Sericostoma taskent, Sipahiler, 2021

Sipahiler, Füsun, 2021, Males of the genus Sericostoma Latreille 1825 in Turkey (Trichoptera Sericostomatidae), Zootaxa 4965 (3), pp. 483-500: 494

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Sericostoma taskent

sp. n.

Sericostoma taskent   sp. n.

( Figs 30–34 View FIGS )

Material. Holotype male: Turkey, Konya, Hadim, Taşkent, Ermenek direction, 26 km South, 1700 m, 36°55′N, 32°29′E, (CD: U-127); leg. and coll. SİPAHİLER. GoogleMaps  

Paratypes: 9 males, 11 females: Same data as for holotype GoogleMaps   .

General description. Antennae and maxillary palps pale brown, wings dark brown, maxillary palps of males gradually large on dorsal and ventral parts ( Fig. 30 View FIGS ); legs yellowish; length of each anterior wing of male 11.0–12.0 mm (mean = 10.7 mm, n = 8), of female 11.0–15.0 mm (mean = 12.8 mm, n = 8).

Description of male genitalia ( Figures 31-34 View FIGS ): In lateral view, segment IX is rather broad and dilated anterolaterally in 80° angle. Preanal appendages short, digitate. In dorsal view, segment X parallel-sided, blunt apically. In lateral view, lateral prolongations of segment X long; basoventral branch short, apically oblique; mesoventral branch narrow, half as long as dorsal branch; dorsal branch also rather narrow, almost uniform in width, its apex pointed; in dorsal view, dorsal branches of lateral prolongations subapically each with corner on inner edge. In lateral view, dorsal branch of each inferior appendage somewhat narrow on subapical part, ventral margin nearly straight; apical margin of dorsal lobe rounded and slightly longer than acute ventral lobe; in ventral view, ventral branches of inferior appendages straight, rather slender, apices pointed and curved mesad. In lateral view, phallic apparatus narrow at base, apical half dilated, about 2.0X as thick as base; basoventral carina small, triangular, curved caudad, about as long as thickness of base.

Diagnosis: Sericostoma taskent   sp. n. resembles S. pinargozu   sp. n. The following differences are seen in the males: The maxillary palps of S. taskent   are dilated in the apicodorsal part, whereas in S. pinargozu   sp. n. they are gradually dilated. The differences in the male genitalia are as follows: In S. taskent   , segment IX is shorter laterally; the preanal appendages are smaller and shorter, whereas in S. pinargozu   sp. n. segment IX is longer laterally, the preanal appendages are long and broader; in S. taskent   sp. n. the lateral prolongations of segment X are broader in lateral view than those of S. pinargozu   sp. n. and the distance between dorsal and mesoventral branches is smaller than between those of S. pinargozu   . In addition, the dorsal lobe of each inferior appendage of S. taskent   sp. n. is smaller than that of S. pinargozu   sp. n.

Remarks. The habitat of S. taskent   is also different; the holotype and paratypes of Sericostoma taskent   sp. n. were collected from a spring 1–2 m in width.