Types of the Dipterans of the Families Cypselosomatidae, Micropezidae, and Tethinidae (Diptera, Acalyptratae) in the Collection of the Zoological Institute of the Russian Academy of Sciences in St. Petersburg

A catalogue of the types (holotypes, paratypes, lectotypes, and paralectotypes) of the species of the families Cypselosomatidae, Micropezidae, and Tethinidae (Diptera, Acalyptratae) described by T. Becker, V.L. Beschovski, E.P. Nartshuk, A.L. Ozerov, A.I. Shatalkin, and Á. Soós, deposited in the collection of the Zoological Institute of the Russian Academy of Sciences in St. Petersburg, is presented. The lectotype of Calobata nigrolamellata Becker, 1907 is designated. Photographs of the specimens and their labels are given.

In the present paper, the type material of the dipterans belonging to three families of the Acalyptratae group, deposited in the collection of the Zoological Institute, Russian Academy of Sciences, St. Petersburg (ZISP), is described.
The photographs were taken with a Canon EOS 800D camera with a MP-E 65 mm objective and put together and processed by Helicon Focus 6 software.
Family CYPSELOSOMATIDAE Hendel, 1931 This very small family includes two genera from Eastern Asia and Australia. In Russia, one species is known from the Far East. The larvae of the Australian species develop in bat guano. Shatalkin, 1994Shatalkin, 1994 The fl ies vary from small to medium-sized (3.5-15 mm), have a narrow body and long stilt-shaped legs. The family is world-wide distributed, but is most diverse in the tropical regions. Approximately 500 species of 40 genera are described in the World fauna, with up to 30 species of 5 genera known from Russia. Larvae of most of the species are saprophagous, those of Micropeza corrigiolata (Linnaeus, 1758) eat out the root nodules of Fabaceae. Becker, 1907Becker, 1907.  Satschou, 24-27.VI.(18)95 (Roborowski)." The type has not been found in the ZISP collection. Becker, 1907Becker, 1907 (Fig. 2).

Calobata nigrolamellata
The species was described from 3 specimens, 2 of which were found in the ZISP collection. Lectotype, designated here, "[China]: Bomyn (Ichegyn) R. ne [northestern] Tsaidam, Gobi, [end of] VI.(18)95 (Rob. [orovskii], Kozlov)" (in Cyrillic). The inventory number is INS_DIP_0000902. This male perfectly corresponding to T. Becker's description is designated as the lectotype, since we failed to examine the specimen deposited in Berlin, which Á. Soós probably planned to designate as the lectotype: during his visit to St. Petersburg (Leningrad at that time) he supplied the specimen with his label "paralectotypus des. Soós, 1979," but there is no lectotype designation in his publications. Paralectotype: a female with a similar label. Another male with a label as that of the lectotype is deposited in the Zoological Museum in Berlin; it was donated to T. Becker when he examined the ZISP collection (Schumann, 1988 : 102). Ozerov, 2008Ozerov, 2008 Family TETHINIDAE Hendel, 1916 The fl ies are small (1.5-3.5 mm), with a gray body covered with dense pruinosity. The family is world-wide distributed and comprises about 100 species. In Russia, about 20 species of 3 genera are known. The fl ies are halophilous; they occur on the sea shores, on dunes, near salty lakes, and in saline meadows, and also often inhabit technogenic landscapes. The mode of life of the larvae is unknown. Becker, 1907Becker, 1907 : 308 (Fig. 4).

FUNDING
The study was performed based on the collection of the Zoological Institute, Russian Academy of Sciences (state project no. AAAA-A19-119020690082-8).