Callistomorphus szoltysi, 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 szoltysi sp. n. Figs 19, 28, 37, 46, 55, 64, 73, 82, 91, 125, 130, 134, 138, 143

Diagnosis.

Together with C. farinosus Perr. and C. torosus sp. n. this new species is one of the largest members of the genus. Easy to distinguish by several features: body colour generally whitish; apical margin of pronotum distinctly rounded in lateral view, slightly concave in dorsal view; antennae slender with long, protruding setae; medial tubercles on elytra relatively small; elytra strongly convex in lateral view. Male abdominal sternite VIII with short apodeme, apical lobe enlarged.

Description.

Body length (lb) - 12.30 mm.

Body colour and vestiture (Fig. 19). Generally whitish, with elytra entirely speckled with small, light-brown irregular spots. Pronotum with elongate light-brown spot near medial tubercles; sides darker.

Head (Figs 64, 73, 82). Slightly wider than long (hw/hl ♀: 1.08). Frons narrower than double width of eye. Eyes convex, as long as half length of head (eyl/hl ♀: 0.50), not protruding above margin of head in lateral view. Rostrum longer than pronotum (rl/pl ♀: 1.20); approximately 3.35 × as long as maximum width at apex (rl/arw), distinctly, regularly curved; longitudinal carina on rostrum distinct, shining on entire length, evanescent before apex of rostrum. Scape shorter than rostrum (scl/rl ♀: 0.80). Funicle slender, all antennomeres longer than wide, with elongate, straight, distinctly protruding setae; first funicle segment approximately 1.20 × as long as 2nd; 3rd 0.7 × as long as 2nd; antennomeres from 4th to 7th with similar length, 7th distinctly wider than 6th. Club 2.75 × as long as wide, longer than last four funicle segments combined.

Pronotum (Figs 46, 55). Wider than long (bpw/pl ♀: 1.20). Apical margin in dorsal view slightly concave with distinct, numerous tubercles, apical margin distinctly rounded in lateral view; base ca 1.43 × as wide as apical margin (bpw/apw). Medial tubercles on pronotal disc distinctly elevated, portions of pronotal disc without medial tubercles distinctly concave (easily visible when viewed laterally). Width of medial constriction in relation to apical and basal margin in female: mpw/apw = 0.67, mpw/bpw = 0.47.

Elytra (Figs 28, 37). Slightly more than 1.50 × as long as its width (el/bew ♀: 1.55); subparallel from base to apical part; posterior calli well developed, protruding beyond outline of elytral in dorsal view; in lateral view strongly convex. Odd intervals with distinct, pointed tubercles furnished with single, hooked, elongate scale; these tubercles are easily visible in dorsal and lateral view. Striae formed by oval punctures, each with single, whitish scale inside. Medial tubercles relatively small, short and weakly elevated. Scutellum slightly longer than wide; surrounded by narrow, asetose area, this in turn surrounded by elongate concentrically oriented scales.

Abdomen (Fig. 91, 130). Subquadrate, al/aw 0.98. Last ventrite 2.27 × wider than long (lvw/lvl); medial area with wide, shallow cavity, above cavity small, slightly elevated, single tubercle. Apical margin with distinct, easily visible sharp edge; slightly concave apically. Pygidium wider than long, as in Fig. 130.

Female terminalia (Figs 125, 134, 138, 143). Abdominal sternite VIII with enlarged apical lobe, as long as half-length of apodeme; medially with wide, distinctly sclerotised area; sides from half of length to apex with distinct punctures, each bearing short, apically hooked setae. Abdominal tergite VIII subtriangular, apically with numerous, elongate setae. Spermatheca as in Fig. 137. Ovipositor with stout gonocoxite, stylus short.

Male - unknown

Measurements. ♀: al 4.50, apw 2.10, arw 0.90, aw 4.60, bew 5.50, bpw 3.00, el 8.50, eyl 0.60, frw 0.65, hl 1.50, hw 1.40, lb 12.30, lvl 1.10, lvw 2.50, mpw 1.40, pl 2.50, rl 3.00, scl 2.40.

Type material.

Holotype, ♀ (here designated) - New Caledonia (S); 22°05.9'S, 166°40.7'E; Rivière Bleue Parc Kaori géant, 180 m; humid forest, 22.12.2006, rainforest; leg. R. Dobosz & M. Wanat. Additional museums (USMB) label - 5958/848. (MNHN).

Etymology.

With great pleasure I dedicate this species to Henryk Szołtys (Brynek, Poland), excellent coleopterologist, field researcher and my first entomology teacher.

Remarks.

This large member of the genus is easy to distinguish from other similarly-sized species ( C. farinosus Perr. and C. torosus sp. n.) by the whitish colour of the dorsal vestiture, funicle antennomeres with protruding, elongate setae, the robust pronotum and distinctly smaller medial tubercles on elytra.