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Douvillinidae
Douvillinidae is an extinct family of prehistoric brachiopods in the extinct superfamily Strophomenoidea Strophomenoidea is an extinct superfamily of prehistoric brachiopods in the order Strophomenida. Families - after * Amphistrophiidae * Christianiidae * Douvillinidae Douvillinidae is an extinct family of prehistoric brachiopods in the .... The type genus is '' Douvillina''. References External links Douvillinidaeat fossilworks.org Prehistoric protostome families Brachiopod families Strophomenida Ordovician first appearances {{brachiopod-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Protodouvillininae
Protodouvillininae is an extinct subfamily of prehistoric brachiopods in the extinct family Douvillinidae. The type genus is '' Protodouvillina''. Genera * '' Bojodouvillina'' * '' Contradouvillina'' * '' Cymostrophia'' * '' Douvillinella'' * '' Hercostrophia'' * '' Malurostrophia'' * '' Megastrophiella'' * '' Moravostrophia'' * '' Nadiastrophia'' * '' Paucistrophia'' * '' Phragmostrophia'' * '' Protodouvillina'' * '' Radiomena'' * '' Taemostrophia'' * '' Teichostrophia'' * '' Telaeoshaleria'' References External links Protodouvillininaeat fossilworks.org Paleozoic brachiopods Prehistoric animal subfamilies Strophomenida {{paleo-protostome-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Strophomenoidea
Strophomenoidea is an extinct superfamily of prehistoric brachiopods in the order Strophomenida. Families - after * Amphistrophiidae * Christianiidae * Douvillinidae Douvillinidae is an extinct family of prehistoric brachiopods in the extinct superfamily Strophomenoidea Strophomenoidea is an extinct superfamily of prehistoric brachiopods in the order Strophomenida Strophomenida is an extinct order of a ... * Eopholidostrophiidae * Glyptomenidae * Leptaenoideidae * Leptostrophiidae * Rafinesquinidae * Shaleriidae * Strophodontidae * Strophomenidae * Strophonellidae References External links * Prehistoric animal superfamilies Strophomenida {{paleo-protostome-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Prehistoric Protostome Families
Prehistory, also known as pre-literary history, is the period of human history between the use of the first stone tools by hominins 3.3 million years ago and the beginning of recorded history with the invention of writing systems. The use of symbols, marks, and images appears very early among humans, but the earliest known writing systems appeared 5000 years ago. It took thousands of years for writing systems to be widely adopted, with writing spreading to almost all cultures by the 19th century. The end of prehistory therefore came at very different times in different places, and the term is less often used in discussing societies where prehistory ended relatively recently. In the early Bronze Age, Sumer in Mesopotamia, the Indus Valley Civilisation, and ancient Egypt were the first civilizations to develop their own scripts and to keep historical records, with their neighbors following. Most other civilizations reached the end of prehistory during the following Iron Age. T ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Brachiopod Families
Brachiopods (), phylum Brachiopoda, are a phylum of trochozoan animals that have hard "valves" (shells) on the upper and lower surfaces, unlike the left and right arrangement in bivalve molluscs. Brachiopod valves are hinged at the rear end, while the front can be opened for feeding or closed for protection. Two major categories are traditionally recognized, articulate and inarticulate brachiopods. The word "articulate" is used to describe the tooth-and-groove structures of the valve-hinge which is present in the articulate group, and absent from the inarticulate group. This is the leading diagnostic skeletal feature, by which the two main groups can be readily distinguished as fossils. Articulate brachiopods have toothed hinges and simple, vertically-oriented opening and closing muscles. Conversely, inarticulate brachiopods have weak, untoothed hinges and a more complex system of vertical and oblique (diagonal) muscles used to keep the two valves aligned. In many brachiopods, a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Strophomenida
Strophomenida is an extinct order of articulate brachiopods which lived from the lower Ordovician period to the mid Carboniferous period. Strophomenida is part of the extinct class Strophomenata, and was the largest known order of brachiopods, encompassing over 400 genera. Some of the largest and heaviest known brachiopod species belong to this class. Strophomenids were among the most diverse and abundant brachiopods during the Ordovician, but their diversity was strongly impacted at the Late Ordovician mass extinction. Survivors rediversified into new morphologies in the Silurian, only to be impacted once again at the Late Devonian mass extinction. However, they still survived till the mid Carboniferous. Adult strophomenids lack an opening for the pedicle (stalk), so in life, they either lay free or cemented the ventral valve (lower shell) onto a firm substrate at the umbo (hinge). In juveniles, a tiny hole for the pedicle was present on the ventral valve near the umbo, but ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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