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Hypodiadema
Taxonomy
Hypodiadema was named by Desor (1858) [Sepkoski's age data: J Plie-l K Vala].
It was assigned to Hemicidaridae by Clark and Twitchell (1915); to Pseudodiadematidae by Fell and Pawson (1966); and to Hemicidaroida by Sepkoski (2002).
It was assigned to Hemicidaridae by Clark and Twitchell (1915); to Pseudodiadematidae by Fell and Pawson (1966); and to Hemicidaroida by Sepkoski (2002).
Species
Synonymy list
| Year | Name and author |
|---|---|
| 1858 | Hypodiadema Desor p. 61 |
| 1915 | Hypodiadema Clark and Twitchell p. 52 |
| 1966 | Hypodiadema Fell and Pawson p. U387 |
| 2002 | Hypodiadema Sepkoski |
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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. †Hypodiadema Desor 1858
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†Hypodiadema balsami Stoppani 1865
†Hypodiadema elegans Clark and Twitchell 1915
Diagnosis
No diagnoses are available
Measurements
No measurements are available
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| Source: c = class, p = phylum | |||||
| References: Aberhan 1992, Kiessling 2004 | |||||
Age range: base of the Early/Lower Jurassic to the top of the Cretaceous or 201.40000 to 66.00000 Ma
Collections (5 total)
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Rhaetian | Italy | H. balsami (204938) | |
| Early/Lower Jurassic | Italy (Trento) | H. sp. (232110) | |
| Early/Lower Toarcian | Somalia | H. sp. (179136) | |
| Bathonian | Saudi Arabia | H. sp. (45519) | |
| Cretaceous | USA (Arkansas) | H. elegans (203427) |