Chimarra fotobohitra, 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 : 12-13

Chimarra fotobohitra sp. nov.

urn:lsid:zoobank.org:act:822F3327-0079-4707-A056-9A5BD6455852

Figs 6 , 17

Diagnosis

Chimarra fotobohitra sp. nov. differs from the other species of the group by the ventral branch of tergum X, which is short and forms with the dorsal branch an angle of about 20° ( Fig. 6A ). When it is measurable, this angle is greater than 40°, except in C. gattolliati sp. nov. and C. lehibemavo sp. nov., where it is around 35° ( Fig. 7A , 2A ). Another remarkable character of this species is the strong median narrowing of the dorsal lamina ( Fig. 6D ), also observed in C. gensonae sp. nov., but with a different shape ( Fig. 8E ).

Etymology

The name is that of the river where the holotype was collected.

Type material

Holotype

MADAGASCAR: ♂, wings and genitalia mounted on 4 slides, remaining parts in alcohol, Fotobohitra River , 11 km from Kianjavato 21°22′39″ S, 47°52′00″ E, 50 m, 25 May 1995.

Description

SIZE. Forewing 5.5 mm, hind wing 4.4 mm.

TERGUM X. When viewed laterally, lateral lobe forked after mid-length, ventral branch short, dorsal branch barely longer.

INFERIOR APPENDAGES. L-shaped, dorsal branch twice as long as ventral branch, internal lobe rounded and hump-shaped ( Fig. 6C ).

PHALLIC APPARATUS. Ventral lamina as long as dorsal lamina, but thinner on the lateral and dorsal views; dorsal lamina with a median narrowing ( Fig. 6D ); internal sclerite long, nearly as long as ventral lamina, with a little, lateral expansion; phallotremal sclerite with a basal globular part and a distal pair of hooks.

Distribution

Madagascar (endemic), Mananjary River basin.

Figures

Fig. 6. Chimarra fotobohitra sp. nov. A–B. Abdominal segments IX and X. A. Lateral view. 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.

Fig. 7. Chimarra gattolliati sp. nov. A–B. Abdominal segments IX and X. A. Lateral view. 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. 2. Chimarra lehibemavo sp. nov. A–B. Abdominal segments IX and X. A. Lateral view. B. Dorsal view (partim). C. Inferior appendage, dorsal view. D–E. Phallic apparatus. D. Dorsal view. E. Lateral view. 1 = Lateral lobe of tergum X, dorsal branch. 2 = Lateral lobe of tergum X, ventral branch. 3 = Inferior appendage, dorsal branch. 4 = Inferior appendage, ventral branch. 5 = Inferior appendage, internal lobe. 6 = Phallotheca, ventral lamina. 7 = Phallotheca, dorsal lamina. 8 = Phallotheca, internal sclerite. 9 = Phallotheca, phallotremal sclerite. Scale bar = 0.5 mm.

Fig. 8. Chimarra gensonae sp. nov. A–B. Abdominal segments IX and X. A. Lateral view. B. Dorsal view. C. Inferior appendages, dorsal view. D–E. Phallic apparatus. D. Dorsal view. E. Lateral view. Scale bar = 0.5 mm.