Dermatodina boroveci, Kania, Jarosław & Piwnik, Agata, 2017

Kania, Jarosław & Piwnik, Agata, 2017, Notes on the genera Antinia Pascoe, 1871 and Dermatodina Faust, 1895 with description of D. boroveci sp. nov. from Thailand (Coleoptera: Curculionidae: Entiminae), Zootaxa 4232 (3), pp. 322-330 : 324-329

Dermatodina boroveci sp. nov.

( Figs 15–27 )

Type material. Holotype and 9 paratypes with the same label data: “ THAILAND, Nan Prov., Ban Huay Kon env., 27.V–10.VI 2002, P. Průdek & M. Obořil leg. S”; “ Sloupno, the Czech Republic ”.

Type depository. Holotype (male) is deposited in Polish Academy of Sciences, Warsaw, 4 paratypes (1 male and 3 females) in coll. J. Kania, Institute of Environmental Biology , Faculty of Biological Sciences , University of Wroclaw, Poland ; 5 paratypes (3 males and 2 females) in coll. R. Borovec.

Etymology. We dedicate this new species to Roman Borovec (Sloupno, the Czech Republic), a distinguished taxonomist, specialist in the subfamily Entiminae ( Coleoptera : Curculionidae ).

Diagnosis. In the shape of the body, this species is most similar to D. variegata , but the latter is somewhat more slender and decidedly larger than D. boroveci sp. nov.

Description. Male body length 2.30–3.10 mm (2.64 mm average), width 1.47–2.15 mm (1.75 mm average); female body length 2.45–2.75 mm (2.60 mm average), width 1.47–1.57 mm (1.52 mm average).

Body pyriform ( Figs 15, 16 ), clearly convex ( Fig. 17 ), totally dark brown, lustrous, punctures on elytral striae darker, blackish brown.

Body surface covered by recumbent and erect scales ( Figs 18, 19 ). Recumbent scales elongate-ovate or nearly round, with granular microsculpture, cream-coloured, in places with pink shade, lustrous, varied in size; dorsally on head, pronotum and elytra loosely distributed. Rostrum laterally and dorsally on lateral margins covered by recumbent scales clearly denser, as on sides of pronotum and elytra. On elytra more or less defined “u”-shaped band extended posteriad from ¼ of elytral length at height of lateral margins, reaching suture, which is mid-length of elytra. Legs almost uniformly covered by recumbent scales, which are slightly more densely arranged on femora near joint with tibia. Antennae without recumbent scales. Erect scales of same colour as recumbent ones, markedly raised, 2.5–3.0x as long as recumbent ones, almost straight; apex of scales nearly perpendicularly truncate, slightly bent and widened.

Head broadened behind eyes, separated from rostrum by sinusoidal, not very wide, flat transverse furrow. Front with very narrow, shallow median sulcus, extended from transverse furrow posteriad almost to anterior margin of pronotum. Rostrum slightly wider at base than at level of antennal base, constricted at mid-length. Rostrum with delicate funnel-shaped depression dorsally; depression laterally bordered with poorly defined costae, running from antennal base posteriad to transverse furrow that separates rostrum from head. Tip of rostrum with delicate depression between antennal base and epinotum, without clear costae on sides, epinotum very feebly distinguishable from rest of rostrum. Antennal grooves not visible from above, in lateral view narrow and “s”- shaped, terminating at level of anterior margin of each eye. Eyes somewhat unevenly convex, ovate when seen laterally. Antennae fairly long, their scape reaching posteriad to nearly anterior margin of pronotum. The first and second segments of funicle longer than wide, conical; first segment longest, subequal to lengths of second and third combined; third segment spherical, distal segments, from the fourth to seventh, wider relative to their length. Club elongate-ovate ( Fig. 27 ). Erect scales on antennal scape similar in shape to those covering dorsal part of body, but smaller in size, 2.5–3.0 x shorter than erect scales on dorsal surface of rostrum.

Pronotum broader than long, average 1.58x (1.50–1.65x) in male and 1.55x (1.50–1.61x) in female. In lateral view, delicately convex, widest at mid-length, base clearly wider than anterior margin. Anterior and posterior margin of pronotum straight. Dorsally and laterally pronotum with clearly convex tubercles, in both sexes about the entire surface. The finest tubercles on sides of pronotum, markedly larger dorsally; in female, tubercles merged into irregular costa in middle of pronotum, extended almost from anterior margin to base. Each tubercle with protruding seta.

Elytra clearly sexually dimorphic. Almost spherical in outline in male, more or less as long as wide (0.95 to 1.04x), apically rounded; slightly longer than wide in female, 1.18x average (1.08–1.23x), egg-shaped, strongly narrowing towards apex. Convex in both sexes, widest before mid-length. Interstriae delicately convex, with very fine granules, slightly wider than sulci. Sulci shallow, with fine oval, impressed punctures, 2.5–3.0x as long as adherent recumbent scales. Scutellum not visible.

Legs long, slender. Anterior tibia in male longer than length of pronotum, 1.18x (1.12–1.22x), in female, 1.19x (1.12–1.26x), delicately bent. Femora and tibiae of all pairs of legs with fine granules equipped with setae of similar shape and length as those on dorsal body surface. Tarsi small, pale brown, third segment emarginate nearly to base, the fourth almost as long as rest of tarsus ( Fig. 26 ). Claws considerably darker, fused at base, of equal length. Male abdominal sternites as in Fig. 24 .

Male terminalia: see Figs 22, 24 . Aedeagus asymmetrical at apex, with very fine setae. Internal sac with group of overlapping sclerites, complex in structure. The longest, club-shaped apically, sclerite, extending along length of apodeme. Three smaller sclerites assume the shape of complex hooks or group of spines fused at base. Tegmen without parameres.

Female terminalia: see Figs 20, 21, 25 . Ovipositor very delicate, from base to mid-length parallel-sided whereas from mid-length to apex clearly narrowed, its lateral margins clearly strengthened by strongly chitinized rod-shaped structures. Three variously shaped sclerites in bursa copulatrix. Styli short, with setae (3 long and 3 short) ( Fig. 25 ).

Figures

FIGURES 15 – 19. Dermatodina boroveci sp. nov.: 15, female, dorsal view, 16, male dorsal view, 17, male, lateral view, 18, scales on etytra, 19, erect scale on elytra.

FIGURES 20 – 27. Dermatodina boroveci sp. nov.: 20, sternite VIII (female), 21, female terminalia, general structure diagrammatic, 22, aedeagus, 23, spiculum gastrale, 24, male abdominal sternites, 3 rd to 5 th, 25, stylus, 26, fore tarsus, 27, antenna.