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Advenaster
Taxonomy
Advenaster was named by Hess (1955) [Sepkoski's age data: J Bajo-u Sepkoski's reference number: 934]. Its type is Advenaster inermis.
It was assigned to Astropectininae by Spencer and Wright (1966); to Paxillosida by Sepkoski (2002); and to Astropectinidae by Hess (1955), Hess (1972) and Villier (2008).
It was assigned to Astropectininae by Spencer and Wright (1966); to Paxillosida by Sepkoski (2002); and to Astropectinidae by Hess (1955), Hess (1972) and Villier (2008).
Species
A. inermis (type species)
Synonymy list
| Year | Name and author |
|---|---|
| 1955 | Advenaster Hess pp. 23-24 |
| 1966 | Advenaster Spencer and Wright p. U45 |
| 1972 | Advenaster Hess p. 7 |
| 2002 | Advenaster Sepkoski |
| 2008 | Advenaster Villier p. 150 |
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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.
Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| H. Hess 1955 | The lateral faces for articulation with the adjoining plates develop on the entire lateral faces of the marginals. Marginal plates with ornament of tiny rounded tubercles, bearing short acicular spines. Actinolateral plates large, one row extending far into the arm (2/3 of arm length). Abactinal plates compact, rounded. |
Measurements
No measurements are available
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| Source: f = family, c = class, p = phylum | |||||
| References: Aberhan et al. 2004, Aberhan 1992, Blake 1990 | |||||
Age range: base of the Bathonian to the top of the Late/Upper Callovian or 168.30000 to 161.20000 Ma
Collections (3 total)
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Late/Upper Bajocian | Switzerland | A. inermis (32036) | |
| Bathonian | India | A. sp. (96836) | |
| Late/Upper Callovian | Poland | A. sp. (63064) |