Aegognathus dulima Cáceresı Ríos-Málaver & Grossiı, 2019

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 : 2150-2151

Aegognathus dulima Cáceresı Ríos-Málaver & Grossiı new species

( Figs. 1B ; 4 Bı D; 5B)

Holotype male labelled: Colômbiaı Tolimaı Ibaguéı Termales el Ranchoı Cañon del Río Combeimaı 31.viii.2014 ı 04° 36 ʹ 57.64 ” N; 075° 20 ʹ 15.45 ” Wı 2987 mı luminosa – Y. Gutiérrez & I. C. Ríos-Málaver. 13 ( CERPE)

Diagnosis. Body blackı with distinct bluish and reddish reflections. Head setose along the anterior margin. Eyes slightly emarginate; mandibles dorsally carinate at the baseı wavy internallyı with a subtriangular median tooth and two rounded basal teeth. Three longitudinal costae over the elytra. Abdominal ventrites with yellowish setaeı especially along ventrite V; Ventrite I-IV with wrinkled lateral margins. Genitalia small when compared with other Aegognathus speciesı with a short and flat everted sac.

Description Holotype ( Figure 1B ) Male. Size: Total Length. 12.5 mm. Total Width. 4.4 mm Colour: Head black; pronotum mainly blackı with dark-red spots over sidesı and blue reflections along median groove; elytra bluish to somewhat purpleı with reddish longitudinal lines. Venter almost entirely blackı mentumı trochanters and coxaeı with dark-red tones. Head: form transverse. Surface shagreenedı apparently smoothı with small yellowish setae. Anterior margin emarginateı with an interrupted line of yellowish setae; ocular canthus only reaching the first half of eye. Temporal process reduced. Mandibles as long as head and first third of pronotumı strongly incurvedı with a dorsal carina at base; wavy internal faceı with two rounded basal teethı and a median subtriangular acute toothı apex concave. Antennae 10 segmentedı lamellae with yellowish setae over distal region. Pronotum: Surface shagreened; anterior angles slightly rounded. Border completeı except for the median region over posterior marginı with a continuous band of yellowish setae along anterior and posterior margins. Disc with a longitudinal groove. Elytra: Longitudinal costae distinctı one along sutureı and two near the posterior edge but not reaching it; surface with large puncturesı denseı with small yellowish simple setaeı getting more distinct and erect posteriorly; epipleuron strongly and uniformly punctateı punctures coarseı with yellowish and erect to curved setae. Legs: Protibiae externally serrateı with several teeth along marginı increasing in size distallyı inner margin with one apical tooth and one spur. Mesotibiae with three external median teethı increasing in size distally; apex with four apical teeth and two spurs. Metatibiae with one external median tooth; apex as mesotibiae. Venter: Mentum trapezoidalı transverseı with a transverse grooveı moderately punctateı with small yellowish appressed setae. Gena punctate with a posterior carinaı densely punctateı with yellowish setae especially along prosternum. Prosternum with two continuous bands of setae along anterior and posterior margins. Mesoventrite with a group of setae densely distributed posteriorly. Metaventrite punctateı with yellowish appressed setae. Discrimen present as a continuous sutureı ending into a longitudinal posterior groove. Abdominal ventrites with yellowish setaeı especially along ventrite V; Ventrite I-IV with wrinkled lateral margins. Punctures moderate to coarse and somewhat dense. Genitalia ( Figure A4 (bıd)): Aedeagus symmetricı rounded proximallyı slightly divergent distally. Basal piece subtriangular; 2.0 times longer than parameres; Median lobe almost cylindricalı with slightly concave lateral margins; sides setose; cross bar ‘ X ’ shapedı on dorsal view with broader lobes over posterior portion ( Figure A5 (b)). Parameres in ventral viewı with inner margins slightly convex; almost straight on lateral view slightly rounded distally with an almost truncate posterior marginı setose. Internal sac 2.6 shorter than parameres and basal piece length togetherı poorly sclerotised; wider proximallyı narrower distally with two strap like sclerites joined at apical thirdı narrower distallyı with a cylindrical projection until the gonopore.

Female. Unknown.

Epithet

the specific epithet makes allusion to the ancestral name of ‘ El nevado del Tolima ’ volcanoı where the specimen was collected. ‘Dulima’ is the name that was given to this mountain by the ‘ Pijaoı ’ an indigenous group that inhabited the region in the pre- Columbian period. The name represents the goddess from the snow-covered peaks that protected the indigenous groupı it is used hereı as a noun in apposition.

Distribution. Northern Central Cordillera of Colombiaı Páramo province ( Morrone 2015)

Remarks. According to the original description made by Van De Poll (1886) ı Agognathus leuthneri was the first species described from Colombiaı howeverı the current infomartion places this species in Equadorı making A. dulima the first species described for Colombia. The specimen presents unique characteristics such as the dorsal carina present at the base of mandiblesı internal face of mandibles wavyı and the particularly small genitalia when compared with other members of the genusı showing a short and flat everted internal sac that lacks pigmentation.

Figures

Figure A1. (a) Aegognathus waterhousei, Holotype male in dorsal view. (b) Aegognathus dulima, holotype male in dorsal view. Scale bar 5 mm

Figure A4. Male genitalia. (a) Aegognathus waterhousei ventral view. (b) Aegognathus dulima n.sp. ventral view. (c) A. waterhousei lateral view. (d) A. dulima n.sp. lateral view. Scale bar 1 mm.

Figure A5. Cross bar struts dorsal view. (a) A. waterhousei. (b) A. dulima n.sp. Scale bar 1 mm.