The Chimarra minima group in West Africa and Madagascar (Trichoptera, Philopotamidae) Author Gibon, François-Marie text Zoosystema 2015 2015-06-30 37 2 333 350 http://dx.doi.org/10.5252/z2015n2a3 journal article 10.5252/z2015n2a3 1638-9387 5155852 urn:lsid:zoobank.org:pub:CF42741C-5316-48DF-B2FF-F85540EFF5C0 Chimarra antsymeloka n. sp. ( Fig. 5 A-F) TYPE MATERIAL. — Holotype : Madagascar , Ambatandrano River (tributary of the Namorona) at Ambatandrano , 47°26’32”E , 21°14’45”S , 775 m . a.s.l., 17.IV.1994 , 1 ♂ (2 slides: Phallic apparatus / abdominal segments VII-X, head and thorax in alcohol) ( MNHN ). Paratypes : Same data, 4 ♂ (ethanol). – RN25 between Ranomafana and Ifanadiana on the Namorona, 47°31’46”E , 21°16’40”S , 580 m . a.s.l., 21.IV.1994 , 8 ♂ (ethanol) ( CBGP ). TYPE LOCALITY. — Madagascar , Ambatandrano River (tributary of the Namorona) at Ambatandrano, 47°26’32”E , 21°14’45”S , 775 m . a.s.l. A B C FIG. 2. — A -C , wings: A , Chimarra vulgaris n. sp. ; B , Chimarra antsymeloka n. sp. ; C , Chimarra assambae n. sp. Scale bar: 1 mm. Abbreviations: A , anal vein; Cu , cubitus; M , medius; R , radius; Sc , subcosta. FIG. 3. — A , B , Chimarra callasae Gibon,1982 : A , segments IX and X,lateral view; B , phallic apparatus,lateral view; C , D , Chimarra minima Ulmer, 1907 , holotype male: C , segments IX and X, lateral view; D , phallic apparatus, lateral view; E , Chimarra sassandrae Gibon, 1982 , segments IX and X, lateral view; F , Chimarra toubaensis Gibon, 1985 , segments IX and X, lateral view. Scale bar: 0.1 mm. DISTRIBUTION. — Madagascar . ETYMOLOGY. — Named after the Malagasy words antsy = knife and meloka = curved, in reference to the shape (sickle) of tergum X in dorsal view. DIAGNOSIS. — The two Malagasy species, C. antsymeloka n. sp. and C. vulgaris n. sp. , belong to subgroup 1, with a latero-ventral lobe sheet or leaf-shaped. Both have an endothecal spine, straight (not curved as in continental species. The two lateral rods of the phallotheca are smaller than in the other species; they are thick with a wrinkled appearance in C. antsymeloka n. sp. , thinner and spine-shaped in C. vulgaris n. sp. The apex of the latero-dorsal lobes of the tergum X are acute in C. antsymeloka n. sp. , truncate in C. vulgaris n. sp. FIG. 4. — Chimarra assambae n. sp. : A , segments IX and X, caudal view; B , segments IX and X, lateral view; C , segments IX and X, dorsal view; D , phallic apparatus, lateral view; E , inferior appendage, dorsal view. Abbreviations: ai , inferior appendage; db , dorsal branch; ib , inferior branch; pa , preanal appendage, sg , abdominal segment; t , tergite; vb , ventral branch. Scale bar: 0.1 mm. DESCRIPTION Size: forewing 4.5 mm , hindwing 3.7 mm . Preanal appendages small, setose, wineskin-shaped. Inferior appendages massive in lateral view, dorsal branch strong, short, triangular when viewed dorsally; internal process long and narrow, inserted just below the dorsal branch. Latero-dorsal lobe of tergum X strong, distal part curved, with pointed distal extremity; small pointed projection inserted at mid-length on the outer edge; sickle-shaped when viewed dorsally. Latero-ventral lobe of tergum X sheet like, long, somewhat triangular on lateral view. Lateral rods of Phallotheca short, strong, curved ventrad with a wrinkled appearance. Endothecal spine present small, straight. Phallotremal sclerite large; when dorsally viewed, trident-shaped with two symmetric latero-dorsal branches and one slightly shorter, centro-ventral branch.