New Brachiopod Species <Emphasis Type="Italic">Leurosina katasumiensis</Emphasis> (Chonetida) from the Kungurian Katasumi Limestone of the Kusu Area,Central Japan

A new brachiopod species, Leurosina katasumiensis sp. nov. (order Chonetida, family Rugosochonetidae, subfamily Rugosochonetinae), is described from the Kungurian Stage (Lower Permian, Nabeyama Formation) of central Japan.     

Studies of fossil brachiopods of Mongolia: Ordovician,Silurian, Devonian,Carboniferous, and Permian

Fossil brachiopods from the Ordovician, Silurian, Devonian, Carboniferous, and Permian deposits of Mongolia have been studied for the last forty-five years by the Joint Soviet-Mongolian (later RussianMongolian) Paleontological and Geological Expeditions. New data on the taxonomic composition, stratigraphic and geographic distribution of the brachiopod assemblages have been obtained. The brachiopod systematics has been further refined and detailed, and the stratigraphic and correlation scales and biogeographic reconstructions have been elaborated for the Paleozoic of Mongolia.     

New Upper Devonian brachiopod genus <Emphasis Type="Italic">Paraimbrexia</Emphasis> (Order Spiriferida) from the Abyshevo Horizon of the Kuznetsk Basin

A new spiriferid genus Paraimbrexia with the type species Imbrexia topkensis Besnossova, 1959 is established within the family Imbrexiidae Carter, 1992 from the Abyshevo Horizon, Famennian, Upper Devonian of the Kuznetsk Basin. Revision of the type material of I. topkensis revealed that this species strongly differs from the other species of Imbrexia Nalivkin, 1937 in details of shell exterior and interior.     

Large extinctions of articulate brachiopods in the paleozoic and their ecological and evolutionary consequences

The largest Paleozoic extinctions of articulate brachiopods occurred at the Frasnian—Famennian boundary in the Late Devonian and at the Permian—Triassic boundary. Both extinctions affected taxa of all levels, including orders, but differed in scale, course, and ecological and evolutionary consequences. The Frasnian—Famennian extinction event was selective and evolutionary activity after the crisis varied in different orders. However, in the Early Carboniferous, the brachiopod diversity was mostly restored in comparison with the Devonian maximum. In particular groups, preadaptation played a role in changes in diversity and reconstruction of communities. The brachiopod composition at this boundary changed sharply. The extinction event at the end of Permian was global and accompanied by changes in the biota. Later, in the Meso-Cenozoic, the brachiopod diversity was not restored, and bivalves acquired primary importance in various bottom communities of different sea zones where Paleozoic brachiopods previously dominated. Extinction of brachiopods at this boundary was long and gradual. The symptoms of the ecological crisis in the development of Permian brachiopods are recognized beginning from the Roadian Age, which was probably the onset of this crisis.     

New species of <Emphasis Type="Italic">Fanichonetes</Emphasis> Xu et Grant (Brachiopoda,Chonetida) from the Lower Permian of South Korea

A new chonetid species, Fanichonetes minusculus, from the Lower Permian of Pamchi Formation of the northeastern South Korea is described and assigned to the subfamily Rugosochonetinae of the family Rugosochonetidae.     

New late Permian Chonetids (brachiopoda) from Southeastern Pamirs

New chonetid genera and species Subtilichonetes pamiricus gen. et sp. nov. (subfamily Undulellinae, family Rugosochonetidae) and Parvichonetes igrimiusensis gen. et sp. nov. (subfamily Tornquistiinae, family Anopliidae) are described from the Takhtabulak Formation, Changhsingian Stage of the Upper Permian of Southeastern Pamir.     

A new large chonetid (Brachiopoda) from the Middle Permian of the southern Kitakami Mountains, northeast Japan

A new chonetid genus and species, Kitakamichonetes multicapillatus gen. et sp. nov. (subfamily Chalimochonetinae, family Rugosochonetidae), from the Middle Permian (Wordian-Capitanian, Kanokura Formation) of the southern Kitakami Mountains (northeast Japan) is described.     

Iraida Pavlovna Morozova (1919–2007)

Paleontological Journal -