Operclipygus tiputinus, 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 : 134-136

Operclipygus tiputinus sp. n. Figs 35 E–FMap 13

Type locality.

ECUADOR: Orellana: Yasuní Research Station [0°40.5'S, 76°24'W].

Type material.

Holotype male: "Ecuador: Napo, mid.Rio Tiputini, Yasuní Res. Stn. 0°40.5'S, 76°24'W, FIT#M2 20-29 Jun 1999. CEC#030 C.Carlton & V.Moseley" / "LSAM 0013234" / " Operclipygus sp #11, Hist 132, Yasuní NP Inventory A.K.Tishechkin det 2010" (FMNH). Paratypes (22): ECUADOR: Orellana: 1:Parque Nac. Yasuní, Via Maxus at Puente Piraña, 0°39.5'S, 76°26'W, 14-20.vii.2008, FIT, A.K. Tishechkin (AKTC); 2: Tiputini Biodiversity Station, 0.6376°S, 76.1499°W, 4 -9.vi.2011, FIT, M.S. Caterino & A.K. Tishechkin, DNA Extracts MSC-2183 & MSC-2288 (SBMNH), 10: 2-9.vi.2011, FIT, M.S. Caterino & A.K. Tishechkin (SBMNH, FMNH, AKTC, MSCC, CHND, USFQ), 1: 5-25.ix.2000, D.J. Inward & K.A. Jackson (BMNH), 2: 27-31.vii.2008, FIT, A.K. Tishechkin (LSAM); Napo: 2: 20 km S Tena, 600m, 11.vii.1976, Berlese, forest litter, S. Peck (FMNH).

Other material.

COLOMBIA: Vaupés: 2: Est. Biol. Caparú, Rio Apoporis, 1.1°S, 69.5°W, 27. ix– 1.xii.1995, FIT, Black-water terrace forest on sandy soils, B.D. Gill (BDGC); 2: Parque Nac. Mosiro-Itajura ( Caparú), Centro Ambiental, 1°04'S, 69°31'W, 60m, 20-30.i.2003, FIT, D. Arias & M.Sharkey (IAVH). FRENCH GUIANA: 1: Cayenne, 33.5km S and 8.4km NW of Hwy N2 on Hwy D5, 4°48'18"N, 52°28'41"W, 30m, 29. v– 9.vi.1997, FIT, J. Ashe, R. Brooks (SEMC); 4: Mont Tabulaire, Itoupé, 3°1.82'N, 53°6.40'W, 400m, 17.iii.2010, Window trap, SEAG (CHND), 1: 23.iii.2010, Window trap, SEAG (CHND); 2: Rés. Natur. des Nouragues, Camp Inselberg, 4°05'N, 52°41'W, 22.ix.2010, Window trap, SEAG (MNHN); 1: Belvèdére de Saül, point de vue, 3°1'22"N, 53°12'34"W, 10.xii.2010, Window trap, SEAG (CHND). GUYANA: Mazaruni Potaro: 3: 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). PERU: Junín: 1: 11km NE Puerto Ocopa, Los Olivos, 11°3.00'S, 74°15.52'W, 1200m, 26-30.iii.2009, fig fruitfall, A.K. Tishechkin, DNA Extract MSC-2228 (AKTC); Loreto: 1: 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), 2: 23.vii.1993, FIT, R. Leschen (SEMC), 1: 26.vii.1993, FIT, R. Leschen (SEMC), 1: 28.vii.1993, FIT, R. Leschen (SEMC). SURINAME: Sipaliwini: 2: CI-RAP Surv. Camp 3: Wehepai SE Kwamala, 2°21.776'N, 56°41.861'W, 237m, 3-7.ix.2010, FIT, T. Larsen & A.E.Z. Short (SEMC); 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 & A.E.Z. Short (SEMC); 1: CI-RAP Surv. Camp 1: on Kutari River, 2°10.521'N, 56°47.244'W, 228m, 19-24.viii.2010, FIT, T. Larsen & A.E.Z. Short (SEMC).

Diagnostic description.

Length: 1.25-1.50 mm, width: 1.00-1.15 mm; frons flat to convex, frontal stria complete, more or less transverse across front, not displaced dorsad, antennal bases not particularly prominent; epistoma weakly depressed in middle, narrowly convex along anterior margin; labrum about twice as wide as long, straight across apical margin; pronotal disk with narrow prescutellar impression about 1.5 × length of scutellum; ground punctation of pronotal disk fine and sparse, slightly more strongly impressed toward sides, with few (<8) small secondary punctures at sides; lateral submarginal pronotal stria complete, curving inward in front and ending freely; anterior submarginal pronotal stria recurved posterad at sides about one-third length of pronotal disk; median pronotal gland openings close, laterad anterior submarginal stria, sometimes disrupting its path, about 6 puncture widths from anterior margin; elytra with outer subhumeral stria present in apical half, inner subhumeral stria absent, 1st stria complete to base, tending toward obsolete in apical fourth, striae 2-3 complete, 4th stria varied, from present in only apical half to very nearly complete, 5th stria present in apical half, sutural stria present in apical three-fourths; prosternal keel produced at base, carinal striae present in basal three-fourths of keel, slightly divergent and separate at base, united anteriorly; mesoventrite emarginate anteriorly, with complete marginal stria; mesometaventral stria broadly angulate forward to middle of mesoventral disk, continued by lateral metaventral stria extending posterolaterally toward posterior corner of metepisternum; 1st abdominal ventrite with inner lateral stria weakly abbreviated apically, outer complete, parallel; propygidium with very fine, sparse ground punctures and small, round, shallow punctures separated by about 1.5 × their diameters; pygidium with fine, dense ground punctures only, lacking coarser punctures, even along basal margin; marginal pygidial sulcus fine, shallow, frequently obsolete toward basal corners. Male genitalia indistinguishable from those of Operclipygus subterraneus (see Figs 36 F–H).

Remarks.

The small size of this species, along with its pygidium (Fig. 35F), with only fine ground punctation, and having a fine, often basally abbreviated marginal sulcus, will adequately diagnose this species. The body outline (Fig. 35E) may appear interrupted at the humeri, which are generally more broadly rounded than the sides of the pronotum. The type series is limited to a relatively restricted area in eastern Ecuador, as some variation among localities is evident.

Etymology.

This species is named for the type locality's region, along the Rio Tiputini, in Amazonian Ecuador.