Chimarra loffae, Gibon, 2015

Gibon, François-Marie, 2015, The Chimarra minima group in West Africa and Madagascar (Trichoptera, Philopotamidae), Zoosystema 37 (2), pp. 333-350 : 344

Chimarra loffae n. sp.

( Fig. 6 A-E)

TYPE MATERIAL. — Holotype: Guinea, Loffa River , near Macenta, 8°30’2.62”N, 9°27’27.82”W, 524 m. a.s.l., 20.II.1987, J.-F. Agnèse, 1 ♂ (2 slides: phallic apparatus / abdominal segments VII-X, head and thorax in alcohol) ( MNHN).

Paratypes: Same data, 1 ♂ (1 slide), 1 ♂ (1 slide: abdomen, head and thorax in alcohol); Guinea, small tributary of the Saint-Paul River , 22 km North / North-West from Nzérékoré, 7°55’55.18”N, 8°56’32.80”W, 420 m. a.s.l., 30.I.1988, F.-M. Gibon, 1♂ (ethanol) ; Guinea, Makona River at Bofossou, 8°39’23.29”N, 9°40’39.55”W, 21.I.1987, F.-M. Gibon, 2 ♂ (ethanol), 1 ♂ (2 slides: abdomen / head and thorax) ( CBGP) .

ADDITIONAL MATERIAL. — Cameroon. Noun River (Sanaga River bassin), a few kilometres upstream from Bafia, 4°47’52”N, 11°16’20”E, 440 m. a.s.l., 21.XII.1989, F.-M. Gibon, 1 ♂ (1 slide), 1 ♂ (2 slides: abdomen / head and thorax), 1 ♂ (2 slides: abdomen / head and thorax), 1 ♂ (alcohol) ; Sanaga at Nachtigal Falls, 4°20’50.01”N, 11°38’13.26”E, 20.XII.1988. F.-M. Gibon, 1 ♂ (2 slides: wings and genitalia / head and thorax) ( CBGP) .

TYPE LOCALITY. — Guinea, Loffa River, near Macenta, 8°30’2.62”N, 9°27’27.82”W, 524 m. a.s.l.

DISTRIBUTION. — Guinea, Cameroon.

ETYMOLOGY. — Named after the Loffa river ( Guinea and Liberia).

DIAGNOSIS. — Chimarra loffae n. sp. belongs to the subgroup 1, with a latero-ventral lobe sheet or leaf-shaped. When viewed dorsally, the latero-dorsal lobe of the tergum X are hook-shaped, with strongly curved hooks. This character is shared with C. prodhoni , C. callasae and C. cereris . Chimarra prodhoni belongs to the subgroup 2 (lateroventral lobe rod-shaped). Chimarra callasae is distinguished by the absence of an endothecal spine, an unusually large phallotremal sclerite and a shorter latero-ventral lobe of tergum X. In C. cereris , the hooks are more massive and less curved.

DESCRIPTION

Size:forewing 4.0 mm, hindwing 3.2 mm. Preanal appendages short, setose, fin-shaped. Inferior appendages massive in lateral view, dorsal branch strong, with a line of stout setae; internal process protruding, small, ventrally inserted. Latero-dorsal lobes of tergum X short, hook-shaped, strongly curved lateroventrad. Latero-ventral lobes of tergum X lightly sclerotized, rounded, almost as long as the latero-dorsal lobes. Lateral rods of phallotheca, long, stout, strongly curved ventrad along the distal third of their length. Terminal endothecal spine short, curved dorsad, with a wide base. Phallotremal sclerite small, trident-shaped when dorsally viewed.

Figures

FIG. 6. — A-E, Chimarra loffae n. sp.: A, B, segments IX and X, lateral view (A), dorsal view (B); C, D, phallic apparatus,lateral view (C), dorsal view (D); E, inferior appendage, dorsal view. Scale bar: 0.1 mm.