Pseudolanurgus asperatus Jordal, 2021

Jordal, Bjarte H., 2021, New species and records of Pseudolanurgus (Coleoptera: Curculionidae, Scolytinae) from Tanzania and Madagascar, Zootaxa 5072 (6), pp. 592-598 : 594

Pseudolanurgus asperatus Jordal , sp. nov.

( Figs 2, 5, 9 )

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Type material. Holotype, female: Madagascar, Réserve Spéciale d’Ambre , 3.5 km 235° SW Sakaramy, ex sifted litter, #BLF2654, B. Fischer, leg. 2001 . Holotype is deposited in CAS .

Diagnosis, female. Upper frons with short tuft of plumose setae; pronotal asperities not reaching anterior margin; elytral declivity with sharp interstrial granules, apex lip-shaped.

Description, female. Body length 1.7 mm, 2.7 × as long as wide, colour yellowish brown (possibly young specimen). Frons lightly concave between eyes from epistoma to vertex, lateral margin near eyes very lightly carinate; vestiture in impressed area consisting of scattered short, erect, thick setae, on upper margin a crest of raised plumose setae about as long as width of eyes; on epistoma a brush of short, stiff setae. Antennal scapus rounded, with a scant tuft of setae as long as scapus and pedicel combined; antennal club with two strongly procurved and slightly bisinuate sutures clearly marked by white setae. Eyes separated above by 2.2 × their width. Pronotum asperate on anterior half, asperities well separated, not reaching anterior margin; posterior half with coarse, shallow punctures; vestiture of short bristle-like setae. Elytral striae not impressed, interstriae smooth on disc, on declivity with densely placed, small, sharp granules. Vestiture consisting of interstrial rows of thick bristles or spatulate setae separated by their length or slightly less, and irregular rows of recumbent strial setae which are slightly overlapping in length and somewhat confused along suture and discal striae 1 and 2. Protibiae with one lateral and two apical denticles on its posterior side.

Etymology. Latin masculine nominative participle asperatus , meaning roughened, referring to the granulated interstriae on the elytral declivity.

Distribution and biology. Madagascar. Only known from a single specimen collected by sifting litter near the Amber Mountain in northern part of the island.

Remarks. Distinguished from P. minutissimus by the less elongated female antennal scapus, by the more extended elytral apex, and by the sharp granules on the elytral declivity.

Figures

FIGURES 1–10. Dorsal, lateral and front view of Pseudolanurgus harunganae female (1, 4, 7) and male (8); Pseudolanurgus asperatus sp. nov. female holotype (2, 5, 9); Pseudolanurgus minutissimus female paratype (3, 6, 10).