Cadoderus Marshall

Yunakov, Nikolai, 2012, 3535, Zootaxa 3535, pp. 1-104 : 9-11

Cadoderus Marshall

Marshall, 1926: 249. Type species: Ellimenistes bellus Faust, 1896 , by original designation.

Diagnosis. Very similar to Sphrigodellus Marshall , differs from it in following characters: subocular row consists of 2–3 (rarely 4–6) setae; basisternum, mesobasisternum and pro- and mesocoxae covered with plumose setae; epistome broadly arcuate, U-shaped or triangular, convex, delimited by strong carina or not; pronotum without anterior transverse setal fringe; posterior setal fringe consists of plumose setae, not hidden by posterior edge of pronotum; ventrites densely squamose; antennifers entirely visible in dorsal view; frons not declivous; funicular segment 1 as long as 2 nd; pronotum strongly transverse [PL/PW: 0.71–0.87]; aggonoporium consisting of two stickshaped symmetrical lobes connected proximally by transverse bridge and long, slender ventral processes.

Redescription.

Measurements. BL: 2.79–4.11 mm, BW: 1.30–2.22 mm, BH: 1.20–1.74 mm.

Vestiture. Body densely covered with overlapping or serried round scales, setose. Setae of head form rows along lateral edges of epifrons (recumbent or subrecumbent) and above the eyes (erect). Subocular row consists of 2–3 (4–6) setae. Temples with or without broad, bare stripe. Subgenae and genae sparsely squamose. Pronotum without anterior setal fringe. Elytral intervals 1–6 (7) with distinct row of setae. Anterior half of elytra with rather short suberect setae (half to third as long as interval width), posterior declivity with rather long, strongly erect, thick, acute or truncate spatulate setae (0.5 x or as long as interval width). Mesepimera bare or partly squamose. Basisternum, mesobasisternum, pro- and mesocoxae covered with plumose setae. Ventrites densely squamose. Scape setose and densely squamose or without scales ( C. mysticus ); scales (if present) round; setae long, slender, acute, erect or suberect. Funicle setose, segments 1–3 with elongate scales or without scales ( C. grebennikovi , C. mysticus ); setae suberect, as long as funicular segment 7. Club densely tomentose. Femora and tibiae external and internal surfaces covered with overlapping or serried scales and suberect or subrecumbent setae; setae slender, acute. Male metatibiae with more or less developed grooming brush; setae short or long. Tarsi setose and squamose or only setose (in C. mysticus ).

Coloration. Integument of body brown to deep-brown, of legs deep-brown. Background scaling deep-brown or brownish-olivaceous; striped pattern formed by green and cupreous scales, dark and pale scales with slight pearly shine. Head with green stripes around eyes and antennal sockets, anterior portion of epifrons green; pronotum with 3 cupreous stripes. Elytra background scaling deep-brown, occasionally with pale transverse band on posterior declivity and scattered deep-brown unclear spots on intervals 1, 2, 4, 6 ( C. mysticus ); intervals 1, (3, 5), 7(9)–11 green (green scales occasionally scattered: C. mysticus ). Stripes on 3 and 5 (if present) interrupted, intervals 2, 4, 6 occasionally ( C. grebennikovi ) with scattered green scales. Ventral side of head and pronotum green or grey ( C. mysticus ), meso-and metapleura green, meso- and metanotum and abdomen cupreous. Femora brown-cupreous to brown, proximal portion and ventral surface with green scales, middle portion occasionally with oblique deep-brown or cupreous bands. Tibiae external surface cupreous, brownish-cupreous or grayish-cupreous.

