The Chimarra minima group in West Africa and Madagascar (Trichoptera, Philopotamidae) Gibon, François-Marie Zoosystema 2015 2015-06-30 37 2 333 350 Gibon, 2015 Gibon 2015 [334,508,215,242] Insecta Philopotamidae Chimarra Animalia Trichoptera 11 344 Arthropoda species loffae sp. nov.  ( Fig. 6A-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 kmNorth/ North-Westfrom 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 Riverat 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 Riverbassin), 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);  Sanagaat 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 ( Guineaand 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. callasaeand  C. cereris. Chimarra prodhonibelongs to the subgroup 2 (lateroventral lobe rod-shaped).  Chimarra callasaeis 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. 1987-02-20 MNHN J. - F. Agnese Guinea-Bissau 524 8.500728 Loffa River 1 -9.457727 Macenta 11 344 525 1 holotype 1988-01-30 F. - M. Gibon Guinea-Bissau Nzerekore 420 7.9319944 Saint-Paul River 1 -8.942445 North-West 11 344 421 1 paratype 1987-01-21 CBGP F. - M. Gibon Guinea-Bissau 8.656469 Makona River 1 -9.677653 Bofossou 11 344 3 3 paratype 1989-12-21 F. - M. Gibon Cameroon Bafia 440 4.7977777 Noun River 21 11.272222 Sanaga River 11 344 444 4 1988-12-20 CBGP F. - M. Gibon Cameroon 4.347225 Sanaga 1 11.637016 Nachtigal Falls 11 344 1 1