Incadorcus ayamaranus, 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 : 6-8

Incadorcus ayamaranus, Grossi new species

( Figs. 13 , 21 , 29 , 37 )

Type material. Holotype male, ex. EPGC deposited at DZUP labeled: a) “ Bolivia, La Paz, Nor Yungas Province / Coroico, G. Pross”; b) “Coleção / E. & P. Grossi”; c) red label, “ Incadorcus ayamaranus (3) / Grossi / HOLO- TYPE ”. Two male paratypes deposited at EPGC. One male paratype deposited at MJPC, Lincoln, NE. Paratypes with same labels as holotype except for the yellow paratype label.

Description, holotype male ( Fig. 13 ). Length: 13.8 mm. Width: 5.2 mm. Color: Dark red with some parts of body black. Mandibles, head, pronotal margins, legs and venter black. Pronotum with 2 darkened maculae from posterior margin to discal area and two black lateral spots. Elytral disc darkened from suture to 4th striae. Head: Form almost quadrate, about 2 times wider than long. Surface finely punctate; punctures moderate. Anterior margin at middle straight, laterally produced, rounded. Canthus extending 1/3 of eye length in dorsal view, posteriorly rounded, internally concave. Temporal process present, weakly developed, rounded. Mandibles shorter than head, robust, externally rounded; apex upturned and incurved. Dorsal carina reaching apex; lateral furrow confined to basal third, narrow. Left mandible with apical subtriangular internally expanded tooth, tooth anteriorly declivous and with 3 conjoined smaller rounded teeth, posteriorly straight and with elevated transverse carina; from middle to base deeply concave, anteriorly with a small tooth; basal tooth well developed, apex rounded. Right mandible with 6 internal conjoined teeth increasing in size to base, basal tooth acute, above it with a dorsal subtriangular, convex tooth; basal tooth simply rounded. Pronotum: Surface shiny, sparsely punctate; punctures fine, being moderate to strong at lateral margins. Anterior angles nearly straight with carinate margin and internally concave. Anterior margin incomplete, ending before median third; anterior margin with a band of dark yellow setae below. Lateral and posterior angles rounded. Elytra: Integument surface smooth and shiny. From elytral suture to side with 5 distinct striae, after 5th stria surface completely punctate; punctures moderate, strong, and coalescent near epipleuron. First interstria basally with a row of moderate punctures for 1/5th of the length; sparsely punctate on disc, punctures fine; moderately punctate at elytral declivity. Second interstria apparently smooth and very finely punctate, at elytral declivity as 1st interstria. Third interstria with a row of moderate punctures for basal 1/3rd of length, then as 1st interstria. Fourth interstria as 2nd. Humerus with a small rounded tooth. Epipleuron somewhat flat and with both hairlike and scale-like scattered setae. Legs: Protibiae with 4–5 well developed external teeth; near base with 0–3 smaller teeth; teeth never reaching base. Internal margin slightly sinuate at base. Mesotibiae with one external well developed tooth and 2–3 small basal teeth. Metatibiae with 1 external tooth.

Description, paratype variation. Length: 11.7–12.7 mm Width: 4.3–4.6 mm. Color: Elytral disc in 1 paratype lighter in color, being more red with discal maculae almost totally obsolete. Head: Mandibles less dentate and less developed with conjoined teeth weakly defined. Genitalia: Genital capsule simple. Aedeagus symmetric ( Fig. 37 ). Basal piece1.6 times longer than paramere length. Parameres distally rounded with apex angulate and incurved, weakly setose; setae concentrated near internal apex; median lobe elongated and with laterally expanded apex; middle with a “V” shaped emargination and with translucent integument laterally; medially with a paired darkened area diverging to base; basally trifurcated. Everted internal sac shorter than parameres and basal piece combined, almost membranous, paired internal strap-like sclerites present, sinuous, ending just before apical third; apical third cylindrical and darkened with apex conical; gonopore medially sized and with an apical evagination.

Epithet. The specific epithet is an allusion to one of the native groups of the Andean region, the Ayamara, who also inhabit the region of Coroico where this new species was collected.

Remarks. Incadorcus ayamaranus and the third new species described below are the only species of the genus known from Bolivia. This shows that the genus has a wider distribution and that it is found in Yungas forests, which are one of the most diverse biomes in South America. Incadorcus ayamaranus resembles I. michellae from which it can be distinguished by the less convex elytra, less developed temporal process and less punctate elytra. Unfortunately the examined specimens had no temporal data, just the collecting locality.

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 19 – 22. Mandibles, head and pronotum of male of Incadorcus species. 19 I. cuzcoensis. 20 I. michellae. 21 I. ayamaranus. 22 I. paulseni.

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.