Operclipygus impositus, Caterino, Michael S. & Tishechkin, Alexey K., 2013

Caterino, Michael S. & Tishechkin, Alexey K., 2013, A systematic revision of Operclipygus Marseul (Coleoptera, Histeridae, Exosternini), ZooKeys 271, pp. 1-401 : 165-167

Operclipygus impositus sp. n. Figs 44 A–E45A–BMap 16

Type locality.

BRAZIL: Pará: km 18 Altamira - Marabá road [3°09'S, 52°03'W [

Type material.

Holotype male: "BRASIL: Pará: Altamira - Marabá: km 18, 3°09'S, 52°03'W. Piège de’interception. v.1984" / "Caterino/Tishechkin Exosternini Voucher EXO-00307" (UFPR). Paratypes (23): 1: same data as type(CHND); BRAZIL: Amapá: 3: Serra do Navio, 0°59'N, 52°00'W, 1-14.v.1991, FIT (CHND, MNHN); Mato Grosso: 1: Sinop, 11°49'S, 55°29'W, 12-24.vi.1985, FIT (CHND); Pará: 3: Tucuruí, 3°45'S, 49°40'W, 20. v– 15.vi.1987, FIT (CHND, FMNH), 1: iv.1986, FIT (CHND), 1: IPEAN, Utinga, Belém, 1°27'S, 48°26'W, v.1985, FIT (CHND), 2: viii.1985, FIT (CHND), 1: x.1985, FIT (CHND), 2: xi.1984, FIT (MSCC, CHND); 3: Carajás, Serra Norte, 6°04'S, 50°12'W, 13.xi-2.xii.1987, FIT (CHND, UFPR, AKTC); 5: Marajo-Breves, 0°53'S, 50°32'W, 18.xi-5.xii.1987, FIT (CHND, UFPR).

Other material

. 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:Res. Ethnica Waorani, 1km S Onkone Gare Camp, Trans. Ent., 0°39'10"S, 76°26'W, 220m, 16.i.1994, fogging, T.L. Erwin (USNM); 1: Yasuní Res. Stn., 215m, 5-10.ix.1999, FIT, primary forest, E.G. Riley (TAMU); 1: Tiputini Biodiversity Station, 0.6376°S, 76.1499°W, 4-9.vi.2011, FIT, M.S. Ca terino & A.K. Tishechkin, DNA Extract MSC-2190 (SBMNH); 1: 5-25.ix.2000, D.J. Inward & K.A. Jackson (BMNH); Sucumbíos: 2: Sacha Lodge, 0°28'14"S, 76°27'35"W, 270m, 21-24.iii.1999, FIT, R. Brooks (SEMC). FRENCH GUIANA: 1: Roura, 18.4km SSE, 4°36'38"N, 52°13'25"W, 240m, 29. v– 10.vi.1997, FIT, J. Ashe, R. Brooks (SEMC); 2: Saül, 7km N, Les Eaux Claires, 3°39'46"N, 53°13'19"W, 220m, 31. v– 3.vi.1997, FIT, J. Ashe, R. Brooks (SEMC); 1: Belvèdére de Saül, point de vue, 3°1'22"N, 53°12'34"W, 20.xii.2010, Window trap, SEAG (MNHN); 1: Rés. Natur. des Nouragues, Camp Inselberg, 4°05'N, 52°41'W, 25.i.2011, Window trap, SEAG (MNHN), 1: 9.xi.2010, Window trap, SEAG (MNHN). GUYANA: Mazaruni Potaro: 1: Takutu Mountains, 6°15'N, 59°5'W, 11.xii.1983, Window trap, montane rainforest near logging area, P.J. Spangler, R.A. Faitoute & W.E. Steiner (USNM); Region 8: 1: Iwokrama Forest, Turtle Mt. summit, 4°43'57"N, 58°44'1"W, 290m, 30. v– 1.vi.2001, FIT, R. Brooks & Z. Falin (SEMC). PERU: Junín: 1: 11km NE Puerto Ocopa, Los Olivos, 11°7.00'S, 74°15.52'W, 1200m, 24-26.iii.2009, Window trap, A.V. Petrov (AKTC), 1: 26-28.iii.2009, Window trap, A.V. Petrov (AKTC), 1: 30-31.iii.2009, Window trap, A.V. Petrov (MUSM); Loreto: 1: 68km SW Iquitos to Nauta, Rio Itaya, 4°11'S, 73°26'W, 110m, 28.ii.2008, A.V. Petrov (AKTC), 1: 1-3.iii.2008, A.V. Petrov (MUSM). SURINAME: Brokopondo: 1: Brownsberg Nature Preserve, Witi Creek Trail, 4°56'55"N, 55°10'53"W, 480m, 23-25.vi.1999, FIT, Z. Falin, A. Gangadin, H. Hiwat (SEMC); Marowijne: 1: Nassau Mountain, 4°48'36"N, 54°31'16"W, 500m, 2-4.vi.1999, FIT, Z. Falin, B. DeDijn (SEMC); Para: 1: nr. Overbridge River Resort, 5°31.8'N, 55°3.5'W, 15-18.ii.2010, FIT, C. Gillet, P. Skelley, W. Warner (FSCA).

