provided by Smithsonian Contributions to Zoology
Ataenius abditus (Haldeman)
Aphodius (Oxyomus) abditus Haldeman, 1848:106.
Ataenius abditus.—Harold, in Gamminger and Harold, 1869:1066.—Horn, 1875:142; 1887:72.—Schmidt, 1922:149.
Ataenius attenuator Harold, 1874:22.—Horn, 1875:142.
DESCRIPTION.—Length 3.3 to 4.0 mm; width 1.4 to 1.5 mm. Black or brownish black, elongateparallel, only moderately convex, weakly shining. Head moderately convex; clypeus broadly, shallowly emarginate with a small, sharp tooth each side of emargination, anterior third strongly shining and transversely rugose, the rugae not over greatest clypeal convexity which is very finely, closely, distinctly punctate, the punctures gradually larger upward over front and occiput; margin of clypeus very finely reflexed, sides weakly arcuate before genae, genae not prominent, approximately right-angled. Pronotum nearly rectangular from directly above, from the side posterior angles broadly rounded; lateral and basal margin apparently entire but very finely crenate with widely spaced, extremely short, minute setae under high magnification; surface densely, moderately, uniformly punctate everywhere, slightly closer laterally, especially in the anterior angles where the punctures tend to coalesce. Elytra microreticulate, humeri finely dentate, striae fine, deeply, finely punctate, intervals very moderately convex, the lateral intervals more noticeably roughened by microreticulate or alutaceous sculpture and an outside row of fine punctures, humeri noticeably alutaceous, sutural intervals with row of close, fine punctures, striae noticeably widened over posterior declivity, lateral margin and intervals over declivity show very minute, short, closely spaced setae under high magnification. Mesosternum shagreened, with moderately dense, short, decumbent, fine hairs; strongly carinate between the coxae. Metasternum with strong, deep midline; flattened discal area moderately, closely punctate, punctures separated by about their diameter, the punctures extending out laterally to the finely scabriculate area of the outer third, metasternal triangle deep and scabriculate within. Abdominal sterna moderately, closely, shallowly, uniformly punctate from side to side, finely, very closely fluted along anterior margin. Pygidium medially eroded and alutaceous, bordered by shiny posterior margin. Anterior femora with perimarginal groove, surface moderately, closely punctate. Middle femora with moderate punctures throughout separated by about their diameter, deep posterior marginal line inward from knee over half length of femur. Posterior femora more finely punctate, the punctures separated by two or more times their diameter, and posterior femoral line short, about equal to width of femur at knee; tibia without accessory spine, terminal fimbriae 8 to 10 in number, first tarsal segment slightly shorter than long spur and equal to following three segments combined.
HOLOTYPE.—Museum of Comparative Zoology, in LeConte collection, No. 8359.
TYPE-LOCALITY.—“Middle States” (i.e., Middle Atlantic States).
SPECIMENS EXAMINED.—325 +.
DATES COLLECTED.—March 20 to November 3.
DISTRIBUTION (Figure 12).—District of Columbia. Florida: Neshamy. Georgia: Alapaha River (17 mi E of Nashville), Athens (Horshoe Bend, Clarke County). Illinois: Riverside. Indiana: Kosciusko County, Lake County, Porter County, Tippecanoe County. Kentucky: Cumberland Falls (Whitley County), Summit. Maryland: Anne Arundel County (S. I. Java Farm), Baltimore, Beltsville, Chesapeake Beach, College Park, Kenwood Beach, Laurel, Marlboro, Marshall Hall, Plummers Island, Takoma Park. Massachusetts: Amherst. Michigan: Detroit, Isabella County, La Salle, Midland County, Monroe, Port Huron. Mississippi: Greenwood, Gulfport, Lucedale. New Hampshire: Wentworth. New Jersey: Atko, Ballingers Mill, Camden, Colonia, Hadden Heights, Hartford, Hillsdale, Lavalette, Phillipsburg, Westville. New York: Douglaston (Long Island), Peekskill, Staten Island. North Carolina: Balsam, Black Mountain, Edenton, Highlands, Hot Spring (French Broad River), Looking Glass Mts., Melrose, Mitchell County, Pisgah National Forest, Raleigh, Retreat, Sunburst. Ohio: Hocking County, Ottawa County, Schoenbrun (Tuscarawas County), Toledo. Pennsylvania: Jeannette, Manayvick, Pittsburgh. South Carolina: Aiken, Anderson County, Belton, Cayce, CCC Camp No. 2, Clemson, Columbia, Eastatoe River, Edgefield, Greenville County, Hampton, Jenkinsville, Jocassee, Marion, Salem, Sandy Springs, Sassafras Mtn., Summerville, Walhalla. Tennessee: Central, Cummins Mill (Jackson County), Green Branch Cove (Great Smoky Park). Vermont: Duxbury (Winooski River), Jonesville (Winooski River). Virginia: Fairfax, Falls Church, Fort Monroe. West Virginia: White Sulphur Springs. Canada: Ontario: Hemmingford, La Salle, Lexington, Long Point, Point Pelee, Tilbury, Toronto, Turkey Point. New Brunswick: French Lake.
- bibliographic citation
- Cartwright, Oscar Ling. 1974. "Ataenius, Aphotaenius, and Pseudataenius of the United States and Canada (Coleoptera: Scarabaeidae: Aphodiinae)." Smithsonian Contributions to Zoology. 1-106. https://doi.org/10.5479/si.00810282.154