Rhyacophila sajadi, Saini, Malkiat S. & K, Lakhwinder, 2012

Saini, Malkiat S. & K, Lakhwinder, 2012, Two new species of the genus Rhyacophila Pictet (Trichoptera: Rhyacophilidae) from the Indian Himalayas, Zootaxa 3478, pp. 309-312 : 309-311

Rhyacophila sajadi sp. nov.

( Figs. 1–4 )

Diagnosis. Assigned to the R. naviculata Group ( R. naviculata Branch of Schmid 1970), this new species resembles R. kyadongpa Schmid 1970 in the general shape of the male genitalia, but can be easily distinguish from it by the following characters in lateral view:

In R. sajadi , the lateral processes of the apicodorsal lobe of segment IX are broader than the median processes (spine-like apically) and with a triangular membranous projection, whereas in R. kyadongpa the median processes (not spine-like apically) are broader than the lateral processes and lateral processes are without any triangular projection. The anal sclerite is C-shaped in R. sajadi but is elongated and not C-shaped in R. kyadongpa . The phallicata is curved downwards apically in R. sajadi and it is straight in R. kyadongpa . The dorsal appendage of the phallic apparatus is rounded apically in R. sajadi but it is pointed apically in R. kyadongpa . The dorsal surface of the terminal segment of each inferior appendage is sloped in R. sajadi , but is elevated and convex in R. kyadongpa .

Male: In alcohol, antennae brown, forewings yellowish-brown with light yellow patches. Length of each antenna 10.4 mm and length of each forewing 14.0 mm. Genitalia ( Figs. 1–4 ): In dorsal view, apices of lateral processes of apicodorsal lobe of segment IX truncate; in lateral view, median process of apicodorsal lobe of segment IX pointed and lateral processes 2 times broader than median process apically and with medially directed triangular membranous projection in middle of its proximal half. Anal sclerite C-shaped. Dorsal appendage of phallic apparatus digitiform; phallicata sickle shaped; parameres absent. Dorsal surface of terminal segment of each inferior appendage sloped and with minute spinules.

Etymology. The species is named for Sajad Hussain Parey of Punjabi University, Patiala, India for providing encouragement.

Material examined. Holotype 3 INDIA: Uttarakhand, Badrinath, Garhwal hills, Alaknanda River, 30°44ʹN 79°29ʹE, 3400 m, 22-vi-2011, collector Lakhwinder ( PUPM).

Figures

FIGURES 1 – 9. Rhyacophila spp. nov., male genitalia. 1 – 4, Rhyacophila sajadi sp. nov.: 1, left lateral view; 2, dorsal view; 3, inferior appendages, ventral view.; 4, phallic apparatus, lateral view. 5 – 9, Rhyacophila armitageorum sp. nov.: 5, left lateral view; 6, ventral view; 7, dorsal view; 8, phallic apparatus, lateral view; 9, ventral plate of phallic apparatus, dorsal view. AS = anal sclerite; DA = dorsal appendage of phallic apparatus; D. IX = dorsal apical lobe of segment IX; INF = inferior appendage; LA = lateral arm of ventral plate of phallicata; LP = lateral process of apicodorsal lobe of segment IX; MP = median process of apicodorsal lobe of segment IX; PAR = paramere; PH = phallicata; TMP = triangular membranous projection; VPPH = ventral plate of phallicata; X = segment X.