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Eumorphoceras paucinodum
Taxonomy
Eumorphoceras paucinodum was named by Gordon (1964). Its type specimen is LSJU 9163, a shell, and it is a 3D body fossil. Its type locality is USGS loc. 15783-PC, Cottonwood Mountains, which is in an Arnsbergian marine limestone/siltstone in the Rest Spring Formation of California.
Synonymy list
| Year | Name and author |
|---|---|
| 1964 | Eumorphoceras paucinodum Gordon, Jr. p. A17 figs. Pl 2, figs 7-9; text-fig 7 |
| 1971 | Eumorphoceras paucinodum Ruzhentsev and Bogoslovskaya p. 185 figs. Pl 8, figs 2,3; text-fig 28a |
| 2000 | Eumorphoceras paucinodum Titus p. 18 figs. Plate 1, figures 6-23; figure 15 |
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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.
†Eumorphoceras paucinodum Gordon, Jr. 1964
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Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| M. Gordon 1964 | Eumorphoceras ornamented in late ado- lescent phragmocone with a prominent sulcus bordering each flank and 11 to 12 broad weak sickle-shaped ribs, each terminating dorsad in a prominent umbilical node and dying out gradually ventrad | |
| A. L. Titus 2000 | Species with compressed conchs and prominent ribs (around 20-22 per whorl) up to diameters of approxi- mately 6-8 mm. Larger conchs (9-20 mm diameter) distin- guished by their compressed outline and sparse nodes on the umbilical shoulder. Shells larger than 30 mm cannot cur- rently be differentiated from similar species. |