Discodon tamoio Biffi & Geiser 2022, sp. nov.
Creators: name: Biffi, Gabriel
name: Geiser, Michael
Publisher: name: Zenodo
Year: 2022
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Coleoptera
Cantharidae
Discodon
Discodon tamoio

description: Discodon tamoio sp. nov.
urn:lsid:zoobank.org:act: A319DC64-B2FD-4853-A80E-CE88D46B5BC2
Figs 3F, 6I, T, 7I, 8I, 9I, 10I, 13A–C, 15I
Diagnosis
Antennae entirely black (Fig. 3F), last ventrite (VII) of males with a strongly prominent acute tip directed ventrally (Fig. 10I); the last ventrite of the females (VII) with a distal margin with two apical rounded lobes projecting posteriorly at middle (Fig. 15I).
Etymology
The specific epithet refers to the Tamoio indigenous people, that inhabited the same region as D. tamoio sp. nov., currently comprising part of the coast of São Paulo and Rio de Janeiro states, Brazil.
Type material
Holotype BRAZIL • ♂; São Paulo, Salesópolis, Estação Biológica de Boracéia; 23º39′14″ S, 45º53′25″ W, 24–28 Mar. 2011; Expedição MZUSP/FFCLRP leg.; MZSP 46470 (Fig. 3I).
Paratypes (14 specimens) BRAZIL • 1 ♂; São Paulo, Salesópolis, Estação Biológica de Boracéia; 23º39′15.63″ S, 45º53′22.38″ W, 8–12 Mar. 2013; F.F. Albertoni leg.; lâmpada mista [mist lamp]; MZSP 46472 • 1 ♂; same collection data as for preceding; DZUP 320985 • 1 ♂; same collection data as for preceding; 23º39′14.5″ S, 45º53′21.7″ W; 16 Mar. 2008; F.R. Fernandes leg.; MZSP 46474 • 1 ♂; same collection data as for preceding; UFMG-ICO-2200002 • 1 ♀; same collection data as for preceding; 23º39′02.6″ S, 45º53′32.1″ W; 23–27 Mar. 2012; F.F. Albertoni leg.; MZSP 46476 • 1 ♂; same collection data as for preceding; 23º39′14″ S, 45º53′25″ W; 24–28 Mar. 2011; Expedição MZUSP/FFCLRP leg.; MZSP 46471 • 1 ♂; same collection data as for preceding; 16–19 Feb. 2018; Expedição MZUSP leg.; MZSP 46477 • 1 ♀; Ubatuba, Parque Estadual da Serra do Mar, Núcleo Picinguaba; 3–14 Mar. 2008; F. Esteves and R. Feitosa leg.; MZSP 46478 • 1 ♂; Caraguatatuba, Reserva Florestal; 40 m a.s.l.; 2 Apr. 1962; Exp. Dep. Zool. leg.; MZSP 46479 • 1 ♂; same collection data as for preceding; 2 Apr. 1962; U.R. Martins, H. Reichardt and Silva leg.; MZSP 46480 • 1 ♀; same collection data as for preceding; CEMT CUIABA 00118358 • 1 ♂; São Sebastião; Dec.1955; A.P. Silva leg.; Ferraciolli leg.; MZSP 46482 • 2 ♂♂; Rio de Janeiro, Parque Nacional do Itatiaia; 700 m a.s.l.; 6 Apr. 1947; W. Zikán leg.; NHMB.
Description
Body length: 10.4–13.6 mm. Coloration (Fig. 3F): head pitch black, lustrous, except in lateral corners of clypeus, dark brown; mandibles dark brown, darker at base and tip; maxillary and labial palpi black; antennae entirely black. Pronotum (Figs 7I, 8I) lustrous, translucent, with broad irregular black band from anterior to posterior margin, wider anteriorly and near posterior margin, and narrower near anterior half; background pale yellow to light orange with barely defined orange and brown lateral patches. Scutellum and elytra pitch black, slightly lustrous; at mid-length of each elytron, large whitish to pale yellow round spot nearly reaching lateral borders but not meeting at suture. Thorax, legs and abdomen pitch black, tarsal claws brown.
Male (Fig. 3F)
Head short, nearly as long as wide, excluding eyes; integument smooth, densely covered with short and fine yellow setae; frons short, vertex flat, occipital region convex, broadly rounded behind eyes. Clypeus flat, anterior margin emarginate, slightly projected anteriorly with median incision. Eyes small, rounded, prominent. Mandibles falciform, acute, without accessory teeth. Last maxillary and labial palpomeres securiform. Antennae (Fig. 6I) slightly flattened dorsoventrally; antennomeres III–IX wider distally, subserrate; antennomeres IX–XI slightly narrower than preceding ones. Pronotum (Fig. 7I) variable, about 1.5 times as wide as long; usually, anterior margin slightly arched, almost straight in middle, anterior angles arched; lateral margins slightly sinuate, with deep notch at posterior third; sometimes lateral margins less sinuate and lateral notches shallow; integument smooth, densely covered with very fine yellow setae. Elytra long, each elytron 4.5 times as long as wide, almost parallel, wider at middle; integument coriaceous, densely covered with short and fine decumbent setae, and much longer thick erect setae. Legs slender, densely pubescent, covered with long and thick setae; tarsi flattened dorsoventrally, fourth tarsomere with transversal slit at base; anterior prothoracic tarsal claws (Fig. 9I) broadly lobed basally, lobe with truncate margin; posterior claws on meso- and metathoracic tarsal claws apparently split at apex, with fine protruding tooth slightly shorter than claws. Abdomen weakly sclerotised, coriaceous, densely covered with long setae; ventrite VI deeply notched at posterior margin, V-shaped, lateral apices arched; ventrite VII (Fig. 10I) with broad lobes, internal and apical margins forming acute tip strongly projecting ventrally. Aedeagus (Fig. 13A–C) triangular, ventral wall of tegmen parallel at base and strongly narrowing apically, apex acute; fringe of long setae along lateral margins of tegmen dorsally; parameres robust, very long, sinuous, apices acute, convergent; median lobe short, membranous, partially retracted behind parameres; central sclerite very long and slender, curved dorsally.
Female
Similar to male; antennomeres (Fig. 6T) broader; pronotum (Fig. 8I) trapezoidal, wider, 1.6 times as wide as long, lateral margins sinuate, without notches; tarsal claws without basal lobe or apical slit; ventrite VI not notched, distal margin slightly arched, concave; ventrite VII (Fig. 15I) broad, lateral and distal margins broadly arched, distal margin with two apical rounded lobes projecting posteriorly at middle.
Distribution
Brazil (São Paulo and Rio de Janeiro states) (Fig. 16).
description: Published as part of Biffi, Gabriel & Geiser, Michael, 2022, A revision of Discodon tricolor (Guérin-Méneville) and its mimics from the Atlantic forests of Brazil (Coleoptera: Cantharidae), pp. 148-189 in European Journal of Taxonomy 834 (1) on pages 170-172, DOI: 10.5852/ejt.2022.834.1907, http://zenodo.org/record/7017677