Pisulia stoltzei, Johanson, Kjell Arne & Mary, Nathalie, 2009

Johanson, Kjell Arne & Mary, Nathalie, 2009, Description of three new caddisfly species from Mayotte Island, Comoros Archipelago (Insecta: Trichoptera), Zootaxa 2089, pp. 1-9 : 3-4

Pisulia stoltzei , new species

Figs. 2–4

Diagnosis. Pisulia stoltzei , new species, is distinguished from all other Pisulia species in that segment IX is anteriorly rounded and ellipsoid and the dorsal lobe is rectangular in lateral view; the superior appendage lobes are large, with apices directed ventrad; and the median lobes of segment X are broad and slightly narrowed, with apices directed ventrad. The species resembles P. p i n h e y i Kimmins, 1957, from Zimbabwe, from which it is easily distinguished in lateral view by segment IX being more strongly produced anterad and by the shorter superior appendages; and in ventral view by the apex of the internal lobe of the dorsal branch of the inferior appendages being produced mesad.

Description. Male genitalia: Segment IX ellipsoid anteriorly in lateral view ( Fig. 2 ); dorsal margin slightly concave, ending in rectangular dorsal lobe ( Fig. 2 ); strongly narrowing ventrad ( Fig. 2 ); dorsal bridge ( Fig. 3 ) narrow, parallel-sided. Median lobes of segment X nearly black, originating from segment IX immediately below dorsal bridge ( Fig. 2 ); fused with superior appendages along basal half; carrying 2 long setae on elevated setal bases near base in each side ( Figs. 2, 3 ). Superior appendages nearly black, tall in lateral view ( Fig. 2 ), apices cornute, each with short, smooth, digitate dorsal process curving ventrolaterad ( Figs. 2, 3 ); bases wide, with short, stout setae along posterior margins. Inferior appendages with pair of long, digitate ventral branches, straight in lateral and ventral views and with long apical setae and minute ventral setae near bases. Each inferior appendage with external lobe of dorsal branch irregularly rectangular, broad, with apex pointing slightly dorsad, its posterior margin bearing 2 long, stout setae ( Fig. 2 ); in ventral view ( Fig. 4 ) nearly Y-shaped, with large marginal tubercles. Each inferior appendage with internal lobe of dorsal branch oriented posterodorsad ( Fig. 2 ), narrowing along its length before rounded, dorsad-curved apex; in ventral view ( Fig. 4 ) wide, with apex pointing mesad. Triangular, compressed, plate-like process located above external lobe of dorsal branch of each inferior appendage, with band of setae along convex dorsal margin; apex pointing ventrad ( Fig. 2 ). Phallus unknown.

Holotype (pharate male): MAYOTTE: Koualé river, affluent forêt 1 (DAF-19), 12°47’57.84’’S, 45°09’51.77’’E, 201 m, 18.v.2006. Abdomen mounted in Euparal on microscope slide, rest of body in alcohol ( MNHN).

Paratype (1 pupa): Same data as holotype — 1 pupa (in alcohol, NRM).

Distribution. Comoros Archipelago.

Etymology. Stoltzei , named after Dr. Michael Stoltze, in honor of his contribution to understanding the systematics of Pisuliidae .

Remark: The inferior appendages were impossible to separate from segment IX, which might be due to

Figures

FIGURES 2 – 4. Pisulia stoltzei, new species. Pharate male holotype: 2 — genitalia, left lateral; 3 — genitalia, dorsal; 4 — genitalia, ventral. The “ ventral branch, ” “ external lobe of dorsal branch, ” and “ internal lobe of dorsal branch ” are all parts of the inferior appendages.