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Rictaxis
Taxonomy
Rictaxis was named by Dall (1871) [Sepkoski's age data: K Sant-l R]. It is extant.
It was reranked as Actaeon (Rictaxis) by Dall (1896); it was reranked as Acteon (Rictaxis) by Oldroyd (1925) and Addicott (1970).
It was assigned to Actaeon by Dall (1896); to Acteon by Oldroyd (1925) and Addicott (1970); to Cephalaspida by Sepkoski (2002); and to Acteonidae by Olsson and Harbison (1953), Todd (2001) and Rosenberg (2005).
It was reranked as Actaeon (Rictaxis) by Dall (1896); it was reranked as Acteon (Rictaxis) by Oldroyd (1925) and Addicott (1970).
It was assigned to Actaeon by Dall (1896); to Acteon by Oldroyd (1925) and Addicott (1970); to Cephalaspida by Sepkoski (2002); and to Acteonidae by Olsson and Harbison (1953), Todd (2001) and Rosenberg (2005).
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. Rictaxis Dall 1871
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†Acteon (Rictaxis) weaveri Addicott 1970
†Rictaxis fusulus Dall 1896
†Rictaxis oryza Gabb 1872
Rictaxis punctocaelatus Carpenter 1864
Diagnosis
No diagnoses are available