We describe two new genera and species of monothalamous Foraminifera from a coastal site in Balaclava Bay, Crimea. Nellya rugosa gen. and sp. nov. has an elongate, approximately oval test, 120-360 μm long, somewhat resembling a rice grain and with a single nipple-like apertural structure located at the distal end, which is often rather truncated. The wall is whitish, opaque, somewhat flexible and composed of jumbled mineral grains, mostly <10 μm in size, overlying an inner organic layer. Cedhagenia saltatus gen. and sp. nov. has an approximately lenticular test, 150-300 μm long, with a single aperture usually associated with a short, delicate, slightly flared extension of test. The wall is whitish, flexible, translucent with shiny highlights, and composed of a thin layer of plate-like mineral grains, mostly <5 μm in size, overlying an inner organic layer. In both N. rugosa and C. saltatus, the cytoplasm is finely granular, without stercomata. A third species, identified as Vellaria pellucidus Gooday and Fernando 1992 and closely resembling the type material of this species from the Vellar Estuary (India), occurs occasionally in our Balaclava Bay material. Samples from another Crimean Bay (Kazach'ya) yielded an undescribed species of Psammophaga that is most similar to a species from Southampton (UK). The agglutinated wall encloses a cell body that is packed with mineral grains. Analysis of the SSU rDNA sequences obtained from these four species confirmed the position of Psammophaga and Vellaria. Nellya is shown to be a sister group to Vellaria + Psammophaga clade but its position is not well resolved. Cedhagenia belongs to a very different clade of monothalamous foraminiferans, which includes also Ovammina and Cribrothalammina.
Монография представляет собой первую сводку, посвященную одной из групп бентосных протистов Чёрного и Азовского морей -мягкораковинным фораминиферам. Основной объект -моноталамусные фораминиферы, обладающие нежными белковыми раковинами, не подверженные фоссилизации, не попадают в поле зрения микропалеонтологов и геологов, что ограничивает возможности изучения некогда существовавших фораминифер и истории их видообразования, решения важных вопросов палеогеографии данных протистов. Главная задача авторов -познакомить читателя с группой мягкораковинных фораминифер, показать их морфологическое многообразие, дать краткие диагнозы видов и морфотипов, требующих дальнейшего изучения, акцентировать внимание на количественной оценке этих протистов как компонента мейобентоса, чтобы привлечь внимание учёных к всестороннему их изучению и оценке их роли в морских донных экосистемах.Для широкого круга специалистов в области биологии, экологии, охраны природы, для преподавателей вузов, студентов.
Recent studies indicate that monothalamous (single-chambered) foraminifera are an important component of meiobenthic communities in the brackish, coastal waters of the Black Sea. The dominant taxa include Psammophaga and Vellaria, both of which are common in estuarine settings in other parts of the world. Here, we describe Tinogullmia lukyanovae sp. nov. from the Crimean and Caucasus regions of the Black Sea. The new species is several hundreds of microns in size. It is characterized by a more or less symmetrical, spindle-shaped to cylindrical, organic-walled test with two terminal apertural structures, usually in the form of rounded or more elongate, nipple-like projections. The protoplasm is ¢nely granular and a nucleus is not visible. The new species typically occurs in well-oxygenated water at depths of a few tens of metres or less. A specimen from a 250-m deep site o¡ the Caucasus coast, tentatively assigned to T. lukyanovae sp. nov., is of particular interest because it occurs at a depth where the bottom water is anoxic and sulphidic.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.