Diagnostic description.

Length: 1.22-1.40 mm, width: 0.84-0.97 mm; body rufobrunneus, elongate, sides subparallel, depressed; frons weakly depressed at middle, frontal stria complete, sinuate, slightly recurved at middle; supraorbital stria complete, meeting sides of frontal stria; epistoma broad, sides rounded, emarginate across anterior margin; labrum half as long as wide, straight across apical margin; left and right mandibles both with acute basal tooth; pronotal disk with linear prescutellar impression about 1.5 × as long as scutellum; lateral submarginal pronotal stria absent, anterior marginal stria interrupted behind head; anterior submarginal stria strongly recurved posterad, reaching pronotal midpoint; median pronotal gland openings along side base of recurved arms of anterior stria, about 4 puncture widths from anterior margin; elytra with 1 complete epipleural stria, outer subhumeral stria present in apical half, inner subhumeral stria absent, striae 1-4 complete, 5th stria present in apical half, sutural stria present in apical three-fourths; prosternal keel with base produced, rounded, carinal striae long, close and subparallel in anterior three-fourths, united in narrow anterior arch, separate basally; mesoventrite emarginate anteriorly, marginal stria interrupted; mesometaventral stria narrowly arched forward to near margin, sinuate laterally, continued by lateral metaventral stria to near middle of metacoxa; 1st abdominal ventrite with two complete lateral striae; propygidium (Fig. 45B) with sparse fine ground punctation, small round coarser punctures uniformly separated by about their diameters; pygidium with fine, dense ground punctation, with distinct coarser punctures densely interspersed, especially near basal margin; marginal pygidial sulcus complete, deep, strongly crenulate on inner and outer edges. Male genitalia (Figs 44 A–E): accessory sclerites present; T8 elongate, sides slightly convergent to apex, basal emargination shallow, narrow, basal membrane attachment line distad emargination by nearly its depth, apical emargination narrow, shallow, ventrolateral apodemes most strongly developed at base, nearly meeting at midline, narrowed to apex; S8 short, widest at base, sides weakly rounded, apical guides developed throughout length, widened gradually to apex, apices subacute in outer corners, halves separate, strongly divergent in apical half; T9 with sides subparallel in basal two-thirds, convergent to narrow, obliquely truncate apices; T10 with halves separate; S9 broad, weakly desclerotized along midline, narrowest at middle, strongly widened to broadly rounded base, lateral flanges wide, apex with small median emargination, apical flanges short, separate; tegmen widest just beyond midpoint, narrowing to subacute base, becoming quite flat dorsoventrally, curving downward toward apex, with wide ‘V’ -shaped medioventral process strongly projecting beneath about one-third from base; basal piece nearly half tegmen length; median lobe over half tegmen length, with proximal apodemes not strongly differentiated, proximal portions conspicuous.

Remarks.

In general body shape (Fig. 45A) this species strongly resembles members of the Operclipygus dubius group. However, its male genitalia absolutely preclude placement there. This species can be distinguished by its lack of lateral submarginal pronotal stria, and by its elongate, subcylindrical body shape. It is very similar to the sympatric Operclipygus minutus , but is more distinctly parallel-sided and subdepressed, and has entirely different genitalia, lacking the truncate medioventral process and subapical tegmenal cleft characteristic of that species and several close relatives. The type series is limited to those specimens from northeastern Brazil, as populations from other areas do exhibit some variation, some with anterior fragments of the lateral submarginal pronotal stria.

Etymology.

The Latin name impositus is related to the English impostor, as this species looks very much like members of the Operclipygus dubius species group.