Rozhnov, S. V.
Published in
Paleontological Journal
AbstractIn myelodactylids, the coil of the mesostele and the crown with a proxistele coiled in the same plane in the opposite direction result from the two fundamental processes in the evolution of echinoderms, which happened when their free-floating ancestor settled at the bottom and became attached to the ground by the ventral side of the anterio...
Kuzmina, T. V. Ratnovskaya, A. A. Madison, A. A.
Published in
Paleontological Journal
AbstractCurrently there is no unified view on the evolution of the brachiopod lophophore. In order to combine views of paleontologists and zoologists, the evolution of the brachiopod lophophore is analyzed here based on published data from fossil and recent species. A simple spirolophe is supposed to be plesiomorphic in brachiopods and gave rise to...
Anekeeva, G. A. Rozhnov, S. V.
Published in
Paleontological Journal
AbstractAs a result of examination of the collection of holdfasts of stemmed echinoderms from the Ordovician of the Leningrad oblast, Russia, all holdfasts are divided into two large groups: “unbranched” and “branched.” Three morphotypes of branched holdfasts are identified and described in detail. Morphogenetic transitions between morphotypes and ...
Mironov, A. N. Zhang, D. Wang, C.
Published in
Paleontological Journal
AbstractTwo species of the genus Bathycrinus were found in the Yap and Palau trenches. B. longicolumnalis n. sp. differs from other Bathycrinus species in having strongly bent lateral wings on the primibrachials and very elongate mesistele columnals. Ratio of length to diameter in the most elongate columnal is 7.1. The knobby processes are present ...
Lefebvre, B. Ausich, W. I.
Published in
Paleontological Journal
AbstractTwo new mitrate stylophorans are described from the upper part of the Santa Rosa Formation (Lochkovian) in the Central Subandean Zone of Bolivia and from the Jupiter Formation (Cybèle Member, late Llandovery) of Anticosti Island (Canada). Both stylophorans are identified as allanicytidiine anomalocystitids. The new Bolivian mitrate, Perikef...
Tkacheva, G. S.
Published in
Paleontological Journal
AbstractThe taxonomy of the fossil species Garumnaster michaleti, G. (Duncaniaster) luppovi, and Basseaster rostratus from the Lower Paleocene of the Mangyshlak Peninsula has been emended. Based on a comparison of morphological characters and the results of statistical analysis, Duncaniaster luppovi is assigned to the genus Garumnaster. The genera ...
Kalyakin, E. A.
Published in
Paleontological Journal
AbstractThree species of echinoids Conulusmatesovi Moskvin, Echinocorys ovata (Leske) and Micraster corbovis Forbes from Turonian and Campanian deposits of Lower Volga region, with traces of the sublethal injuries in the tests, are described. Such injuries are of particular interest as they are not related to commensalism, predation, parasitism, or...
Kum Sik Han, So, Kwang Sik Choe, Rye Sun Kim, Se Chan
Published in
Paleontological Journal
AbstractA species of gomphotheriids were firstly discovered from the Kidong Formation from Myongchon County, North Hamgyong Province, Democratic People’s Republic of Korea (DPRK). Although the tusk is broken and two of the teeth are so deeply worn, the new material displays some mandibular and dental feature combinations that might belong to the kn...
Kharlamova, A. S. Pavlov, I. S. Saveliev, S. V.
Published in
Paleontological Journal
AbstractThe history of discovery and study of the unique mummified brain of the 39 thousand cal. BP woolly mammoth fossil from Yakutian permafrost with special references to the big brain reconstruction method is provided. The preliminary description of the reconstracted gyri and sulci is described and paleoneurological perspectives are observed an...
Lopatin, A. V. Averianov, A. O.
Published in
Paleontological Journal
AbstractThe multituberculate assemblage from the Early Cretaceous Khovoor locality in Mongolia, based on the study of 112 specimens in PIN collection, includes three taxa: arginbaatarid Arginbaatar dmitrievae Trofimov, 1980 (=Monobaatar mimicus Kielan-Jaworowska et al., 1987, new synonym) and two eobaatarids, Eobaatar magnus Kielan-Jaworowska et al...
