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Denebia
Taxonomy
Denebia was named by Blake and Reid (1998) [Sepkoski's age data: K Albi-m Sepkoski's reference number: 1265]. It is not extant.
It was assigned to Valvatida by Sepkoski (2002); and to Ophidiasteridae by Blake and Reid (1998) and Gale (2011).
It was assigned to Valvatida by Sepkoski (2002); and to Ophidiasteridae by Blake and Reid (1998) and Gale (2011).
Species
Synonymy list
| Year | Name and author |
|---|---|
| 1998 | Denebia Blake and Reid p. 519 |
| 2002 | Denebia Sepkoski |
| 2011 | Denebia Gale p. 59 |
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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 | |
|---|---|---|
| D. B. Blake and R. Reid 1998 | Differentiated by ossicles of primary series in well-defined longitudinal rows; ossicular sizes regularly gradational with no scattered enlarged primary ossicles. Adambulacral furrow spines elongate, granular covering layer lacking. Interbrachial marginals not slightly enlarged; enlarged marginal granule depressions present; intermarginal series present but not disrupting alignment of marginals. Ophidiasterid close to those of Ferdinia-group sensu Marsh and Campbell (1991). Arms, disk are somewhat flattened (rather than columnar), a shape suggestive of that of goniasterids. Arm tips, marginal, abactinal series clearly differentiated. Carinal row well-defined, nearly continuous except some smaller ossicles intercalated; one lateral row on each side of carinal series. Marginals larger than abactinals, actinals; marginal rows without intercalated small ossicles; inferomarginals larger proximally but ossicles of two series becoming approximately equal in size distally. Well-defined intermarginal series present proximally. Ventral interbrachial area large, with multiple ossicular rows. Furrow spines columnar, elongate, attenuated, six to height in palmate arrangement on each ossicle; subambulacral spines about three, larger than those of furrow series, flattened; covering granular layer lacking. |
Measurements
No measurements are available
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| Source: f = family, c = class, p = phylum | |||||
| References: Blake 1990, Aberhan et al. 2004, Aberhan 1992 | |||||
Age range: Late/Upper Albian or 105.30000 to 99.60000 Ma
Collections (6 total)
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Late/Upper Albian | USA (Texas) | D. americana (59871 59874 59875 59876 59878 59879) |