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Geological Survey Professional Paper 58
The Guadalupian Fauna |
PLATES — PLATE XVII.
CAPITAN FORMATION, GUADALUPE MOUNTAINS.
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DIELASMA SULCATUM n. sp. (p. 332). | |
| FIGS. 1 to 1c. |
The ventral beak is somewhat crushed, causing it to appear probably a little broader and less erect than normal. |
| 1. |
Dorsal view. |
| 1a. |
Ventral view. |
| 1b. |
Side view in outline. |
| 1c. |
Anterior view. Capitan formation, Capitan Peak (station 2926). |
|
DIELASMA CORDATUM n. sp. (p. 331). | |
| FIGS. 2 to 2c. |
The flattening of the anterior half of the dorsal valve has been a little exaggerated by compression. |
| 2. |
Anterior view. |
| 2a. |
Ventral view. |
| 2b. |
Dorsal view. |
| 2c. |
Side view in outline. Capitan formation, Capitan Peak (Station 2926). |
|
DIELASMA SPATULATUM n. sp. (p. 330). | |
| FIGS. 3 to 3c. |
The typical specimen. |
| 3. |
Dorsal view. |
| 3a. |
Ventral view. |
| 3b. |
Side view in outline. |
| 3c. |
Anterior view in outline. Capitan formation, Capitan Peak (station 2926). |
| FIGS. 4 to 4c. |
A small specimen provisionally referred to this species. |
| 4. |
Ventral view. |
| 4a. |
Dorsal view. |
| 4b. |
Side view in outline. |
| 4c. |
Anterior view in outline. Capitan formation, Capitan Peak (station 2926). |
|
DIELASMA PROLONGATUM n. sp. (p. 331). | |
| FIGS. 5 to 5c. |
A somewhat imperfect specimen serving as the type. |
| 5. |
Ventral view. |
| 5a. |
Side view. |
| 5b. |
Anterior view. |
| Sc. |
Dorsal view. Capitan formation, McKitterick Canyon (Station 2932). |
|
DIELASMINA GUADALUPENSIS n. sp. (p. 333). | |
| FIGS. 6 to 6b. |
The type specimen, retaining both valves but somewhat distorted by crushing. |
| 6. |
Ventral view. |
| 6a. |
Side view in outline. |
| 6b. |
Anterior view. Owing to breakage and perhaps compression, the right side of the specimen is thicker than the left, as shown here. Capitan formation, Capitan Peak (station 2926). |
| FIGS. 7 and 7a. |
A ventral valve with more persistent sinus. |
| 7. |
Seen from above. |
| 7a. |
Side view in outline. Capitan formation, Capitan Peak (station 2926). |
|
DIELASMA? SCUTULATUM n. sp. (p. 332). | |
| FIGS. 8 to 8c. |
The typical specimen. |
| 8. |
Dorsal view, X 2. |
| 8a. |
Ventral view, X 2. |
| 8b. |
Side view in outline, X 2. |
| 8c. |
Anterior view in outline, X 2. Capitan formation, Capitan Peak (station 2926). |
| FIGS. 9 to 9b. |
A second specimen of somewhat different shape. |
| 9. |
Dorsal view, X 2. |
| 9a. |
Side view in outline, X 2. |
| 9b. |
Anterior view, X 2. Capitan formation, Capitan Peak (station 2926). |
|
RHYNCHONELLA? GUADALUPAE Shumard (p. 323). | |
| FIGS. 10 to 10b. |
The typical specimen, from which the anterior portion has apparently been broken away (after Shumard). |
| 10. |
Dorsal view. |
| 10a. |
Ventral view. |
| 10b. |
Posterior view. Capitan formation, Guadalupe Mountains. |
"DARK LIMESTONE," GUADALUPE MOUNTAINS.
|
POLYSIPHON MIRABILIS n. sp. (p. 87). | |
| FIGS. 11 to 11b. |
A silicified specimen used as the type. |
| 11. |
Seen from above, X 3. |
| 11a. |
Seen from below, X 3. |
| 11b. |
Side view, X 3. "Dark limestone," Pine Spring (station 2930). |
|
HUSTEDIA MEEKANA var. TRIGONALIS n. var. (p. 396). | |
| FIG. 12. |
Fragment of the apical portions of the two valves, showing the internal structures. |
|
View looking obliquely downward upon the interior, X 10. "Dark limestone," Pine Spring (station 2930). | |
|
CYTHERE? sp. (p. 509). | |
| FIGS. 13 and 13a. |
An imperfect right valve. |
| 13. |
Side view, X 10. |
| 13a. |
Ventral view in outline, X 10. "Dark limestone," Pine Spring (station 2930). |
|
ANISOPYGE PERANNULATA Shumard (p. 506). | |
| FIGS. 14 and 14a. |
An imperfect pygidium. |
| 14. |
Seen from above, X 2. The uncompensated fragment at the top (left side of figure) appears to be one of the pleura. |
| 14a. |
Side view, X 2. "Dark limestone," Pine Spring (station 2930). |
| FIGS. 15 and 15a. |
A small but nearly perfect pygidium. |
| 15. |
Seen from above, X 2. |
| 15a. |
Side view, X 2. "Dark limestone," Pine Spring (station 2930). |
| FIG. 16. |
An unusually wide pygidium, probably rendered so by compression. Seen from above, X 2. "Dark limestone," Pine Spring (station 2930). |
| FIG. 17. |
A fairly perfect cranidium. Seen from above, X 2. "Dark limestone," Pine Spring (station 2930). |
| FIG. 18. |
An imperfect free cheek. Seen from above, X 2. "Dark limestone," Pine Spring (station 2930). |
| FIG. 19. |
A nearly perfect free cheek. Seen from above, X 2. "Dark limestone," Pine Spring (station 2930). |
|
AVICULIPECTEN GUADALUPENSIS n. sp. (p. 436). | |
| FIGS. 20 and 20a. |
A left valve, about half mature size. |
| 20. |
Side view, X 2. |
| 20a. |
Same, natural size in outline. "Dark limestone," Pine Spring (station 2930). |
|
AVICULIPECTEN sp. a (p. 436). | |
| FIG. 21. |
A left (?) valve. If a right valve instead of a left, this may be the complementary valve of the foregoing species. Side view, X 2. "Dark limestone," Pine Spring (station 2930). |
|
MYALINA SQUAMOSA Sowerby? (p. 429). | |
| FIG. 22. |
A left valve preserved for the most part as an internal mold Side view. "Dark limestone," Pine Spring (station 2930). |
|
EUOMPHALUS SULCIFER n. sp. (p. 482). | |
| FIGS. 23 and 23a. |
An imperfect specimen. |
| 23. |
Upper side, X 2. |
| 23a. |
Same, natural size in outline. "Dark limestone," Pine Spring (station 2930). |
| FIGS. 24 and 24a. |
A second specimen showing the lower side. |
| 24. |
Lower side, X 2. |
| 24a. |
Same, natural size in outline. "Dark limestone," Pine Spring (station 2930). |
|
EUOMPHALUS SULCIFER var. ANGULATUS n. var. (p. 483). | |
| FIGS. 25 and 25a. |
The type specimen. |
| 25. |
Upper side, X 2. |
| 25a. |
Same, natural size in outline. "Dark limestone," Pine Spring (station 2930). |
 |
| Plate XVI. (click on image for a PDF version) |
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Last Updated: 05-Dec-2008