Sericostoma Latreille 1825

Sipahiler, Füsun, 2021, Males of the genus Sericostoma Latreille 1825 in Turkey (Trichoptera Sericostomatidae), Zootaxa 4965 (3), pp. 483-500 : 484

Sericostoma Latreille 1825

Diagnosis. Adults of genus Sericostoma may be distinguished from the other genera of the family found in the West Palearctic by having an open discoidal cell on the posterior wings (McLahlan 1874–1880). Hind wings of the other genera found in the West Palearctic have a closed discoidal cell. The maxillary palps of males are the most important diagnostic character of the genera. The maxillary palps of the male of Sericostoma are large, 3-segmented ( Schmid 1947), each with the first two segments small, very difficult to see; the apical segment very large, oval, and masking the face, with the external surface convex and the internal surface concave with a bunch of very fine pale-yellow hairs; the apical ends of the third segments of the pair of maxillary palps reach the bases of scapes of the antennae. In some species the maxillary palps are smaller than in other species ( McLachlan 1874 –1880), S. pedemontanum McLachlan 1876 and S. personatum Spence 1826 are examples of species with males having smaller maxillary palps. The antennal scapes are rather large, nearly triangular ( Schmid 1947). The labial palps are not prominent. In females the maxillary palps are long, 5-segmented, and without conspicuous diagnostic characters.