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Nymphaster fontis
Taxonomy
Nymphaster fontis was named by Breton and Vizcaïno (1997). It is not extant. Its type specimen is Holotype MHNH 8942, paratypes MHNH 8943-8947. Its type locality is Middle Ilerdien, Fontcouverte, Aude, which is in a Ypresian offshore marl in the Marnes de Foncouverte Formation of France. It was considered monophyletic by Breton and Vizcaïno (1997).
Sister species lacking formal opinion data
Synonymy list
| Year | Name and author |
|---|---|
| 1997 | Nymphaster fontis Breton and Vizcaïno p. 19 figs. 4, pl. 1 fig. 6-9 |
| 2021 | Nymphaster fontis Jagt et al. 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.
†Nymphaster fontis Breton and Vizcaïno 1997
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Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| G. Breton and D. Vizcaïno 1997 | Interradial superomarginals very tall, highly domed abactinally. Face abradial slightly reentrant with fine granule pits. Granule pits larger, irregular on the abactinal dome. No spine. Inferomarginals of the disk weakly differentiated morphologically from the superomarginals. Marginals becoming progressively lower in arm. External face angular with abradial side vertical and adradial one horizontal. Sometime one or two spine bases on the angle. |