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Hydrocenoidea
Taxonomy
Hydrocenoidea was named by Troschel (1857). It is extant. Its type is Hydrocena.
It was assigned to Cycloneritimorpha by Bouchet et al. (2005); and to Cycloneritida by Yu and Neubauer (2021).
It was assigned to Cycloneritimorpha by Bouchet et al. (2005); and to Cycloneritida by Yu and Neubauer (2021).
Subtaxa
Synonymy list
Year | Name and author |
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1857 | Hydrocenoidea Troschel |
2005 | Hydrocenoidea Bouchet et al. p. 246 |
2021 | Hydrocenoidea Yu and Neubauer p. 2 |
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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. Hydrocenoidea Troschel 1857
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Fm. Hydrocenidae Troschel 1856
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G. Georissa Blanford 1864
G. Hydrocena Küster 1844
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Subg. †Hydrocena (Hydrocena) Küster 1844
†Hydrocena praecursor Yu and Neubauer 2021
†Hydrocena trolli Schlickum 1979
Invalid names: Georissinae Blanford 1864 [invalid subgroup]
Diagnosis
No diagnoses are available
Measurements
No measurements are available
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Reference: Kiessling 2004 |
Age range
Maximum range based only on fossils: base of the Early/Lower Cenomanian to the top of the Messinian or 100.50000 to 5.33300 Ma
Minimum age of oldest fossil (stem group age): 93.9 Ma
Minimum age of oldest fossil (stem group age): 93.9 Ma
Collections (6 total)
Time interval | Ma | Country or state | Original ID and collection number |
---|---|---|---|
Early/Lower Cenomanian | Myanmar | Hydrocena praecursor (161726) | |
MN 6 | Poland | Hydrocena trolli (231087) Pseudamnicola helicella (231086) | |
Messinian | Italy | Hydrocena moncuccoensis (172917) | |
Messinian | Italy (Piedmont) | Hydrocena moncuccoensis (172910 199859) |