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Heterocrinidae
Taxonomy
Heterocrinidae was named by Zittel (1879). It is the type family of Heterocrinacea.
It was assigned to Echinodermata by Ulrich (1925); to Heterocrinacea by Ubaghs et al. (1978); and to Disparida by Parsley (1981).
It was assigned to Echinodermata by Ulrich (1925); to Heterocrinacea by Ubaghs et al. (1978); and to Disparida by Parsley (1981).
Subtaxa
Synonymy list
| Year | Name and author |
|---|---|
| 1879 | Heterocrinidae Zittel |
| 1925 | Heterocrinidae Ulrich |
| 1978 | Heterocrinidae Ubaghs et al. p. T549 |
| 1981 | Heterocrinidae Parsley |
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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.
Fm. †Heterocrinidae Zittel 1879
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G. †Atyphocrinus Ulrich 1924
G. †Heterocrinus Hall 1872
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Subg. †Heterocrinus (Atyphocrinus) Ulrich 1925
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†Heterocrinus (Atyphocrinus) corryvillensis Ulrich 1925
†Heterocrinus canadensis Billings 1857
†Heterocrinus exiguus Meek 1872
†Heterocrinus exilis Hall 1866
†Heterocrinus juvenis Hall 1866
†Heterocrinus pentagonus Ulrich 1882
†Heterocrinus simplex Hall 1847
Diagnosis
No diagnoses are available
Measurements
No measurements are available
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| Source: subc = subclass, c = class, p = phylum | |||||
| References: Kiessling 2004, Aberhan et al. 2004, Aberhan 1992 | |||||
Age range: base of the Middle Ordovician to the top of the Maysvillian or 471.30000 to 449.60000 Ma
Collections (17 total)
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Middle Ordovician | USA (New York) | Heterocrinus sp. (334 335) | |
| Trentonian | Canada (Quebec) | Ectenocrinus canadensis (167617) | |
| Trentonian | Canada (Ontario) | Ectenocrinus canadensis (173364) | |
| Chatfieldian | USA (New York) | Heterocrinus sp. (337) | |
| Katian | Canada (Ontario) | Heterocrinus simplex (180117) | |
| Katian | Canada (Quebec) | Heterocrinus simplex (181082) Heterocrinus sp. (185487) | |
| Edenian | USA (Ohio) | Heterocrinus exiguus, Heterocrinus exilis (173357) Heterocrinus sp. (349 383 384 385 386) | |
| Maysvillian | USA (Ohio) | Heterocrinus juvenis (173358) Heterocrinus pentagonus (173054) | |
| Maysvillian - Ashgill | USA (Ohio) | Heterocrinus sp. (390) |