Head. Rostrum elongate or weakly elongate [RL/RW: 1.11–1.31], parallel-sided. Pterygia not or weakly ( C. mysticus ) extended beyond contour of rostrum. Antennal sockets dorsal. Antennifers entirely visible in dorsal view. Lateral carinae convex or weakly convex ( C. mysticus ). Epifrons very narrow, parallel-sided, at the level of antennal articulation 1.8–2.0 x narrower than vertex, distinctly sloping at sides, with convex median carina. Transverse sulcus deep, slightly or not concealed ( C. mysticus ) by dense scaling dorsally and laterally. Anterior portion of epifrons not steep, without median sulcus. Frons horizontal, glabrous, bare, with 4 frontal setae. Epistome broadly U-shaped or triangular, convex, generally delimited by narrow carina, bearing 2 epistomal setae; rarely ( C. mysticus ) epistome not delimited by carina, fused with frons in fronto-epistome, triangular or U-shaped, strongly convex, bare, coarsely punctate, its posterior margian reaches the antennal articulation level. Prementum with 2 setae. Eyes orbicular, large, sublateral, moderately convex, highest at the middle [FW/ELD: 0.67–1.07]. Vertex broad (occasionally in males narrow), flat. Frontal fovea deep, furrow-shaped, concealed or not concealed by scales.

Antennae. Scape extended behind anterior edge of pronotum, evenly curved and widened distally. Funicular segment 1 as long as 2nd or ≈ 1.5 x as long as 2 nd ( C. mysticus ), funicular segments 3–7 oblong. Club broadlyspindle-shaped.

Thorax. Pronotum strongly transverse, evenly slightly convex at sides, more or less constricted at apex, widest at middle or in posterior half [PL/PW: 0.71–0.87]. Disc weakly convex, occasionally with 2 shallow sublateral depressions. Posterior setal fringe consists of round plumose setae, not hidden by posterior edge of pronotum. Tergosternal sutures complete or obsolete ( C. mysticus ). Metanepisternal suture obsolete posteriorly.

Elytra. Oval to broadly oval or cordate ( C. mysticus ) [EL/EW 1.00–1.37], anterior edge arcuate, abrupt or not steep, narrowly rounded or acute; disc strongly convex [EL/BH: 1.38–1.61]. Subscutellar callosities hidden by scales, with 2 tiny tubercles. Intervals flat. Anterior portion of striae 1 with regular row of tiny tubercles.

Legs. Femora unarmed, clavate, swollen in middle. Protibiae and mesotibiae curved or straight, not widened at the apex; interior edge arcuate, without teeth in distal portion. Metatibiae interior edge finely serrate. Mucro well developed, thorn-shaped, acute. Setal comb of protibiae consists of 9–10 black setae not extending beyond external edge of tibiae; bevel of metatibiae narrow, surface bare. Tarsi robust; setose pelma well developed; tarsomere 2 triangular, 1.5 x as long as wide; 3 with two wide lobes; tarsomere 5 of metatarsus extending beyond apical lobes of 3rd by length of the last one. Claws connate in basal half.

Abdomen. 1st and 2nd ventrites fused but with distinct immovable suture. Posterior margin of 1st ventrite straight. 2nd ventrite 1.5–2 x as long as 3rd one, posterior margin of 2nd ventrite straight. 5th ventrite in male flat, in female weakly convex near the apex; apical edge in male broadly rounded, in female acute.

Male genitalia. Median lobe parallel-sided, tubular, in apical third evenly narrowed anteriad; apex attenuate, acute, strongly laterally compressed; body 0.7–1.3 x as long as apodemes. Internal sac without spiculate fields, with large, long aggonoporium consisting of two stick-shaped symmetrical lobes connected proximally by transverse bridge and long, slender ventral process. Ostium triangular, moderately sclerotized or absent. Ligulae membranous (transparent) or heavily sclerotized. Tegmen with long parameres, fused at base, basal piece narrow, apodeme 0.75–0.50 x as long as apodemes of median lobe.

Female genitalia. Coxites heavily sclerotized, dorso-ventrally curved, with or without ( C. mysticus ) heavily sclerotized dorsal baculi, evenly covered with pores, without sensilla. Styli well developed, stick-shaped, bearing 1 seta. Spermatheca moderately sclerotized, with short broad ramus, collum. Corpus large, slightly swollen. cornu thick, extended or not extended ( C. mysticus ) beyond corpus. Tergite 8 subtrapezoid, with curved fringe of multiple, tenuous, short setae at the apex; connecting membrane without sclerotized fields. Sternite 8 thick. Lamella sharply narrowed and acute without setae, knife-shaped, heavily sclerotized; apodeme thick; caput small.