Operclipygus guianensis, 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 : 202-203

Operclipygus guianensis sp. n. Figs 54 D–E55E–F, HMap 19

Type locality.

FRENCH GUIANA: Saül [3°1.37'N, 53°12.57'W].

Type material.

Holotype male: "GUYANE FRANÇAISE: Bélvédère de Saül, point de vue. 3°1'22"N, 53°12'34"W. Piège vitre, 20.xii.2010. SEAG leg."/ "Ca terino /Tishechkin Exosternini Voucher EXO-001766" (MNHN). Paratypes (10): FRENCH GUIANA: 1: Belvèdére de Saül, point de vue, 3°1'22"N, 53°12'34"W, 10.xii.2010, Window trap, SEAG (MNHN); 1: Régina, Réserve des Nouragues, 4°2.27'N, 52°40.35'W, 19.ii.2010, FIT, SEAG (CHND), 1: 3.xi.2009, FIT, SEAG (CHND); 2: Mont. Tabulaire Itoupé, 3°1.38'N, 53°5.73'W, 570m, 17.iii.2010, FIT, SEAG (FMNH, MSCC), 2: 24.iii.2010, FIT, SEAG (AKTC, MNHN), 2: 31.iii.2010, FIT, SEAG (CHND). 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).

Diagnostic description.

In external characters, the differences between this species and the preceding are few and minor, as follows: length: 2.56-2.65 mm, width: 2.34-2.43 mm; frons not markedly depressed at middle; pronotal disk with larger number of coarser punctures near sides, ~10-15 in dense cluster just anterad middle; median pronotal gland openings near one-third from anterior margin of pronotum; elytra with outer subhumeral stria usually complete, striae 1-3 less distinctly abbrevated at base; 1st abdominal ventrite with outer lateral stria curved behind metacoxa, ending in a distinctly enlarged gland opening. Male genitalia: T8 identical to that of Operclipygus hirsutipes (Fig. 55A); S8 with apices more broadly rounded(Fig. 55E), and inner edges more strongly divergent from near base; T9 identical to above; T10 small as above, but with halves fused for short distance at base; S9(Fig. 55F) narrower overall, with deeper, broader apical emargination; tegmen(Fig. 55H) similar in shape to above, with sides more rounded toward apex, and with medioventral process present, broadly ‘V’ -shaped, weakly sclerotized but with acute apex, not projecting beneath tegmen; median lobe long, with wide gonopore, proximal apodemes about three-fourths tegmen length, abruptly narrowed midway to base of tegmen.

Remarks.

Within the group the Guianan species is best recognized by the more numerous and more strongly impressed lateral pronotal punctures(Fig. 54D), finer pygidial punctures(Fig. 54E), the generally complete outer subhumeral elytral stria, the flat frons, and by the distinctly enlarged gland opening on the 1st abdominal ventrite in which the outer lateral stria of the disk terminates, as well as by male genitalic characters.

Etymology.

This species is named for the region from which it is exclusively known.