Neotrichia contrerasi 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 : 3

Neotrichia contrerasi Harris and Flint , new species

Fig. 3

Neotrichia contrerasi is another member of the canixa group of Keth et al. (2015) with some similarity to N. tauricornus Malicky in the structure of the subgenital plate and the inferior appendages. It differs from N. tauricornis and other members of the canixa group in the combination of small, widely spaced horns of the tenth tergite, the evenly divided branches of the bracteoles, and the elongate ventral process of the subgenital plate.

Male. Length 2.0 – 2.2 mm. 18 antennal segments, body brown in alcohol. Abdominal segment VIII annular. Segment IX incomplete dorsolaterally, posteriorly truncate with setal-bearing lobe on dorsum, anteriorly rounded; in ventral view deeply incised on posterior and anterior margins; dorsally fused with segment X. Tergite X wide, with broad incision posteriorly creating small lateral horns; in lateral view elongate, narrowing posteriorly to acute apex. Subgenital plate in lateral view narrowing distally to elongate process, which extends ventrad to tip of inferior appendages; in ventral view narrow over length, T-shaped apically with pair of elongate mesal setae. Bracteoles bifid, dorsal branch slightly longer than the ventral branch, each with long seta apically. Inferior appendages wide basally, tapering distally, ventral process about half length of appendage; in ventral view nearly extending to tip of subgenital plate, wide basally, tapering distally and curved mesad, mesal processes short and stout bearing apical seta. Phallus tubular, constricted at mid-length and bearing thin paramere encircling shaft, apex divided into pair of elongate processes, which are at an angle to the shaft, ejaculatory duct protruding distally.

Type material. Holotype, male - Mexico, Nuevo Leon, Municipio de Santiago, Rio Ramos at Los Adjuntas , 4.5 km southeast Puerto Genovevo , N25 o 18’, W100 o 08’, 12 May 1989, S. Harris and A. Contrera s ( NMNH) . Paratypes - same as holotype, 4 males ( INHS, NMNH), United States, Arizona, Coconino County, West Fork Oak Creek, A79-17, 9 August 1979, M. Sanderson, 1 male ( INHS).

Etymology. Named for Atilano Contreras-Ramos who collected the species with the senior author and has contributed much to our knowledge of the aquatic insects of Mexico.

Figures

Figure 3. Neotrichia contrerasi, n. sp. Male genitalia. A. Lateral view; B. Ventral view; C. Dorsal view; D. Phallus, ventral.