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Cucullaea (Idonearca) alamoensis
Taxonomy
Cucullaea (Idonearca) alamoensis was named by Anderson (1958). It is a 3D body fossil. Its type locality is CAS Loc. 1346, Ono, which is in an Albian marine siliciclastic in the Budden Canyon Formation of California.
Sister species lacking formal opinion data
Arca gabrielis, C. acuticarinata, C. antarctica, 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) alamoensis Anderson p. 88 |
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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) alamoensis Anderson 1958
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Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| F. M. Anderson 1958 | The shell is of medium size, subtriangular in outline, elongated, length exceeding height, moderately inflated ; umbones tumid, with strongly angulated umbonal ridges sloping to the rear; shell somewhat squarely truncated in front, bearing brief winglike expansions before and behind; base broadly rounded; hinge long, set with about 8 short, nearly vertical teeth, and 3 strong lateral teeth before, and apparently the same number behind ; ligamental area of moderate height, showing 6 or 7 chevronlilce grooves beneath beak; beaks small, prominent, incurved, but not closely approximate; test thick, surface smooth, though marked by nu merous growth lines, and also by radial lines below beak, most clearly seen on median layers of shell, especially on anterior half. |