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Cassidulinacea
The Cassidulinacea is a superfamily of benthic amoeboid foraminifera in the order Rotaliida that has been extant from the Paleocene down to the present. Tests are composed of secreted, optically radial or granular, perforate calcite with chambers biserially coiled at least in the early part, Apertures are usually an interiomarginal slit, but may become terminal and may have secondary features. Cassidulinacea is included in the suborder Rotaliina by Loeblich and Tappan, e.g. 1964 and 1988, since redefined as the Rotaliida and since reassigned to the Buliminida in Sen Gupta 2002. Two families are included. They are the: :Cassidulindae, and :Cassidulinitidae The Cassidulinidae, which has a range from the Paleocene to the present, includes most of the genera. The Cassidulinitidae which includes only ''Cassidulinita'' is restricted to the Pliocene. References Further reading * Alfred R. Loeblich Jr, A. R. Loeblich and Helen Niña Tappan Loeblich, H. Tappan, 1964. Sarcodina Chiefly ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cassidulindae
The Cassidulinidae is a family of Paleocene to recent benthic foraminifera (amoieboid Protista, protists) that make up part of the rotaliid superfamily Cassidulinacea, characterized by calcareous test with biserially arranged chambers in a planispiral coil, at least in the early stage, but which later may uncoil. The Cassidulinidae includes three subfamilies, the Cassidulininae, Ehrenbergininae, and Orthoplectinae, which contain as many as fourteen (14) genera. References * Alfred R. Loeblich Jr, A.R. Loeblich and Helen Niña Tappan Loeblich, H. Tappan, 1964. Sarcodina Chiefly "Thecamoebians" and Foraminiferida; Treatise on Invertebrate Paleontology, Part C Protista 2. Geological Society of America and University of Kansas Press. * A. R. Loeblich & H.Tappan,198Forminiferal Genera and their Classification GSI E-book Foraminifera families {{foram-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |