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

Sericostoma taskent sp. n.

( Figs 30–34 )

Material. Holotype male: Turkey, Konya, Hadim, Taşkent, Ermenek direction, 26 km South, 1700 m, 36°55′N, 32°29′E, 28.vi.2000 (CD: U-127); leg. and coll. SİPAHİLER.

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

General description. Antennae and maxillary palps pale brown, wings dark brown, maxillary palps of males gradually large on dorsal and ventral parts ( Fig. 30 ); 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 ): 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.

Figures

FIGS. 30–34. Sericostoma taskent sp. n. male: 30, head and right maxillary palp, right lateral. 31–33, male genitalia: 31, left lateral; 32, dorsal; 33, ventral. 34, phallic apparatus, left lateral. Abbreviations: bb = basoventral branch of lateral prolongation of segment X; bc = basoventral carina; db = dorsal branch of lateral prolongation of segment X (paired); dbi = dorsal branch of inferior appendage (paired); dl = dorsal lobe of dorsal branch of inferior appendage (paired); lp = lateral prolongation of segment X (paired); mb = mesoventral branch of lateral prolongation of segment X (paired); mp = maxillary palp (paired); pa = preanal appendage (paired); sıx = segment IX; sx: segment X; vb = ventral branch of inferior appendage (paired).