Operclipygus crenulatus, 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 : 98

Operclipygus crenulatus sp. n. Figs 24 G–HMap 8

Type locality.

BRAZIL: Amapá:Serra do Navio [0°59'N, 52°00'W].

Type material.

Holotype female: "BRASIL: Amapá: Serra do Navio 0°59'N, 52°00'W Piège d’interception 17 –30.ix.1991” / "Caterino/Tishechkin Exosternini Voucher EXO-00185" (UFPR).

Diagnostic description.

This species is similar in most characters to the preceding two, differing as follows: length: 1.72 mm, width: 1.44 mm; body rufescent, with sides rounded, not particularly elongate, finely punctate, lacking coarse punctures on pronotum and elytra; pronotal sides moderately convergent in basal two-thirds, curving inward to anterior corners; central portion of anterior marginal stria strongly crenulate, marginal bead not markedly elevated; elytral striae not so broadly impressed, with only a single epipleural stria, inner subhumeral stria completely absent, 5th stria obsolete in basal third, sutural stria obsolete in basal fourth, other striae complete; apical marginal elytral stria absent; prosternal keel more distinctly rounded at base, with fine, complete carinal striae remaining separate to presternal suture; marginal stria of prosternal lobe present, interrupted at middle by median ridge; mesoventrite emarginate in front, with fine, complete marginal stria; mesometaventral stria weakly and narrowly arched forward at middle, central arch isolated from lateral metaventral striae, which are fine, continuous with recurrent stria; propygidium with sparse coarse punctures separated by slightly more than their diameters; pygidial punctures finer, uniform; apical marginal stria of pygidium complete; apical tarsomeres more or less cylindrical, not expanded or laterally flattened; pretarsal claws longer, divergent.

Remarks.

This species is quite distinct in the group, not so distinctly punctate (Fig. 24G) and with plesiomorphic, simple apical tarsomeres. However, the distinctive prosternal lobe (Fig. 24H) associates it with little doubt.

Etymology.

The name of this species refers to its crenulate anterior marginal pronotal stria.