Chimarra sanagae, 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 sanagae n. sp.

( Fig. 7 A-D)

TYPE MATERIAL. — Holotype: Cameroon, Sanaga River at Sakbayémé, 4°2’3”N, 10°32’44”E, 9.III.1989, F.-M. Gibon, 1 ♂ (2 slides: wings and phallic apparatus / head, thorax and abdomen) ( MNHN).

Paratypes: Small tributary of the Sanaga River between Sakbayémé and Song-Loulou, 4°4’42”N, 10°25’20”E, 10.III.1989, F.-M. Gibon, 1 ♂ (3 slides: phallic apparatus / abdomen / head and thorax) ( CBGP). - Sanaga at Song-Loulou, 4° 5’20.45”N, 10°27’19.89”E, 6.XII.1989, F.-M. Gibon, 1 ♂ (ethanol) ( CBGP).

TYPE LOCALITY. — Cameroon, Sanaga River at Sakbayémé, 4°2’3”N, 10°32’44”E.

ADDITIONAL MATERIAL. — Cameroon, Ngoué River near Pouma (Nyong River bassin), 3°61’7.60”N, 10°31’26.35”E, 17.XII.1989, F.-M. Gibon, 8 ♂ (ethanol) ( CBGP).

DISTRIBUTION. — Cameroon.

ETYMOLOGY. — Named after the Sanaga River (central Cameroon).

DIAGNOSIS. — Chimarra loffae n. sp. belongs to the subgroup 1, with a latero-ventral lobe sheet or leaf-shaped. It is distinguished from C. prodhoni , the other species of the subgroup, by the wide base of the latero-ventral lobe of tergum X and by the absence of an endothecal spine.

DESCRIPTION.

Size: forewing 3.9 mm, hindwing 3.2 mm. Preanal appendages small, setose with wrinkled aspect. Inferior appendages massive, dorsal branch strong, elongate, with a line of stout setae; internal process protruding, ventrally inserted, small but larger than in C. loffae n. sp. Latero-dorsal lobes of tergum X stout, hook-shaped, curved outward, shorter than latero-ventral lobe. Latero-ventral lobes of tergum X: base wide, almost triangular in lateral view, apically extending as a sclerotized, slightly ventrad curved, finger-shaped rod. Lateral rods of phallotheca, long, stout, strongly curved ventrad, distal third with a wrinkled appearance. Endothecal spine absent. Phallotremal sclerite small, with indiscernible structure.

Figures

FIG. 7. — A-D, Chimarra sanagae n. sp.: A, B, segments IX and X, lateral view (A), dorsal view (B); C, inferior appendage, dorsal view; D, phallic apparatus, lateral view. Scale bar: 0.1 mm.