Operclipygus foveipygus (Bickhardt, 1918)

Caterino, Michael S. & Tishechkin, Alexey K., 2013, A systematic revision of Operclipygus Marseul (Coleoptera, Histeridae, Exosternini), ZooKeys 271, pp. 1-401 : 245-249

Operclipygus foveipygus (Bickhardt, 1918) Figs 64 C–D65E–F, HMap 24

Phelister foveipygus Bickhardt, 1918c: 243; Operclipygus foveipygus : Wenzel (1976: 258).

Type locality.

Not specified beyond Bolivia.

Type material.

Holotype (ZMHB): “Boliv.”/”Type”/” Phelister pulvillus " [sic] /" Phelister foveipygus Bickhardt n. sp." (ZMHB), examined 2010.

Other material.

BOLIVIA: Cochabamba: 4: Est. Biol. Valle Sajta, Univ. San Simon, 67.5km E Villa Tunari, 17°06'19"S, 64°46'57"W, 300m, 9-13.ii.1999, FIT, lowland rain forest, F. Genier (CMNC); 1: 117km E Cochabamba, at Lagunitas, 17°06'22"S, 65°40'57"W, 1000m, 8-12.ii.1999, FIT, montane evergreen forest, F. Genier (CMNC); 1: 117km E Cochabamba, Yungas, Cochabamba-Villa Tunari Rd., 17°6'32"S, 65°41'12"W, 1040m, 1-6.ii.1999, FIT, yungas forest, R. Hanley (SEMC), 1: 6-8.ii.1999, FIT, R. Hanley (CMNC); Santa Cruz: 8: 5km SSE Buena Vista, Flora y Fauna Hotel, 17°29.925'S, 63°39.128'W, 440m, 15-24.xii.2003, FIT, S. & J. Peck (CMNC); 1: 5km SSE Buena Vista, Flora y Fauna Hotel, 17°29.92'N, 63°39.13'W, 440m, 24-31.xii.2003, FIT, S. & J. Peck (CMNC) 2: 7-12.v.2004, FIT, A.R. Cline (AKTC), 1: 25.iv.2004, 6.v.2004, FIT, A.R. Cline (AKTC); 2: Amboro National Park, Los Volcanes, 18°06'S, 63°36'W, 1000m, 20.xi-12.xii.2004, FIT, H. Mendel & M.V.L. Barclay (BMNH). ECUADOR: Napo: 4: 20km S. Tena, 600m, 11.vii.1976, forest litter, S. Peck (FMNH); Orellana: 12: Yasuní Res. Stn., mid.Rio Tiputini, 0°40.5'S, 76°24'W, 17-23.vi.1999, FIT, A.K. Tishechkin (LSAM), 3: 18-23.vi.1999 (LSAM), 10: 20-29.vi.1999 (LSAM), 17: 23-30.vi.1999 (LSAM), 25: 28.vi-5.vii.1999 (LSAM), 2: 2.vii.1999, rotten sticks (LSAM),, 2: 4-17.vii.1999 (LSAM), 12: 5-12.vii.1999 (LSAM), 1: 7-13.vii.1999 (LSAM), 13: 11-18.vii.1999 (LSAM), 2: 12-20.vii.1999 (LSAM), 5: 18-25.vii.1999 (LSAM), 19: 23.vii-4.viii.1999 (LSAM), 1: 26-30.vii.1999 (LSAM), 4: 5-10.ix.1999, FIT, primary forest, E.G. Riley (TAMU); 3: Parque Nac. Yasuní, Via Maxus at Puente Piraña, 0°39.5'S, 76°26'W, 20-24.vii.2008, FIT, A.K. Tishechkin (AKTC), 3: 14-20.vii.2008, FIT, A.K. Tishechkin (AKTC); 25: Tiputini Biodiversity Station, 0.6376°S, 76.1499°W, 2-9.vi.2011, FIT, M.S. Caterino & A.K. Tishechkin, DNA Extract MSC-2172 (SBMNH); 1: Tiputini Biodiversity Station, 0°38.2'S, 76°8.9'W, 27-31.vii.2007, FIT, A.K. Tishechkin (AKTC), 2: 5-25.ix.2000, D.J. Inward & K.A. Jackson (BMNH); 1: Yuturi Lodge, 21.iii.1999, FIT, R. Brooks (CMNC); 5: Payamino Research Station, 0°29'36.01"S, 77°17'29.15"W, 300m, 30.vii-12.viii.2007, FIT, CPDT Gillett (BMNH); Sucumbíos: 6: Sacha Lodge, 0°28'14"S, 76°27'35"W, 270m, 21-24.iii.1999, FIT, R. Brooks (SEMC), 1: 24.iii.1999, FIT, R. Brooks (CMNC). 