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Excorbula
Taxonomy
Excorbula was named by Squires and Saul (2004). Its type is Excorbula parkyi.
It was assigned to Corbulinae by Squires and Saul (2004).
It was assigned to Corbulinae by Squires and Saul (2004).
Species
Synonymy list
| Year | Name and author |
|---|---|
| 2004 | Excorbula Squires and Saul pp. 113 -114 |
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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.
G. †Excorbula Squires and Saul 2004
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†Excorbula coqua Squires and Saul 2004
†Excorbula parkyi Squires and Saul 2004
†Excorbula shastana Squires and Saul 2004
Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| R. L. Squires and L. R. Saul 2004 | Shell small to medium, trigonal to trigonaloblong, with subequilateral, equally inflated, and nearly equal-sized valves. Left valve smooth or with very weak commarginal ribs, rarely with weakly ribbed nepionic cap. Right valve initially smooth or with very weak ribs becoming stronger toward venter. Posterior slope on right valve very narrow (groovelike) to moderately wide, and set off by two, narrowly spaced keels close to valve margin; one keel emanating from approximately midline of valve and other keel formed by ridge along posterior dorsal margin. Left-valve hinge with inclined, slightly projecting spoon-shaped chondrophore bearing median groove. Right-valve hinge with large, single cardinal tooth; adjoining pit deep. |
Measurements
No measurements are available
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| Source: f = family, c = class | |||||
| References: Aberhan et al. 2004, Sanchez Roig 1926 | |||||
Age range: base of the Late/Upper Turonian to the top of the Santonian or 93.50000 to 83.60000 Ma
Collections (11 total)
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Turonian | USA (California) | E. coqua (219080 220370 220375 220376) | |
| Late/Upper Turonian | USA (California) | Corbula traskii (221084) E. coqua (215287) | |
| Coniacian | USA (California) | E. parkyi (72037) | |
| Santonian | USA (California) | E. parkyi (215315) E. shastana (220379 220380) | |
| Late/Upper Santonian | USA (California) | E. shastana (215319) |