Banyallarga (Banyallarga) villosa (Navás)

Prather Table Of Contents, Aysha L., 2004, Revision of the Neotropical caddisfly genus Banyallarga (Trichoptera: Calamoceratidae), Zootaxa 435 (1), pp. 1-76 : 19-20

Banyallarga (Banyallarga) villosa (Navás)

Figs. 12 , 13

Anisocentropus villosa Navás 1934a:174 [Type locality: Ecuador, Loja; MNHNP; original description implies male, but type is female].

Banyallarga villosa — Flint 1983:77.

This species is known from just a handful of specimens, all badly rubbed, so the wing pattern is unknown. The association of the males is circumstantial, and based on a single series of males and females collected together. The male of Banyallarga villosa can be separated from B. vicaria and other species in the subgenus Banyallarga by the deep mesal notch of male tergum X ( Fig. 12B ).

Adult. Forewing length 9.4–11.7 mm (n=8).

Head chestnut brown, with dorsomesal crest of golden setae. Maxillary palps golden brown. Antenna chestnut brown. Dorsal pterothorax chestnut brown; ventrolateral thorax and legs golden brown, hind tibia of male without posterior fringe. Forewing chestnut and golden brown. Hind wings without basal structures.

Male. Tergum IX with faint anterior ridge, extending mesally to posterior margin ( Fig. 12B ); lateral ridge incomplete dorsally; dorsal pleural setae approximately 15, long; sternum IX with heavy anterior ridge and paired sublateral posterior ridges. Preanal appendage subequal to tergum X, sharply tapered apically, with long setae on apical half. Tergum X in dorsal view with deep posteromesal notch, apically tapered in lateral view ( Fig. 12A ). Inferior appendage simple, with long setae ventrally and laterally on coxopodite; harpago rounded apically, of uniform circumference, with short fine setae basally and peglike setae apically. Phallus with phallotremal sclerite horseshoe­shaped, ventral sclerite a short tube ( Fig. 12D, E ).

Female. Sternum VIII anterior marginal ridge darkly sclerotized; with fine setae on posterior margin. Tergum IX with anterior marginal ridge extending mesally 1/2 length of segment; sternum IX with anterior and posterior lobes striate; smoothly sclerotized anteromesally and posterolaterally. Tergum X semimembranous, with sclerotized bands sublaterally, appendage with short digitate posteromesal process ( Fig. 13B ); sternum X with fine setae lateral to anal opening. Vaginal apparatus anterior and posterior sclerites equal in length; anterior sclerite truncate anteriorly, posterolateral projections rounded; posterior sclerite triangular ( Fig. 13A ).

ECUADOR: Loja: 1909, Poujade — holotype female ( MNHNP) ; Loja, Staudinger — 2 males, 1 female ( ZMHU) ; 2750 m, 23–25.iii.1965, Peña G.— 3 males ( NMNH) ; Loja, San Lucas , 2500 m, 24.x.1977, Peña G. — 1 male ( NMNH) .

Distribution. Ecuador.

Figures

FIGURE 12. Banyallarga (Banyallarga) villosa. Male (UMSP000009924): A—lateral view; B— dorsal view; C—ventral view; D—phallus, lateral view; E—phallotremal sclerites, dorsal view.

FIGURE 13. Banyallarga (Banyallarga) villosa. Female (holotype): A—sterna IX, X and vaginal apparatus, ventral view; B—terga IX and X, dorsal view; C—sternum VIII, ventral view.