| Basic info | Taxonomic history | Classification | Included Taxa |
| Morphology | Ecology and taphonomy | External Literature Search | Age range and collections |
Stenaster
Taxonomy
Stenaster was named by Billings (1858) [Sepkoski's age data: O Cara-l O Ashg-m Sepkoski's reference number: 1066]. It is the type genus of Stenasteridae. It was considered monophyletic by Dean Shackleton (2005).
It was reranked as Urasterella (Stenaster) by Hall (1868).
It was assigned to Urasterella by Hall (1868); to Stenurida by Sepkoski (2002); to Ophiuroidea by Blake (2013); and to Stenasteridae by Schuchert (1914), Schuchert (1915), Spencer (1927), Spencer (1951), Owen (1965), Spencer and Wright (1966), Dean Shackleton (2005), Blake et al. (2016).
It was reranked as Urasterella (Stenaster) by Hall (1868).
It was assigned to Urasterella by Hall (1868); to Stenurida by Sepkoski (2002); to Ophiuroidea by Blake (2013); and to Stenasteridae by Schuchert (1914), Schuchert (1915), Spencer (1927), Spencer (1951), Owen (1965), Spencer and Wright (1966), Dean Shackleton (2005), Blake et al. (2016).
Synonyms
|
Synonymy list
| Year | Name and author |
|---|---|
| 1858 | Stenaster Billings p. 77 |
| 1868 | Urasterella (Stenaster) Hall |
| 1880 | Tetraster Nicholson and Etheridge |
| 1914 | Stenaster Schuchert |
| 1915 | Stenaster Schuchert pp. 163-165 |
| 1915 | Tetraster Schuchert pp. 167-169 figs. pl. 33 fig. 4 |
| 1927 | Stenaster Spencer pp. 344-356 |
| 1951 | Stenaster Spencer p. 111 |
| 1965 | Stenaster Owen p. 545 |
| 1966 | Stenaster Spencer and Wright p. U82 |
| 2002 | Stenaster Sepkoski |
| 2005 | Stenaster Dean Shackleton p. 80 |
| 2013 | Stenaster Blake p. 369 |
| 2016 | Stenaster Blake et al. p. 176 |
Is something missing? Join the Paleobiology Database and enter the data
|
|
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. †Stenaster Billings 1858
show all | hide all
†Stenaster confluens Trautschold 1879
†Stenaster obtusus Forbes 1848
hide
Invalid names: Hudsonaster batheri Schuchert 1915 [synonym], Stenaster salteri Billings 1858 [synonym], Tetraster wyvillethomsoni Nicholson and Etheridge 1880 [synonym]
Invalid names: Tetraster Nicholson and Etheridge 1880 [synonym]
Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| J. Dean Shackleton 2005 | Ambulacrals in direct opposition; ambulacrals rectangular in shape; straight perradial suture; longitudinally oriented lateral groove running down interradial surface of arm; distinct large rounded tubercles on aboral surface of adambulacrals; loss of disc granulation; aboral plates of identical size and morphology. |
Measurements
No measurements are available
|
|
||||
|
|
||||
|
|||||
|
|
||||
|
|||||
|
|
||||
|
|
||||
| Source: g = genus, c = class, p = phylum | |||||
| References: Aberhan et al. 2004, Aberhan 1992, Spencer and Wright 1966 | |||||
Collections (5 total)
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Floian | USA (Utah) | S. obtusus (216850) | |
| Sandbian | Norway | S. obtusus (94435) | |
| Turinian | USA (Kentucky) | S. obtusus (100128) | |
| Katian | Canada (Ontario) | S. sp. (228229) | |
| Telychian | Australia (Tasmania) | S. obtusus (40017) |