Operclipygus striatellus (Fall, 1917) Fall, 1917

Caterino, Michael S. & Tishechkin, Alexey K., 2013, A systematic revision of Operclipygus Marseul (Coleoptera, Histeridae, Exosternini), ZooKeys 271, pp. 1-401 : 302-304

Operclipygus striatellus (Fall, 1917) comb. n. Figs 80 B–C81E–F, IMap 29

Tribalister striatellus Fall, 1917: 165.

Type locality.

Not specified beyond Rhode Island State, USA.

Type material.

Holotype: “R.I.” / "N.B.X. p.31" / "TYPE striatellus" / "H. C. FALL COLLECTION" / "M.C.Z. Type 24127" / "Aug.-Dec.2004 MCZ Image Database" (MCZC), examined 2012.

Other material.

USA: Iowa: 1: Allamakee Co., Fish Farm Mounds Wildlife Area, 43°27'23"N, 91°16'43"W, 11.vi.2005, J.P. Gruber, in nest Aphaenogaster sp., under rock on bluff prarie (CHJG); 1: Dubuque Co., Kaufmann Avenue Prarie, 42°30'54"N, 90°40'40"W, 16.vi.2003, J.P. Gruber, in nest Aphaenogaster sp., under rock on bluff prarie (CHJG). Indiana: 1: Porter Co., Indiana Dunes N. L., Inland Marsh, 15.ix-18.x.1995, R. Grundel, unbaited pitfall trap (CHPWK). Minnesota: 1: Houston Co., Mound Prarie SNA, 43°45'54"N, 91°25'51"W, 11.vi.2003, J.P. Gruber, in nest of Aphaenogaster sp., under rock on bluff prarie; (CHJG) 2: Mound Prarie SNA, 43°46'00"N, 91°25'27"W, 11.vi.2003, J.P. Gruber, in nest Aphaenogaster sp., under rock on bluff prarie (CHJG). Wisconsin: 1: Columbia Co., Rocky Run Ck. SFA, 43°27'38"N, 89°19'31"W, 21.vi.2009, J.P. Gruber, beaten from Quercus sp. (CHJG), 1: 21.vi.2009, J.P. Gruber, in nest Aphaenogaster sp., under wood on ground, hardwood forest/savanna (CHJG), 1: 23.vii.2008, J.P. Gruber, in nest Aphaenogaster sp., hardwood forest/savanna (CHJG); 1: Crawford Co., Hogback Prarie SNA, 43°13'03"N, 90°52'36"W, 16.vi.2001, J.P. Gruber, in nest Aphaenogaster sp., under rock on bluff prarie (CHJG), 1: 23.vi.2002, J.P. Gruber, being carried by worker Aphaenogaster sp.; 43°12'50"N, 90°52'19"W (CHJG), 1: 17.VI.2005, J. Gruber & P. Kovarik, Aphenogaster sp. nest (CHPWK); Crawford Co., Rush Creek SNA, 43°22'04"N, 91°08'15"W, 11.vi.2005, J.P. Gruber, in nest Aphaenogaster sp., under rock on bluff prarie (CHJG); 1: Monroe Co., Ft. McCoy Sand Quarry, T17N R3W sec2, 18.vi.1999, J.P. Gruber, in sand in mammal burrow opening, prarie/oak savanna (CHJG); 1: Trempealeau Co., Brady's Bluff Prarie SNA, 44°00'57"N, 91°28'34"W, 11.vi.2003, J.P. Gruber, in nest Aphaenogaster sp., under rock on bluff prarie (CHJG); 3: Grant Co., Dewey Heights Prarie SNA, 42°44'02"N, 91°01'02"W, 9.vi.2003, J.P. Gruber, in nest Aphaenogaster sp., under rock on bluff prarie (CHJG, MSCC: DNA Extract MSC-0132); 1: Sauk Co., Spring Green Preserve SNA, 43°12'22"N, 90°03'32"W, 22.vii.2012, J.P. Gruber, in nest Aphaenogaster sp., under rock on bluff prarie (CHJG). Louisiana: 1: West Feliciana Parish, Feliciana Preserve, 30°47'N, 91°15'W, 18.v.1999, J. Fassbender, Berlese, forest litter, 1: 1-29.iv.2001, A. Cline, FIT (AKTC), 3: 29. iv– 24.v.2001, A.R. Cline, FIT (AKTC, LSAM), 1: 24.v.-2.vi.2001, A.R. Cline, FIT (LSAM), 2: 2-15.vi.2001, A.R. Cline & A.K. Tishechkin, FIT (AKTC, LSAM), 1: 7.vii.-22.ix.2001, A.R. Cline & A.K. Tishechkin, FIT (LSAM), 1: 7.iii.-23.v.2004, A.K. Tishechkin, FIT (LSAM); 1: West Feliciana Parish, Tunica Hills WMA West of Weyanoke, 3.v.1985, C. Barr (LSAM). CANADA: 1: Ontario Mississauga, 22.vi.1979, A. Francoeur ( Bousquet and Laplante 2005).

Diagnostic description.

Length: 1.56-1.93 mm, width: 1.34-1.62 mm; body rufescent, elongate oval, with rather conspicuous ground punctation and sparse patches of granulate microsculpture; frons broad, depressed at middle, sides of frontal stria rounded, slightly sinuate above antennal bases, complete, weakly arcuate dorsad across front; apical margin of epistoma weakly emarginate; labrum about 2.5 × as wide as long, weakly emarginate apically; left mandible bluntly produced along inner edge, right mandible with more discrete, acute tooth; pronotum lacking prescutellar impression or lateral punctures; marginal pronotal stria continuous along lateral and anterior edges; lateral submarginal pronotal stria complete, close to margin, subcarinate, continuous with anterior submarginal stria, pronotal disk depressed along their inner edges; median pronotal gland openings distinctly annulate, located about two-thirds pronotal distance behind anterior margin; elytron with two complete epipleural striae, outer subhumeral stria weakly carinate, forming weak lateral elytral margin continuous with lateral pronotal margin, inner subhumeral stria absent, dorsal striae 1-5 complete, faintly carinate along their outer edges, sutural stria obsolete in basal fourth, all striae converging toward midline apically; elytral disk with numerous coarse punctures near apical margin; prosternal keel truncate at base, carinal striae complete, divergent basally, free basally and apically; prosternal lobe very short, marginal stria weak; mesoventrite truncate along anterior margin, with marginal stria very close to margin; mesometaventral stria broadly arched forward to anterior mesoventral margin, continued by lateral metaventral stria which extends laterally, close and parallel to postmesocoxal stria, strongly abbreviated at midpoint; metaventrite moderately convex; 1st abdominal ventrite depressed, especially at sides along complete inner lateral stria; propygidium uniformly and densely covered with coarse punctures; pygidium with fewer and sparser punctures, mainly at sides, impunctate toward apex; marginal pygidial sulcus well impressed along most of margin, obsolete toward base. Male genitalia extremely similar to those of Operclipygus marginellus (see Fig. 81), differing as follows: T8 (Fig. 81I) slightly more elongate, evenly narrowed to apex; S8 (Fig. 81F) shorter, sides convergent to apex, with narrow apical guides developed only near apex; S9 (Fig. 81E) with base more broadly expanded; aedeagus indistinguishable.

Remarks.

See diagnosis under Operclipygus marginellus , above.