A new genus for the Neotropical species of Aesalus Fabricius, with descriptions of eight new species (Coleoptera: Lucanidae: Aesalinae) Author Paulsen, M. J. text Insecta Mundi 2013 2013-10-11 2013 325 1 25 journal article 10.5281/zenodo.5178341 1942-1354 5178341 158EEA07-5357-4F7B-B8DF-C1B77EFE4DCB Trogellus ( Trogellus ) neotropicalis ( Bates, 1886 ) , new combination . Aesalus neotropicalis Bates 1886: 2 , original combination. Type Material. Lectotype male ( BMNH ), here designated , labeled: a) blue-bordered, circular “ SYNTYPE ”; b) “Capetillo, / Guatemala , / G.C. Champion. ”; c) handwritten “AE salus / neotropicalis / Bates”; d) “B.C.A. / 2.2”; e) “Sp. figured.”; f) “ BMNH (E) / #608327”; g) red paper “ Aesalus / neotropicalis / Bates, 1886 [male symbol]/ LECTOTYPE / des. M.J. Paulsen ”. Paralectotype [male or female symbol] pair (glued on card, BMNH ) labeled: a) as lectotype ; b) redbordered circular “ TYPE ”; c–e) as b–d of lectotype ; f) “H. Bomans det., 1986 / [ Aesalus / neotropicalis / Bates”; g) yellow paper “ Aesalus / neotropicalis / Bates, 1886 [male or female symbol] / PARALECTOTYPES / des. M.J. Paulsen”. Paralectotype [male or female symbol] pair (glued on card, BMNH ) labeled as previous pair but without label b. Paralectotype male ( FMNH ) labeled: “ Guatemala / City / Champion.”; b) handwritten “ Aesalus / neotropicalis / co-type Bates”; c) ”Chicago Nat Hist Mus / B. Benesh Colln. / Lucanidae (Benesh / Access No._); d) yellow paper “ Aesalus / neotropicalis / Bates, 1886 [male symbol] / PARALECTOTYPE / des. M.J. Paulsen”. Paralectotype female ( CNCI ) labeled: a) “ Guatemala / City / Champion.”; b) “B.C.A. / 2.2.”; c) “COTYPE / [8234] / CNCNo. / [ A. neotropicalis / Bates]”; d) [ Aesalus / neotropicalis / Bates] / DET. at B.M. / H. F. Howden ‘62”; e) yellow paper, “ Aesalus / neotropicalis / Bates, 1886 [female symbol]/ PARALECTOTYPE / des. M.J. Paulsen”. All specimens with my determination label: “ Trogellus / neotropicalis / ( Bates, 1886 ) / det. M.J. Paulsen 2013”. Description. Lectotype male: Length : 4.1 mm . Width : 2.2 mm . Head : Clypeus triangular with distinctly produced, tooth-like apex. Canthus elongate, length approximately 2× width. Mandibles with external median tooth at angulation. Pronotum : Surface densely punctate, with fine tubercles evident anterolaterally; punctures moderate in size. Elytra : Surface with acute bristles, bristles relatively long (distinctly longer than canthus). Legs : Protibia tridentate, teeth triangular, sharp. Mesotibia with 2 strong, external teeth and acute apex. Metatibia with 1 large median tooth and acute apex. Male genitalia : Parameres 2/5 as long as median lobe. Median lobe more or less symmetrical, cylindrical and tapering before spatulate, less sclerotized apex ( Fig. 20 ). Variation in other specimens. Length : 3.8–4.2 mm . Width : 2.0– 2.3 mm . Legs : Metatibia with external tooth weaker in females. Distribution. GUATEMALA : Guatemala (3): Guatemala City . Sacatepéquez (5): Capetillo. Temporal Distribution. No data (8). Diagnosis/Remarks. At around 4mm in length, this species is distinctly smaller than most other species of Trogellus . It is immediately recognizable among the Guatemalan species due to its acute elytral bristles and stronger protibial teeth. Bates (1886) indicated that a series was collected by “beating the withered leaves and boughs of fallen forest trees”. No recent specimens have been examined. Maes (1992) included Veracruz , Mexico in this species’ distribution, but that specimen is part of a new species described below, and T. neotropicalis is not known from Mexico . The lectotype male from the original syntype series in the BMNH has a label indicating that it was the specimen illustrated in the BCA by Bates (1886) .