Chimarra saha, Ird & Inra, 2017

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

Chimarra saha sp. nov.

urn:lsid:zoobank.org:act:8CED47DC-B04D-4163-9759-F1AE96D400B1

Figs 13 , 17

Diagnosis

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).

Etymology

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

Type material

Holotype

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

Description

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.

Distribution

Madagascar (endemic), Andringitra National Park.

Figures

Fig. 13. Chimarra saha sp. nov. A–B. Abdominal segments IX and X. A. Lateral view with ventral margin of sternite VIII. B. Dorsal view (partim). C. Inferior appendage, dorsal view. D–E. Phallic apparatus. D. Dorsal view. E. Lateral view. Scale bar = 0.5 mm.

Fig. 17. Chimarra fotobohitra sp. nov., Chimarra saha sp. nov., Chimarra hamatra sp. nov., Chimarra moramanga sp. nov. and Chimarra cebegepi sp. nov., schematic distribution map and ecological profile of the capture sites in Madagascar.