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Opalia (Nodiscala)
Taxonomy
Nodiscala was named by De Boury (1890) [Sepkoski's age data: T Eo R]. It is extant.
It was reranked as Opalia (Nodiscala) by Durham (1937) and Todd (2001); it was reranked as Scalina (Nodiscala) by Gardner (1947).
It was assigned to Scalina by Gardner (1947); to Opalia by Durham (1937) and Todd (2001); and to Neotaenioglossa by Sepkoski (2002).
It was reranked as Opalia (Nodiscala) by Durham (1937) and Todd (2001); it was reranked as Scalina (Nodiscala) by Gardner (1947).
It was assigned to Scalina by Gardner (1947); to Opalia by Durham (1937) and Todd (2001); and to Neotaenioglossa by Sepkoski (2002).
Species lacking formal opinion data
Synonyms
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Synonymy list
Year | Name and author |
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1890 | Nodiscala De Boury p. 12 |
1891 | Funiscala de Boury |
1937 | Opalia (Nodiscala) Durham p. 504 |
1947 | Scalina (Nodiscala) Gardner p. 578 |
1990 | Funiscala Beu et al. p. 411 |
1995 | Opalia (Funiscala) Pacaud and Le Renard |
2001 | Opalia (Nodiscala) Todd |
2002 | Funiscala Sepkoski |
2002 | Nodiscala Sepkoski |
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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.
Subg. Opalia (Nodiscala) De Boury 1890
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†Opalia (Nodiscala) obtusicostata Wood 1842
Opalia (Nodiscala) retiporosa Carpenter 1863
Invalid names: Funiscala de Boury 1891 [synonym]
Diagnosis
Reference | Diagnosis | |
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J. W. Durham 1937 | Shell small, slender, non-umbilicate; axial ribs nodose, ill-defined; occasional varices present representing resting stages, the last one very prominent; spiral ribs present, distinct; on last whorl there are two angulations, the lowest representing the keel bounding basal disk; interspaces between spiral ribs strongly punctate; aperture ovate, outer lip much thickened by terminal varix, inner lip moderately thick. Abundant in warm seas, usually in depths of less than 100 fathoms. |