Operclipygus disconnectus, 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 : 258-259

Operclipygus disconnectus sp. n. Figs 67F68 G–KMap 24

Type locality.

PERU: Junín:11km NE Puerto Ocopa, Los Olivos [11°7.0'S, 74°15.52'W].

Type material.

Holotype male: "PERU: Depto. Junín, 11km NE Puerto Ocopa, Los Olivos. 11°7.00'S, 74°15.52'W, 1200m. Window traps 31.iii.-1.iv.2009. A.V. Petrov"/ "Caterino/Tishechkin Exosternini Voucher EXO-00401" (FMNH). Paratypes (2): PERU: Junín: 1: Pampa Hermosa Lodge, 22km N San Ramon, 10°59.3'S, 75°25.5'W, 1220m, 24-27.xi.2007, FIT, D. Brzoska (SEMC); 1: Villa Rica Rd., 10°47'6"S, 75°18'54"W, 1475m, 15-18.x.1999, FIT, R. Brooks & D. Brzoska (SEMC).

Diagnostic description.

Length: 2.12-2.31 mm, width: 1.90-2.12 mm; body piceous, broadly rounded; frons weakly depressed; frontal stria with sides rounded, interrupted 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, with 2-5 coarse lateral punctures; anterior margin of pronotum not projecting at middle; marginal pronotal stria generally broadly interrupted behind head; submarginal pronotal stria continuous, complete along lateral and anterior margins, marginal bead weakly convex; median pronotal gland openings about two-thirds pronotal length behind anterior margin; elytra with two complete epipleural striae, outer subhumeral stria complete, inner subhumeral stria fine, present in apical half, dorsal striae 1-3 complete, 4th stria present in apical half, 5th stria present in apical third, sutural stria present in apical three-fourths; prosternal keel truncate to weakly rounded at base, carinal striae complete, convergent to anterior arch, microsculptured between; anterior metaventral margin straight, marginal stria complete; mesometaventral stria rather narrowly arched forward at middle, reaching to mesoventral midpoint, sinuate laterally, continued obliquely posterolaterad toward outer corner of metacoxa, slightly abbreviated at apex; 1st abdominal ventrite with complete inner lateral stria, abbreviated outer stria; inconspicuous fovea present near inner corner of metacoxa; propygidium with fine, moderately sparse ground punctation and irregularly oval, shallow punctures over most of disk, separated by about one-third their diameters; pygidium with fine, dense ground punctation, lacking coarser punctures; marginal pygidial sulcus absent, but basolateral corners of pygidium with rather small, round foveae. Male genitalia (Figs 68 G–K): accessory sclerites present, large; T8 rather narrow, slightly convergent apically, apical emargination rather narrow, but with larger, secondary, parallel desclerotized area surrounding it, basal emargination evenly arcuate, basal membrane attachment line distad basal emargination by about one-fourth its depth, ventrolateral apodemes most strongly developed near base, narrowed to apex, not meeting at midline; S8 with sides weakly rounded, subparallel, with apical guides narrow, widening weakly to apex; T9 with apices weakly convergent, slightly enlarged and apically truncate; T10 with halves fused along basal third of midline; S9 broad apically, sclerotized along edges, evenly narrowed to narrowly rounded base, with shallow apical emargination, apical flanges separate; tegmen widest one-third from apex, narrowed to base and apex, with strong, narrow medioventral process projecting beneath; median lobe large, three-fourths 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 is unique in the presence of basolateral pygidial foveae that are not connected by any indication of a marginal sulcus (Fig. 67F).

Etymology.

This species’ name refers to the lack of marginal connection between the pygidial foveae.