Isoplastus fossor Horn, 1880

Peck, Stewart B. & Cook, Joyce, 2013, Systematics and distributions of the genera Cyrtusa Erichson, Ecarinosphaerula Hatch, Isoplastus Horn, Liocyrtusa Daffner, Lionothus Brown, and Zeadolopus Broun of the United States and Canada (Coleoptera: Leiodidae: Leiodinae: Leiodini), Insecta Mundi 2013 (310), pp. 1-32: 7-8

publication ID

http://doi.org/10.5281/zenodo.5193714

publication LSID

lsid:zoobank.org:pub:1CC5FBEF-1373-444C-AA1C-0E80445A7B6E

DOI

http://doi.org/10.5281/zenodo.5195835

persistent identifier

http://treatment.plazi.org/id/146C8794-FFF2-B93A-FF6F-A9F7FDE6F841

treatment provided by

Felipe

scientific name

Isoplastus fossor Horn, 1880
status

 

Isoplastus fossor Horn, 1880  

( Fig. 2 View Figures 1–6 , 17 View Figure 17 )

Isoplastus fossor Horn, 1880: 295   ; Brown 1937b: 174; Daffner 1988: 302. Lectotype male in MCZC, type number 3191, seen; designated by Daffner 1988: 302. Type locality: District of Columbia.

Isoplastus uncus Wheeler, 1977: 77   ; Daffner 1988: 302, synonymy. Type male in MCZC, type number 32322, seen. Type locality: Fortin de las Flores, Veracruz, Mexico   .

Diagnosis. Length (pronotum + elytra) = 1.18–2.00 mm; greatest width = 0.78–1.39 mm. Reddish brown, shiny. Head finely, sparsely punctate. Antennomere 2 clearly longer and broader than 3; antennomere 7 thin, about half width of 8; apical antennomere distinctly narrower than 9. Sides of pronotum rounded, posterior angles obtuse. Pronotum finely, sparsely punctate. Elytral strial punctures coarse, finer anteriorly, separated by one diameter or less, except anteriorly; interstrial punctures minute, sparse. Metasternum strongly, densely punctate. Legs as in generic diagnosis. Abdominal sternites III–VIII each with transverse row of small punctures on apical half; sternite III rugose. Median lobe of aedeagus ( Fig. 2 View Figures 1–6 ) broad, angled about 90 degrees in lateral view; paired apices each divided at tip. Parameres ( Fig. 2 View Figures 1–6 ) extend beyond apex of median lobe. Armature of inverted internal sac as in Fig. 2 View Figures 1–6 .

Distribution. North American distribution ( Fig. 17 View Figure 17 ): CANADA. ONTARIO, QUEBEC. UNITED STATES. ALABAMA, ARKANSAS, ARIZONA, DISTRICT OF COLUMBIA, FLORIDA, GEORGIA, INDIANA, KENTUCKY, LOUISIANA, MICHIGAN, MISSISSIPPI, NORTH CAROLINA, OKLAHOMA, SOUTH CAROLINA, TEXAS, VIRGINIA. Extra-limital distribution: Mexico (doubtful, see Remarks).

Previously recorded in North America ( Horn 1880, Brown 1937b, Daffner 1988) from: CANADA. ONTARIO. Arnprior. QUEBEC. Aylmer. UNITED STATES. MICHIGAN. Detroit. DISTRICT OF COLUMBIA.

Seasonality. Adults have been collected from February to November, and mostly in June to August, with the early and late season records from southerly locations in Florida and Texas.

Bionomics. Adults have been collected in habitats ranging from open pine forest and juniper thicket to mature mixed and bottomland beech-magnolia forest. Taken mostly by flight intercept traps but also by sweeping and ultraviolet light traps.

Remarks. We question the above synonymy and think it needs re-examination. We suspect that I. uncus   is actually a valid species, and we have seen several undescribed species of Isoplastus   from Mexico and southward.

New material examined. We have seen 434 specimens from the following localities. CANADA. ONTARIO. L3C6 Wolford Township, 44° 52’03”N, 75°43’50” W. Tilbury. UNITED STATES. ALABAMA. Dale Co. Ft. Rucker Military Reservation. Jefferson Co., Hoover. ARKANSAS. Little Rock Co., Little Rock. Logan Co., Magazine Mountain. ARIZONA. Cochise Co., Chiricahua Mts., Turkey Creek. FLORIDA. Alachua Co., Gainesville. 10 km SW Gainesville. Jackson Co., Marianna, Florida Caverns State Park. Sneads, Three Rivers State Park. Leon Co., 20 mi N Tallahassee, Tall Timbers Station. Liberty Co. 14 km N Bristol, Appalachicola Bluffs and Ravines Preserve. Suwanee Co., Suwanee River State Park. GEORGIA. Greene Co., Oconee National Forest. INDIANA. Tippecanoe Co. KENTUCKY. Edmonson Co., Mammoth Cave National Park. Metcalfe Co., 0.5 mi NE East Fork. LOUISIANA. Catahoula Parish, Walters, Catahoula National Wildlife Refuge. Grant Parish, 18 km N Alexandria, Stuart Lake Camp. Natchitoches Parish, Kisahatchie Bayou. West Feliciana Parish, Feliciana Preserve. MISSISSIPPI. Pontotoc Co., 32 km SW Tupelo, Tockshish. NORTH CAROLINA. Northampton Co., 7 km S Jackson. OKLAHOMA. Latimer Co., Red Oak. Wagoner Co., 3 mi W Wagoner. SOUTH CAROLINA Anderson Co., Pendleton. Oconee Co., 12 mi NE Walhalla. Pickens Co., Calhoun. TEXAS. Bell Co., 1 km W Youngsport. Brazos Co., Lick Creek Park, College Station. Ellis Co., 3.6 mi NW Italy. Hays Co., 6 mi NW Dripping Springs. 6.5 mi SW Hunt. Kerr Co., Kerrville. Montgomery Co., 4.5 mi N Montgomery. Polk Co., 20 km S Coldspring. Sabine Co., 9 mi E Hemphill, Beech Bottom. San Augustine Co., Piney Woods Conservation Center. San Jacinto Co., 5 km S Coldspring. Shelby Co., 20 km SE Shelby. Tyler Co., 5 mi E Spurger. Wood. Co., Godwin Woods, 3.5 mi SW Hainesville. VIRGINIA. Fredericksburg. Warren Co., 4 km NNW Linden.

Kingdom

Animalia

Phylum

Arthropoda

Class

Insecta

Order

Coleoptera

Family

Leiodidae

Genus

Isoplastus

Loc

Isoplastus fossor Horn, 1880

Peck, Stewart B. & Cook, Joyce 2013
2013
Loc

Isoplastus uncus

Daffner, H. 1988: 302
Wheeler, Q. D. 1977: 77
1977
Loc

Isoplastus fossor

Daffner, H. 1988: 302
Daffner, H. 1988: 302
Brown, W. J. 1937: 174
Horn, G. H. 1880: 295
1880