Operclipygus depressus (Hinton, 1935)

Caterino, Michael S. & Tishechkin, Alexey K., 2013, A systematic revision of Operclipygus Marseul (Coleoptera, Histeridae, Exosternini), ZooKeys 271, pp. 1-401 : 80-81

Operclipygus depressus (Hinton, 1935) Figs 19 E–F 20GMap 7

Pseudister depressus Hinton, 1935: 584; Operclipygus depressus : Wenzel (1976: 257).

Type locality.

FRENCH GUIANA:Saint-Laurent du Maroni [5°30'N, 54°2'W].

Type material.

Lectotype, here designated (BMNH): "Guyane Francse., St-Laurent du Maroni, Collection Le Moult" / "G.Lewis Coll. B.M.1926-369" / "LECTOTYPE Pseudister depressus Hinton, 1935, M.S.Caterino & A.K.Tishechkin des. 2010", somewhat damaged (BMNH). This species was described from an unspecified number of specimens, and the lectotype designation fixes primary type status on the only known original specimen.

Other material.

1: BOLIVIA: Santa Cruz: Amboro National Park, Los Volcanes, 18°06'S, 63°36'W, 1000m, 20. xi– 12.xii.2004, FIT, Mendel, H. & Barclay, M.V.L. (BMNH). BRAZIL: Pará: 1: Tucuruí, 3°45'S, 49°40'W, iv.1986, FIT (CHND), 3: v.1986, FIT (CHND), 2: 19. vi– 7.vii.1986, FIT (CHND), 2: 20. v– 15.vi.1987, FIT (CHND); Carajás (Serra Norte), 6°04'S, 50°12'W, xi.1984, FIT (CHND). COLOMBIA: Vaupés: 1: Parque Nac. Mosiro-Itajura ( Caparú), Centro Ambiental, 1°04'S, 69°31'W, 60m, 20-30.i.2003, FIT, D. Arias & M. Sharkey (IAVH). ECUADOR: Orellana: 1: Tiputini Biodiversity Station, 0.6376°S, 76.1499°W, 4-9.vi.2011, FIT, M.S. Caterino & A.K. Tishechkin (SBMNH) DNA Extract MSC-2177; 1: Tiputini Biodiversity Station, 0°37'44"S, 76°08'39"W, 220-250m, 26.x.1998, fogging, T.L. Erwin (USNM); 1: Res. Ethnica Waorani, 1km S Onkone Gare Camp, Trans. Ent., 0°39'10"S, 76°26'W, 220m, 8.ii.1995, fogging, T.L. Erwin (USFQ); 2: Parque Nac. Yasuní, Via Maxus at Puente Piraña, 0°39.5'S, 76°26'W, 14-20.vii.2008, FIT, A.K. Tishechkin (AKTC); Zamora Chinchipe: 1: Yanzatza at Rio Yanzatza, 7.xi.1979, inflorescence of Heliconia , Jos. J. Anderson (USNM). FRENCH GUIANA: 13: Mont tabulaire Itoupé, 3°1.38'N, 53°5.73'W, 570m, 17.iii.2010, FIT, SEAG (CHND), 16: 570m, 24.iii.2010, FIT, SEAG (CHND), 1: 400m, 23.iii.2010, FIT, SEAG (CHND), 14: 570m, 31.iii.2010, FIT, SEAG (CHND); 1: Montagne des Chevaux, 4°43'N, 52°24'W, 16.xii.2008, FIT, SEAG (MNHN); 1: 65 (Cayenne-Kourou) lieu-dit Tibourou, 20.ix.2008, FIT, J. Touroult (CHND); 1: Rés. Natur. des Nouragues, Camp Inselberg, 4°05'N, 52°41'W, 25.i.2011, Window trap, SEAG (MNHN), 2: 31.iii.2011, Window trap, SEAG (MNHN). GUYANA: Region 8: 2: Iwokrama Forest, Pakatau hills, 4°44'54"N, 59°1'36"W, 70m, 25-29.v.2001, FIT, R. Brooks & Z. Falin (SEMC); 3: Kurupukari, 4°40'N, 58°40'W, ix-xi.1992, malaise/FIT (BMNH); 1: 26.x.1992, FIT (BMNH). PERU: Loreto: 1: km 63, rd. Iquitos - Nauta, Rio Itaya, 4°15.205'S, 73°26.074'W, 140m, 9-13.i.2011, A.V. Petrov (AKTC); 5: 1.5km N Teniente Lopez, 2°35.66'S, 76°06.92'W, 210-240m, 18.vii.1993, FIT, R. Leschen (SEMC); 3: 20.vii.1993, FIT, R. Leschen (SEMC). SURINAME: Sipaliwini: 1: CI-RAP Surv. Camp 2: Sipaliwini River, 2°10.521'N, 56°47.244'W, 210m, 27.viii-1.ix.2010, FIT, T. Larsen & amp; A.E.Z. Short (SEMC); Para, 1:near Overbridge, 05°31'10"N, 55°04'10"W, 10-14.ii.2010, FIT, W.B. Warner (WBWC). VENEZUELA: Amazonas: 1: Cerro de la Neblina Basecamp, 0°50'N, 66°10'W, 140m, 26-31.i.1985, FIT, P.J. & P.M. Spangler, R.A. Faitoute, W.E. Steiner colrs. (USNM); Bolívar: 1:6km S San Iisidro, Km 88, 25. vi– 11.vii.1987, FIT, lowland rain forest, S. & J. Peck (FMNH).

Diagnostic description.

This species is extremely similar to Operclipygus sejunctus , differing only in a few characters as follows: length: 1.90-2.40 mm, width: 1.59-2.09 mm; body uniformly rufo-piceous; frons with frontal stria nearly complete, only very narrowly interrupted above antennal bases; supraorbital stria interrupted across vertex; pronotum with lateral submarginal stria complete, distance from margin slightly increasing toward front; elytra somewhat variable, generally as in Operclipygus juninensis , sutural stria frequently longer than in Operclipygus sejunctus , present on apical two-thirds to three-fourths; coarser elytral punctures densest at apex, but with few coarse punctures extending up the apical third of interstriae; sterna as in Operclipygus pecki and Operclipygus juninensis , mesoventral disk rarely with few coarse punctures at sides; metaventral disk with strong ground punctation, coarser punctures gradually becoming larger and denser toward metacoxae; secondary lateral metaventral stria generally very short; propygidium and pygidium as in Operclipygus sejunctus . Male genitalia (Fig. 20G): T8 relatively short, basal membrane attachment line just intersecting basal emargination in some specimens; S8 with halves approximate but separate throughout length; S9 with apical emargination very small or lacking, lateral flanges narrow; tegmen with sides more or less straight, widest about two-thirds from base, evenly narrowed to base, somewhat abruptly narrowing in apical third, with apices narrowly rounded, medioventral process narrow, acute, about one-third from base, weakly projecting beneath; median lobe about one-fourth tegmen length.

Remarks.

Operclipygus depressus has the pronotal marginal bead rather convex (Fig. 19E), and widening toward the front, as is also distinct in the following two species. The male metaventrite is not depressed setose (as is the case in Operclipygus setiventris ), and the 4th dorsal elytral stria is complete (abbreviated in Operclipygus itoupe ). Females of Operclipygus depressus and Operclipygus setiventris may not be consistently distinguishable.