Banyallarga (Histricoverpa) mexicana, Prather Table Of Contents, 2004

Prather Table Of Contents, Aysha L., 2004, Revision of the Neotropical caddisfly genus Banyallarga (Trichoptera: Calamoceratidae), Zootaxa 435 (1), pp. 1-76 : 27-28

Banyallarga (Histricoverpa) mexicana , new species

Figs. 23–24

This species is known only from two specimens. It is unique within Histricoverpa due to the easily recognizable long, paired, apically bifurcate posterior projections of tergum X ( Fig. 23A, B).

Adult. Forewing length 13.0– 13.3 mm (n=2).

Head golden brown. Maxillary palps golden brown. Antenna golden brown, base of each flagellomere pale. Dorsal pterothorax golden brown; ventrolateral thorax and femora golden brown, metathoracic tibia of male with long posterior setal fringe. Forewing uniform golden brown.

Male. Sternum VII with pointed anteromesal process. Tergum IX with anterior marginal ridge extending mesally to posterior margin, covered dorsally by semisclerotized membrane bearing dense fine pilosity ( Fig. 23B); lateral ridge incomplete posteriorly; anterior marginal ridge of sternum extending slightly posteriorly. Preanal appendages long, broadening from base and constricting subapically, slightly flexible apically; apical 2/3 covered with long fine setae ( Fig. 23B). Segment X deeply cleft posteromesally, forming two long, apically bifurcate lateral projections; in lateral view, ventral margin concave and posterior projection long and narrow ( Fig. 23A). Inferior appendage simple, with long setae ventrally and laterally on coxopodite; harpago of uniform diameter along length, with fine setae basally and peglike setae apically ( Fig. 23A). Phallus with U­shaped phallotremal sclerite, thornlike setae on endothecal membrane (23D).

Female. Sternum VII with pointed anteromesal process. Sternum VIII anterior marginal ridge darkly sclerotized; fine setae covering posterior surface of sternite (24C). Tergum IX with anterior marginal ridge extending only slightly mesally, posteromesally indistinct from tergum X ( Fig. 24B); sternum IX with anterior and posterior lobes darkly sclerotized and striate; with tiny setae posteriorly ( Fig. 24A). Tergum X semimembranous, appendage truncate apically ( Fig. 24B); sternum X with semisclerotized plates bearing fine setae lateral to anal opening. Vaginal apparatus anterior sclerite rounded anteriorly, posterolateral projections short and rounded; posterior sclerite longer than anterior, constricted at anterior margin of sternum IX; dorsal connective membrane distinct ( Fig. 24A).

Holotype male: MEXICO: Oaxaca: La Esperanza , 18.iv.1983, Garcia & Ibarra ( UMSP000065234 ; IBUNAM).

Paratype: MEXICO: Oaxaca: La Esperanza , 18.iv.1983, Garcia & Ibarra — 1 female ( IBUNAM) .

Distribution. Mexico.

Etymology. Named for the country of Mexico, where this northernmost representative of the genus Banyallarga was collected.