Neotrichia chihuahua Harris and Flint, 2016

Harris, Steven C. & Oliver S. Flint, Jr., 2016, New species of microcaddisflies (Trichoptera: Hydroptilidae) from the western United States, Canada, Mexico and Belize, Insecta Mundi 2016 (499), pp. 1-22 : 2

Neotrichia chihuahua Harris and Flint , new species

Fig. 2

Neotrichia chihuahua is a member of the canixa group of Keth et al. (2015) based on the apical horns of the tenth tergite and the bifid bracteoles, both characteristic of the group. The wide, parallel horns are similar to those of N. kitae Ross , but the structure of the bracteoles and the inferior appendages are more similar to that of N. maria Bueno-Soria and Hamilton. However , in ventral view, the inferior appendages of the new species are much different from those of N. maria and N. kitae .

Male. Length 2 mm. 18 antennal segments, body brown in alcohol. Abdominal segment VIII annular. Segment IX incomplete dorsolaterally, posteriorly truncate with setal-bearing lobe on dorsum, rounded anteriorly; in ventral view shallowly incised on posterior margin, deeply incised anteriorly. Tergite X posteriorly with deep truncate incision forming lateral horns; anteriorly fused with segment IX; in lateral view with dorsal hump giving rise to horn, which narrows to acute apex. Subgenital plate in lateral view narrowing distally to downturned apex, which bears an elongate seta; in ventral view narrow over length, sclerotized distal margin bearing pair of elongate setae. Bracteoles bifid, dorsal branch elongate, with long seta apically, ventral branch about half length of upper bearing elongate seta. Inferior appendages rectanguloid in lateral view with apex slightly upturned, ventral process about half length of appendage; in ventral view extending beyond subgenital plate, narrowing and sharply angled inward at apex, mesal processes short, slightly tapering from base and bearing apical seta. Phallus tubular, constricted at mid-length and bearing thin paramere encircling shaft, apex forked, ejaculatory duct protruding distally.

Type material. Holotype, male - Mexico, Chihuahua, Rio Concheno at Highway 16 near Basaseachic , 25 May 1991. S. Harris and A. Contreras ( NMNH).

Etymology. Named for the Mexican state of Chihuahua.

Figures

Figure 2. Neotrichia chihuahua, n. sp. Male genitalia. A. Lateral view; B. Ventral view; C. Dorsal view; D. Phallus, dorsal.