Operclipygus rubidus (Hinton, 1935) Hinton, 1935

Caterino, Michael S. & Tishechkin, Alexey K., 2013, A systematic revision of Operclipygus Marseul (Coleoptera, Histeridae, Exosternini), ZooKeys 271, pp. 1-401 : 212-213

Operclipygus rubidus (Hinton, 1935) comb. n. Figs 58 B–CMap 20

Phelister rubidus Hinton, 1935c: 59.

Type locality.

Not specified beyond Mexico.

Type material.

Holotype: “Mexico” / “Type” / "G.Lewis Coll. B.M.926-369" / " Phelister rubidus Hntn Type" (BMNH), examined 2010.

Other material.

COSTA RICA: Guanacaste: 1: Parque Nac. Sta. Rosa, Est. Sta. Rosa, 3-12.vi.1992, III curso Parataxon. (INBIO). NICARAGUA: Granada: 1: Reserva Domitila, 11°42.50'N, 85°57.20'W, 100m, 6-9.vi.2002, FIT, R. Brooks, Z. Falin, S. Chatzimanolis (SEMC); 1: Volcan Mombacho, Santa Ana #3, 2.vi.1998, malaise trap, J.M. Maes (MEL), 2: 30.vi.1998, malaise trap, J.M. Maes (FMNH), 2: 15.vii.1998, malaise trap (MEL), J.M. Maes; 2: Volcan Mombacho, San Joaquin #3, 30.vi.1998, malaise trap, J.M. Maes (MSCC, AKTC); Masaya: 1: Las Flores, vi.1994, malaise trap, J.M. Maes (FMNH).

Diagnostic description.

Length: 1.81-1.97 mm, width: 1.47-1.62 mm; body oval, subquadrate, rufescent; frons flat, frontal stria varied across frons, from nearly complete to fragmented to broadly interrupted; epistoma and labrum narrowed, labrum 1.5 × as wide as long, truncate; pronotal disk finely punctate, with ~20 coarser lateral punctures; marginal pronotal stria not descending onto hypomeron; lateral submarginal pronotal stria complete, very close to marginal at sides, not meeting slightly recurved anterior marginal in front; elytra with subhumeral striae absent, striae 1-4 complete, 5th and sutural striae present in apical two-thirds; venter almost entirely lacking microsculpture, with only vestigial fragments at sides of sterna; prosternal keel truncate at base, with carinal striae strongly converging, parallel in apical third, joined by narrow anterior arch; mesoventrite not projecting; propygidium broad with scattered small punctures, with vestigial microsculpture; pygidium lacking microsculpture, also with sparse small punctures, fine marginal striae nearly complete, usually obsolete only in basal fourth. Male: segments 8-10 indistinguishable from those of Operclipygus hamistrius (see Figs 57 A–D), and tegmen indistinguishable from that of Operclipygus geometricus (see Fig. 57J).

Remarks.

This distinctive species may be recognized by the lack of an outer subhumeral stria, the relatively flat frons, the numerous lateral pronotal punctures, and the complete marginal mesoventral stria (Fig. 58C), which is not reached by the subangulate mesometaventral stria.