Chimarra gattolliati, 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 : 13-15

Chimarra gattolliati sp. nov.

urn:lsid:zoobank.org:act:EB25203C-33C7-4244-A74E-FBD14FB3D215

Figs 7 , 16

Diagnosis

Chimarra gattolliati sp. nov. is most closely related to C. jejyorum sp. nov. In both species, the lateral lobes of tergum X are short, the dorsal branches are small and thumb-shaped. The angle between dorsal and ventral branch is more acute in C. gattolliati sp. nov. ( Fig. 7A ) than in C. jejyorum sp. nov. ( Fig. 9A ). But this is not easy to observe, the two species are more quickly distinguished by the inferior appendages or by the phallic apparatus. In C. gattolliati sp. nov., the ventral branch of the inferior appendage is distally protruding, the dorsal branch is thin and arched ( Fig. 7A ); in C. jejyorum sp. nov., the ventral branch is not clearly apparent and the dorsal branch is wide and only curved towards the apex ( Fig. 9A ). The phallothecae of both species are split, in C. gattolliati sp. nov., this splitting occurs after mid-length ( Fig. 7D ), whereas, in C. jejyorum sp. nov., it occurs somewhat after the base ( Fig. 9D ).

Etymology

This species is dedicated to Jean-Luc Gattolliat in tribute to his work on the Malagasy may flies.

Type material

Holotype

MADAGASCAR: ♂, mounted on 4 slides, tributary of the Manampanihy River near Fenoevo, 24°41′00″ S, 46°53′39″ E, 72 m, 15 Apr. 1992, leg. J.-M. Elouard.

Paratype

MADAGASCAR: 1 ♂, mounted on 4 slides, remaining parts in alcohol, Andranohela River, camp II of the WWF expedition to the Andohahela National Park, 24°35′33″ S, 46°44′19″ E, 900 m, 28 Nov. 1995, leg. J.-M. Elouard.

Description

SIZE. Forewing 6.6 mm, hind wing 5.5 mm.

TERGUM X. Lateral lobe with wide basal part, short ventral branch and barely longer dorsal branch; when viewed dorsally, dorsal branch angled with, towards the apex, a small protuberance bearing the sensillae.

INFERIOR APPENDAGES. L-shaped (lateral view); ventral branch distally protruding; dorsal branch thin and regularly arched.

PHALLIC APPARATUS. Phallotheca split after mid-length; ventral lamina longer than dorsal lamina, dorsal lamina with a lateral fold ( Fig. 7E ) and an apical curvature ( Fig. 7D ); phallotremal sclerite with basal part flanked by two indistinct small needles and extended by a pair of hooks; internal sclerite long and stout, with apical curvature, slightly shorter than phallotremal sclerite.

Distribution

Madagascar (endemic), Andohahela National Park and surrounding areas.

Figures

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. 16. Chimarra lehibemavo sp. nov., Chimarra tamara sp. nov., Chimarra gattolliati sp. nov. and Chimarra forcellinii sp. nov., schematic distribution map and ecological profile of the capture sites in Madagascar.

Fig. 9. Chimarra jejyorum sp. nov. A–B. Abdominal segments IX and X. A. Lateral view with ventral margin of sternite VIII. B. Dorsal view. C. Inferior appendage, dorsal view. D–E. Phallic apparatus. D. Dorsal view. E. Lateral view. Scale bar = 0.5 mm.