Xystostrophia umbraculum (Middle Devonian of Poland, family Chilidiopsidae). Looking onto the brachial (dorsal) valve; the broad interarea of the ventral valve overhangs the hinge of the shell.
Scientific classification
Domain:
Eukaryota
Kingdom:
Animalia
Phylum:
Brachiopoda
Class:
†Strophomenata
Order:
†Orthotetida Waagen, 1884
Suborders
Orthotetidina
Triplesiidina
The orthotetides (Orthotetida) are an extinct order of brachiopods in the class Strophomenata. Though not particularly diverse or abundant relative to strophomenides (Strophomenida) or productides (Productida), orthotetides were nevertheless the longest-lasting order of strophomenates, surviving from the Middle Ordovician (“Llanvirn”) up until the Late Permian. Externally, many orthotetides are difficult to distinguish from strophomenides. Most fundamental differences between the two orders are internal: orthotetides have more elaborate cardinal processes and a greater diversity of shell microstructure.[1]
^Williams, Alwyn; Brunton, C.H.C.; Carlson, S.J.; et al. (1997–2007). Kaesler, Roger L.; Selden, Paul (eds.). Part H, Brachiopoda (Revised). Treatise on Invertebrate Paleontology. Boulder, Colorado; Lawrence, Kansas: Geological Society of America; University of Kansas.
The orthotetides (Orthotetida) are an extinct order of brachiopods in the class Strophomenata. Though not particularly diverse or abundant relative to...
Order †Billingsellida Order †Strophomenida Order †Productida Order †Orthotetida Class Rhynchonellata Order Rhynchonellida Order Terebratulida Order Thecideida...
Katzenelnbogen Formation Seifen Formation Belgium Germany A member of Orthotetida belonging to the family Areostrophiidae. The type species is "Orthothethes"...
Simon Carboniferous (Viséan) Meenymore Formation Ireland A member of Orthotetida belonging to the family Schuchertellidae. Duartea latoresensis Sp. nov...
Simon Carboniferous (Tournaisian) Tournai Formation Belgium A member of Orthotetida belonging to the family Schuchertellidae. Simehorthis Gen. et sp. nov...
Anopliidae. Imbriea Nom. nov Valid Reily Devonian United States A member of Orthotetida belonging to the family Areostrophiidae; a replacement name for Orthopleura...
flexa Sp. nov Valid Rong et al. Silurian (Rhuddanian) China A member of Orthotetida belonging to the family Chilidiopsidae. Gemmarcula buerai Sp. nov Valid...
S2CID 237378374. Rezende, J.M.P.; Isaacson, P.E. (2021). "Schellwienella clarkei (Orthotetida, Brachiopoda): a new species from the Devonian of the Paraná Basin, Brazil"...
from the Zhongzhai section (South China), Part 2: Lingulida, Orthida, Orthotetida and Spiriferida". Alcheringa: An Australasian Journal of Palaeontology...
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