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Stuertzaster
Taxonomy
Sturtzaster was named by Etheridge (1899). Its type is Palaeocoma marstoni. It was considered monophyletic by Dean Shackleton (2005).
It was corrected as Stuertzaster by Spencer (1951), Spencer and Wright (1966), Boczarowski (2001), Sepkoski (2002), Dean Shackleton (2005) and Blake (2013).
It was assigned to Lapworthuridae by Schuchert (1915); to Asterozoa by Spencer (1940); to Pradesuridae by Spencer (1951), Owen (1965), Spencer and Wright (1966) and Boczarowski (2001); to Stenurida by Sepkoski (2002); to Rhopalocomidae by Dean Shackleton (2005); and to Stenuroidea by Blake (2013).
It was corrected as Stuertzaster by Spencer (1951), Spencer and Wright (1966), Boczarowski (2001), Sepkoski (2002), Dean Shackleton (2005) and Blake (2013).
It was assigned to Lapworthuridae by Schuchert (1915); to Asterozoa by Spencer (1940); to Pradesuridae by Spencer (1951), Owen (1965), Spencer and Wright (1966) and Boczarowski (2001); to Stenurida by Sepkoski (2002); to Rhopalocomidae by Dean Shackleton (2005); and to Stenuroidea by Blake (2013).
Synonymy list
Year | Name and author |
---|---|
1899 | Sturtzaster Etheridge p. 128 |
1915 | Sturtzaster Schuchert pp. 252-253 |
1940 | Sturtzaster Spencer pp. 513-517 |
1951 | Stuertzaster Spencer p. 111 |
1965 | Sturtzaster Owen p. 547 |
1966 | Stuertzaster Spencer and Wright p. U80 |
2001 | Stuertzaster Boczarowski p. 8 |
2002 | Stuertzaster Sepkoski |
2005 | Stuertzaster Dean Shackleton p. 74 |
2013 | Stuertzaster Blake p. 367 |
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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. †Stuertzaster Etheridge 1899
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†Stuertzaster liquidus Boczarowski 2001
†Stuertzaster marstoni Salter 1857
†Stuertzaster utroquecognitus Boczarowski 2001
†Sturtzaster colvini Salter 1857
†Sturtzaster cygnipes Salter 1857
†Sturtzaster mitchelli Etheridge 1899
†Sturtzaster spinosissimus Roemer 1864
Diagnosis
Reference | Diagnosis | |
---|---|---|
A. Boczarowski 2001 | Aboral side of central disc is highly swollen, encrusted by network with radiate spicules. Arms short and wide, ambulacrals with thin, big groove. Laterals with wide, strong juncture. Very long, thin spines consist of three blades. | |
J. Dean Shackleton 2005 | Loss of inferomarginals; loss of inferomarginal spines; loss of buccal slits. |
Measurements
No measurements are available
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Source: subp = subphylum, p = phylum | |||||
References: Aberhan 1992, Bambach et al. 2007 |
Collections (6 total)
Time interval | Ma | Country or state | Original ID and collection number |
---|---|---|---|
Wenlock | Australia (Victoria) | S. sp. (494) | |
Leintwardine | United Kingdom | S. colvini, S. marstoni (95143) | |
Early/Lower Emsian | Germany | Erinaceaster spinosissimus (26904) | |
Emsian | Poland (Kielecki) | S. utroquecognitus (94469) | |
Eifelian | Poland (Swietokrzyskie) | S. liquidus (94509) | |
Late/Upper Givetian | Poland | S. utroquecognitus (82667) |