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). PERU: Cusco: 1: Consuelo, Manu rd. km 165, 8.x.1982, leaf litter, L. Watrous & G. Mazurek (FMNH), 1: 1.x.1982, litter at rotten logs, L. Watrous & G. Mazurek (FMNH); 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); Madre de Dios: 1: Los Amigos Field Station/CICRA, 12.5624°S, 70.0930°W, 288m, 2-11.i.2007, pitfall, bamboo forest, J. Jacobs (CASC), 23: 20-29.vii.2006, pitfall, bamboo forest, J. Jacobs (CASC), 4: 31.vii-9.viii.2006, pitfall, terra firma forest, J. Jacobs (CASC), 3: 4-15.iii.2007, pitfall, bamboo forest, J. Jacobs (CASC), 1: 272m, 20-29.vii.2006, pitfall, bamboo forest, J. Jacobs (CASC), 2: 284m, 20-29.vii.2006, pitfall, bamboo forest, J. Jacobs (CASC); 2: Los Amigos Field Station, 12.5428°S, 70.1422°W, 281m, 20-29.vii.2006, pitfall, bamboo forest, J. Jacobs (CASC), 1: 31. vii– 9.viii.2006, pitfall, bamboo forest, J. Jacobs (CASC); 1: Los Amigos Field Station, 12.5421°S, 70.1435°W, 292m, 20-29.vii.2006, pitfall, bamboo forest, J. Jacobs (CASC), 1: 20-29.vii.2006, pitfall, terra firma forest, J. Jacobs (CASC); 1: Los Amigos Field Station, 12.5657°S, 70.0988°W, 272m, 2-11.i.2007, pitfall, bamboo forest, J. Jacobs (CASC), 2: 31. vii– 9.viii.2006, pitfall, bamboo forest, J. Jacobs (CASC), 1: 4-15.iii.2007, pitfall, bamboo forest, J. Jacobs (CASC), 1: 29.vii.2006, pitfall, bamboo forest, J. Jacobs (CASC), 8: 20-29.vii.2006, pitfall, bamboo forest, J. Jacobs (CASC), 1: 2-11.i.2007, pitfall, terra firma forest, J. Jacobs (CASC); 1: Los Amigos Field Station, 12.5458°S, 70.1149°W, 283m, 31.vii-9.viii.2006, pitfall, bamboo forest, J. Jacobs (CASC); 5: Manu National Park, Amazonas Lodge, N. Atalaya, 12°52.2'S, 71°22.6'W, 480m, 10-13.xi.2007, FIT, D. Brzoska (SEMC); 2: Manu National Park, Pantiacolla Lodge, Alto Madre de Dios River, 12°39.3'S, 71°13.9'W, 420m, 14-19.xi.2007, FIT, D. Brzoska (SEMC); 6: Manu National Park, Cocha Cashu Bio. Sta., 11°53'45"S, 71°24'24"W, 350m, 17-19.x.2000, FIT, R. Brooks (SEMC); 2: Manu National Park, Pakitza Bio. Stn., Reserved Zone, Castanal Trail, 11°56'41"S, 71°17'0"W, 317m, 15-16.x.2000, FIT, R. Brooks (SEMC); 2: Manu National Park, Cocha Salvador, Reserved Zone, 12°0'13"S, 71°31'36"W, 310m, 20-21.x.2000, FIT, R. Brooks (SEMC); 3: Tambopata, Reserva Cuzco Amazonico, 15km NE Pto. Maldonado, 12°33'S, 69°03'W, 200m, 20.vi.1989, FIT, J. Ashe & R. Leschen (SEMC), 4: 15.vi.1989, FIT, J. Ashe & R. Leschen (SEMC), 1: 17.vi.1989, Agaricales, J. Ashe, R. Leschen (SEMC), 7: 17.vi.1989, FIT, J. Ashe & R. Leschen (SEMC), 2: 24.vi.1989, Bolete, J. Ashe, R. Leschen (SEMC), 3: 22.vi.1989, FIT, J. Ashe & R. Leschen (SEMC), 7: 24.vi.1989, FIT, J. Ashe & R. Leschen (SEMC), 1: 28.vi.1989, FIT, J. Ashe & R. Leschen (SEMC), 1: 30.vi.1989, FIT, J. Ashe & R. Leschen (SEMC), 1: 2.vii.1989, FIT, J. Ashe & R. Leschen (SEMC), 1: 4.vii.1989, FIT, J.S. Ashe. R. Leschen, D. Silva (SEMC), 1: 13.vii.1989, FIT, J. Ashe & R. Leschen (SEMC), 2: 16.vii.1989, FIT, J. Ashe & R. Leschen (SEMC), 1: 18.vii.1989, Ganoderma, J. Ashe, R. Leschen (SEMC), 1: 16.vii.1989, Buchenavia fruit fall, J. Ashe & R. Leschen (SEMC).

