Trogellus (Mayaesalus) narizotus, Paulsen, 2013

Paulsen, M. J., 2013, A new genus for the Neotropical species of Aesalus Fabricius, with descriptions of eight new species (Coleoptera: Lucanidae: Aesalinae), Insecta Mundi 2013 (325), pp. 1-25 : 16-17

Trogellus (Mayaesalus) narizotus Paulsen, new species.

Type Material. Holotype male ( UNSM) labeled: a) “ GUATEMALA: Sacatepéquez: / Antigua, Cerro Carmona, Finca / El Pilar ; N14 o 32’16.9”, / W90 o 41’43.1”; 2100m; ex pine / log, M.J. Paulsen; 4.VII.2009 ”; b) red paper, “ Trogellus / narizotus [male symbol] / Paulsen, 2012 / HOLOTYPE ”.

Two paratype males, 1 paratype incomplete female ( UVGC, MJPC) labeled a) as holotype ; b) yellow paper, “ Trogellus / narizotus [male or female symbol] / Paulsen, 2013 / PARATYPE ”.

Description. Holotype male (disarticulated). Length: 4.7 mm. Width: 3.0 mm. Head: Frons flat, punctate; punctures large, separated by 1/2 to 1 diameter. Clypeus rounded, apex distinctly produced ( Fig. 31 ). Canthus short, length subequal to width. Mandibles each with 1 strong internal tooth, denticulate at external angulation. Pronotum: Lateral margin explanate in anterior view. Surface densely punctate, lacking tubercles at base of bristled punctures; punctures moderate in size. Elytra: Surface with blunt bristles, bristles short (shorter than distance to next bristle in row). Legs: Protibiae tridentate, teeth small, margin between teeth concave. Mesotibia with 2 strong, external teeth subequal in size. Metatibia with 1 large, median tooth with 1 smaller tooth distally; apex acute. Male genitalia: Parameres narrow and short, 1/3 as long as median lobe; median lobe asymmetrical, with elongated ostium ( Fig. 24, 28 ).

Paratypes vary as follows: Length: 5.2–6.0 mm. Width: 3.0– 3.3 mm. Legs: Metatibiae of female unknown (partial specimen missing metatibiae). Female genitalia: Styli short, peg-like.

Distribution. GUATEMALA: Sacatepéquez (4): Antigua- Cerro Carmona.

Temporal Distribution. July (4).

Diagnosis/Remarks. This species is the most easily recognizable aesaline in Central America. The clypeal apex is produced and narrowly rounded ( Fig. 31 ), whereas in the other species of the subgenus the apex is not produced and subtriangular. The shape of the male genitalia is also distinct ( Fig. 24, 28 ). This is the only species in the subgenus for which a female is known, albeit from an incomplete specimen. The styli of the genitalia are much shorter than in those of other species studied, peg-like, and not hooked. I collected the entire series of one living and a few dead, disarticulated specimens and body parts in a decaying pine log.

Etymology. The specific epithet is a Latinized adjectival form of the Spanish term ‘ narizota’, meaning large nose. The gender is masculine.

Figures

Figure 31. Head of T. narizotus n. sp., showing the rounded and produced clypeal apex.

Figures 24–30. Male genitalia of Trogellus subgenus Mayaesalus species, dorsal (Fig. 24–26) and right lateral (Fig. 28–30) views. Outlines of genitalia in dorsal view shown to the right of each. 24, 28) T. narizotus, n. sp. 25, 29) T. catrachitus, n. sp. 26, 30) T. trifinius, n. sp.