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Acrocyathus
Taxonomy
Acrocyathus was named by d'Orbigny (1849) [Sepkoski's age data: C Vise-l C Vise-u]. It is not extant. Its type is Acrocyathus floriformis.
It was assigned to Acrocyathinae by Hill (1981); to Acrocyathidae by Sando (1983); and to Rugosa by Sepkoski (2002).
It was assigned to Acrocyathinae by Hill (1981); to Acrocyathidae by Sando (1983); and to Rugosa by Sepkoski (2002).
Species
A. cystosus, A. floriformis (type species), A. girtyi, A. grechovkae, A. hsujiulingi, A. lissitzini, A. pennsylvanicus, A. pilatus, A. proliferus, A. rotai, A. shimeri, A. unicus, A. utkae, A. zhizhinae
Entered
by J. Sepkoski on 2003-01-23; modified by J. Marcot on 2021-06-09
Synonymy list
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If no rank is listed, the taxon is considered an unranked clade in modern classifications. Ranks may be repeated or presented in the wrong order because authors working on different parts of the classification may disagree about how to rank taxa.
G. †Acrocyathus d'Orbigny 1849
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†Acrocyathus cystosus Zhizhina in Bul'vanker and others 1960
†Acrocyathus floriformis floriformis d'Orbigny 1849
†Acrocyathus girtyi Hayasaka 1936
†Acrocyathus grechovkae Degtyarev 1973
†Acrocyathus hsujiulingi Yoh 1961
†Acrocyathus lissitzini Zhizhina in Bul'vanker and others 1960
†Acrocyathus pennsylvanicus Shimer 1926
†Acrocyathus pilatus Sando 1983
†Acrocyathus proliferus Hall in Hall and Whitney 1858
†Acrocyathus rotai Zhizhina in Bul'vanker and others 1960
†Acrocyathus shimeri Crickmay 1955
†Acrocyathus unicus Yabe and Hayasaka 1915
†Acrocyathus utkae Degtyarev 1973
†Acrocyathus zhizhinae Vasilyuk 1960
Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| W. J. Sando 1983 | Ordinarily cerioid colonial corals with . tabular to hemispherical growth form; one fasciculate species is known and cerioid-fasciculate coralla are rare. Septa of two orders. Major septa thin, seldom extending across tabularium to columella and ordinarily discon-tinuous or absent in dissepimentarium. Cardinal septum short and situated in a fossula formed by downwarped tabulae in some species. Counter septum commonly long and extending to columella. Minor septa ordinarily ab-sent or poorly developed. Columella ranging from a sim-ple axial plate joined to counter septum to a complex spiderweb structure made up of an axial plate, septal lamellae, and axial tabellae or upturned edges of tabulae. Tabulae ordinarily complete, conical, without well-defined shoulders, but may be nearly horizontal in some species. Peripheral tabellae rare. Dissepimentarium lonsdaleoid, commonly showing traces or crests of discontinuous septa in transverse section. Increase peripheral. |
Measurements
No measurements are available
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| Source: o = order, c = class | |||||
| Reference: Kiessling 2004 | |||||
Age range: base of the Brigantian to the top of the Meramecian or 335.90000 to 335.40000 Ma
Collections (9 total)
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Carboniferous | USA (Georgia) | Lithostrotion proliferum (164685) | |
| Meramecian | USA (Nevada) | A. sp. (6294 6300 6322) | |
| Meramecian | USA (Alabama) | A. proliferus (241998) | |
| Meramecian | Canada (Alberta) | Lithostrotionella pennsylvanica (62575 62582) | |
| Brigantian | United Kingdom (England) | Lithostrotion proliferum (73391 73424) |