Males of the genus Sericostoma Latreille 1825 in Turkey (Trichoptera Sericostomatidae) Sipahiler, Füsun Zootaxa 2021 2021-04-29 4965 3 483 500 6YJKY SIPAHILER 2000 SIPAHILER 2000 [151,577,654,683] Insecta Sericostomatidae Sericostoma Animalia Trichoptera 4 487 Arthropoda species ida  ( Figs 6–10)   Material examined.  Turkey, Balıkesir,  25 kmEast of Edremit, Güre-Zeytinli, Kazdağları, Ayı Stream,  400 m, 39°40′N, 26°49′E,  7.viii.1994, 1 male( holotype), 3 females(CD: U-95);  Balıkesir,  25 kmNorth, Bayramiç, Evciler, Ayazma Milli Parkı,  500 m, 39°45′N, 26°59′E,  5.viii.1994, 2 males, 4 females( paratypes) (CD: U-96), all leg. and coll. SİPAHİLER.  General description: The first 8 or 9 segments of the antennae are annulated; the maxillary palps are large ( Fig 6). Length of each male forewing 10.0–10.5 mm (mean = 10.25 mm, n =2), of each female forewing 10.5–11.0 mm (mean = 10.75 mm, n = 2). Maxillary palps of male large, like those of the other species of the genus  Sericostomafound in Turkey( SİPAHİLER, 2000).   Description of male genitalia.( Figs 7–10) In lateral view, basoventral branch of each sclerotized lateral prolongation of segment X is short, quadrangular, its apex stout and truncate; mesoventral branch very short, 1/5 as long as dorsal branch, quadrangular, with apex truncate and directed ventrad, dorsal branch longer, with small triangular pointed projection located subdistally on inner edge, and apically pointed. In lateral view, phallic apparatus having apical portion 1.4X as thick as basal portion, with basoventral carina triangular and as long as thickness of base.   Diagnosis:  Sericostoma idadiffers from the other species of the genus  Sericostomain Turkeyby having short quadrangular mesoventral projections of the lateral prolongations of segment X, which are directed ventrad. Basoventral projections are also quadrangular. It resembles  S. grusiense, which has the mesoventral projections of the lateral prolongations of segment X also directed ventrad, but in  S. grusiensethey are pointed at the tips. It resembles also  S. flavicorne, but the mesoventral projections of that species are directed caudad and are pointed apically.   Remarks:  Sericostoma idais found in northwestern Turkeyin a small area of the National Park of Kazdağlar Mountains (Ida Mountains). 3110844306 1994-08-07 Turkey Gure-Zeytinli 400 39.666668 Ayi Stream 1167 26.816668 Kazdaglari 4 487 4 3 1 Balikesir holotype 3110844315 1994-08-05 Turkey Bayramic 500 39.75 Ayazma Milli Parki 1167 26.983334 Evciler 4 487 6 4 2 Balikesir paratype