Alisotrichia bernali Harris and Armitage, 2019

Harris, Steven C. & Armitage, Brian J., 2019, The Trichoptera of Panama X. The Quebrada Rambala drainage, with description of 19 new species of microcaddisflies (Trichoptera: Hydroptilidae), Insecta Mundi 707 (707), pp. 1-54 : 8

Alisotrichia bernali Harris and Armitage , new species

Fig. 5

Diagnosis. Alisotrichia bernali appears to be most similar to A. lobata Flint and A. circinata Flint , both of which have abdominal segment VIII narrowing distally to an acute point and a tubular, thin phallus. The new species differs in that the acute apex of segment VIII is bifid and the phallus apex is widened. In A. mathisi Harris and Flint there are a pair of spines at the apex of segment VIII which resemble the structure of segment VIII in the new species, but the dorsal view of A. mathisi shows clearly that these are spines and not a bifid apical portion of the segment.

Male. Length 1.7 mm. Antenna 18 segments, scape slightly enlarged, remaining segments spatulate. Abdominal segment VI annular, with bifid, ventromesal process posteriorly. Segment VII thin ventrally, widening dorsally; emarginate posteriorly in dorsal view. Segment VIII elongate and narrowing distally to bifid apex, ventrally thin, narrowing anteriorly: dorsally and ventrally truncate, deeply incised posteriorly forming lateral bifid processes, mesally with pair of rounded humps; ventrally elongate with mesal humps posteriorly and bifid laterally. Segment IX entirely enclosed within VIII, anteriorly sharply narrowed into elongate, thin apodeme which extends into segment V, posteriorly divided into dorsal process bearing elongate, thickened seta, and a ventral process which is narrow and projects ventrad to an acute apex; ventrally with narrow anterior apodemes, posteriorly squarish, with sclerotized, slightly produced lateral margins, and truncate distally; dorsally narrow laterally with posterior inner lobes bearing elongate thickened seta, mesally with pair of thin sclerites. Segment X shelf-like in lateral view, rounded distally; in dorsal view generally rectanguloid, tapering to truncate apex. Phallus thin and tubular, widening basally, distally abruptly widening to oval, spatulate apex.

Female. Unknown.

Type material. Holotype, male— Panama, Bocas del Toro Province, Quebrada Rambala, near Rambala Jungle Lodge , 3.74 km SSE Rambala, 8.91543°N and 82.15527°W, 120 m, Malaise trap, February 6–12, 2017, E. Carlson.

Etymology. With respect and sadness, we name this species after Dr. Juan Bernal Vega of the University of Chiriqui (UNACHI) who passed away very recently while on a field trip. He will be deeply missed.

Figures

Figure 5. Alisotrichia bernali, sp. n., Male genitalia. A) Lateral view. B) Ventral view. C) Dorsal view. D) Phallus, dorsal view.