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Argopecten cristobalensis
Taxonomy
Pecten (Plagioctenium) cristobalensis was named by Hertlein (1925). Its type specimen is LSJU (no number), a shell, and it is a 3D body fossil.
It was recombined as Chlamys (Argopecten) cristobalensis by Hertlein and Grant (1972); it was recombined as Argopecten cristobalensis by Moore (1984).
It was recombined as Chlamys (Argopecten) cristobalensis by Hertlein and Grant (1972); it was recombined as Argopecten cristobalensis by Moore (1984).
Sister species lacking formal opinion data
Synonymy list
| Year | Name and author |
|---|---|
| 1925 | Pecten (Plagioctenium) cristobalensis Hertlein figs. pl. 3, figs. 1, 2, 5 |
| 1926 | Pecten (Plagioctenium) cristobalensis Jordan and Hertlein p. 439 |
| 1972 | Chlamys (Argopecten) cristobalensis Hertlein and Grant p. 200 |
| 1984 | Argopecten cristobalensis Moore p. B40 figs. Plate 13, figure 1 |
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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.
†Argopecten cristobalensis Hertlein 1925
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Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| L. G. Hertlein 1925 | Shell large, fairly thick, in several specimens with strong lines of restricted growth; valves moderately arched. Right valve ornamented by about 24 flat-topped, squarish, radiating ribs, separated by flat-bottomed, slightly narrower, inter- spaces, the whole surface crossed by well defined, wavy, concentric lines of growth ; anterior and posterior margins of valve smooth except for concentric incremental sculpture; ventral margin evenly rounded; ears unequal, the anterior ear with a large byssal notch, and ornamented by about five radiating riblets crossed by concentric lines of growth ; the posterior ear also bearing about five or six radiating riblets crossed by growth lines. Left valve slightly more convex than right and sculptured much as the latter, the anterior and posterior mar- gins with concentric lines of growth only ; ears ornamented by about eight or nine radiating riblets, the anterior ear with a slight notch. Altitude 117 mm. ; longitude 135 mm. ; diameter right valve approximately 17 mm.; apical angle of right valve approximately 100°- 110°. |
Measurements
No measurements are available
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| Source: g = genus, f = family, o = order | |||||
| Reference: Kiessling 2004 | |||||
Age range: Pliocene or 5.33300 to 2.58800 Ma
Collections (7 total)
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Pliocene | Mexico (Baja) | Argopecten cristobalensis (66173) | |
| Pliocene | Mexico (Baja California Sur) | Pecten cristobalensis (43686) | |
| Pliocene | Mexico (Sonora) | Pecten cristobalensis (96564) | |
| Pliocene | Mexico (Baja California) | Pecten cristobalensis (97124 97126 97127 97129) |