Gyrocarisa scottae, Malm & Johanson, 2005

Malm, Tobias & Johanson, Kjell Arne, 2005, Descriptions of two new species of Gyrocarisa (Trichoptera: Petrothrincidae) from Madagascar, Zootaxa 1009 (1), pp. 15-20 : 16-17

Gyrocarisa scottae , new species

Fig. 1–5

G. scottae differs from other species of Gyrocarisa by having the phallus with 2 long, slen­ der, acuminate parameres adjacent to its apicodorsal margin. Gyrocarisa scottae differs from G. steineri , G. concava and Gyrocarisa weaveri by the long, wedge­shaped inferior appendages. It appears to be more closely related to G. acuta by the overall genitalic structure, although G. scottae has longer superior processes of segment X and smooth ventral margins on the inferior appendages.

Male: Head: Maxillary palps 5­segmented, each with 1st segment about 3 times longer than wide, 2nd about half as long as first, 3rd shortest, 4th and 5th 2 times longer than 1st. Forewing 4.1 mm; hind wing 2.8 mm.

Genitalia: Segment IX with anterior margin broadly triangular in lateral view ( Fig. 1 ), curved mesad in ventral view ( Fig. 3 ). Superior processes cylindrical, slightly longer than inferior process, directed posteriad; mesal margins parallel, lateral margins slightly convex in dorsal view ( Fig. 2 ); tapering distally; ventral margin undulate with long lateral and apical setae in lateral view ( Fig. 1 ). Segment X inferior process directed posteriorly, slightly tapering distad; with pair of minute, rounded processes at apex in dorsal view, each bearing a long seta. Inferior appendage with elongate base ( Fig. 1 ), wedge­shaped, directed posterodorsad, with 3 posteriorly oriented, vertically adjacent apical lobes, curving mesad in ventral view ( Fig. 3 ); ventral margin smooth in lateral view ( Fig. 1 ); mesal margin undulate in ventral view ( Fig. 3 ), basally with short, rounded posteromesad process. Phallic guide slender along its length, oriented posterodorsad at base, curving ventrad along its length to posteriorly angled apex in lateral view ( Fig. 1 ). Phallus tapering along its length and curved ventrad ( Fig. 4 ). Parameres with bases directed dorsad; apical 4/5 curved posteriad, adjacent to apicodorsal margin of phallus, slender and acuminate in lateral view ( Fig. 4 ).

Holotype male: MADAGASCAR: Fianarantsoa Province: Ranomafana , Malaise trap near river in tropical forest, 12–20.xii.1999, 1150 m, 21.2554 S, 47.4552 E, M.E. Irwin, E.I. Schlinger ( INHS, alcohol).

Etymology: This species is named after Dr. K.M.F. Scott, for her valuable contribution to the understanding of African Trichoptera diversity over several decades.

Figures

FIGURES 1–5. Gyrocarisa scottae, new species, holotype. 1—male genitalia, lateral; 2—male genitalia, dorsal; 3—male genitalia, ventral; 4—phallus, lateral; 5—phallus, ventral.