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

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Chimarra gattolliati

sp. nov.

Chimarra gattolliati sp. nov.

Figs 7 View Fig , 16 View Fig


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 View Fig ) than in C. jejyorum sp. nov. ( Fig. 9A View Fig ). 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 View Fig ); 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 View Fig ). The phallothecae of both species are split, in C. gattolliati sp. nov., this splitting occurs after mid-length ( Fig. 7D View Fig ), whereas, in C. jejyorum sp. nov., it occurs somewhat after the base ( Fig. 9D View Fig ).


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

Type material


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.



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.


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 View Fig ) and an apical curvature ( Fig. 7D View Fig ); 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.


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