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Retroceramus
Taxonomy
Retroceramus was named by Koschelkina (1958) [Sepkoski's age data: J Aale K Berr-l Sepkoski's reference number: 92,93].
It was assigned to Inoceramidae by Vokes (1980); and to Pterioida by Sepkoski (2002).
It was assigned to Inoceramidae by Vokes (1980); and to Pterioida by Sepkoski (2002).
Species
Species lacking formal opinion data
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. †Retroceramus Koschelkina 1958
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Subg. †Retroceramus (Fractoceramus)
†Retroceramus clinatus Koschelkina 1969
†Retroceramus elegans Koschelkina 1962
†Retroceramus haasti Hochstetter 1863
†Retroceramus jurensis Koschelkina 1969
†Retroceramus menneri Koschelkina 1960
†Retroceramus obliquus Morris and Lycett 1853
†Retroceramus originalis Koschelkina 1985
†Retroceramus popovi Koschelkina 1962
†Retroceramus priscus Sey 1972
†Retroceramus provincialis Koschelkina 1969
†Retroceramus solidus Koschelkina 1969
†Retroceramus subtilis Sey 1972
†Retroceramus xiaoshuiensis Chen 1982
Diagnosis
No diagnoses are available