Hydropsyche masula Oláh & Johanson, 2008

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), Zootaxa 1802, pp. 1-248 : 160-162

Hydropsyche masula Oláh & Johanson , new species

Fig. 270–274

This species is close to H. iokaste Malicky from Iran due to the similar shape of segment X in lateral view. Hydropsyche masula is easily recognized by the presence of more strongly produced and more well-developed angular lateral projection situated before the apex of the phallotheca, which is cleft and undulating. In H. iokaste these projections are less developed and with less undulating apices; the median keel on tergum IX widens apically, not narrowing as in H. iokaste . The clavate keel is unique in this species cluster. All other species have a narrowing keel in dorsal view; paired, smooth, mesocaudal lobes strongly produced and pointed in dorsal view. These lobes are less developed in H. iokaste . In addition, the harpagones are rather long, with dorsally stepped apex in lateral view.

Male. Body and wings brown with irrorated pubescence. Forewing membranes uniformly coloured. Sternite V with very small, superficial protuberence on both sides, continuing into short, internal, narrow tube connecting to rounded, large gland on both sides before basodorsal margin on sternum V. Maxillary palp formula I-(III-IV)-II-V, segment V as long as sum of segments I–IV. Head dorsum brown, with 9, well discernible, light warts colour. Swollen setal wart present on proepisternum. Pretarsal claws symmetrical, without laterally flanked setal bundle. Spur formula 244. Protibiae with posteroapical spur almost equal to anteroapical spur.

Wings. Venation typical for the genus. Forewing crossveins m-cu and cu separate. Sc and R separate before costa. Cu2 and A1 meeting before costa. Hind wing Sc and R meeting before costa apically of crossvein r at distance from r equal to 2 times length of r; r basally of s by 0.2 times length of r. Stem of M and Cu1 running closely. Median cell closed. Fork 1 present. Forewing length 9.2 mm.

Male genitalia. Abdominal segment IX fused annularly, short ( Fig. 270). Median keel long, broadening apically ( Fig. 271); anterior margin almost regularly arciform; dorsum 2 times longer than ventrum ( Fig. 270). Antecosta well developed, narrow before margins. External groove of antecostal sutures present. Apical lobe on posterolateral margins short, nearly triangular ( Fig. 270). Posterior spine row continuous from median keel slope to apex of apical lobes. Depression between segments IX and X narrow, shallow; in lateral view widely V-shaped, almost right angled ( Fig. 270). Body of segment X quadrangular ( Fig. 270), dorsal margin short, ventral margin long; laterally rounded in dorsal view ( Fig. 271). Lateral setose areas (preanal appendages) located apically at ventral half, forming compact, circular setose areas fused with reduced apicoventral setose lobes. Apicoventral setose lobes comprising setose areas at apical margin. Dorsal interlobular gap U-shaped in dorsal view ( Fig. 271); secondarily developed by well produced pair of smooth mesocaudal lobes. Apicodorsal setose lobes shifted basad on dorsum, forming fused pair of circular setose ridges of double crest, separated by smooth, central depression. Smooth cavity on anterolateral area of segment X deep. Rim of cavity anteriorly surrounded by posterior rim of segment IX; ventrally by longitudinal suture located under smooth cavity on each side; anteriorly by transverse suture on each side. Coxopodites short, robust, with dorsal margin slightly sinuous ( Fig. 270); nearly straight in ventral vies ( Fig. 272). Harpagones broad, parallel-sided before apex ( Fig. 270), with dorsal stepped apex in lateral view; curving mesad with almost spatulate broadening apex in ventral view ( Fig. 272). Phallic apparatus arciform, with nearly straight dorsal margin. Endophallus forming short tube narrowing to gonopore, filling only straight apical half of phallotheca ( Fig. 273). Angular, sub-apical, lateral projection before cleft apex of phallotheca produced; apical part representing pair of fused, sclerotized endothecal processes separated by deep cleft. Endophallus with pair of small rounded, long, vertical phallotremal sclerites; small, circular in ventral view ( Fig. 274).

Holotype male: IRAN: Talesh Montain , Masula River, 12.viii.1990, light [J. Oláh] - ( OPC, in alcohol).

Paratype: same data as holotype - 1 male ( OPC, alcohol) .

Distribution. Iran.

Etymology. masula , after the type locality, River Masula.