Incadorcus ashaninka, Grossi

Grossi, Paschoal Coelho, 2011, Review of Incadorcus Arnaud & Bomans with the description of three new species from the Yungas of Peru and Bolivia (Coleoptera: Lucanidae: Lucaninae), Zootaxa 2750, pp. 1-14 : 4-6

Incadorcus ashaninka, Grossi new species

( Figs. 9, 10 , 17 , 27 , 36 )

Type material. Holotype male (dissected with microvial pinned just below the specimen) ex. Everardo and Paschoal Grossi Collection, EPGC, deposited at Coleção Entomológica Padre Jesús Santiago Moure, DZUP, Universidade Federal do Paraná, Curitiba, Brazil labeled: a) “ PERU, Junin, Satipo / San Luis, I-2009 / 1800 m, M. Dieguez”; b) “Coleção / E. & P. Grossi”; c) red label “ Incadorcus ashaninka / (3) / Grossi / HOLOTYPE ”. Allotype female ex. EPCG deposited at DZUP and labeled as holotype except for the yellow allotype label and female symbol: “ Incadorcus ashaninka (Ƥ) / Grossi / ALLOTYPE”. Paratypes: 1 male and 1 female paratype at EPGC labeled: a) “ PERU, Junin, Satipo / San Martin de Pangoa / Cerro Arpayo, X-2009 / 2000 m, M. Dieguez”; b) “Coleção / E. & P. Grossi”; c) yellow label “ Incadorcus ashaninka / (3 or Ƥ) Grossi / PARATYPE ”. One male at EPGC labeled as holotype except VIII-2009 / local collector. Four males and 4 females at EPGC and MJPC labeled: PERU: JUNÍN Region: / Satipo Province; pobl. / Rio Venado; 1300m / 16–17 October 2009.

Description, holotype male ( Fig. 9 ). Length: 19.0 mm. Width: 7.0 mm. Color: Dark brown with some lighter areas on head (frons); vertex dark. Mandibles dark brown. Elytral midline with blue reflections along disc; venter darker than entire dorsal surface. Head: Form almost quadrate, about 1.7x wider than long. Surface finely punctate; punctures fine, almost invisible. Anterior margin of head apparently concave at middle, but slightly convex; sides anteriorly produced, rounded. Canthi surrounding eyes until the apex of the first sixth; externally rounded with a weak emargination, internally slightly concave. Temporal process pronounced laterally, somewhat quadrate; posterior side weakly concave. Mandibles as long as head, externally rounded, slender, upturned and inwardly curved. Dorsal carina reaching apex; lateral furrow extending until middle, deeper and wider at base. Left mandible with a sub triangular flattened internal expansion with 7 conjoined rounded teeth, the basal 4 more distinct; base of expansion with a convex tooth; internal basal face carinate; carina at middle with a columnar vertical trituberculate process; basal tooth somewhat rounded, dorsally carinate. Right mandible with 6 conjoined rounded teeth, increasing in size to base; apical third simple, more inwardly curved; basal tooth bifurcate with apical tooth acute and basal tooth rounded, dorsally carinate; carina extending until sixth internal tooth. Mentum trapezoidal, transverse, moderately densely punctate; punctures moderate. Antennae with scape somewhat backwards curved; flat dorsally and with no dorsal carina. Pronotum: Surface opaque, punctate; punctures fine. Anterior angles acute, reaching posterior side of temporal process; lateral angles widely rounded; posteriorly with right angles. Disc weakly depressed, flat. Lateral and posterior margins distinct; anterior margin incomplete at median pronotal third, anteriorly with yellowish-white band of setae. Elytra: Integument surface smooth medially on disc. Elytra from suture to lateral side with 4 distinct striae present, then completely and densely punctate; punctures fine to large, each with a scalelike, centered seta. First and second interstriae very finely punctate; punctures larger on elytral declivity. Third and fourth interstriae almost smooth on disc, becoming punctate anteriorly and posteriorly; punctures fine, moderate, denser on elytral declivity. Humerus weakly angulate. Epipleuron flattened, especially at middle and with elongate yellowish-white setae; posterior margin densely setose. Legs: Protibiae with 4 well-developed external teeth; teeth increasing in size distally. Externally serrate near base; teeth subequal in size, flat and forward directed. Internal margin rounded near base. Mesotibiae with 1 spine-like tooth, just after middle; ventral mesotibial spur with apex slightly incurved. Metatibiae with 1 small tooth after middle, tooth almost imperceptible; apex in dorsal view acute. Genitalia: Genital capsule simple. Aedeagus symmetric ( Fig. 36 ). Basal piece 1.5 times longer than parameres length. Parameres distally rounded, with scattered setae; median lobe elongate, apex wider than base, with a narrow emargination medially to the end of the first third; laterally less sclerotized. Everted internal sac shorter than parameres and basal piece length combined, almost membranous, and with a paired internal strap-like sclerite; sclerite ending at the apex of the first half; apex extremely dilated, darker than the remaining internal sac; gonopore large, as wide as median lobe width.

