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Morphology | Ecology and taphonomy | External Literature Search | Age range and collections |
Leptognathina
Taxonomy
Leptognathina was named by Spencer and Wright (1966). It is extant.
It was assigned to Spinulosida by Spencer and Wright (1966) and Hess (1972).
It was assigned to Spinulosida by Spencer and Wright (1966) and Hess (1972).
Subtaxa
Synonymy list
Year | Name and author |
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1966 | Leptognathina Spencer and Wright p. U68 |
1972 | Leptognathina Hess p. 22 |
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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.
Subor. Leptognathina Spencer and Wright 1966
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Fm. Valvasteridae Viguier 1878
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Diagnosis
No diagnoses are available
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
Maximum range based only on fossils: Hettangian or 201.30000 to 199.30000 Ma
Minimum age of oldest fossil (stem group age): 199.3 Ma
Minimum age of oldest fossil (stem group age): 199.3 Ma
Collections: one only
Time interval | Ma | Country or state | Original ID and collection number |
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Hettangian | France | Diclidaster gevreyi (78715) |