Maladera kolasibensis, Sreedevi, Kolla, Speer, Jana, Fabrizi, Silvia & Ahrens, Dirk, 2018

Sreedevi, Kolla, Speer, Jana, Fabrizi, Silvia & Ahrens, Dirk, 2018, New species and records of Sericini scarab beetles from the Indian subcontinent (Coleoptera, Scarabaeidae), ZooKeys 772, pp. 97-128 : 98-100

Maladera kolasibensis sp. n. Figures 1 F–I, 5

Type material examined.

Holotype. ♂ "India: Kolasib, Mizoram, 24°13'N, 92°40'E, 25.iv.2014, leg. K. Sreedevi/ 939 Sericini : Asia spec./ ICAR-NBAIR-S2" (NBAIR).

Description.

Length: 9.9 mm, length of elytra: 7.5 mm, width: 6.2 mm. Body oval, dark reddish brown, dull, labroclypeus shiny, except some single setae on head dorsal surface nearly glabrous.

Labroclypeus wide and subtrapezoidal, widest at base, lateral margins weakly convex and convergent anteriorly, anterior angles strongly rounded; anterior margin weakly sinuate medially, margins weakly reflexed; lateral margin and ocular canthus produce an indistinct blunt angle; surface nearly flat, finely and densely punctate, glabrous; frontoclypeal suture distinctly incised, evenly curved; smooth area anterior to eye weakly convex, twice as wide as long; ocular canthus short and wide (1/3 of ocular diameter), finely and densely punctate, without a terminal seta. Frons with sparse, fine punctures, and one or two single long setae beside each eye. Eyes small, ratio diameter/interocular width: 0.63. Antenna with ten antennomeres; club with three antennomeres and straight, 1.1 times as long as remaining antennomeres combined. Mentum elevated and slightly flattened anteriorly.

Pronotum moderately wide, widest at base, lateral margins evenly convex and convergent anteriorly, anterior angles distinctly produced and sharp, posterior angles blunt, strongly rounded in the tip; anterior margin convex, with the marginal line widely lacking, base without marginal line; surface sparsely and finely punctate, glabrous; lateral margin finely setose, anterior margin glabrous; hypomeron carinate, not produced ventrally. Scutellum wide, triangular, dull, with fine, dense punctures.

Elytra widest at posterior third, striae distinctly impressed, finely and sparsely punctate, intervals nearly flat, with fine and evenly dense punctures, nearly entirely glabrous; epipleural edge robust, ending at strongly curved external apical angle of elytra, epipleura sparsely setose; apical border of elytra finely membranous, with a fine rim of microtrichomes (visible at ca. 100x magnification).

Ventral surface dull, coarsely and densely punctate, glabrous, metasternal disc sparsely covered with fine, short setae; metacoxa with a few longer setae laterally. Abdominal sternites finely and densely punctate, glabrous, each sternite with a loose transverse row of punctures each bearing a fine seta. Mesosternum between mesocoxae as wide as mesofemur. Ratio of length of metepisternum/metacoxa: 1/1.44. Pygidium weakly convex and dull, coarsely and densely punctate, without midline, glabrous except a few robust setae along apical margin.

Legs short and wide, shiny; femora with two longitudinal rows of setae, finely and sparsely punctate. Metafemur with anterior margin acute, without adjacent serrated line, both rows of setae completely reduced; posterior margin smooth, widened and smooth at apex ventrally, not serrate dorsally, glabrous. Metatibia short and wide, widest at middle, ratio of width/length: 1/2.18, sharply carinate dorsally, with two groups of spines, basal group at anterior third, apical group at three quarters of metatibial length, with a few short robust setae and a short serrated line parallel to the dorsal margin basally; lateral face longitudinally convex, shiny but basal third dull, impunctate and glabrous; ventral margin finely serrate, with four equidistant robust setae; medial face smooth and glabrous; apex finely serrate, moderately truncate interiorly near tarsal articulation. Tarsomeres dorsally smooth and glabrous; meso-and metatarsomeres lacking in holotype. Protibia moderately long, bidentate; anterior claws symmetrical, basal tooth of both claws bluntly truncate at apex.

Aedeagus: Fig. 1 F–H. Habitus: Fig. 1I. Female unknown.

Diagnosis.

Maladera kolasibensis sp. n. is very similar to M. namborensis Ahrens & Fabrizi, 2016, in the shape of the genitalia and external morphology. The new species differs from M. namborensis by the longer parameres and the lacking lateroapical processes of phallobase.

Etymology.

The new species is named after the type locality of the species, Kolasib.