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

publication ID 10.5252/z2015n2a3

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Chimarra loffae

n. sp.

Chimarra loffae   n. sp.

( Fig. 6 View FIG 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). GoogleMaps  

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) GoogleMaps   ; 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) GoogleMaps   .

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) GoogleMaps   ; 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) GoogleMaps   .

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.


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.


Museum National d'Histoire Naturelle