Austrotinodes absaberi, Leandro Lourenço Dumas & Wagner Rafael M. de Souza, 2017

Leandro Lourenço Dumas & Wagner Rafael M. de Souza, 2017, On Brazilian Austrotinodes Schmid, 1955 (Insecta, Trichoptera, Ecnomidae): new species, new distributional records and an updated checklist, European Journal of Taxonomy 297, pp. 1-40 : 4-6

Austrotinodes absaberi sp. nov.

urn:lsid:zoobank.org:act:231301EA-9ECA-4C46-AFAB-3FE6ED93DFC8

Figs 1 , 14

Diagnosis

Austrotinodes absaberi sp. nov. is most similar to A. gusmaoi sp. nov., A. donagrazielae sp. nov. and A. taquaralis , resembling these species in the elongate, upwards curved intermediate appendages with 3 apical spine-like setae. It differs in that the apical portion of the phallus has a long, slender posterolateral spine, absent in the other species. Furthermore, the intermediate appendage in A. absaberi sp. nov. and A. gusmaoi sp. nov. lacks a basoventral seta. Other differences distinguishing A. absaberi sp. nov. from related species are the shape of the phallic guide, which is smaller and strongly arched in the species described here, and the more elongate preanal appendages when compared with those of A. gusmaoi sp. nov. The differences among these species are relatively minor, and they are here placed informally in the taquaralis Group based on: (1) the elongate, upwards curved intermediate appendages with 3 apical spines; (2) phallus with lateral process elongate, bifid, bearing an elongate and more robust dorsal branch and a short and slender ventral branch.

Etymology

The species is dedicated to the Brazilian biogeographer, geologist and environmentalist Aziz Nacib Ab’Saber, who was born at São Luiz do Paraitinga in São Paulo state in 1924 and died in 2012. Aziz Ab’Saber was the first person to classify scientifically the Brazilian and South-America territory in morphoclimatic domains. He also contributed to the “Pleistocene Refuge Hypothesis”, an attempt to explain the distribution and diversification of Neotropical taxa as a result of their isolation in forest fragments during glacial periods.

Material examined

Holotype

BRAZIL: ♂, Minas Gerais, Itabirito, Vale dos Tropeiros, Cachoeira dos Cruzados , 20°12′16.6″ S, 43°38′10.5″ W, 1037 m, 9 Oct. 2010, L.L. Dumas leg. ( DZRJ).

Paratypes

BRAZIL: 2 ♂♂, same data as holotype ( DZRJ); 1 ♂, same locality, 10 Oct. 2010, L.L. Dumas leg. ( DZRJ) .

Description

ADULT. Length of forewing 4.75–5.15 mm (n = 4). In alcohol, general color golden brown, with yellowish brown sclerites; antennae stramineous, dorsum of head golden brown, with pale yellow and dark brown setae; thorax golden brown dorsally, light yellow ventrally; legs yellow, legs segments with brown setae; wings pale brown, forewing with fine pale brown setae dorsally.

WINGS. Forewing with R1 forked apically, forks II–V present; hind wing with forks II, III and V, discoidal cell absent.

MALE GENITALIA. Segment IX deeply divided, sternum elongate; in lateral view, narrow basally, enlarging apically, ventral margin slightly convex; in ventral view, about 2 times as long as wide, enlarging apically, apical margin strongly convex. Phallic guide darkly sclerotized, elevated over inferior appendages; in lateral view, strongly arched, base broad, apex subacute, reaching middle of inferior appendage. Inferior appendages fused mesally, attached apicomesally on sternum IX; in lateral view, short, subtriangular, apex rounded; in ventral view, lateral lobes elongate, directed laterad, posterior margin almost straight, gently crenulated. Tergum X divided into pair of semimembranous oval lobes, bearing slender dorsal setae; in lateral view, trapezoidal. Preanal appendages long, surface setose, margin slightly crenulated, almost parallel-sided, apex rounded. Intermediate appendages long, approximately ¾ length of preanal appendage; in lateral view, wide at base, tapering apically, curved dorsad, with 3 spines at apex (some paratypes with a spine-like seta at mid-length, absent in holotype). Phallus with sclerotized phallobase and membranous apicoventral region, with 1 very elongate, posterolateral spine-like seta; lateral process elongate, bifid; dorsal branch long, wide, with row of 2 subapical and 1 apical spines, the apical one longer and curved; ventral branch short, narrow, with 1 apical spine; without basomesal process.

Distribution

Brazil (MG).

Figures

Fig. 1. Austrotinodes absaberi sp. nov., male genitalia. A. Ventral view. B. Dorsal view. C. Left lateral view. D. Phallic apparatus, left lateral view. E. Phallic apparatus, dorsal view.

Fig. 14. Distribution map of the new species of Austrotinodes.