Chimarra gensonae Ird & Inra 2017, sp. nov.

Chimarra gensonae sp. nov.

urn:lsid:zoobank.org:act: D0D40DA2-B53D-4699-812D-A4BA6B5C80EF

Figs 8, 18

Diagnosis

Chimarra gensonae sp. nov. is closely related to C. tamara sp. nov. When viewed laterally, their tergum X are very similar, characterized by a thick and short dorsal branch and a thin ventral branch (Figs 8A, 14A). The two species differ by the phallotheca, short and stout in C. gensonae sp. nov. (Fig. 8 D–E), long and slim in C. tamara sp. nov. (Fig. 14 D–E).

Etymology

It is a pleasure to dedicate this species to my colleague Gwenaelle Genson in recognition of her efforts for the barcoding of caddisflies.

Type material

Holotype

MADAGASCAR: ♂, mounted on 2 slides, remaining parts in alcohol, Tamara River, 4 km from Ranomafana, 21°14′45″, 47°25′37″ E, 850 m, 24 May 1995.

Paratypes

MADAGASCAR: 3 ♂♂, same data as holotype, in alcohol; 1 ♂, Ambatoharanana River near Ranomafana, 21°15′15″ S, 47°27′34″ E, 850 m, 23 May 1995.

Other specimens

MADAGASCAR: 1 ♂, mounted on 3 slides, remaining parts in alcohol, Ranomafana National Park, tributary of the Namorona, 21°15′50″ S, 47°25′15″ E, 1230 m, 7 Nov. 1996.

Description

SIZE. Forewing 7.6 mm, hind wing 6.0 mm.

TERGUM X. Dorsal branch wide and short, thumb-shaped when viewed laterally, toward the apex a small protuberance with two sensillae; ventral branch thin as long as dorsal branch; dorsal and ventral branches forming an angle of 65°.

INFERIOR APPENDAGES. Roughly triangular, anterior margin almost twice as long as ventral margin; dorsal part curved distad, inner lobe long, thin, slightly protruding.

PHALLIC APPARATUS. Short compared to other species of the group. Phallotheca split nearly from the base; ventral lamina as long as dorsal lamina, thinner and digitiform; when viewed dorsally, dorsal lamina with a lateral fold and a sudden narrowing after mid-length (Fig. 8D); internal sclerite short, stout,

bullet-shaped (Fig. 8E); phallotremal sclerite including an ovoid basal part, a thin spine and a pair of hooks.

Distribution

Madagascar (endemic), Ranomafana National Park and surroundings areas.