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Cucullaea (Idonearca) buttensis
Taxonomy
Cucullaea (Idonearca) buttensis was named by Anderson (1958). It is a 3D body fossil. Its type locality is UCLA loc. 3648, Fossil Bluff, West side of Chico Creek, which is in a Campanian coastal sandstone in the Chico Formation of California.
Sister species lacking formal opinion data
Arca gabrielis, C. acuticarinata, C. australis, C. ceres, C. clathrata, C. contracta, C. egertonianus, C. favrei, C. gabrielis, C. jaworskii, C. kipandeensis, C. mailleana, C. matheroniana, C. minchiahamplonensis, C. ornata, C. rothi, C. royei, C. sheikhfadli, C. texta, C. vulgaris, C. wadei, C. waihaoensis, C. woodsi, C. coxi, C. fuegunensis, C. aalensis, C. powersi, C. rothi, C. waihaoensis, Idonearca aequilateralis, Idonearca glabra, Idonearca matheroni
Synonymy list
| Year | Name and author |
|---|---|
| 1958 | Cucullaea (Idonearca) buttensis Anderson p. 92 figs. Plate 61, figures 5, 5a, 5b |
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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.
†Cucullaea (Idonearca) buttensis Anderson 1958
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Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| F. M. Anderson 1958 | Test thick, shell triangular in outline, as seen from the side; umbones high, broad, rounded, inflated; beaks central, or a little in advance of center, incurved, approximate, nearly touching, or less than 8 mm apart; posterior umbonal ridge somewhat angulate, with an abrupt posterior slope, more rounded in front; sides of valves slightly flattened; base of shell broadly rounded. Surface of shell smooth, though marked by numerous concentric lines of growth and by radial lines, the latter most clearly seen on the posterior part of the shell ; base broadly rounded. |
Measurements
No measurements are available
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| Source: g = genus, f = family, o = order | |||||
| Reference: Aberhan et al. 2004 | |||||
Age range: Middle Campanian or 83.50000 to 70.60000 Ma
Collections: one only
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Middle Campanian | USA (California) | Cucullaea truncata (type locality: 86936) |