (German), Cryphula trimaculata (Distant), Emesaya brevipennis brevipennis (Say), Hebrus burmeister...

Pocket gopher burrows provide a stable environment for a variety of inquilines; hence this mammal is regarded as a keystone species. Most of the arthropods inhabiting pocket gopher burrows are restricted to this microhabitat. As part of a planned state-wide biotic survey of insects inhabiting this unusual microhabitat, we have focused our initial s...

Corisella inscripta is a water boatman species that was reported in H. B. Hungerford’s (1948) seminal monograph as occurring throughout Mexico and nine western states of the United States. Subsequently, additional records of C. inscripta have been reported for British Columbia in Canada (Maw et al. 2000) and for Montana (Roemhild 1976), Arkansas (C...

The terrestrial true bug (HemipterarHeteroptera) fauna of Arkansas is poorly represented in the literature. Between 1998 and 2004, we retained Hemiptera specimens collected while conducting a few scattered entomological projects. Ninety-nine species of terrestrial Hemiptera, representing 15 families, were collected from various locations within 9 A...

The dipteran fauna of Arkansas is generally poorly known. A previous study of the Aquaticmacroinvertebrates of the WhiteRiver National WildlifeRefuge, the largest refuge in Arkansas, reported only 12diptera taxa out of 219 taxa collected (Chordas et al., 1996). Most of the dipterans from thisstudywere identified onlyto the family level. The familyC...

Recent aquatic Hemiptera collections have yielded 15 new state records distributed among four midwestern States. These records include two species of water boatmen (Palmacorixa gillettei and Sigara mathesoni) new for Indiana, four water boatmen species (Cenocorixa utahensis, Corisella inscripta, Hesperocorixa laevigata, S. decorata), including one...

The vertical migration patterns of eight freshwater mussel species were studied in outdoor enclosures. Individual experiments lasted from nine to 20 months, during which time mussels were observed three times per week. The mussels displayed two patterns of seasonal vertical migration; in both patterns populations of each species surfaced during spa...

Three Buenoa species were recently collected from nine Ohio wildlife areas. Buenoa margaritacea was collected in black light traps and dip-net samples. Two other species, B. confusa and B. scimitra, were collected solely by dip-nets. Both B. confusa and B. margaritacea have been reported from states bordering Ohio, and were expected for Ohio. Bueno...

While the family Notonectidae is considered cosmopolitan throughout North America, no published records exist for its presence in two of the United States: Delaware and New Hampshire. We newly report this family for Delaware. It is represented by seven Species in two genera; Buenoa margaritacea, B. scimitra, Notonecta insulata, N. irrorata, N. rale...

Over the past few years we obtained three female Libellula luctuosa specimens, all collected in northeast Ohio, which exhibited unusually reduced wing pigmentation. The individuals were extremely difficult to identify as most keys rely heavily upon wing pigmentation for identification of many Libellula species. A description of this aberrant wing p...

Corisella tarsalis, Sigara lineata, Trichocorixa borealis, and Trichocorixa kanza were recently identified from Michigan and constitute new state records. These four species were collected from two of the Great Lakes or their connecting rivers and increase the number of corixids for Michigan to 47 species. We newly report the genus Corisella for Mi...

The oligochaete, Lumbriculus variegatus, was used to examine the utility of critical body residues in describing lethal and sublethal chronic endpoints during polychlorinated biphenyls (PCB) exposure. L. variegatus was exposed to four 14C-PCB congeners and 2,2-bis-(p-chlorophenyl)-1,1-dichloroethylene (DDE) on algal cells. Accumulation and resultin...

Notonectidae are common and widespread insects throughout the United States and Canada, but no notonectids have been reported from West Virginia. We now report this family to be represented in the state by four species in two genera, Buenoa margaritacea, Notonecta indica, Notonecta irrorata and Notonecta undulata. Additionally, we provide a list of...

One new genus and five new species of corixids have recently been recorded from Ohio as part of a comprehensive survey of adult aquatic insects. The total number of corixid taxa now known from Ohio is 25. All five taxa were collected using black light traps. The newly reported genus, Corisella, is known mainly from western North America. Corisella...

The objectives of this study were to survey the diversity of the aqua· tic macroinvertebrates of the White River National Wildlife Refuge (WRNWR) and determine relative abundances and distributional and seasonal patterns. No comprehensive investigation of WRNWR aquatic macroinvertebrates had been conducted previously. Thirty sampling stations were...

Thesis (M.S.)--Arkansas State University, 1992. Includes bibliographical references (leaves 47-49).