Sinotectirostrum

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Sinotectirostrum
Temporal range: Silurian–Carboniferous
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Scientific classification Red Pencil Icon.png
Kingdom: Animalia
Clade: Lophophorata
Phylum: Brachiopoda
Class: Rhynchonellata
Order: Rhynchonellida
Family: Trigonirhynchiidae
Subfamily: Trigonirhynchiinae
Genus:Sinotectirostrum
Sartenaer, 1961

Sinotectirostrum is a genus of brachiopods found in Paleozoic strata. [1] [2]

Brachiopod Phylum of marine animals also known as lamp shells

Brachiopods, phylum Brachiopoda, are a group of lophotrochozoan 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 groups are recognized, articulate and inarticulate. The word "articulate" is used to describe the tooth-and-groove features of the valve-hinge which is present in the articulate group, and absent from the inarticulate group. This is the leading diagnostic feature (fossilizable), by which the two main groups can be readily distinguished. Articulate brachiopods have toothed hinges and simple opening and closing muscles, while inarticulate brachiopods have untoothed hinges and a more complex system of muscles used to keep the two valves aligned. In a typical brachiopod a stalk-like pedicle projects from an opening in one of the valves near the hinges, known as the pedicle valve, keeping the animal anchored to the seabed but clear of silt that would obstruct the opening.

The PaleozoicEra is the earliest of three geologic eras of the Phanerozoic Eon. It is the longest of the Phanerozoic eras, lasting from 541 to 251.902 million years ago, and is subdivided into six geologic periods : the Cambrian, Ordovician, Silurian, Devonian, Carboniferous, and Permian. The Paleozoic comes after the Neoproterozoic Era of the Proterozoic Eon and is followed by the Mesozoic Era.

Cherkesova (2007) reassigns two taxa, "radiata" and "omaliusi", that Nalivkin had placed in Camarotoechia , to Sinotectirostrum as a new combination for a species and a subspecies respectively.

Camarotoechia is an extinct genus of brachiopods found in Paleozoic strata.

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References

  1. Potter, J. (1965). "Comparative sections through rocks of Ludlovian-Downtonian age in the Llandovery and Llandeilo districts". Proceedings of the Geologists' Association. 76 (4): 379–402. doi:10.1016/S0016-7878(65)80039-6.
  2. Cherkesova, S. V. (2007). "Revision of Camarotoechia radiata Nalivkin (Brachiopoda, Rhynchonellida) from the Famennian of Novaya Zemlya". Paleontological Journal. 41 (4): 407–414. doi:10.1134/S0031030107040065.