Excalidiopsis, Rukmane-B‚rbale, 2022

Rukmane-B ‚ rbale, Anita, 2022, Anew genus and two new species of the tribe Celeuthetini Lacordaire, 1863 (Coleoptera: Curculionidae) from the Philippines, Baltic Journal of Coleopterology 22 (2), pp. 421-428 : 422-423

Excalidiopsis gen. nov.

Type species: Excalidiopsis palawanensis sp. nov.

Description. Body medium sized, males and females of nearly same size, last beeing bigger, with wider elytra; prothorax and elytra strongly rugose except smooth underside; head smooth, rostrum and legs granulated; body covered with round to elliptic bright, shiny scales of various colour forming scally spots, lines and patches.

Forehead straight, separated from rostrum by sulcus; eyes small, slightly prominent to unprominent from the outline of the head; rostrum longer than wide; dorsal surface with longitudinal medial groove from medial part to base; frontal part straight to slightly widened apically, ventral part widened apically; dorsal contour of forehaed and rostrum decreased from widened apex; lateral contour more or less straigth; antennal scrobes dorso­lateral position, open posteriorly, narrow triangular, dorsal furrow more or less sharp, wide V­shaped, with peak before the middle, ventral furrow curved downvards, rised to apex, end just before inner margin of eye.

Antennae with scape reaching medial part of prothorax; scape flattened dorsally, widened apically, nearly same length as funicle, mingled with short light hairs; funicle mingld with longer light hairs, club short, more or less equal in length and width; segments I to VII subequal in size, with II beeing same to 1.5 times longer than rest.

Pronotum with rugose puncture, mingled with short hairs, with longitudinal lines of glossy scales; dorsal contour nearly straigth, slightly widened at medial part, lateral contour straight to slighty convex before the medial part.

Coxa and coxal cavities connate. Hind tibiae with semi­enclosed corbel.

Elytra lanceolate, convex dorsally, widest along middle, apex extended; with well expressed intervals of strongly rugose puncture rows; each elytron with seven to ten scally patches and two more sutural patches of shiny scales.

Differential analyses. Among 11 Philippine distributed genera of the tribe Celeuthetini , Excalidiopsis gen. nov. is most closely related to Calidiopsis Heller, 1913 by the following features: antennal scape long, reaching medial to hind part of prothorax, antennal scape of nearly same length as funicle, prothorax and elytra strongly rugose, prothorax small, slender, nearly straigth dorsally, longer than wide, elytra with strongly extended apex dorsally. The new genus can be distinguished from Calidiopsis by the following characters: 1) large, strongly prominent eyes in Calidiopsis , while small, unprominent or slightly prominent in Excalidiopsis gen. nov.; 2) antennal scape of Calidiopsis covered with very long, dark hairs while hairs on antennal scape of Excalidiopsis gen. nov. short; 3) I and II segment of funicle differ in length from segments III to VII in Calidiopsis , I beeing from 1.5 times longer and III beeing up to three times longer than segments III to VII, segments of Excalidiopsis gen. nov. subequal in size, with II being same or slightly longer than I to VII; 4) club of Excalidiopsis gen. nov. short, nearly same length and width while club of Calidiopsis long, at least twice as long as wide ( Fig. 3 ).

Distribution. Philippines, Palawan Island.

Etymology. The generic name is derived from similarity with closely related genus Calidiopsis .

Figures

Figure 3. A–C. Dorsaw view of head and antennae of selected species. A – Excalidiopsis palawanensis sp nov. B – Excalidiopsis bramanti sp. nov. C – Calidiopsis bilineatus Rukmane, 2020; D–E. Lateral view of selected species. D – Excalidiopsis palawanensis sp. nov. E – Excalidiopsis bramanti sp. nov.