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Hemiaster (Trachyaster)
Taxonomy
Trachyaster was named by Pomel (1869).
It was reranked as Hemiaster (Trachyaster) by Fischer (1966), Kier (1984).
It was assigned to Spatangoida by Pomel (1883); and to Hemiaster by Fischer (1966), Kier (1984).
It was reranked as Hemiaster (Trachyaster) by Fischer (1966), Kier (1984).
It was assigned to Spatangoida by Pomel (1883); and to Hemiaster by Fischer (1966), Kier (1984).
Subtaxa
Species lacking formal opinion data
Hemiaster aquisgranensis, Hemiaster arnaudi, Hemiaster blanckenhorni, Hemiaster branderi, Hemiaster breviusculus, Hemiaster calvani, Hemiaster canaliferus, Hemiaster cenomanensis, Hemiaster chargensis, Hemiaster cubicus, Hemiaster cubicus, Hemiaster desmoulinsi, Hemiaster elongatus, Hemiaster faurai, Hemiaster frontacutus, Hemiaster gabrielis, Hemiaster gabrielis, Hemiaster grossouvrei, Hemiaster heberti, Hemiaster heberti, Hemiaster heberti, Hemiaster konickanus, Hemiaster koninckanus, Hemiaster kummeli, Hemiaster ligerensis, Hemiaster longuiformis, Hemiaster lovisatoi, Hemiaster maestrichtensis, Hemiaster medjesensis, Hemiaster minimus, Hemiaster moulinsanus, Hemiaster nasutulus, Hemiaster newtoni, Hemiaster newtoni, Hemiaster nucleus, Hemiaster phrynus, Hemiaster ricordeaui, Hemiaster similis, Hemiaster solignaci, Hemiaster steinmanni, Hemiaster ungulata, Hemiaster uwajimensis, Hemiaster vomer, Hemiaster weatherbyi, Hemiaster whitei, Trachyaster cotteaui
Synonyms
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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.
Subg. †Hemiaster (Trachyaster) Pomel 1869
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†Hemiaster (Trachyaster) decipiens Duncan and Sladen 1883
†Hemiaster (Trachyaster) herrarae Lambert and Sanchez Roig 1926
Invalid names: Hemiaster (Trachyaster) minutus Sanchez Roig 1949 [nomen nudum]
Diagnosis
No diagnoses are available
Measurements
No measurements are available
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| Source: o = order, c = class, p = phylum | |||||
| References: Aberhan 1992, Kiessling 2004 | |||||
Age range: base of the Lutetian to the top of the Burdigalian or 48.07000 to 15.98000 Ma
Collections (2 total)
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Lutetian | Qatar | Hemiaster decipiens (209101) | |
| Burdigalian | Egypt | Trachyaster cotteaui (47996) |