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Apiotoma californiana
Taxonomy
Apiotoma californiana was named by Squires (1987). Its type specimen is LACMIP 7494 and is a 3D body fossil.
Sister species lacking formal opinion data
Synonymy list
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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.
†Apiotoma californiana Squires 1987
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Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| R. L. Squires 1987 | Genus assignment based on medium , elongate- fusiform shell with a tall spire , whorls angulate above middle portion , ramp area sunken , and weak spiral sculpture. Spe- cific assignment based on whorls strongly angu late , anterior half of whorls nearly straight-sided , whorls covered with spi- ral threads (strongest in area between suture and shoulder).
Apiotoma californiana new species is similar to Apiotoma pirulata (Deshayes, 1834:449, pl. 66, figs. 1-3; Cossmann and Pissarro , 1910-1913 :pl. 51, fig. 223 bis 19; Wenz , 1943: fig. 3914; Powell, 1966:36, pl. 3, fig. 23), the type species, from lower and middle Eocene strata (Cuisian Substage and Lutetian Stage) of the Paris Basin , France . Apioto ma cali- forniana differs from examined specimens of A. pirulata in the following features: larger, more angulate whorls, spiral sculpture much less prominent (especially anterior to the shoulder) , shoulder slope more sunken , absence of any ten - dency for weak collabral sculpture , and absence of weak can - cellate sculpture. Apiotoma californiana new species differs from A. ander- soni (Dickerson , 1914d:149,pl. 16,fig.11;Zinsmeister , 1974: 164-165 , pl. 17, figs. 1- 4) from upper Paleocene strata in California and the only other species of this genus on the West Coast in the following features: lack of nodes on the angulation and no spiral ribbing that alternates in size on the body whorl. |
Measurements
No measurements are available
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| Source: superf = superfamily, c = class | |||||
| References: Hendy et al. 2009, Kiessling 2004 | |||||