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.