Gyrocarisa weaveri, 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 : 18-19

Gyrocarisa weaveri , new species

Fig. 6–10

Gyrocarisa weaveri differs from G. acuta , G. concava and G. scottae by having male genitalia with inferior appendages rhomboid in lateral view, and segment X with short superior processes. It resembles G. steineri by the overall genitalic shape, but differs by having Ushaped inferior process of segment X and the inferior appendages with only 1 apical lobe at posterodorsal corner.

Male: Head: Maxillary palp 1st segment 3 times longer than wide, 2nd segment about half as long as segment 1, 3rd shortest, 4th about 3 times longer than 1st segment and 5th segment slightly longer than 4th. Forewing 4.3 mm; hind wing 3.0 mm.

Genitalia: Segment IX with anterior margin sharply pointed anterodorsad in lateral view ( Fig. 6 ), curved laterad in ventral view ( Fig. 8 ). Superior process short and circular in dorsal view, with long setae and erect bases along posterior and mesal margin, separated by U­shaped notch ( Fig. 7 ); directed posteroventrad, widening at blunt apex, ventral margin smooth in lateral view ( Fig. 6 ). Inferior process of segment X triangular, produced posteriad with rounded posterior margin in dorsal view ( Fig. 7 ), with pair of minute processes at apex bearing few long setae, directed posteroventrad in lateral view ( Fig. 6 ); with broad, triangular basoventral process and tapering towards setose apex. Inferior appendage short in ventral view ( Fig. 8 ); rhomboid, oriented posterodorsad, with slightly concave dorsal margin in lateral view ( Fig. 6 ). Posterodorsal corner of inferior appendage produced posteriad, with apex pointed and curved ventrad in lateral view ( Fig. 6 ), posterior margin slightly undulate due to erect setal bases along margin, produced medially and pointed posteroventrally; in ventral view posterior margin slightly concave and undulate ( Fig. 8 ). Phallus nearly straight, tapering distally in lateral view ( Fig. 9 ); ventroapically membranous. Pair of posteriorly directed phallic parameres originate medially, tapering distad in lateral view ( Fig. 9 ); apex curved laterad in ventral view ( Fig. 10 ).

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: The species is named after Dr. John S. Weaver III (New Hampshire Department of Agriculture, Concord, NH, USA), for his contribution to the knowledge on the Petrothrincidae .

Figures

FIGURES 6–10. Gyrocarisa weaveri, new species, holotype. 6— male genitalia, lateral; 7—male genitalia, dorsal; 8—male genitalia, ventral; 9—phallus, lateral; 10—phallus, ventral.