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Hemicosmitoida
Taxonomy
Hemicosmitida was named by Jaekel (1918). Its type is Hemicosmitidae.
It was corrected as Hemicosmitoida by Paul et al. (2019).
It was assigned to Rhombifera by Beaver et al. (1967); and to Rhombifera by Regnéll (1945) and Paul et al. (2019).
It was corrected as Hemicosmitoida by Paul et al. (2019).
It was assigned to Rhombifera by Beaver et al. (1967); and to Rhombifera by Regnéll (1945) and Paul et al. (2019).
Subtaxa
Synonymy list
| Year | Name and author |
|---|---|
| 1918 | Hemicosmitida Jaekel |
| 1945 | Hemicosmitida Regnéll |
| 1967 | Hemicosmitida Beaver et al. p. S217 |
| 2019 | Hemicosmitoida Paul et al. |
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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.
Superfm. †Hemicosmitoida Jaekel 1918
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Fm. †Caryocrinitidae Bassler 1938
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G. †Caryocrinites Say 1825
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†Caryocrinites cryptoporus Paul 1984
†Caryocrinites ornatus Say 1825
†Caryocrinites rugatus Forbes 1848
†Caryocrinites septentrionalis Regnell 1945
G. †Juglandocrinus von Koenen 1886
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†Juglandocrinus crassus von Koenen 1886
†Juglandocrinus elongatus Jaekel 1899
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Invalid names: Juglandocrinus vulgaris Dreyfus 1939 [synonym]
†Juglandocrinus europaeus Quenstedt 1874
†Juglandocrinus sdzuyi Chauvel and Le Menn 1979
†Juglandocrinus turbo Bather 1906
Invalid names: Oocystis Dreyfus 1939 [synonym]
G. †Ptychocosmites
G. †Stribalocystites
Fm. †Hemicosmitidae Jaekel 1918
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G. †Corylocrinus
G. †Hemicosmites Buch 1840
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†Hemicosmites extraneus Eichwald 1840
†Hemicosmites grandis Jaeckel 1899
†Hemicosmites oelandicus Regnell 1945
†Hemicosmites papaveris Bockelie 1979
†Hemicosmites pyriformis Buch 1840
†Hemicosmites sculptus Bockelie 1979
†Hemicosmites sphaericus Bockelie 1979
†Hemicosmites variabilis Bockelie 1979
Invalid names: Hexalacystis Haeckel 1896 [synonym]
G. †Tricosmites
Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| C. R. C. Paul et al. 2019 | A dichoporite superfamily with well developed heteromorphic stem; theca composed of three or four basals, six infra-laterals, eight or nine laterals all of which bear cryptorhombs, and additional plates in the oral region; with three or four primary ambulacra (after Lanc, McDermott & Paul, 2015, p. 4). |