Aegognathus waterhousei Leuthnerı 1883

Ríos-Málaver, Juan Sebastián Dueñas Cáceres ı Cristóbal & Grossi, Paschoal Coelho, 2019, Taxonomic contribution on the Andean species of Aegognathus (Coleoptera: Lucanidae) with two new species from Colombia and Peru, JOURNAL OF NATURAL HISTORY 53 (35), pp. 2145-2164 : 2148-2150

Aegognathus waterhousei Leuthnerı 1883

( Figs. 1A; 3A; 4 Aı C; 5A)

Type material ( Figure A1 (a)). Holotype male examined by pictures labelled: (a) white typed and green bordered labelı ‘ Peru /79 17 ’; (b) white type labelı ‘ 162 ’ (c) illegible (d) red-circled label; ‘ Type ’ ı (e) White typedı handwritten labelı ‘ Aegopsis [sic] waterhousei Type. 1 3 ’ ( NHM).

Additional material. Peruı Arpayoı Satipoı Junínı ii. 2008ı G. Pross. 13 ( CERPE)

Diagnosis. Body entirely black with some bluish and reddish reflections. Head and pronotum finely punctate. Mandibles with truncate to rounded apex. Elytra strongly punctate with yellowish scale-like setae. Last abdominal ventrites carinate along lateral marginsı also presenting a transverse carina on the anterior margin of ventrites III-V. Last abdominal ventrite presenting two lateral tubercles with a group of setae at the apex. Aedeagus almost four times longer than wideı cross bar ‘ X ’ shaped with two acuminate projections at the posterior margin.

Redescription Holotype. Size: Total length. 29 mm Total width. 9 mm. Colour: Body surface dorsally black at first sightı with some small dark-red areası one near base of mandibles and three along pronotum. Elytra mainly blackı with black-red tones across the posterior portion. Legs with some dark-red tones on femora. In ventral view blackı with dark-red areas on genaı near base of mandiblesı canthusı mentumı gulaı coxae and along lateral margins of abdominal ventrites. Head: Shape transverse; surface shagreenedı apparently glabrous but presenting small yellowish to somewhat white setae; temporal process presentı roundedı mainly visible in lateral and ventral view.Mandibles as long as the head and first half of pronotumı strongly bent inwards with an almost truncate to rounded apex; with a median strong upwards directed toothı rounded at apex; basally with three unequal teeth. Pronotum: Surface shagreenedı with a longitudinal weak discal grooveı almost glabrous except for sides; anterior angles almost acute; posterior angles somewhat sinusoidal. Elytra: Surface uniformly punctateı punctures coarseı denseı with erect yellowish dendritic setaeı becoming longer and denser posteriorly; epipleural punctures large and denseı with small yellowish setae. Legs: Protibiae externally serrate with four strong distal teethı one apical inner tooth. Mesotibiae and metatibiae with four distal teeth. Venter: Mentum trapezoidalı with a transverse anterior grooveı punctate with small yellow appressed setae. Gena finely punctate presenting a transverse but curved posterior carina. Prosternum with a continuous line of yellowish setae over the anterior margin; surface punctate with strongly curvedı to appressed setaeı strongly punctate over the anterior region. Mesoventrite punctateı with small appressed setae; punctures denser at the median region. Metaventrite less punctate than prosternum and mesoventrite; discrimen present as a continuous line from the posterior margin of mesocoxae to the posterior margin of metaventriteı forming an oval groove. Abdominal ventrites with fine to moderate punctures; surface sparsely to moderately punctate; margins slightly carinateı last ventrite more densely punctate with a group of apical setae. Ventrites III-V presenting a transverse carina located at the anterior marginı carina stronger on ventrite V; ventrite V with two lateral conical tuberclesı with tufts of setae at apex ( Figure A3 (a)). Genitalia ( Figure A4 (aıc)): Aedeagus symmetricı very elongateı distinctly slender; basal piece somewhat rectanguları sides concave over the anterior regionı convex posteriorlyı with rounded angles; disc with a distinct translucent area; 2.0 times longer than the paramere length. Median lobe almost cylindricalı lateral margins setose; cross bar X-shaped ( Figure A5 (a))ı with two somewhat acuminate projections at posterior region near median axis. Parameres in lateral view concaveı with rounded apex. Internal sac 1.5 times shorter than parameres and basal piece togetherı with a paired longitudinal strap-like scleritesı widened distallyı ending just before the apex. Apex cylindricalı completely covered by microspiculesı giving a sclerotised appearanceı bulbousı with a tubular distal expansion ending in the gonopore.

Additional material

One specimenı same data as holotypeı except for 27 mm in length and 8.8 mm in widthı presenting bluish reflections along elytral disc but also presenting the black-red tones across posterior region. Additionaly minor males remain unknown.

Description female

Unknown to usı but given the similarity between males of one of the new species described belowı we expect the same similarity among femalesı with the possibility to have mixed females of A. waterhousei and females of the new species described in this articleı within collections.

Distribution. Central Cordillera of Peruı Páramo province ( Morrone 2015)