Trogellus (Trogoides) chapinitus, 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 : 11

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Trogellus (Trogoides) chapinitus

new species

Trogellus (Trogoides) chapinitus Paulsen, new species.

Type Material. Holotype male ( FSCA) labeled: a) “ GUATEMALA: Dept. Zacapa / Sierra de los Minas : “El Naranjo” / S slope below San Lorenzo Mine; / 15.07329, -89.68481; 1600–1770m / at light; 21– 24.V.2010; oak forest; / P. Skelley, G. Steck, B. Sutton ”. GoogleMaps

Paratype female ( MJPC) labeled: a) “ GUATEMALA: Dept. Zacapa / Sierra de los Minas : “El Naranjo” / S slope below San Lorenzo Mine; / 15.07329, -89.68481; 1600–1770m / FIT; 21–24.V.2010; oak forest; / P. Skelley, G. Steck, B. Sutton ”. Two paratype females ( WBWC) labeled: a) “ Guatemala: Izabal, SE of / Morales, Finca Firmesa 2 / 15 o 21’51”N, 88 o 41’28”W / elev. 3880’, vi-21–22-2001 ” GoogleMaps ; b) “ W.B. Warner, / J. Monzón-Sierra / & R. Cunningham / UV, MV & MH light” .

Non-type specimens. One female ( RHTC) labeled: a) “ HONDURAS: Yoro / PN Pico Pijol / mv + bl, 22 July / 2001, R. Turnbow”.

Description. Holotype male. Length: 5.0 mm. Width: 2.6 mm. Head: Canthus long, length approximately 2× width. Clypeus triangular, apex not distinctly produced. Mentum bifoveate. Mandibles weakly dentate externally at angulation. Pronotum: Surface densely punctate, with distinct tubercles posterolaterally at base of bristles; punctures moderate in size, ocellate. Metasternum: Punctures anterolaterally moderate in size. Elytra: Surface with blunt bristles, bristles moderately long (distinctly longer than 4 th tarsomere). Legs: Protibiae tridentate, teeth narrow, weak; margin between teeth nearly flat (between 2 apical teeth more concave). Mesotibia with 3 external teeth (proximal tooth smaller) and acute apex. Metatibia straight, with 1 small median tooth and 1–2 smaller teeth proximally; apex acute. Male genitalia: Parameres broad and elongate, over 1/2 as long as median lobe, located on side of median lobe; median lobe symmetrical, with large triangular lateral processes at distal third, processes with distal margin curved towards base ( Fig. 21 View Figures 18–23 ).

Paratypes vary as follows: Length: 4.2–5.7 mm. Width: 2.4–3.0 mm. Legs: Mesotibia with 2–3 external teeth (proximal teeth smaller). Metatibia with external teeth almost obsolete, or 1–2 small teeth; metatibiae of females with tumid apex. Female genitalia: Styli long, peg-like, truncate at apex.

Distribution. GUATEMALA: Izabal (2): Morales- Finca Firmesa; Zacapa (2): Sierra de los Minas / San Lorenzo Mine. HONDURAS: Yoro (1): Pico Pijol.

Temporal Distribution. May (2), June (2), July (1).

Diagnosis/Remarks. This species is similar to T. hawksi externally, but it has smaller punctures on the metasternum. It is also similar to T. maesi but has straight metatibiae. The female genitalia are distinctive between the three species, although the known male genitalia vary only in the basal margin of the triangular processes being curved proximally or straight. An additional specimen from Pico Pijol, Honduras is not included in the type series but at present is referable to this species.

Etymology. The specific epithet is a Latinized form of the term ‘ chapin’, a colloquial name for Guatemalans, with the diminutive suffix -ito used in that country, resulting in ‘ chapinito ’ and meaning ‘little Guatemalan’. It is used as a noun in apposition, and the gender is masculine.


Florida State Collection of Arthropods, The Museum of Entomology


Departamento de Geologia, Universidad de Chile


Departamento de Biologia de la Universidad del Valle


University of Montana Museum


Naturhistorisches Museum, Basel