Callistomorphus fundatus, Mazur, Milosz Adam, 2019

Mazur, Milosz Adam, 2019, Redescription of the forgotten New Caledonian weevil genus Callistomorphus Perroud, 1865 (Coleoptera, Curculionidae, Eugnomini) with descriptions of eight new species, ZooKeys 821, pp. 45-83 : 45

Callistomorphus fundatus sp. n. Figs 3, 9, 14, 23, 32, 41, 50, 59, 68, 77, 86, 95, 102, 109, 116

Diagnosis.

This species can be distinguished from other members of the genus by the following set of characters: elytra elongate, 1.6 × as long as wide across humeral calli; colour of body generally brown; pronotum with apical margin almost straight, corrugated due to numerous, small tubercles, basal margin concave; last ventrite less than 2 × wider than long with shallow apical depression.

Description.

Body length (lb) - 11.40 mm.

Body colour and vestiture (Fig. 14). Generally brown with yellow shade in some areas. Striae and intervals each with single line of elongate yellowish setae. Legs with sparse setae of the same colour as elytra.

Head (Figs 3, 59, 68, 77). Subquadrate (♂: hw/hl = 1.07). Frons 2 × as wide as eye in dorsal view. Eyes shorter than half length of head (♂: eyl/hl = 0.43), not protruding above margin of head in lateral view. Rostrum slightly longer than pronotum (♂: rl/pl = 1.04), 3.38 × as long as maximum width at apex (rl/arw); with thin, polished carina on entire length; regularly curved in lateral view. Scape shorter than rostrum (♂: scl/rl = 0.85). First funicle segment approximately 1.4 × as long as 2nd; 3rd approximately 0.65 as long as 2nd; antennomeres from 4th to 7th successively little shorter than previous one, longer than wide. Club elongate, approximately 3.8 × as long as wide, as long as last four funicle segment combined.

Pronotum (Figs 41, 50). Slightly longer than wide (♂: bpw/pl = 1.04). Basal margin distinctly, widely concave; 1.35 × as wide as apical margin (♂: bpw/apw); apically straight with numerous, small tubercles; in lateral view apical margin straight anteriorly, then converging towards base. Medial tubercle on pronotal disc well developed, divided into two, strongly protruding appendices. Width of medial constriction in relation to apical and basal margin: ♂: mpw/apw = 0.65, ♂: mpw/bpw = 0.48.

Elytra (Figs 23, 32). Elongate (♂: el/bew = 1.65). Slightly narrowed from humeral calli to apical part. Medial tubercles distinct, higher than width of its base on 3rd interval. Striae with single line of suboval punctures. Odd intervals with distinct, tooth-shape, tubercles with elongate, slightly hooked, single scale on the top. Tubercles on 7th intervals conspicuous, protruding from outline of elytra in dorsal view. Scutellum distinctly elongate, ca 1.5 × as long as wide.

Abdomen (Figs 9b, 86, 102). Abdomen of male 1.18 × as long as wide (al/aw). Male pygidium as in Fig. 102. Last ventrite elongate, subtriangular, lvw/lvl = 1.75.

Male terminalia (Figs 95, 109, 116). Penis body distinctly longer than apodemes; almost subparallel from base to apical part, apically slightly narrowed to rounded apex; basal part partly sclerotised, except medial area; in lateral view distinctly, regularly curved, apically slightly upturned. Internal sac longitudinally crinkled, without any apparent structure or sclerites. Parameroid lobes of tegmen slightly shorter than apodeme, divided almost to base; the dorsal part of the tegminal ring with membrane and sharp, protruding process. Tegminal apodeme apically extended. Spiculum gastrale robust, slingshot-shape, apically strongly sclerotised; in lateral view apodeme apically curved; hemisternites fused with base of spiculum.

Female - unknown

Measurements. ♂: al 4.50, apw, 2.00, arw 0.80, aw 3.80, bew 4.80, bpw 2.70, el 7.90, eyl 0.60, frw 0.70, hl 1.40, hw 1.50, lb 11.40, lvl 1.20, lvw 2.10, mpw 1.30, pl 2.60, rl 2.70, scl 2.30.

Type material.

Holotype, ♂ (here designated) - New Caledonia (N); 20°57.2'S, 165°17.5'E; Pic d’Amoa 360 m; 14.01.2007 forest at light; leg. M. Wanat & R. Dobosz (MNHN).

Etymology.

This epithet is derived from the Latin word “funda” (slingshot) and refers to the shape of spiculum gastrale. A variable adjective.

Remarks.

Only one specimen of this new species has been found within the studied collections. A set of characteristic features, including the almost uniform brown colour, elongate elytra and last ventrite, as well as terminal structures, indicates that this is a new species.