Crenulister spinipes, Caterino, Michael S. & Tishechkin, Alexey K., 2014

Caterino, Michael S. & Tishechkin, Alexey K., 2014, New genera and species of Neotropical Exosternini (Coleoptera, Histeridae), ZooKeys 381, pp. 11-78 : 49-50

Crenulister spinipes sp. n. Figs 19 C–D, Map 4

Type locality.

FRENCH GUIANA: Réserve des Nouragues [4.038°N, 52.673°W].

Type material.

Holotype female: "GUYANE FRANÇAISE: Régina, Réserve des Nouragues, 4°2.27'N, 52°40.35'W, Piége d’interception, 28 Jan 2010. SEAG leg." / "Caterino/Tishechkin Exosternini Voucher EXO-00181" (MNHN). Paratypes (2): 1: Belvèdére de Saül, point de vue, 3°1'22"N, 53°12'34"W, 4.i.2011, FIT, SEAG (CHND); 1: Montagne des Chevaux, 4°43'N, 52°24'W, 26.xii.2008, FIT, SEAG (FMNH)

Diagnostic description.

Length: 2.4-2.6 mm, width: 2.2-2.4 mm; as for generic description with the following diagnostic characters: body rufobrunneus, elongate ovoid, moderately convex; frontal stria fine but complete across middle, frontal disk rather strongly depressed, with sparse secondary punctures rather evenly distributed on frons and epistoma; epistoma with oblique lateral ridges delimiting median depression bearing faint traces of striae basally; labrum about 4 × wider than long, apical margin shallowly, broadly emarginate; pronotum with gland opening track extending posterad just beyond midpoint, with 3-4 openings along its length; pronotal sides moderately explanate along very weakly crenulate lateral submarginal stria; pronotal disk with numerous, large secondary punctures in basal third, most strongly concentrated at middle, sides largely smooth; prescutellar impression not evident; elytron with one complete, crenulate epipleural stria and second incomplete stria closer to margin in posterior half, all dorsal striae complete, moderately coarsely impressed, appearing chain-like; elytral intervals sparsely, irregularly punctate, most intervals with 12-18 punctures; prosternal keel with complete, narrowly anteriorly united carinal striae; prosternal lobe with marginal stria present only at middle; mesoventrite with marginal stria weakly crenulate, mesometaventral stria similarly so, subangulately arched forward just beyond mesoventral midpoint; postmesocoxal stria slightly recurved anterad around mesocoxa but ending short of mesepimeron; lateral metaventral stria crenulate, reaching middle of metacoxa; mesoventrite entirely and more or less uniformly coarsely punctate; metepisternal punctures coalescing into a short longitudinal stria; punctures of 1st abdominal ventrite mostly uniform, slightly obliquely elongate posterad metacoxa, transversely elongate along posterior margin, intermittently coalesced into marginal strioles, as are those of ventrites 2-4; protibia 7-8-spined, with marginal dentation very weakly developed; meso- and metatibiae with 4-5 spines each, mainly in apical half; propygidium with secondary punctures shallow, sparse, separated by 1 –2× their diameters throughout; propygidial gland opening associated with weak oblique striole in anterior corners; pygidial punctation sparse, punctures slightly smaller than those of propygidium, more or less uniformly separated by 2 –3× their diameters throughout; pygidial gland openings evident at sides about one-fourth from base, marginal striae present along sides, broadly interrupted at apex. Male: not known.

Remarks.

This species and Crenulister grossus are very similar and evidently closely related. The smaller size, less coarsely impressed elytral striae (Fig. 19C), and semistriate metepisternum, abdominal ventrites and propygidium (Fig. 19D) will distinguish this species readily. Although both are larger than average for the genus, Crenulister grossus is still markedly larger.

Etymology.

The name of this species refers to its conspicuously spinose protibiae.