Operclipygus profundipygus, 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 : 347-350

Operclipygus profundipygus sp. n. Figs 95 D–E96C–D, F, HMap 33

Type locality.

GUYANA: Region 8: 1 km W Kurupukari, Iwokrama Field Station [4°40.32'N, 58°41.07'W].

Type material.

Holotype male: "GUYANA: Region 8, Iwokrama Forest, 1 km W Kurupukari, Iwokrama Forest Field Stn., 60 m, 4°40'19"N, 58°41'4"W, 20-25 MAY 2001 R. Brooks,Z.Falin GUY1BF01 034 ex: flight intercept trap"/ "SM0566205 KUNHM-ENT" (SEMC). Paratypes (29): BRAZIL: Pará: 4: Abaetetuba, 1°42'S, 48°54'W, 26. xi– 7.xii.1993, FIT (CEMT, FMNH); 1:Altamira - Marabá: km 18., 3°09'S, 52°03'W, v.1985, FIT (CHND); 1: Tucuruí, 3°45'S, 49°40'W, 6-17.vi.1986, FIT (CHND). GUYANA: Region 8: 2: Iwokrama Field Stn., Iwokrama Forest, 1km W Kurupukari, 4°40'19"N, 58°41'4"W, 60m, 21.v.2001, Acromyrmex refuse pile, R. Brooks & Z. Falin (SEMC), 3: 26-29.v.2001, FIT, R. Brooks & Z. Falin (SEMC), 1: 20-25.v.2001, FIT, R. Brooks & Z. Falin (SEMC); 5: Kurupukari, 4°40'N, 58°40'W, ix-xi.1992, malaise/FIT (BMNH). FRENCH GUIANA: 1: Montjoly, 4°55'N, 52°16'W, xii.1977, banana trap (CHND). SURINAME: Marowijne: 1: Perica, 70km E. Paramaribo on East-West Road, 5°40'28"N, 54°36'31"W, 5m, 29-31.v.1999, FIT, Z. Falin, B. DeDijn (SEMC), 3: 31. v– 5.vi.1999, FIT, Z. Falin, B. DeDijn (SEMC), 2: 5m, 31.v.1999, FIT, Z. Falin (MSCC, AKTC); Sipaliwini: 2: 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); 2: upper Palumeu, 225m, 2.47700°N, 55.62941°W, CI-RAP Survey camp 1, FIT, 10-16.iii.2012, A.E.Z. Short (MSCC); 1: Wanaboo (near Nason), Marowijne River, 4°43'35"N, 54°26'36"W, 40m, 31. v– 5.vi.1999, FIT, Z. Falin, B. DeDijn (SEMC); Wanica: 1: Paramaribo, 12km S. on I. Ghandiweg, and 4.5km W on Mijnzorgweg, 5°43'55"N, 55°15'7"W, 10m, 6-7.vi.1999, FIT, Z. Falin, B. DeDijn (SEMC).

Other material. BOLIVIA: Beni: 1: Chacobo Indian Village on Rio Benicito, 12°20'S, 66°W, 18-27.vii.1960, under tapir dung, B. Malkin (FMNH), 1: 31.vii-2.viii.1960, B. Malkin (FMNH). ECUADOR: Orellana: 1: Yasuní Res. Stn., 00°40'28"S, 76°38'50"W, 215m, 5-10.ix.1999, FIT, Primary forest, E.G. Riley (LSAM); 1: P.N. Yasuní, Via Maxus at Puente Piraña, 0°39.5'S, 76°26'W, 20-24.vii.2008, FIT, A.K. Tishechkin (AKTC). PERU: Loreto: 3: Iquitos, 90m, 7.v.1992, FIT, J. Danoff-Berg (SEMC); Madre de Dios: 1: Amazonas Lodge, N Atalaya, 12°52.2'S, 71°22.6'W, 480m, 10-13.xi.2007, FIT, D. Brzoska (SEMC); 2: Tambopata, Reserva Cuzco Amazonico, 15km NE Pto. Maldonado, 12°33'S, 69°03'W, 200m, 16.vii.1989, FIT, J. Ashe & R. Leschen (SEMC), 2: 13.vii.1989, FIT, J. Ashe & R. Leschen (SEMC), 1: 20.vi.1989, FIT, J. Ashe & R. Leschen (SEMC), 1: 22.vi.1989, FIT, J. Ashe & R. Leschen (CHSM), 1: 26.vi.1989, FIT, J. Ashe & R. Leschen (CHSM); 1: Manu National Park, Cocha Salvador, 12°0'13"S, 71°31'36"W, 310m, 20-21.x.2000, FIT, R. Brooks (SEMC).

