Derancistrus pilosus Devesa, Fonseca, and Barro, 2017

Devesa, Sergio, Fonseca, Elier & Barro, Alejandro, 2017, The GenusDerancistrusAudinet-Serville, 1832 (Coleoptera: Cerambycidae: Prioninae: Solenopterini) in Cuba, with Description of a New Species, The Coleopterists Bulletin 71 (1), pp. 191-199 : 194-198

Derancistrus pilosus Devesa, Fonseca, and Barro , new species

( Figs. 3–4 )

Type. Holotype, male: CUBA: Holguín province, Moa municipality, Pico del Toldo (20°30′24″N, 74°54′42″W), 15 May 2008, collected by Eneider Pérez (temporarily in FZPC).

Description: Holotype male. Integument shiny, reddish brown except dark brown head, apex of antennomeres I–VI, poriferous sensorial area of antennomeres III–XI (distinctly contrasting with general color of antennomeres), apical half of antennomere VII, antennomeres VIII–XI, anteromedial ridges of pronotum, scutellum, apical third of elytra, prosternal process, and medial areas of meso- and metasterna; legs more orange with femoral apices and tibial bases darker. Glabrous, except golden setae on parts of head, along lateral and anterior edges of pronotum, ventral surface of thorax, and lateral margins of abdominal ventrites.

Head: 0.5 times as wide as pronotum, with slightly elevated antennal tubercles; finely, confluently punctate around the eyes; with long setae on area of ocular emargination, clypeus, and base of antennal tubercles and mandibles. Eyes: Medium sized, finely facetted, with a shallow notch. Antennae: 11-segmented; medium sized, slightly surpassing middle of elytra; glabrous except for a few short setae, mainly on apical part of scape; scape conical, sparsely, minutely punctate, shorter than antennomere III and as long as IV; antennomeres gradually shorter from III (the longest of all) to XI, except VI as long as VII and IX as long as XI; antennomere III cylindrical, swollen toward apex; IV–VII elongated, flattened, with rounded apical angles; poriferous sensorial areas as follows: dorsally 1 small, rounded, and placed on apical half of antennomere III; small apicolateral patch on IV; 2 long apicolateral and 2 small ones near base of V; several lateral patches on VI; around apex and laterally on VII; entirely covering antennomeres VIII–XI. Pronotum: Transverse at anterior half, with a deep, V–shaped depression; with 2 contiguous, shallow depressions on each side on distal half; laterally flattened, with finely crenulated edges from anterolateral angle to apex of 1 st spine; with 2 spines (anterolateral and mediolateral) slightly directed posteriorly on each side, apex of both at same level (neither extending beyond plane of humeral angle); punctures of various sizes, irregularly distributed: punctures on top of pronotal crests sparse; on lateral margins and posterior depressions partially confluent. Scutellum: Pentagonal, 1.5 times as wide as long, with posterior edges arched and apex rounded; smooth, glabrous, finely, sparsely punctate, each puncture bearing a very short, erect setae. Elytra: Glabrous; slightly narrowed toward apex, divergent at apical third of sutural margins; elytral apex rounded, with erose edge, a small sutural spine and a small tooth at epipleural apex; coarsely, deeply punctate, on basal quarter punctures separated by about their diame- ter, gradually closer and denser toward apex. Legs: Short, nearly smooth, without noticeable denticles or spines on femora; mostly glabrous except row of erected setae on apical and inner part of tibiae. Venter: Thorax finely, deeply, sparsely punctate, denser on sides of longitudinal suture of metasternum; with long setae at apex of prosternum, denser on mesepisternum, posterior part of metepisternum, and laterally on metasternum. Prosternal process almost rectangular, centrally with longitudinal depression on anterior half; coarsely punctate, especially on sides, with 1 long seta in each puncture; basally with small tubercle apically, deeply emarginate (damaged by the insect pin when the specimen was mounted for the first time). Abdominal ventrites mostly smooth except for some irregular fine punctures; pilosity less dense than on thorax and denser on sides; ventrite V 1.7 times wider than long, trapezoidal; apex emarginate and with long setae on posterior edge.

Measurements. Total length (from mandibular apex to elytral apex) = 25.3 mm. Prothoracic length = 4.6 mm; anterior width = 4.9 mm; posterior width = 5.8 mm; width between anterolateral spines = 6.8 mm; width between mediolateral spines = 6.9 mm. Elytral length = 18.3 mm; humeral width = 8.7 mm; elytra width (at epipleural apices) = 6.0 mm. Antennal length = 15.5 mm.

Etymology. The epithet pilosus is a Latin adjective meaning hairy/covered with hair and refers to the abundant and evident ventral and pronotal bor- der pilosity.

Diagnosis. Only one specimen of this species is known. Its unique characteristics are unlike any other taxon of Derancistrus from the West Indies. Derancistrus pilosus differs from the other species of Derancistrus as follows: integument mostly reddish brown (blackish in D. anthracinus and D. coeruleus ); presence of long, erect setae on metepisternum and metasternum (lacking or very small in D. anthracinus and D. coeruleus ); prosternal process coarsely punctate and with long setae (smooth and bright with light and weak punctures in D. anthracinus and D. coeruleus ); apices of lateral spines of pronotum at the same level (mediolateral spine clearly longer in D. anthracinus and D. coeruleus ); antennae reddish brown, except the poriferous sensorial areas which are dark brown (antennae totally black in D. anthracinus and D. coeruleus ).

Figures

Fig. 3. Derancistrus pilosus, male. a) Dorsal habitus, b) Ventral habitus, c) Lateral habitus, d) Head, scape, pronotum, and scutellum, e) Prosternal process.

Fig. 4. Derancistrus pilosus, male. a) Frontal view, b) Poriferous areas on antennomeres V–XI, c) Distribution map.