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Cibecuia
Taxonomy
Cibecuia was named by Winters (1956) [Sepkoski's age data: P Leon Sepkoski's reference number: 797]. Its type is Cibecuia cedarensis.
It was assigned to Murchisoniidae by Knight et al. (1960); to Orthonemidae by Mazaev (2002); and to Archaeogastropoda by Sepkoski (2002).
It was assigned to Murchisoniidae by Knight et al. (1960); to Orthonemidae by Mazaev (2002); and to Archaeogastropoda by Sepkoski (2002).
Species
Synonymy list
| Year | Name and author |
|---|---|
| 1956 | Cibecuia Winters |
| 1960 | Cibecuia Knight et al. p. 293 |
| 2002 | Cibecuia Mazaev p. 94 |
| 2002 | Cibecuia 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.
G. †Cibecuia Winters 1956
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†Cibecuia cedarensis Winters 1956
†Cibecuia divarica Batten 1985
†Cibecuia gouldii Beede 1907
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Invalid names: Murchisonia collingsworthensis Beede 1907 [synonym], Orthonema texana Beede 1907 [synonym]
†Cibecuia magnum Mazaev 2002
†Cibecuia sinelnikovae Mazaev 2002
Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| A. V. Mazaev 2002 | High-spired shell, consists of numerous drum-like whorls, anomphalous. Protoconch of one smooth whorl. Whorl face of adult whorls straight or concave in profile, nearly parallel to shell axis or slightly inclined to it. Suture fine, distinct. Basal angulation well developed, distinctly separating face and base of whorls. Whorl face smooth, ornamented with lira or row of nodes below suture, which may form very small shoulder with narrow subsutural ramp. Selenizone flattened, bordered by two fine striae, placed just above mid-whorl face. Whorl base moderately rounded, smooth or ornamented with spiral lirae. Growth lines distinct, fine, sometimes rough, prosocyrt and extended prosoclinally above selenizone, forming lunulae on selenizone, and slightly prosocyrt and extended opisthoclinally below selenizone. |