Diagnostic description.

Length: 1.75-1.90 mm, width: 1.47-1.59 mm; body rufo-brunneus, elongate oval, widest at humeri, prothorax rather broad, narrowing more conspicuously posterad; frons weakly depressed at middle, often with microsculpture within depression; frontal stria with sides divergent between eyes, broadly outwardly arcuate across front, continuous with complete supraorbital stria; labrum about two-thirds as long as broad, apical margin straight; left mandible untoothed, right with acute basal tooth; pronotum with sides weakly arcuate, convergent; pronotal disk with distinct narrow, sublinear prescutellar impression; pronotal disk with ground punctation fine, with ~15-20 coarser punctures toward sides; lateral marginal pronotal stria complete at side, ending just mesad anterior corner; lateral submarginal stria complete at side, extending forward to anterior margin, replacing marginal for a short distance, ending behind eye, slightly overlapping end of anterior submarginal stria, which is briefly recurved posterad at sides; central portion of anterior pronotal margin weakly projecting; median pronotal gland openings situated laterad ends of anterior submarginal stria; elytron swollen laterad 1st dorsal stria, with one complete epipleural stria, outer subhumeral in posterior half to two-thirds, inner subhumeral stria absent, striae 1-4 complete, 5th stria present in apical half and with a large basal puncture; sutural stria present in apical three-fourths, widened toward base; prosternal keel rounded, produced at base, with carinal striae sinuately convergent to front, united just short of presternal suture; prosternal lobe with marginal stria more or less complete; mesoventrite emarginate anteriorly, with complete marginal stria; mesometaventral stria arched forward just beyond mesoventral midpoint, continued at sides by lateral metaventral stria, which extends toward middle of metacoxa; 1st abdominal ventrite with two complete lateral striae on each side; propygidium with fine, dense ground punctation at sides, with small, deep, coarse punctures densely clustered in middle two-thirds; pygidium with fine, dense ground punctures throughout, with slightly larger punctures generally sparse, but concentrated along basal margin and toward apex of disk; apical marginal sulcus complete, deep and coarse. Male genitalia (Figs 96 C–D, F, H): accessory sclerites present; T8 with sides convergent from base to apex, basal emargination rather narrowly angulate, basal membrane attachment line distad by about half basal emargination's depth, apical emargination narrow, ventrolateral apodemes subacute ventrally, nearly meeting at middle; S8 with apical guides well developed, consistent in width throughout length, apices very slightly divergent, ventral halves fused for most of their length; T9 with apices narrow, slightly convergent; T10 with halves separate along midline; S9 rather narrow, weakly widened to rounded base, apex concave, but without median emargination, apical flanges continuous; tegmen short with sides strongly rounded, narrow at base, medioventral process weak, ‘U’ -shaped, projecting beneath just basad midpoint; basal piece nearly as long as tegmen; median lobe about half length of tegmen, with basal apodemes widely separate at gonopore, convergent toward tegmen base.

Remarks.

The pattern of propygidial punctation (Fig. 95E), with dense ground punctation visible at sides, while larger punctures are concentrated in the middle is unusual, although there are a few distantly related species that share it. Of these, this one alone has a distinct prescutellar impression (Fig. 95D). We restrict the type series to those specimens from the Guianas and northeastern Amazonian region, though there is little evident variation throughout the range.

Etymology.

The name of this species refers to both the deep pygidial sulcus and the deeply impressed median propygidial punctures.