Description, allotype female ( Fig. 10 ). Length: 18.7 mm. Width: 5.1 mm. Differing from the holotype male in the following characters. Head: Shorter, quadrate; surface shiny, completely and densely punctate; punctures moderate, being finer at vertex; temporal process absent; frons slightly declivous, flat. Mandibles shorter than head, asymmetry less evident (apparently symmetric); dorsal furrow reaching apex, basally wider and deeper; internal face with 1 strong and rounded tooth at dorsal margin and 2 smaller teeth at ventral margin. Pronotum: Shape less transverse; surface more punctate, especially at lateral and posterior margins; punctures moderate. Elytra: Epipleuron less setose with shorter setae. Legs: Mesotibiae with 2 proximal smaller teeth. Metatibiae with 1 external spine-like tooth; apex in dorsal view dentate.

Description, variation in male and female paratypes. Males. Length: 16.0–20.0 mm. Width: 5.8–7.3 mm. The males paratype do not differ significantly from the holotype except by the reduction in the number of conjoined teeth in mandibles. Females. Length: 15.0–18.5 mm. Width: 5.0–5.7 mm. The female paratypes do not differ significantly from the allotype.

Epithet. The specific epithet is tribute to the largest indigenous group, the Asháninka , who inhabit the Junín region, and who are the main group responsible for the forest preservation at the place where the new species was found.

Remarks. This species is very similar to I. zugeri , with which it has been confused. The specimens used in the description were labeled as Incadorcus zugeri “black form”, but they are readily distinguished by the elytral punctures and color. The aedeagus of this species is also unique within the genus, with the apex of the everted internal sac extremely differentiated apically. Incadorcus ashaninka and I. zugeri are the largest members of the genus and have disjunct ranges, the new species with the more southerly distribution.

Figures

FIGURES 9 – 14. Dorsal habitus of Incadorcus species. 9 – 10 I. ashaninka, male and female. 11 – 12 I. michellae, male and female. 13 I. ayamaranus, male. 14 I. paulseni, male.

FIGURES 15 – 18. Mandibles, head and pronotum of male of Incadorcus species. 15 I. zugeri. 16 I. shaunai. 17 I. ashaninka. 18 I. damasoi.

FIGURES 23 – 30. Left elytra of male of Incadorcus species. 23 I. zugeri. 24 I. shaunai. 25 I. cuzcoensis. 26 I. damasoi. 27 I. ashaninka. 28 I. michellae. 29 I. ayamaranus. 30 I. paulseni.

FIGURES 31 – 38. Ventral habitus of aedeagus of Incadorcus species. 31 I. zugeri. 32 I. shaunai. 33 I. cuzcoensis. 34 I. damasoi. 35 I. michellae. 36 I. ashaninka. 37 I. ayamaranus. 38 I. paulseni.