Vestnik Zoologii

Volume 42, No. 5 (September-October, 2008)
abstracts

Investigations on cosmobiology in the Institute of Zoology, NAS of Ukraine. Cytological mechanisms of bone tissue loss under microgravity and hypokinesia. Rodionova N. V. — International space experi¬ments on cell culture and animals (white rats, non-apelike monkeys) carried out on biosatellites "Bi¬on-9", "Bion-10", "Bion-11", American space laboratory "SLS–2", and also ground experiments with modeled hypokinesia are described. Collaborators of the department of cytology and histogenesis of the Institute of zoology NAS of Ukraine participated these experiments in the framework of scientific cooperation with SSC IMBP RAS, grants EU, NASA, contracts with NSAU and other. The main results of experiments on the influence of microgravity and hypokinesia on development, differen¬tia¬tion, specific function and interaction of cells in zones of osteoplastic and resorptive processes in bone structures are provided. A conception of cells mechanisms in remodeling of bone tissue and development of osteoporosis under conditions of microgravity and hypokinesia is proposed. Perspective scientific investigations, including the "OBLAST" experiment (ISS) are considered.
Key words: bone tissue, cells, ultrastructure, microgravity, hypokinesia.

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On the Systematics of the Gall-Midge Supertribe Heteropezidi (Diptera, Cecidomyiidae) from the Rovno Amber. New Taxa and Combinations of the Tribes Heteropezini and Miastorini. Perkovsky E. E., Fedotova Z. A. — The elevation of rank of the tribe of paedogenetic gall midges to supertribe Heteropezidi (including three tribes — Leptosynini, Miastorini and Heteropezini) and its transfer to the subfamily Lasiopterinae are substantiated. All taxa with two- and three-segmented tarsi are included in the genus Heteropeza with subgenera Heteropeza s. str. and Heteropezina, stat. n. New fossil gall midges are described and figured from Klesov and Dubrovitsa deposits (Rovno amber). In total, three genera and five species of Heteropezini and one species of Miastorini are documented in Late Eocene Rovno amber, viz., Heteropeza (Heteropezina) marikovskii Fedotova et Perkovsky, sp. n., Tutkowskia Fedotova et Perkovsky, gen. n., T. ukrainica Fedotova et Perkovsky, sp. n., Ventosagloria Fedotova et Perkovsky, gen. n., V. gratshevi Fedotova et Perkovsky, sp. n. (type species), V. contradictoria Fedotova et Perkovsky, sp. n., V. fassa Fedotova et Perkovsky, sp. n., Miastor vlaskini (Fedotova et Perkovsky), comb. n. Eggs are found next to the female of Miastor vlaskini as the first confirmation of paedogenesis occurring as early as in the Late Eocene. Diagnoses of Heteropeza and Miastor are revised. Keys to tribes of Heteropezidi, genera of Heteropezini and Miastorini and species of Ventosagloria are provided.
Key words: Eocene, amber, Cecidomyiidae, gall-midges, Ukraine, new genera, new genera, new species, paedogenesis.

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New and Little-Known Ulidiidae (Diptera, Tephritoidea) from Europe. Kameneva E. P. — Improved keys to European species of Tetanops and Ulidia are provided. The shape of projections of the phallus glans is found to be essential to distinguish species in the genus Ulidia. Ulidia erythrophthalma (Meigen, 1826), U. albidipennis Loew, 1845, U. nigripennis Loew, 1845, U. parallela Loew, 1845 and U. atrata Loew, 1868 are shown to be separate species and redescribed with the use of genitalic characters. The following synonymy is established: Homalocephala albitarsis Zetterstedt, 1838 = Ortalis diopsides Walker, 1849, syn. n. = Ortalis costalis Walker, 1849, syn. n. Homalocephala apicalis (Wahlberg, 1838) = Psairoptera biseta Frey, 1909, syn. n. = Psairoptera similis Cresson, 1924, syn. n.; Homalocephala mamaevi Krivosheina et Krivosheina, 1995 is recorded for the first time from Europe (Austria, Sweden). Euxesta stigmatias Loew, 1873 is recorded for the first time in the Palaearctic Region based on a single unintentionally introduced specimen from Bulgaria. New finds of other ulidiid species in European countries are listed. Several species previously known only from Europe are recorded from Asia.
Key words: Diptera, Ulidiidae, Europe, new synonymy, new records.

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The Variability of Exoskeleton Elements in Polyplacocystis ambigua (Protista, Centrohelida). Gaponova L. P., Dovgal I. V. — Article dealt with the investigation of variability of the scales of periplast in Polyplacocystis ambigua (Penard, 1904). New quantative character of periplast scale (wide of rim) was introduced. Renewed diagnosis of P. ambigua where the quantative characteristics of perilpast scales are taken into account is given.
Key words: variation, periplast scales, Polyplacocystis, Centrohelida, Protista.

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Goodayia rostellatum gen. n., sp. n. (Protozoa) — a Monothalamous Foraminifera from the Black Sea. Sergeeva N. G., Anikeeva O. V. — Goodayia rostellatum gen. n., sp. n. is described from the open slope of the Black Sea along the northwestern part of the Crimean Peninsula (160 m water depth). The test of this very delicate, organic-walled, monothalamous (single-chambered) foraminifer is elongated and becomes wider from the middle to the apertural end. Test wall consists of two layers, and the protoplasm is separated from the inner layer by a more or less distinct space. The protoplasm is finely granular, homogeneous, without foreign inclusions. The single terminal apertural structure has an asymmetric, beak-like shape with the aperture located under the beak. The nucleus is situated more or less in the middle of the test. The shape and size of the test, the presence of two membranes, and the single terminal aperture are the features reminiscent of the genera Gloiogullmia and Rhynchogromia. However, the new genus has significant differences from these taxa, notably the absence of any foreign mineral or organic particles adhering to the test wall, and the beak-shaped apertural structure.
Key words: allogromiids, meiobenthos, coastal and upper anaerobic zones, the Black Sea.

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Extra Upper Premolars in a Specimen of Myotis blythii (Chiroptera, Vespertilionidae). Ghazali M. A. — A case of extra upper premolars is described in a specimen of Myotis blythii from Kerch peninsula (Ukraine, Crimea). Additional teeth are situated near the third premolars from both sides of the jaw. Giving into account their size and position it was supposed that they appear as a result of complete splitting of the third premolar primordium.
Key words: Microchiroptera, Myotis blythii, polydonty, Ukraine.

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