Potamyia assamana Olah & Schefter 2008, new species
Creators: name: Oláh, J.
name: Johanson, K. A.
Publisher: name: Zenodo
Year: 2008
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Trichoptera
Hydropsychidae
Potamyia
Potamyia assamana

description: Potamyia assamana Oláh & Schefter, new species   
 Fig. 384 – 387   
 This species is similar to P. daphne Malicky described from Kerala, and later recorded from Karnataka and Tamil Nadu (Oláh et al. 2006a). It differs from P. daphne in the straight, not rounded anterior margins of segment IX; longer segment X; U-shaped, dorsal interlobular gap; phallotheca with straight, not undulating dorsum; and very large sub-apical ventral lobes.   
Male. Body and wings light brown, with brown pubescence. Forewing membrane without maculation. Antennae less than twice as long as forewings. Abdominal segment V with minute, pointed, lobes. Spur formula 144. Protibiae with small spur. Pretarsal claws asymmetrical, laterally flanked by setal bundle. Mid- and hind-leg claws asymmetrical.  
Wings. Forewing crossveins m-cu and cu running closely. Cu2 and A joining before wing margin. Hind wing stem of M plus proximal part of M3+4 almost tangential, running parallel with Cu1. Fork 1 present. Forewing 8.0 mm.  
Male genitalia. Abdominal segment IX fused annularly, short; tergum half as long as sternum (Fig. 384). Anterior margins of segment IX straight, with posteriorly shifted dorsal section in lateral aspect (Fig. 384). Apical lobe on posterolateral margins small, almost absent, located immediately above narrow articulation cavity of gonocoxites (Fig. 384). Spine row on posterior margins of segment IX almost complete, not intermittent, with short gaps; spine lengths heterogenous; spines on laterocaudal protuberances of dorsum about 2 times longer than spines on posterior margina of segment IX; spines on apical lobes stiff, very densely set (Fig. 384). Intersegmental step between segments IX and X deep, partly occupied by pair of setose protuberances; appearing as setose laterocaudal lobes. Body of segment X long, with ventrad curving distal half ending in dorsad curving hook in lateral aspect (Fig. 384); bilobed in dorsal aspect (Fig. 385); ventrum bellied; curving apicoventral spiny hook dominating distal part (Fig. 384). Smooth mesal lobe reduced; dorsal interlobular gap U-shaped, wide, deep to mid-length of apex (Fig. 385). Dorsad curving apex of spiny hooks separated by dorsal interlobular gap, forming pair of birdbeak-shaped processes armed with mesad directed, stiff setae; shape highly dependent on observation angle. Setose area present on basal dorsolateral areas of segment X; process between segment IX and X absent. Pair of well-developed protuberances representing laterocaudal lobes present. Transverse and longitudinal sutures invisible. Pair of setose areas (superior or preanal appendages) circular, located at mid-length abouve ventral margin (Fig. 384), or representing setose dorsal ridge possibly homolog with vestigial dorsal setose lobes. Coxopodites significaltly strongly exceeding apex of segment X; rod-shaped, slightly broadening apicad from mid-length; slightly bending ventrad; uniformly curving mesad in ventral view (Fig. 386). Harpagones short, broad, tapering along their lengths in lateral view (Fig. 384); broader, pointing mesad in ventral view (Fig. 386). Phallotheca with enlarged phallobase (Fig. 387); straight horizontal shaft with regular straight dorsum; ventral subapical broadening strongly enlarged. Endophallus forming narrow tube at gonopore near bottom of phallobase. Chitinized endothecal process small, circular. Phallotremmal sclerites broad; vertical (Fig. 387).  
 Holotype male: INDIA: Assam, Kameng, Salary, 9.vii.1961 [F. Schmid] - (ROM, pinned).   
 Etymology. assamana, named after the type locality, Assam.
description: Published as part of Oláh, J. & Johanson, K. A., 2008, Generic review of Hydropsychinae, with description of Schmidopsyche, new genus, 3 new genus clusters, 8 new species groups, 4 new species clades, 12 new species clusters and 62 new species from the Oriental and Afrotropical regions (Trichoptera: Hydropsychidae), pp. 1-248 in Zootaxa 1802 on page 230