Diagnostic description.

Length: 1.75-2.37 mm, width: 1.56-2.09 mm; body piceous, broadly rounded; frons shallowly depressed at middle, with fine, sparse ground punctation; frontal stria with sides divergent, rounded, sinuate over antennal bases, arcuate across front; supraorbital stria fine, rounded dorsad, detached from sides of frontal stria; epistoma moderately convex; labrum about twice as wide as long, asymmetrically emarginate apically, projecting beneath; left mandible untoothed, right mandible with small, subacute basal tooth; pronotum lacking prescutellar impression, with fine, sparse ground punctation, lacking lateral pronotal punctures; anterior margin of pronotum very weakly projecting at middle; marginal pronotal stria generally broadly interrupted behind head, may be weak and fragmented; submarginal pronotal stria continuous, complete along lateral and anterior margins, marginal bead convex; median pronotal gland openings about three-fourths pronotal length behind anterior margin; elytra with two complete epipleural striae, outer subhumeral stria complete, inner subhumeral stria present in apical half, fine, dorsal striae 1-3 complete, 4th stria present in apical third or slightly more, 5th stria present in apical half, sutural stria present in apical three-fourths; prosternal keel very weakly projecting at base, carinal striae complete, broadly separated at base, meeting in rather narrow anterior arch; anterior metaventral margin broadly, very shallowly emarginate, marginal stria complete; mesometaventral stria arched forward at middle short of mesoventral midpoint, sinuate laterally, continued obliquely posterolaterad toward outer corner of metacoxa, abbreviated at apex; 1st abdominal ventrite with two lateral striae, both abbreviated posteriorly, with small fovea near inner corner of metacoxa; propygidium with fine, moderately sparse ground punctation and irregularly oval, shallow punctures over most of disk separated by one-fourth their diameters or slightly more; pygidium with fine, dense ground punctation, lacking coarser punctures except along basal margin; marginal pygidial sulcus deep, but rather fine along most of margin, ending in large, transversely oval basal foveae. Male genitalia (Figs 65 E–F, H): accessory sclerites absent; T8 about twice as long as broad, basal membrane attachment line slightly distad basal emargination, apical emargination narrow, shallow, ventrolateral apodemes most strongly developed near base, narrowed to apex, not meeting at midline; S8 with apical guides divergent, strongly and somewhat abruptly expanded near apex, bearing a couple setae; T9 with apices weakly convergent, slightly enlarged and apically truncate, ventrolateral apodemes well developed; T10 with halves fused along basal part of midline; S9 broad, evenly widened to base and apex, with distinct apical emargination, apical flanges separate, more strongly sclerotized along midline and lateral margins; tegmen with sides evenly converging from near base to apex, with strong, narrow medioventral process projecting strongly beneath; median lobe large, nearly as long as tegmen, with wide gonopore, proximal apodemes differentiated into short, thick portion, with proximal arms prominent, sinuate; basal piece short, about one-third tegmen length.

Remarks.

This species and Operclipygus fossipygus are the most commonly collected species that have large pygidial foveae, and they are sympatric over much of Amazonia. Operclipygus foveipygus lacks dense punctation on the sides of the propygidium (Fig. 64D), and has coarse secondary punctures more or less uniformly distributed across the propygidium, whereas the coarse punctures are very narrowly limited to the middle of the disk in Operclipygus fossipygus (see Fig. 64B).