Operclipygus gibbulus (Schmidt, 1889) Schmidt, 1889

Caterino, Michael S. & Tishechkin, Alexey K., 2013, A systematic revision of Operclipygus Marseul (Coleoptera, Histeridae, Exosternini), ZooKeys 271, pp. 1-401 : 249-251

Operclipygus gibbulus (Schmidt, 1889) comb. n. Figs 64 E–F66A–C, HMap 24

Phelister gibbulus Schmidt, 1889c: 339.

Type locality.

COLOMBIA: Bogotá [uncertain, question-marked on the type label].

Type material.

Lectotype, here designated: "Columbia, Bogota?"[the question mark is on the label]/ "gibbulus Schm." / "LECTOTYPE Phelister gibbulus Schmidt, 1889 M.S.Caterino & A.K.Tishechkin des. 2010" (ZMHB). 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.

COSTA RICA: Puntarenas: 1: Parque Nac. Corcovado, Est. Sirena, 0, 100m, ii.1990, G. Fonseca, (INBIO), 1: iv.1990, G. Fonseca, (INBIO), 1: vi.1990, F. Quesada, (INBIO); 1: Parque Nac. Corcovado, Est. Sirena, Send. Espaveles, 0-100m, 10-20.vii.2001, FIT, A. Azofeifa (INBIO); 1: Parque Nac. Corcovado, Est. Sirena, Corcovado Trail, 8°29'7"N, 83°34'39"W, 150m, 28.vi-1.vii.2000, FIT, Z. Falin (SEMC); 1: Rancho Quemado, Peninsula de Osa, 200m, 12-24.v.1993, A. Gutierrez, (INBIO). PANAMA: Colón: 1: San Lorenzo Forest, 9°17'N, 79°58'W, 27-28.ix.2003 (LSAM), 1: 12-13.v.2004 (LSAM), 1: 14-15.v.2004 (LSAM), 1: 19-20.v.2004 (LSAM), 4: 21-24.v.2004 (GBFM), 1: 24-25.v.2004 (LSAM), 1: 25-26.v.2004 (LSAM), 1: 9-11.x.2003 (LSAM); 10: Parque Nac. San Lorenzo, Achiote, Cafetal A Dist., 9°12'N, 79°58'W, 250m, 7-21.v.2007, FIT, A. Mercado (AKTC, GBFM); 1: Parque Nac. San Lorenzo, Achiote, Pastizal A Dist., 09°13'N, 80°01'W, 100m, 12-27.i.2008, FIT, A. Mercado (GBFM); Panamá: 1: Barro Colorado Isl., iv-x.1947, Berlese funnel, Zetek (USNM), 1: 19.ii-9.iii.1975, Berl. Rotten flowers of Pseudobombax , Lawrence, Erwin (FMNH), 1: 4.viii.2000, FIT, S. Chatzimanolis (SEMC), 1: 27-31.vii.2000, FIT, S. Chatzimanolis (SEMC), 1: 40m, 18-22.vi.2000, FIT, S. Chatzimanolis (SEMC), 1: 16.vii.1994, FIT, D. Banks, 1: 7.vii.1994, FIT, D. Banks, 1: 4.viii.1994, FIT, D. Banks; 1: Cerro Azul, ca., 2000ft, 21.ii.1976, flood debris, A.F. Newton (FMNH); 1: Old Plantation Rd. 6.9km S Gamboa, 09°05'N, 79°40'W, 80m, 7-22.vi.1995, FIT, J. Ashe, R. Brooks (SEMC); 1: Nusagandi Reserve, 09°21'N, 78°59'W, 350m, 16-17.v.1995, FIT, J. & A. Ashe (SEMC).

Diagnostic description.

Length: 1.90-2.25 mm, width: 1.68-1.97 mm; body rufopiceous, broadly rounded; frons shallowly depressed at middle, with fine, sparse ground punctation; sides of frontal stria 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 mar gin of pronotum very weakly projecting at middle; marginal pronotal stria generally broadly interrupted behind head; 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 single complete epipleural striae, outer subhumeral stria complete, sinuate at middle, inner subhumeral stria absent, subhumeral region strongly, narrowly convex, dorsal striae 1-3 complete, 4th and 5th striae similar in length, present in about apical third, sutural present in apical two-thirds; prosternal keel broad, very weakly projecting at base, carinal striae complete, broadly separated at base, meeting in broad anterior arch; anterior metaventral margin broadly, very shallowly emarginate, marginal stria complete or narrowly interrupted; mesometaventral stria broadly arched forward at middle to near marginal mesoventral stria, continued obliquely posterolaterad, abbreviated apically; 1st abdominal ventrite with two lateral striae, inner usually complete, curved mediad posteriorly, outer stria abbreviated, a small fovea present near inner corner of metacoxa; propygidium with fine, moderately sparse ground punctation and irregularly oval, shallow punctures over most of disk except posterolateral corners, separated by one-fourth their diameters or slightly more; pygidium with fine, dense ground punctation, lacking coarser punctures except for few small punctures along basal margin; marginal pygidial sulcus deep, but rather narrow along most of margin, ending in large, more or less round basal foveae. Male genitalia (Figs 66 A–C, H): accessory sclerites absent; T8 with sides weakly convergent to subtruncate apex, apical emargination narrow, deep, basal emargination narrowly rounded, nearly reaching basal membrane attachment line, ventrolateral apodemes most strongly developed basally, narrowed to apex; S8 with sides weakly convergent to apex, apical guides narrow, widening only slightly to apex, halves weakly fused along most of ventral midline; T9 with sides subparallel in basal half, convergent to broad, subtruncate, weakly convergent apices; halves of T10 almost completely fused, with only very narrow apical emargination between; S9 rather short, narrowed at middle, widening slightly to subtruncate base, apical emargination shallow, apical flanges separate; tegmen short, broad, widest just distad midpoint, narrowing weakly to base and more strongly to apex, with strong dorsoventral curvature, medioventral process projecting beneath, about one-third from tegmen base; median lobe prominent, about three-fourths tegmen length, proximal apodemes strongly differentiated proximad gonopore; basal piece short, about one-fourth tegmen length.

Remarks.

This species is closely related, and very similar to, Operclipygus foveipygus . Both have large basolateral pygidial foveae and lack dense ground punctation on the sides of the propygidium (as found in Operclipygus fossipygus ). Operclipygus gibbulus , however, lacks any indication of the inner subhumeral elytral stria, and has the mesometaventral stria (Fig. 64E) arched more broadly and further anterad than in Operclipygus foveipygus (Fig. 64C).