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Echinasteridae
Taxonomy
Echinasteridae was named by Verrill (1870). It is extant. Its type is Echinaster. It was considered monophyletic by Gale (1987) and Mah and Blake (2012).
It was assigned to Leptognathina by Spencer and Wright (1966); to Valvatida by Gale (1987); and to Spinulosida by Perrier (1884), Blake (1989) and Mah and Blake (2012).
It was assigned to Leptognathina by Spencer and Wright (1966); to Valvatida by Gale (1987); and to Spinulosida by Perrier (1884), Blake (1989) and Mah and Blake (2012).
Subtaxa
Echinaster (syn. Rhopia) (type genus), Henricia
Synonymy list
Year | Name and author |
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1870 | Echinasteridae Verrill p. 343 |
1884 | Echinasteridae Perrier p. 164 |
1966 | Echinasteridae Spencer and Wright p. U70 |
1987 | Echinasteridae Gale p. 125 |
1989 | Echinasteridae Blake p. 213 |
2012 | Echinasteridae Mah and Blake p. 3 |
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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.
Fm. Echinasteridae Verrill 1870
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G. Echinaster Müller and Troschel 1840
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†Echinaster jacobseni Rasmussen 1972
Invalid names: Rhopia Gray 1840 [objective synonym]
Diagnosis
No diagnoses are available
Measurements
No measurements are available
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Source: f = family, o = order, c = class, p = phylum | |||||
References: Aberhan 1992, Aberhan et al. 2004, Blake 1990 |
Age range
Maximum range based only on fossils: base of the Early/Lower Maastrichtian to the top of the Late/Upper Maastrichtian or 70.60000 to 66.00000 Ma
Minimum age of oldest fossil (stem group age): 66.0 Ma
Minimum age of oldest fossil (stem group age): 66.0 Ma
Collections (2 total)
Time interval | Ma | Country or state | Original ID and collection number |
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Maastrichtian - Late/Upper Maastrichtian | Brazil (Paraíba) | Henricia parahybensis (88070) | |
Early/Lower Maastrichtian | Germany (Mecklenburg-Vorpommern) | Echinasteridae indet. (32022) |