Neotrichia mentonensis Frazer and Harris

Harris, Steven C. & Rasmussen, Andrew K., 2010, The Neotrichia caxima Group (Trichoptera: Hydroptilidae) in the southeastern United States, Zootaxa 2608, pp. 25-44 : 40-41

Neotrichia mentonensis Frazer and Harris

( Figs 15 , 16 )

Frazer and Harris (1991): 7, 3

Neotrichia mentonensis is endemic to several tributaries of the Little River along the Alabama/ Georgia state line. Males are separated from the similar N. dracanamalama on the basis of the inferior appendages which have an undivided dorsal process in ventral view ( Fig. 15 B).

Female. Length 1.9–2.1 mm, 17 antennal segments, brown in alcohol. Abdominal segments VII–X typical for genus, sternum VIII with large, rectanguloid mesal plate ( Fig. 16 B) similar in general appearance to that of N. rasmusseni . However, anterior margin of plate in N. mentonensis relatively straight compared to sinuate margin seen in N. rasmusseni . Bursa copulatrix ( Fig. 16 A) with tapering copulatory channel about same length as genital chamber; this chamber with sclerotized bands laterally extending anteriorly as elongate processes, tapering to acute apex, bell-shaped mesal sclerite divergent anteriorly.

Material examined. Alabama, DeKalb County, West Fork of Little River @ Union Bridge, nr. Cloudmont Resort, 22 June 1988, Frazer, 53, 2Ƥ. Georgia, Chattooga County, Gilreach Creek @ Co. Hwy. 234, N34.34, W85.27, 21 July1989, Frazer, 1Ƥ.

Distribution. AL, GA.

Figures

FIGURE 15. Neotrichia mentonensis, male genitalia. A. Left lateral view, B. Ventral view, C. Dorsal view, D. Phallus, left lateral view.

FIGURE 16. Neotrichia mentonensis, female genitalia. A. Abdominal segment VIII, ventral view, B. Bursa copulatrix, ventral view.