Chimarra saha,

Gibon, François-Marie, 2017, The Chimarra lehibemavo species-group, new and endemic to Madagascar (Trichoptera, Philopotamidae), European Journal of Taxonomy 319, pp. 1-31: 23-25

publication ID

publication LSID


persistent identifier

treatment provided by


scientific name

Chimarra saha

sp. nov.

Chimarra saha  sp. nov.

Figs 13View Fig, 17View Fig


By most of its characters, C. saha  sp. nov. is closely related to C. moramanga  sp. nov. The remarkable structure of the phallic apparatus of this latter prevents any confusion between the two species. Moreover, C. saha  sp. nov. is characterized by the laterally deflected dorsal lamina of the phallotheca. This deflection makes the distal part of the apparatus wider than the median part (dorsal view).


From the Malagasy ‘saha’ (= valley), referring to the name of the type-river, used as a noun in apposition.

Type material


MADAGASCAR: ♂, mounted on 2 slides, remaining parts in alcohol, Sahanivoraky River , 22°13′33″S, 47°00′41″ E, 810 m, 19 Nov. 1993.



SIZE. Forewing 7.5 mm, hind wing 5.9 mm.

TERGUM X. Dorsal branch of the lateral lobe long (twice as long as the ventral branch), bent ventrad at mid-length with a dorsad curved apex (lateral view).

INFERIOR APPENDAGE. Triangular with long anterior margin, short ventral margin and a small triangular point on distal edge, dorsal apex slightly curved distad, inner lobe large and rounded (dorsal view).

PHALLIC APPARATUS. Phallotheca split at mid-length; dorsal lamina wide, digitiform and laterally deflected; ventral lamina shorter and less sclerotized than dorsal lamina; internal sclerite long; phallotremal sclerite short, with stout pair of hooks.


Madagascar (endemic), Andringitra National Park.