Discodon vanini 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 vanini

description: Discodon vanini sp. nov.
urn:lsid:zoobank.org:act: BF23FEEE-E09E-4813-B496-268277095C24
Figs 3B, 6C, N, 7C, 8C, 9C, 10C, 11G–I, 15C
Diagnosis
Similar to D. tricolor and D. neoteutonum sp. nov. It differs from these species by the last two or three antennomeres being orange to light brown (Fig. 3B); the ventral wall of the tegmen (Fig. 11G–I) less distinctly narrowed laterally, the central sclerite of the median lobe broader than in D. tricolor and narrower than in D. neoteutonum; the last ventrite (VII) of females with distal margin sinuate (Fig. 15C).
Etymology
The specific epithet is patronymic, named in honour of the late Professor Sergio A. Vanin (1948–2020) in appreciation of his enormous and enduring contribution in the study and teaching of zoology, especially Coleoptera systematics.
Type material
Holotype BRAZIL • ♂; Minas Gerais, Monte Verde; 28 Feb. 1964; J. Halik leg.; MZSP 46355 (Fig. 3B).
Paratypes (59 specimens) BRAZIL • 1 ♂, 1 ♀; same collection data as for holotype; MZSP 46356, 46357 • 1 ♂; same collection data as for preceding; 5 Dec. 1964; MZSP 46358 • 1 ♂; same collection data as for preceding; 10 Feb. 1965; MZSP 46359 • 1 ♀; same collection data as for preceding; DZUP 320981 • 2 ♂♂; same collection data as for preceding; 13–18 Jan. 1969; MZSP 46361, 46362 • 1 ♂; same collection data as for preceding; 16 Jan. 1969; MZSP 46363 • 1 ♀; same collection data as for preceding; UFMG-ICO-2200000 • 1 ♀; same collection data as for preceding; 22 Feb. 1969; MZSP 46365 • 1 ♂; same collection data as for preceding; Nov. 1969; MZSP 46366 • 1 ♂, 1 ♀; same collection data as for preceding; Jan.–Feb. 1970; MZSP 46367, 46368, • 1 ♀; same collection data as for preceding; CEMT CUIABA 00118355 • 1 ♂; same collection data as for preceding; 24 Feb. 1971; MZSP 46370 • 1 ♂; São Paulo, Campos do Jordão; Jan. 1954; J. Lane leg.; MZSP 46371 • 1 ♀; same collection data as for preceding; Mar.–Apr. 2018; S.P. Rosa leg.; MZSP 46397 • 1 ♂; same collection data as for preceding; 1610 m a.s.l.; 12 Feb. 1952; NHMB • 1 ♂, 1 ♀; same collection data as for preceding; 1600 m a.s.l.; Mar. 1945; Wygodzinsky leg.; NHMB • 3 ♀♀; same collection data as for preceding, Capivari; Jan. 1961; Dirings leg.; MZSP 46372 to 46374 • 1 ♀; same collection data as for preceding; 10–22 Feb. 1981; S.A. and A.N. Vanin leg.; MZSP 46375 • 1 ♂; São Paulo, Cantareira [São Paulo]; 23 Mar. 1907; E. Garbe leg. [7772]; MZSP 46376 • 3 ♂♂, 2 ♀♀; same collection data as for preceding; Feb. 1962; J. Halik leg.; MZSP 46377 to 46381 • 1 ♀; same collection data as for preceding; 1 Mar. 1963; MZSP 46382 • 1 ♀; same collection data as for preceding; 6 Mar. 1968; MZSP 46383 • 1 ♂, 1 ♀; São Paulo, Ipiranga; 4 Mar. 1962; L. Stowbunenko leg.; MZSP 46384, 46385 • 1 ♂; São Paulo, Mata do Governo [Parque Estadual das Fontes do Ipiranga]; 3 Apr. 1931; R. Spitz leg.; MZSP 46386 • 1 ♂; Jundiaí, Reserva Biológica Serra do Japi; 23º14′20″ S, 46º57′27″ W; 23–25 Jan. 2012; E.A. Nascimento, G. Biffi and F.R. Fernandes leg.; MZSP 46387 • 1 ♀; Salesópolis, Estação Biológica de Boracéia; Apr. 1948; E.X. Rabello leg.; MZSP 46388 • 1 ♂; same collection data as for preceding; 21–22 Mar. 1973; S. Vanin and M. Jorge leg.; MZSP 46389 • 4 ♂♂, 1 ♀; São Paulo, Alto da Serra [Paranapiacaba, Santo André]; 28 Feb. 1912; G.E. Bryant and G. Bryant leg. 1919-147; NHMUK • 4 ♂♂, 2 ♀♀; same collection data as for preceding; 5 Mar. 1912; NHMUK • 1 ♂, 1 ♀; same collection data as for preceding; 7 Mar. 1912; NHMUK • 1 ♂, 1 ♀; same collection data as for preceding; 9 Mar. 1912; NHMUK • 1 ♂, 1 ♀; Paranapiacaba; Feb. 1962; L. Stowbunenko leg.; MZSP 46390, 46391 • 2 ♂♂, 2 ♀♀; same collection data as for preceding; 5 Mar. 1962; MZSP 46392 to 46395 • 1 ♂; Paraná, Ponta Grossa, Distrito de Itaicoca; 23º07′03.7″ S, 49º56′27.8″ W; 24 Mar.–12 Apr. 2017; M.D. Almeida L. Tozetto and M.H. Santos leg.; MZSP 46396.
Description
Body length: 9.7–13.0 mm. 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 black, last two or three antennomeres orange to light brown. Pronotum lustrous, translucent, with broad irregular black band from anterior to posterior margin, wider posteriorly and narrower near middle; background bright yellow to light orange with well-defined diagonal orange and brown patches laterally. 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. 3B)
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 a median incision. Eyes small, rounded, prominent. Mandibles falciform, acute, without accessory teeth. Last maxillary and labial palpomeres securiform. Antennae (Fig. 6C) slightly flattened dorsoventrally; antennomeres III– VIII wider distally; antennomeres IX–XI narrower and less expanded distally than preceding ones. Pronotum (Fig. 7C) about 1.5 times as wide as long; anterior margin almost straight, anterior angles arched; lateral margins with shallow notch at posterior third, pronotum wider behind notch; integument smooth, densely covered with very fine yellow setae. Elytra long, each elytron 4.2 times as long as wide, 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 a transversal slit at base; anterior prothoracic tarsal claws (Fig. 9C) broadly lobed basally, lobe with sinuous margin; posterior claws on meso- and metathoracic tarsal claws apparently split at the apex, with fine protruding tooth 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. 10C) elongate, oblong, strongly concave, internal margins arcuate, directed ventrally, distal margins projecting posteriorly, apices rounded. Aedeagus (Fig. 11G–I): ventral wall of tegmen short and broad, lateral margins slightly convergent, distal margin forming a pair of broadly rounded lobes; between lobes, small acute tip directed ventrally; fringe of long setae along lateral margins of tegmen dorsally; parameres broadly separated, robust, long and broad, parallel, curved ventrally, apex rounded; median lobe short, membranous, partially retracted behind parameres; broad central sclerite curved ventrally, with apex narrowly rounded.
Female
Similar to male; antennae (Fig. 6N) shorter, antennomeres slightly broader; pronotum (Fig. 8C) trapezoidal, narrower, 1.4 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. 15C) broad, lateral margins broadly arched, distal margin sinuous, with broad and shallow medial lobe.
Distribution
Brazil (Minas Gerais, São Paulo and Paraná 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 156-159, DOI: 10.5852/ejt.2022.834.1907, http://zenodo.org/record/7017677