The Chimarra lehibemavo species-group, new and endemic to Madagascar (Trichoptera, Philopotamidae) Author Gibon, François-Marie text European Journal of Taxonomy 2017 2017-05-18 319 1 31 journal article 22104 10.5852/ejt.2017.319 e352bb73-0c07-4e6d-af55-f369bdab1aab 2118-9773 3829226 256407D2-64CC-4B3C-8C24-FA7C8CBF50B2 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.