Brasilplatus bahianus Oliveira, Linzmeier & Konstantinov, 2021

De Oliveira, Denize Wgliana G., Linzmeier, Adelita M. & Konstantinov, Alexander S., 2021, Discovery of the first leaf litter inhabiting flea beetles in Brazil (Coleoptera: Chrysomelidae: Galerucinae) with description of two new genera and three new species, Zootaxa 5068 (1), pp. 99-114 : 104-105

Brasilplatus bahianus Oliveira, Linzmeier & Konstantinov , new species

( Figs 1–13 )

Description. Body 2.5–2.7 mm long and 2.1 mm wide (N=3). Body, except antennae and tibiae dark brown. Antennomeres I to IV brown, V to IX dark brown, X and XI yellowish. Tibiae brown. Antennal calli not separated from rest of head surface by grooves or sculpture, quadrate, punctured as vertex. Midfrontal sulcus distinct; supracallual and suprantennal sulci shallow; supraorbital sulci shallow reaching eye margin. Antenna short; antennomere I longest, almost length of antennomeres II and III together, slightly wider at apex; antennomere II rounded; antennomeres III to V longer than wide, decreasing in length; antennomere VI the smallest; antennomeres VI to X moniliform, densely pilose; antennomere XI with acute apex. Pronotum rectangular, 1.8 times wider than long. Elytra with first to third striae reaching elytral apex; fourth and fifth striae merging at medial third; sixth and seventh striae terminating at end of middle third; eighth stria reaching apex; ninth stria with deeper punctures at base becoming shallower to apex and terminating before apex ( Figs 1 , 5 ). Elytra with three small, rounded patches of white setae arranged as follows: one anterior between fourth and sixth striae, two medially between first and third striae and between sixth and eighth striae ( Fig. 1 , 5 ). Median lobe of aedeagus with lateral margins parallel and convergent to apex; internal sac of aedeagus with sparse pilosity and microsculpture ( Figs 9, 10 ). Tignum with distal area wide, rectangular, basally sclerotized, with long setae on apical margin ( Fig. 13 ). Vaginal palpi parallel, sides of each slightly divergent, with setae on apex; external margin on apical third slightly inflated, then oblique to rounded apex ( Fig. 12 ). Bursa copulatrix membranous, without sclerites, except ring with small, sclerotized plicae proximally. Spermathecal receptacle oval, less sclerotized than pump and canal; pump longer than receptacle, with apical projection elongate and curved; canal deeply curved ( Fig. 11 ).

Etymology. The specific epithet is an adjective (ethonym) to designate that it originated from the state of Bahia, Brazil, the state where the specimens were collected.

Type Material. Holotype: female ( DZUP): / Brasil-BA; Jequié (Brejo Novo); REF. SP 87; 13º56’41”S e 40º60’33,9W; XII/2008 - Mata de Cipó ; Carneiro, M.A.F . / Holotype, Brasilplatus bahianus Oliveira, Linzmeier & Konstantinov, 2021 sp. nov. [red label].

Paratypes (2): male ( DZUP): same label as holotype, except REF. SP 18 and yellow paratype label [microvial with aedeagus; left antenna broken; head naturally damaged]; female ( UFFS-RE): same label as holotype, except yellow paratype label [microvial with female genitalia; left antenna broken; left metatibia broken; right metatarsomeres broken] .

Figures

FIGURES 1–4. Brasilplatus bahianus Oliveira, Linzmeier & Konstantinov, new species, paratype, male, habitus. 1, dorsal view. 2, lateral view. 3, frontolateral view. 4, frontal view.

FIGURES 5–8. Brasilplatus bahianus Oliveira, Linzmeier & Konstantinov, new species, holotype, female. 5, habitus, dorsal view. 6, habitus, lateral view. 7, habitus, frontal view. 8, antenna.

FIGURES 9–13. Brasilplatus bahianus Oliveira, Linzmeier & Konstantinov, new species. 9, median lobe of aedeagus (ventral and lateral views). 10, apex of median lobe of aedeagus (lateral view). 11, spermatheca. 12, vaginal palpi. 13, tignum.