Discodon aurimaculatum, Biffi & Geiser, 2022

Biffi, Gabriel & Geiser, Michael, 2022, A revision of Discodon tricolor (Guérin-Méneville) and its mimics from the Atlantic forests of Brazil (Coleoptera: Cantharidae), European Journal of Taxonomy 834 (1), pp. 148-189 : 163-165

publication ID	https://doi.org/ 10.5852/ejt.2022.834.1907
publication LSID	lsid:zoobank.org:pub:C2DF7AC2-3D99-43FF-BB36-CEF8E8747160
DOI	https://doi.org/10.5281/zenodo.7020060
persistent identifier	https://treatment.plazi.org/id/0D454F22-6E27-402C-ADDB-36D5483D57FB
taxon LSID	lsid:zoobank.org:act:0D454F22-6E27-402C-ADDB-36D5483D57FB
treatment provided by	Felipe
scientific name	Discodon aurimaculatum
status	sp. nov.

Treatment

Discodon aurimaculatum sp. nov.

urn:lsid:zoobank.org:act:0D454F22-6E27-402C-ADDB-36D5483D57FB

Figs 3D View Fig , 6F, Q View Fig , 7F View Fig , 8F View Fig , 9F View Fig , 10F View Fig , 12D–F View Fig , 15F View Fig

Diagnosis

Differs from all the other species by the elytra with the weakly defined longitudinal roughness and dark yellow spots ( Fig. 3D View Fig ), the shape of the aedeagus ( Fig. 12D–F View Fig ) and the last ventrite (VII) of the females ( Fig. 15F View Fig ).

Etymology

The specific epithet aurimaculatum refers to the dark yellowish to golden rounded elytral spots.

Type material

Holotype BRAZIL • ♂; Pindamonhangaba , Eugênio Lefèvre; 1200 m a.s.l.; 21 Dec. 1962; Exp. Dep. Zool. leg.; MZSP 46447 View Materials ( Fig. 3D View Fig ).

Paratypes (12 specimens) BRAZIL • 2 ♀♀; Rio de Janeiro, Itatiaia ; 1100 m a.s.l.; Feb. 1963; MZSP 46448 View Materials , 46449 View Materials • 2 ♀♀; same collection data as for preceding; Jan. 1968; MZSP 46450 View Materials , 46451 View Materials • 1 ♂; same collection data as for preceding; 1300 m a.s.l.; Nov. 1950; NHMB • 1 ♀; same collection data as for preceding, Véu da Noiva, córrego Maromba ; 22º26′10″ S, 44º37′28″ W; 1100 m a.s.l.; 2–3 Feb. 1997; Kury, Rocha and Mestre leg.; MZSP 46452 View Materials GoogleMaps • 1 ♂, 2 ♀♀; same collection data as for holotype; MZSP 46453 View Materials , 46454 View Materials , 46457 View Materials • 1 ♀; same collection data as for holotype; DZUP 320983 View Materials • 1 ♀; same collection data as for holotype; CEMT CUIABA 00118356 • 1 ♀; same collection data as for holotype; 24 Jan. 1963; MZSP 45593 View Materials .

Description

Body length: 11.7–13.0 mm. Coloration ( Fig. 3D View Fig ): head pitch black, lustrous, except in lateral corners of clypeus, light brown; mandibles light brown, darker at tip; maxillary and labial palpi black, light brown at apex of last palpomeres; antennae entirely black. Pronotum ( Figs 7F View Fig , 8F View Fig ) lustrous, partly translucent, with broad irregular black band from anterior to posterior margin, wider anteriorly and near posterior margin, and narrower near anterior half; no lateral dark bands or patches; background pale yellow to light orange with barely defined orange regions. Scutellum and elytra pitch black; at mid-length of each elytron, pale-yellow round spot meeting lateral borders but not meeting at suture. Thorax, legs and abdomen dark brown to black, tarsal claws brown.

Male ( Fig. 3D View Fig )

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 shallow median incision. Eyes small, rounded, prominent. Mandibles falciform, acute, without accessory teeth. Last maxillary and labial palpomeres securiform.Antennae ( Fig. 6F View Fig ) long, slightly flattened dorsoventrally; antennomeres slightly narrowing anteriorly, sub-serrate; antennomeres without longitudinal lines dorsally. Pronotum ( Fig. 7F View Fig ) wide, about 1.4 times as wide as long; anterior margin slightly arched, anterior angles arched; lateral margins slightly sinuate, with deep notch at posterior third; integument smooth, densely covered with very fine yellow setae. Elytra long, each elytron 4.8 times as long as wide, almost parallel; weakly defined longitudinal roughness, like costae, more visible anteriorly; 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. 9F View Fig ) broadly lobed basally, lobe with rounded 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 slightly notched at posterior margin; ventrite VII ( Fig. 10F View Fig ) with broad lobes, internal margins arched externally, apical margin broadly rounded. Aedeagus ( Fig. 12D–F View Fig ): ventral wall of tegmen elongate, apical margins convergent, forming a pair of parallel lateral projections with rounded apices and a short central projection, strongly curved ventrally and with acute hook-like apex; fringe of long setae along lateral margins of tegmen dorsally; parameres very short, hidden between tegmen and median lobe; median lobe long, membranous, with a pair of strong sclerites, each with double acute apices; sides of median lobe with tuft of thick spine-like setae.

Female Similar to male; antennae ( Fig. 6Q View Fig ) shorter; pronotum ( Fig. 8F View Fig ) wider, 1.6 times as wide as long, lateral margins without notches; tarsal claws without basal lobe or apical slit; ventrite VI not notched, distal margin slightly arched, concave; ventrite VII ( Fig. 15F View Fig ) broad, lateral and distal margins broadly arched, distal margin with two short acute apical lobes projecting posteriorly at middle and V-shaped medial notch.

Distribution

Brazil (Rio de Janeiro and São Paulo states) ( Fig. 16 View Fig ).