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Taxonomy
Trinacria cor was named by Popenoe (1937). Its type specimen is CIT (IP) 3418 and is a 3D body fossil. Its type locality is CIT loc. 974, Aliso-Santiago Creek Divide, which is in a Campanian coastal sandstone in the Williams Formation of California.
Sister species lacking formal opinion data
T. acutangula, T. acutangulum, T. aries, T. bruxellensis, T. coronatum, T. corvamnis, T. crassa, T. deltoidea, T. distincta, T. excavata, T. grevillei, T. heibergii, T. indefinita, T. insipiens, T. media, T. meeki, T. meekii, T. microcancellata, T. microcancellata, T. pileolus, T. swastika, T. tessela, T. tristictia, T. excava, T. racovitzae
Synonymy list
| Year | Name and author |
|---|---|
| 1937 | Trinacria cor Popenoe p. 380 figs. Plate 45, figures 1-3 |
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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.
†Trinacria cor Popenoe 1937
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Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| W. P. Popenoe 1937 | Shell large and massive for the genus, high, short, angular; beaks small, sharply incurved, opisthogyrous; dorsal anterior margin concave directly in front of the beaks, merging thence into the tumid anterior margin; ventral margin nearly straight; posterior margin abruptly truncate immediately back of the beaks, separated from the lateral portions of the shell by an abrupt umbonal angulation; lateral and ventral surfaces of the shell meeting at nearly a right angle; posterior shell surface back of the angulation nearly flat; sculpture of fine growth lines with occasional deeper incised concentric grooves marking resting stages of growth; very fine rather widely spaced radial lines appear on well-preserved specimens; area short, amphidetic, shallow, directly beneath the beaks; dentition of about five minute chevron-shaped teeth on each side of the beak; muscle scars and pallial line unknown. |
Measurements
No measurements are available
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| Source: f = family | |||||
| Reference: Mikkelsen and Bieler 2008 | |||||
Age range: base of the Turonian to the top of the Maastrichtian or 93.90000 to 66.00000 Ma
Collections (23 total)
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Late/Upper Turonian | USA (California) | Trinacria cor (215284) | |
| Turonian | USA (California) | Trinacria cor (220936) | |
| Early/Lower Campanian | USA (California) | Trinacria cor (220366) | |
| Late/Upper Campanian | USA (California) | Trinacria cor (1519 1548 type locality: 72057 86793 86794 221105) | |
| Middle Campanian | USA (California) | Trinacria cor (144763 144764 185178 219079 220910 220911 220912 220913 220916 220919 221107) | |
| Late/Upper Campanian - Early/Lower Maastrichtian | USA (California) | Trinacria cor (1533) | |
| Early/Lower Maastrichtian | USA (California) | Trinacria cor (1545) | |
| Maastrichtian | USA (California) | Trinacria cor (1354) |