Acroleptus chevrolati Bourgeois, 1886

Ferreira, Vinicius S., 2020, Revision of Acroleptus Bourgeois, 1886 and descriptions of New Acroleptina taxa (Coleoptera, Lycidae, Calopterini), Journal of Natural History (J. Nat. Hist.) 53 (45 - 46), pp. 2739-2756 : 2746-2747

Acroleptus chevrolati Bourgeois, 1886

Figures 1 – 3, 16, 25.

Acroleptus chevrolati Bourgeois, 1886 : LXX; Kleine 1933: 34; Blackwelder 1945: 348; Bocakova 2003: 231 figs. 20, 37, 72, 73, 114 – 116.

Type material examined (2). Lectotype and paralectotype (hereby designated to preserve stability of nomenclature, in accordance with ICZN (1999) Art. 74.7). 1 ♂ Lectotype: Coll. R. I. Sc. N. B.; Brazil; Coll. Guér-Mén./n. g.; chevrolati; Guer/Lycus; gns 13/ Acroleptus ; chevrolati Brg 1885 ; det. Bourgeois/Type/ LECTOTYPE; Acroleptus chevrolati Bourgeois, 1886 ; det V.S. Ferreira 2019 ( IRSB). 1 ♂ Paralectotype: Coll. R. I. Sc. N. B.; Brazil; Coll. Guér-Mén.; Rio Janeiro, 8.12; Coll. Camille; Van Voixem./ Acroleptus ; chevrolati; ♂. Bourg.; 1886/Type/ PARALECTOTYPE; Acroleptus chevrolati Bourgeois, 1886 ; det V.S. Ferreira 2019

( IRSB). Material examined in addition to type (2) . 1♂: MUSEUM PARIS; MINAS GERAES; CLAUSSEN 9-43/9 − 43/ Acroleptus chevrolati ♀ Bourg (MNHN) . 1♂: Rio de Janeiro; Organ Mts .; near Tijuca ; S .R. Wagner .; 1902-287/ Determined from; description C .J.G.; Acroleptus ; chevrolati; Bourg. ( BMNH).

Diagnosis. The pronotum and humeral lateral margins yellow ( Figure 1), elytral cells subquadrate ( Figure 2) and the phallobase of male genitalia with median suture incomplete, present only in apical half, distinguishes ( Figure 16) A. chevrolati from other members of the genus.

Redescription. Head dark brown ( Figure 3). Antennae reaching middle of elytra, densely setose; flabellum of antennomere III and IV subequal in length with their respective stems; flabellum of antennomere V – X about 2.5x longer than stem. Pronotum dark brown, lateral margins yellow ( Figures 1, 2). Elytra: dark brown, except by humeral region yellow, subparallel, 7x longer than pronotum; reticulate, cells subquadrate, with four elytral costae reaching apex of elytra ( Figure 1). Male genitalia bilaterally symmetrical; exposed portion of median lobe twice the length of parameres, slightly tapered towards apex, rounded apically, with a membranous round structure in the apex of median lobe; folds in the basal inner margin of median lobe weakly developed; phallobase elongate, lateral margins subparallel, posterior margin round, with median suture incomplete, present only in apical half ( Figure 16).

Length (pronotum+elytra): 4.6 – 5.2 mm. Width (across humerus): 1.1 – 1.4 mm.

Distribution. Rio de Janeiro and Minas Gerais, Brazil ( Figure 25).

Type locality. Rio de Janeiro, Brazil .

Remarks. The label of the MNHN specimen indicates that the specimen is a female. The specimen has been already dissected and examined by someone else before this study, and the terminalia is missing from the specimen. Examination of other external morphological characters do not support that this specimen is a female.