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Mesotremaster
Taxonomy
Mesotremaster was named by Hess (1972) [Sepkoski's age data: J Bajo-u J Oxfo-m]. It is not extant. It was considered monophyletic by Hess (1972) and Gale (2018).
It was assigned to Tremasterinae by Hess (1972); to Asteroidea by Sepkoski (2002); to Asterinidae by Gale (2011); and to Tremasteridae by Gale (2018).
It was assigned to Tremasterinae by Hess (1972); to Asteroidea by Sepkoski (2002); to Asterinidae by Gale (2011); and to Tremasteridae by Gale (2018).
Species
Synonymy list
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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. †Mesotremaster Hess 1972
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†Mesotremaster felli Hess 1972
†Mesotremaster mazetieri Mercier 1935
†Mesotremaster zbindeni Hess 1981
Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| H Hess 1972 | Body pentagonal, without interradial angle. Ambulacral plates compressed. Ambulacral pores organized in four rows. Papular pores reduced to very small openings between the abactinal plates. |
Measurements
No measurements are available
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| Source: o = order, c = class, p = phylum | |||||
| References: Blake 1990, Aberhan et al. 2004, Aberhan 1992 | |||||
Age range: base of the Late/Upper Bajocian to the top of the Late/Upper Bathonian or 171.60000 to 164.70000 Ma
Collections (2 total)
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Late/Upper Bajocian | Switzerland | M. felli (32036) | |
| Late/Upper Bathonian | France | Stauraster mazetieri (72284) |