Cadoderus olivaceus Yunakov

Yunakov, Nikolai, 2012, 3535, Zootaxa 3535, pp. 1-104: 16-18

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Cadoderus olivaceus Yunakov

sp. n.

Cadoderus olivaceus Yunakov   , sp. n.

(figs 7, 8, 102–113, 365)

Diagnosis. Similar to C. grebennikovi   sp. n. and C. bellus   . From C. grebennikovi   sp. n. it differs by subocular row consisting of 4 setae; anterior and posterior elytral declivity with equally strongly erect setae; 2nd -3rd funicular segments with scattered scales; metatibiae with vestigial grooming brush; background scaling olivaceous; antennal funicle slender (1st funicular segment 1.42 x as long as 2nd; elytra rather broad and convex EL/EW average: 1.31, EL/BH average: 1.50 (in C. grebennikovi   sp. n. —1.36 and 1.42 respectively); median lobe tubular, in apical 1/3 sharply narrowed anteriorly, apex attenuate, narrowly rounded; 0.75 x as long as apodeme. From C. bellus   this new species differs by absence of alternate stripped pattern of elytral intervals 3–6; 1st funicular segment1.42 x as long as 3rd; median lobe apex of median lobe without dorsal process; spermatheca with rather long ramus.


Measurements. BL: 2.86–3.57 (3.15) mm, BW: 1.45–1.87 (1.61) mm, BH: 1.30–1.62 (1.41) mm.

Vestiture. Body densely covered only with overlapping, round scales, setose. Setae of head form oblique rows along lateral edges of epifrons (recumbent or subrecumbent) and above the eyes (erect). Subocular row consists of 4 setae. Temples with broad bare stripe. Posterior setal fringe consists of round, recumbent, plumose setae, not hidden by posterior edge of pronotum. Elytral intervals 1–6 with distinct row of setae. Anterior and posterior declivity with equally strongly erect, acute or truncate spatulate setae. Anterior declivity with setae half as long as interval width), posterior declivity with rather long, with setae as long as interval width. Ventrites densely squamose, anal ventrite with apical setal comb. Antennal scape setose and densely squamose; scales round; setae long, slender, acute, and erect. Funicle setose, 2nd–3rd funicular segments with scattered scales. Metatibiae with vestigial grooming brush; hairs short and almost recumbent. Tarsi setose and scarcely squamose.

Coloration. Integument of body brown to deep-brown; limbs deep-brown. Background scaling olivaceous; striped pattern formed by green scales. Dark and pale scales both with slightly pronounced pearl shine. Head dorsal surface olivaceous, with green stripes around eyes and antennal sockets; temples, anterior portion of epifrons, and pterygia green. Pronotum with 5 longitudinal green stripes. (1 discal and 2 dorso-lateral stripes narrow, pale; 2 lateral stripes broad and bright. Elytra background scaling olivaceous. Intervals 1, 5, 6 (posterior half), 7–11 green. Presutural stripes occasionally interrupted. Intervals 2 and 3 with green scales (at posterior declivity). Ventral side including genae, meso-and metapleura green; meso- and metasternum and abdomen green. Femora greyish-green, middle portion with oblique deep-grey-brown bands. Tibiae external surface grayish-cupreous.

Head. Rostrum weakly elongate [RL/RW: 1.16–1.20 (1.18)], parallel-sided. Pterygia not extended beyond contour of rostrum. Lateral carinae broadly strongly convex. Epifrons significantly narrowed from base to the level of antennal socket, than sharply sinuate, at the level of antennal articulation 2 x narrower than vertex, distinctly sloping at sides, with distinct median carina. Transverse sulcus deep, concealed by dense scaling at dorsal surface and at sides. Anterior portion of epifrons not steep, without median sulcus. Frons not declivous, glabrous, bare. Epistome convex, broadly arcuate, delimited by narrow carina. Eyes sublateral, broadly oval, moderately convex, highest at the middle [FW/ELD: 1.18–1.25 (1.21)]. Vertex broad, flat. Frontal fovea concealed by scales.

Antennae. Scape extended behind anterior edge of pronotum, evenly curved and widened. 1st funicular segment 1.42 x as long as 2nd; 3rd–7th oblong. Club spindle-shaped.

Thorax. Pronotum strongly transverse [PL/PW: 0.82–0.83 (0.83)], evenly slightly convex at sides, constricted at apex, widest at middle. Disc weakly convex longitudinally and transversally. Tergosternal suture concealed by scales. Metanepisternal suture concealed by scales, obsolete behind.

Elytra. Elytra broadly-ovate [EL/EW: 1.27–1.34 (1.31)], in male oval; anterior edge arcuate, vertical narrowly rounded; disc in male not convex, in female strongly convex [EL/BH: 1.46–1.54 (1.5)]. Subscutellar callosity interrupted, partly hidden by scales, with 2 tiny tubercles. Elytral intervals flat. Anterior portion of 1st striae with regular row of tiny tubercles.

Legs. Protibiae and mesotibiae strongly curved, not widened at the apex. Interior edge C-shaped, without teeth in distal portion. Metatibiae with small teeth. Mucro on meso- and metatibiae large, thorn-shaped, acute. Setal comb of protibiae consists of dense 10–11 black or deep brown short setae not extending beyond external edge of tibiae. Bevel of metatibiae narrowly enclosed; its surface bare. Tarsi robust; tarsomere 2 triangular, as long as wide; tarsomere 3 with two wide lobes; tarsomere 5 of metatarsus extending beyond apical lobes of 3rd by length of the last one.

Abdomen. Posterior margin of 1st ventrite straight. 2nd ventrite 1.5 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, lateral edges not fused, tubular, in apical 1/3 sharply narrowed anteriorly; apex attenuate, narrowly rounded; 0.75 x as long as apodeme. Internal sac without spiculate fields, with large, long aggonoporium consisting of two stick-shaped symmetrical lobes connected proximally by transverse bridge and long ventral thick process. Ostium absent. Ligulae heavily sclerotized. Parameres long, fused in base, basal piece of tegmen narrow, tegminal apodeme 0.75 x as long as apodemes of median lobe.

Female genitalia. Coxites heavily sclerotized dorso-ventrally curved, with heavily sclerotized dorsal baculi, evenly covered with pores, without sensilla. Styli well developed, stick-shaped, bearing 1 seta. Spermatheca moderately sclerotized, with oblong, thick ramus, collum slender, as long as ramus. Corpus large, slender; cornus thick, extended beyond corpus. Tergite 8 subtrapezoid, with curved fringe of tenuous multiple long setae at the apex. Sternite 8 thick. Lamella sharply narrowed and acute, without setae, knife-shaped, heavily sclerotized. Apodeme thick; caput small.

Distribution. Tanzania: Uzigua Forest; Nguru Mountains ( Fig. 365).

Bionomics. Montane rain forests.

Material examined. Tanzania: Holotype male, dissected ( MNHN) “ Zanguebar / Mhonde Ouziguua / A. Hacquard Mis. ap. / 1879. 1ar Trim”, Museum Paris / ex. Coll. Oberthür / 1952”   . Paratypes: 4♀, labeled as holotype, 1 female dissected; 1♀ ( CNC) Morogoro Reg., Nguru Mts. at Turani , h = 1277 m 06°04'29''S, 037°32'19''E, sifting03, V. Grebennikov leg., 31.x.2010 GoogleMaps   .

Etymology. The name is a Latin adjective meaning “olivaceous”.


Museum National d'Histoire Naturelle


Canadian National Collection of Insects, Arachnids, and Nematodes