Trogellus (Mayaesalus) trifinius, 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 : 17-18

Trogellus (Mayaesalus) trifinius Paulsen, new species.

Type Material. Holotype male ( UNSM) labeled: a) “ EL SALVADOR: Santa Ana / Parq Nac Montecristo / VI-20–21-2002 2175m / N 14 o 24’33” W 89 o 22’20” / B. Ratcliffe, M. Jameson, R. Cave / A. Smith, F. Ocampo, M. Paulsen ”; b) “ UNSM SCARAB DNA / VOUCHER SPECIMEN / [AS62 / SEPT. / 2002”; c) “DNA VOUCHER / MAR07 MP334 ”; d) red label, “ Trogellus / trifinius / Paulsen [male symbol] / HOLO- TYPE ”.

Description. Holotype male. Length: 5.7 mm. Width: 3.2 mm. Head: Frons flat, punctate; punctures large, separated by 1/2 to 2 diameters. Clypeus subtriangular, rounded, apex not produced. Frons distinctly flattened, subconcave. Canthus short, length subequal to width. Mandibles each with 1 strong internal tooth, externally lacking tooth at angulation. Pronotum: Lateral margin explanate in anterior view. Surface densely punctate, lacking tubercles at base of bristled punctures; punctures large. Elytra: Surface with blunt bristles, bristles short (shorter than distance to next bristle in row). Legs: Protibiae quadridentate, teeth subtriangular and decreasing in size proximally, margin between teeth weakly concave. Mesotibia not present. Metatibia with 1 large median tooth; apex acute. Male genitalia: Parameres narrow and short, 1/3 as long as median lobe; median lobe asymmetrical, bulbous after middle ( Fig. 26, 30 ).

Distribution. EL SALVADOR: Santa Ana (1): Parque Nacional Montecristo.

Temporal Distribution. June (1).

Diagnosis/Remarks. This species is distinguished from T. narizotus by its subtriangular clypeus. It shares a subtriangular clypeus with T. catrachitus but differs from that species in the structure of the median lobe of the male genitalia. In T. trifinius , the median lobe is bulbous medially, and the membranous apical portion is larger and less sclerotized. It also has distinctly stronger teeth on the protibia, shorter bristles on the elytra, a flattened frons, and a broader ocular canthus.

Etymology. The specific epithet is a Latinized form of the term ‘ Trifinio’, the name of the region around Montecristo Massif on the borders of El Salvador, Guatemala, and Honduras. It is used as a noun in apposition, and the gender is masculine.

Figures

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.