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Palaeostraba
Taxonomy
Palaeostraba was named by Liljedahl (1984) [Sepkoski's age data: S Wenl-u Sepkoski's reference number: 1117].
It was assigned to Malletiidae by Liljedahl (1994); and to Nuculoida by Sepkoski (2002).
It was assigned to Malletiidae by Liljedahl (1994); and to Nuculoida by Sepkoski (2002).
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. †Palaeostraba Liljedahl 1984
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Diagnosis
Reference | Diagnosis | |
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L. Liljedahl 1994 | Malletiid with slightly elongated posterior end, beaks slightly prosogyrate ( Fig. 34N, O ) , opisthodetic exter nal ligament and possibly also an additional intemal part of the ligament (Fig. 34P); distinct anterior intemal septum and less conspicuous posterior septum (Fig. 34L); central tooth and socket extremely small, as are adjoining anterior and posterior teeth (Fig. 34P); oblique extemal sulcus from pos tero-umbonal slope to postero-ventral margin (Fig. 340). |