Tinodes isalo, Melnitsky, Stanislav I. & Ivanov, Vladimir D., 2016

Melnitsky, Stanislav I. & Ivanov, Vladimir D., 2016, A new species of Tinodes (Trichoptera: Psychomyiidae) from Madagascar, Zootaxa 4136 (2), pp. 390-392 : 392

Tinodes isalo new species

( Figs 2 A–E)

Holotype: male. Length of each forewing 3.5 mm, body length 2.5 mm. Abdomen, wings and thorax light brown. Head and legs pale yellowish. Antennae, palpi, tibiae, and tarsi covered with long dark hairs. Abdominal sternite V with small lateral cuticular sclerites associated with ducts of sternal pheromone glands.

Male genitalia. Ventral part of annular segment IX wide in lower part and shorter dorsally, its posterior margin well sclerotized ( Fig. 2 A). Dorsal part of segment IX connected to ventral by narrow neck well developed, strongly dilated, its lateral surface somewhat convex in dorsal view ( Fig. 2 B), posteroventral margin slightly concave. Long preanal appendages curved slightly downwards ( Fig. 2 A) and straight in dorsal view ( Fig. 2 B), with numerous long hairs. Gonocoxite (basal segment) of each gonopod (inferior appendage) about as long as broad in lateral view; with sclerotized and almost straight posterior margin ( Fig. 2 A); gonostyle (apical segment) narrow, curved slightly dorsad and mesad, subequal to gonocoxite, with small sclerotized mesal tuberculi at base ( Figs. 2 A, 2C). Aedeagus ( Fig. 2 A, 2D, 2E) curved ventrad, with enlarged membranous apical part and long straight dorsolateral projections of phallobase ("paraproctal processes" of Johanson & Oláh 2007) provided with 3 pairs of strong lateral spines ( Figs. 2 D, 2E); ventral part of phallobase sclerotized with deep incision; strong transversal spine directed to left side visible inside apical part of aedeagus ( Fig. 2 D).

This species is similar to Tinodes irwini Johanson & Oláh 2007 from Madagascar (Finarantsoa Province, Ranomafana National Park, about 250 km NE from Isalo National Park) and differs from it in the shape and proportions of the inferior appendages in which the gonostyles are undivided in T. isalo (each bifid with a short dorsal and a long posteroventral branch in T. irwini ); in the almost straight preanal appendages of T. isalo (curved laterad basally in T. irwini ); and the structures of aedeagus having dorsolateral projections ("paraproctal sclerites") straight and longer than the phallobase with 3 lateral spines, whereas in T. isalo these projections are shorter curved lateral projections of the phallobase possessing 2 short and 2 very long spines. The aedeagus in the new species has a shorter transversal spine, but in T. irwini it has larger spines along the aedeagus.

The female sampled with this male might be conspecific with it. The female has a long and slightly curved abdominal segment IX; lack of adequate female descriptions in this genus makes impossible a comparison with other species.

Distribution. Madagascar: Ihorombe region.

Material. Holotype male, Madagascar, 5 km WNW Ranohira, Isalo National Park, small river, 22º32'21.06”S, 45º22'37.36”E, 802 m, 17.vii.2014; leg. V. Ivanov, S. Melnitsky.

Figures

FIGURE 2. Male genitalia of Tinodes isalo new species: 2 A, genitalia, left lateral; 2 B, dorsal; 2 C, ventral; 2 D, aedeagus apex, ventral; 2 E, aedeagus, lateral.