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Geological Survey Professional Paper 58
The Guadalupian Fauna |
PLATES — PLATE XX.
"DARK LIMESTONE," GUADALUPE MOUNTAINS.
|
CHONETES PERMIANUS Shumard (p. 226). | |
| FIGS. 1 and 1a. |
A ventral valve of medium size. |
| 1. |
Seen from above. |
| 1a. |
Side view in outline. "Dark limestone," Pine Spring (station 2930). |
| FIGS. 2 and 2a. |
A small specimen. |
| 2. |
Dorsal view, showing area of the opposite valve. |
| 2a. |
Side view in outline. "Dark limestone," Pine Spring (station 2930). |
| FIGS. 3 and 3a. |
A small ventral valve. |
| 3. |
Seen from above. |
| 3a. |
Side view in outline. "Dark limestone," Pine Spring (station 2930). |
|
CHONETES SUBLIRATUS n. sp. (p. 228). | |
| FIGS. 4 and 4a. |
A somewhat imperfect ventral valve taken as the type of this species. |
| 4. |
Seen from above. |
| 4a. |
Side view. "Dark limestone," Pine Spring (station 2930). |
| FIGS. 5 to 5b. |
A younger example referred to the same species. The sinus and convexity are less marked, but the shape is even more quadrate. |
| 5. |
Seen from above. |
| 5a. |
Side view in outline. |
| 5b. |
Posterior view in outline. "Dark limestone," Pine Spring (station 2930). |
| FIGS. 6 and 6a. |
A young ventral valve referred to this species. |
| 6. |
Seen from above. |
| 6a. |
Same, X 3. The concentric lines which are a feature of the original do not appear upon this figure. "Dark limestone," Pine Spring (station 2930). |
| FIG. 7. |
A still younger ventral valve referred here. Seen from above, X 3. The concentric lirae found on the original are not shown by this figure. "Dark limestone," Pine Spring (station 2930). |
|
PRODUCTUS SEMIRETICULATUS var. CAPITANENSIS n. var. (p. 254). | |
| FIGS. 8 and 8a. |
A large ventral valve which has been considerably deformed by compression. |
| 8. |
Seen from above. |
| 8a. |
Side view in outline. "Dark limestone," Pine Spring (station 2930). |
|
PRODUCTUS POPEI Shumard (p. 257). | |
| FIGS. 9 to 9c. |
A characteristic ventral valve of the type referred to Shumard's species. |
| 9. |
Seen from above. |
| 9a. |
Posterior view. |
| 9b. |
Side view. |
| 9c. |
Anterior view. "Dark limestone," Pine Spring (station 2930). |
| FIGS. 10 to 10c. |
Another ventral valve similar to the last. |
| 10. |
Seen from above. |
| 10a. |
Posterior view, |
| 10b. |
Side view in outline. |
| 10c. |
Anterior view. "Dark limestone," Pine Spring (station 2930). |
| FIGS. 11 to 11b. |
A ventral valve referred to this species with some doubt. |
| 11. |
Seen from above. |
| 11a. |
Side view in outline. |
| 11b. |
Anterior view. "Dark limestone," Pine Spring (station 2930). |
|
PRODUCTUS POPEI var. OPIMUS n. var. (p. 258). | |
| FIGS. 12 to 12c. |
A somewhat imperfect ventral valve selected as the typical specimen. |
| 12. |
Seen from above. |
| 12a. |
Anterior view. |
| 12b. |
Posterior view. |
| 12c. |
Side view. "Dark limestone," Pine Spring (station 2930). |
| FIGS. 13 to 13c. |
A ventral valve somewhat deformed by compression, which has exaggerated the depth of the sinus. |
| 13. |
Seen from above. |
| 13a. |
Anterior view. |
| 13b. |
Posterior view. |
| 13c. |
Side view in outline. "Dark limestone," Pine Spring (station 2930). |
| FIGS. 14 and 14a. |
A dorsal valve belonging to this species. |
| 14. |
Seen from above. |
| 14a. |
Side view in outline. "Dark limestone," Pine Spring (station 2930). |
|
PRODUCTUS INDENTATUS n. sp. (p. 259). | |
| FIGS. 15 to 15c. |
A typical ventral valve. |
| 15. |
Seen from above. |
| 15a. |
Side view in outline. |
| 15b. |
Anterior view. |
| 15c. |
Posterior view. "Dark limestone," Pine Spring (station 2930). |
| FIGS. 16 to 16b. |
Another ventral valve showing the characters of the species. |
| 16. |
Seen from above. |
| 16a. |
Side view in outline. |
| 16b. |
Anterior view. "Dark limestone," Pine Spring (station 2930). |
|
PRODUCTUS LIMBATUS n. sp. (p. 272). | |
| FIGS. 17 and 17a. |
An imperfect specimen showing both valves. |
| 17. |
Seen from above. |
| 17a. |
Side view in outline. "Dark limestone," Pine Spring (station 2930). |
| FIG. 18. |
Another ventral valve, referred to this species. Seen from above. "Dark limestone," Pine Spring (station 2930). |
|
PRODUCTUS sp. d (p 273). | |
| FIGS. 19 and 19a. |
A dorsal valve referred to this species. |
| 19. |
Seen from above. |
| 19a. |
Side view in outline. "Dark limestone," Pine Spring (station 2930). |
| FIGS. 20 and 20a. |
An imperfect ventral valve. |
| 20. |
Seen from above. |
| 20a. |
Side view in outline. "Dark limestone," Pine Spring (station 2930). |
| FIGS. 21 and 21a. |
Another imperfect ventral valve, slightly larger than the last and somewhat more closely ribbed. |
| 21. |
Seen from above. |
| 21a. |
Anterior view. "Dark limestone," Pine Spring (station 2930). |
|
AULOSTEGES GUADALUPENSIS Shumard (p. 277). | |
| FIGS. 22 and 22a. |
An imperfect ventral valve resembling that upon which the species was founded. |
| 22. |
Seen from above. |
| 22a. |
Side view in outline. "Dark limestone," Pine Spring (station 2930). |
|
RICHTHOFENIA PERMIANA Shumard (p. 283). | |
| FIG. 23. |
A specimen which has been reduced by exfoliation almost to the condition of an internal mold. Posterior view, slightly tilted. Above is the dorsal valve; below, the cystose portion; in the center, the pseudodeltidium and other structures exposed by exfoliation. "Dark limestone," Pine Spring (station 2930). |
 |
| Plate XX. (click on image for a PDF version) |
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Last Updated: 05-Dec-2008