Neotrichia palitla 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 : 4

Neotrichia palitla Harris and Flint , new species

Fig. 5

A member of the canixa group, Neotrichia palitla is similar to N. jarochita Bueno-Soria based on the asymmetrical horns of the tenth tergite. It differs from this species in that the left side horn is longer than that of the right side, which is the opposite of what is seen in N. jarochita ( Fig. 6 ). There are also differences in the subgenital plate and the inferior appendages in N. palitla .

Male. Length 1.5 – 1.7 mm. 18 antennal segments, body brown in alcohol. Abdominal segment VIII annular. Segment IX incomplete dorsolaterally, posteriorly tapering ventrally with margins sclerotized with setal-bearing lobe on dorsum, anteriorly rounded; in ventral view deeply incised on posterior and anterior margins. Tergite X with pair of posterior asymmetrical horns, left longer than right, anteriorly fused with segment IX; in lateral view elongate, with apical horns short. Subgenital plate in lateral view bifid distally, ventral branch much longer than dorsal and tapering to acute apex, elongate seta laterally; in ventral view wide basally, narrowing distally to elongate medial process, which is flanked by a pair of elongate setae. Bracteoles bifid, dorsal and ventral branches similar in length, each with elongate apical seta. Inferior appendages thin and elongate in lateral view, curving slightly dorsad over length, ventral process about half length of appendage; in ventral view extending short of tip of subgenital plate, nearly parallel-sided, rounded apically, mesal processes about half length of appendages, wide basally, narrowing distally and bearing apical seta. Phallus tubular, constricted at mid-length and bearing thin paramere encircling shaft, apex divided into pair of processes of unequal length, ejaculatory duct protruding distally.

Type material. Holotype, male - Mexico, San Luis Potosi, Palitla , 5 June 1966, O.S. Flint, Jr. ( NMNH) . Paratype, same as holotype, 1 male ( NMNH).

Etymology. Named for the Mexican town of Palitla where the species was collected.

Notes. We have provided new illustrations of N. jarochita Bueno-Soria ( Fig. 6 ) for comparison. This specimen was collected by O. and C. Flint, Jr. from the Las Tuxtlas area near Balzapote, Mexico between 9 -13 May 1981 and kindly verified by J. Bueno and is deposited at the NMNH.

Figures

Figure 5. Neotrichia palitla, n. sp. Male genitalia. A. Lateral view; B. Ventral view; C. Dorsal view; D. Phallus, dorsal.

Figure 6. Neotrichia jarochita Bueno-Soria. Male genitalia. A. Lateral view; B. Ventral view; C. Dorsal view; D. Phallus, lateral.