Nyctiophylax (Nyctiophylax) senticosus Morse, Zhong & Yang

Morse, John C., Zhong, Hua & Yang, Lian-fang, 2012, New species of Plectrocnemia and Nyctiophylax (Trichoptera, Polycentropodidae) from China, ZooKeys 169, pp. 39-59 : 46-48

Nyctiophylax (Nyctiophylax) senticosus Morse, Zhong & Yang sp. n. Fig. 5

Nyctiophylax (Nyctiophylax) senticosus Li 1998: 89-90, figs 4.1-4.3, 4.9-4.12, nomen nudum.

Type materials.

Holotype male, PRC, An-hui Province, Jin County, Song Village, Ding-xi Stream, 33 km E. of Jin County, 30.70°N, 118.35°E, 08-vi-1990, 120 m elevation, collected by JC Morse, Sun Chang-hai, Yang Lian-fang; deposited in NAU.

Paratypes.

PRC, An-hui Province: same data as holotype, 4 males (NAU).

PRC, Guang-xi Province: Shang-si County, Na-lin Stream, tributary of Ming-jiang River, 2.0 km NW of main entrance to Mt. Shi-wan-da National Forest Park, 21.9070°N, 107.8966°E, 281 m elevation, 05-vi-2004, Coll. JC Morse, Sun Chang-hai, 3 males (NAU); Shang-si County, Na-lin Stream, tributary of Ming-jiang River, 2.2 km NW of main entrance to Mt. Shi-wan-da National Forest Park, 21.9062°N, 107.8962°E, 284 m elevation, 05-vi-2004, Coll. Zhou Xin, Karl M Kjer, 2 males (NAU); Shang-si County, Mt. Shi-wan-da National Forest Park, Shi-tou Stream, tributary of Ming-jiang River, 1.35 km SW of main entrance to Park, 21.9022°N, 107.9046°E, 300 m elevation, 05-vi-2004, Coll. Yang Lian-fang, CJ Geraci, 4 males (NAU); Xing-an County, Liu-dong Stream and Hua-jiang Stream confluence, ~1 km S of Hua-jiang town, 25.7657°N, 110.4820°E, 262 m elevation, 16-vi-2004, Coll. Yang Lian-fang, JC Morse, Sun Chang-hai, CJ Geraci, 4 males (NAU).

Diagnosis.

The male genitalia of Nyctiophylax (Nyctiophylax) senticosus are somewhat similar to those of Nyctiophylax (Nyctiophylax) sinensis Brauer, 1865 in the deeply inserted dorsal processes of the preanal appendages set under tergum VIII, but differ from those of Nyctiophylax (Nyctiophylax) sinensis by the inferior appendages with their acute apices strongly curved dorsad in the new species; they are almost straight in lateral view with the apices rounded in Nyctiophylax sinensis .

The male genitalia of Nyctiophylax (Nyctiophylax) senticosus are also very similar to those of Nyctiophylax (Nyctiophylax) maath (Malicky & Chantaramongkol, 1993) in the following characters: 1) The preanal appendages have a ventral lobe; 2) the preanal appendages have their dorsal processes inserted under tergum VIII; and 3) the inferior appendages have basomesal processes. However, the differences between the 2 species are obvious. The apex of each inferior appendage of Nyctiophylax maath is straight, like that of Nyctiophylax sinensis , while it is up-curved in the new species. The basomesal processes of the inferior appendages in Nyctiophylax maath are hook-like, mostly exposed in ventral view, but in the new species club-like, densely covered with tiny teeth apically, and with only the apices exposed.

Description of adult male.

Head grayish brown with yellowish antennae, pronotum light brown, meso- and metanota brown, with thoracic legs yellowish, forewings light brown. Length of body with folded forewings: 4.5-4.8 mm (n=10).

Male genitalia. Tergum IX parabolic in dorsal view (Fig. 5C), membranous, almost transparent. In lateral view (Fig. 5A), sternum IX obliquely protruded anterad subventrally, posterolateral margins vertical and sinuous, ventral surface horizontal and as long as anteroventral margins; in ventral view (Fig. 5B), posterior and anterior margins each with wide, shallow excision. Tergum X semi-sclerotized, setose, deeply divided apicomesally (Figs 5A, 5C).Preanal appendages slightly longer than tergum X, each with broad lobe along basal 2/3rds of ventral edge (Fig. 5A), this lobe with setose basoventral apex directed ventromesad in ventral view (Fig. 5B); dorsal processes of preanal appendages inserted deeply under tergum VIII, each consisting of broad basal plate with long, slender process coiled laterad, ventrad, and then caudad to acute, out-turned apex. Inferior appendages depressed (flattened dorsoventrally), about 1.5 times as long as sternum IX, each with acute apex curved dorsad; with short, club-like, basomesal projection hidden inside sternum IX, its apex densely covered with tiny teeth. Phallus with thick phallobase half as long as entire phallus; pair of parameres curved dorsad; phallicata membranous, enlarged to apex, with 2 spines among retracted membranes.

Female and immature stages.

Unknown.

Distribution.

Oriental Biogeograpic Region, China (An-hui, Guang-xi).

Etymology.

Senticosus, Latin, "of many spines," referring to the spines of the phallus.