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Geological Survey Professional Paper 58
The Guadalupian Fauna |
PLATES — PLATE XV.
CAPITAN FORMATION, GUADALUPE MOUNTAINS.
|
COMPOSITA EMARGINATA n. sp. (p. 388). | |
| FIGS. 1 to 1c. |
A strongly characterized example of this species. |
| 1. |
Ventral view. |
| 1a. |
Dorsal view. |
| 1b. |
Side view in outline. |
| 1c. |
Anterior view. Capitan formation, Capitan Peak (station 2926). |
| FIGS. 2 to 2c. |
A specimen similar to the foregoing, but with the characters less strongly developed. |
| 2. |
Dorsal view. |
| 2a. |
Ventral view. |
| 2b. |
Side view in outline. |
| 2c. |
Anterior view. Capitan formation, Capitan Peak (station 2926). |
| FIGS. 3 to 3b. |
A slightly malformed specimen in which the sinus of the dorsal valve is very faint. There is an obscure emargination of the front outline. |
| 3. |
Dorsal view. |
| 3a. |
Side view in outline. |
| 3b. |
Anterior view in outline. Capitan formation, Capitan Peak (station 2926). |
| FIGS. 4 and 4a. |
A specimen in which a well-marked sinus is developed in neither valve. The dorsal valve is flattened and slightly depressed medially, and the anterior outline is straight. This form departs strongly from typical C. emarginata as shown by figs. 1 to 1c, at least in degree, and differs to no great extent from the variety affinis. Varieties of C. subtilita do not materially differ from it. |
| 4. |
Dorsal view. |
| 4a. |
Side view in outline. Capitan formation, Capitan Peak (station 2926.) |
| FIGS. 5 and 5a. |
A young example in which the two sinuses are represented by slightly depressed lines. The front outline is somewhat straight, but in the front view there is no fold and sinus. |
| 5. |
Dorsal view. |
| 5a. |
Front view in outline. Capitan formation, Capitan Peak (station 2926). |
|
COMPOSITA EMARGINATA var. AFFINIS n. var. (p. 389). | |
| FIGS. 6 to 6c. |
A large and somewhat imperfect example. |
| 6. |
Ventral view. |
| 6a. |
Anterior view in outline. |
| 6b. |
Dorsal view. |
| 6c. |
Side view in outline. Capitan formation, Capitan Peak (station 2926). |
| FIGS. 7 to 7b. |
A smaller specimen having similar characters. This form does not differ materially from varieties of C. subtilita. |
| 7. |
Dorsal view. |
| 7a. |
Ventral view. |
| 7b. |
Side view in outline. Capitan formation, Capitan Peak (station 2926). |
|
PUGNAX SWALLOWIANA Shumard (p. 314). | |
| FIGS. 8 and 8a. |
A characteristic specimen. |
| 8. |
Dorsal view. |
| 8a. |
Anterior view in outline. Capitan formation, Capitan Peak (station 2926). |
| FIGS. 9 to 9b. |
Another similar specimen. |
| 9. |
Dorsal view. |
| 9a. |
Side view. |
| 9b. |
Anterior view in outline. Capitan formation, Capitan Peak (station 2926). |
| FIGS. 10 and 10a. |
A somewhat differently shaped specimen with faint lateral plications. |
| 10. |
Side view. |
| 10a. |
Dorsal view. Capitan formation, Capitan Peak (station 2926). |
| FIGS. 11 to 11b. |
A specimen similar to the last, with rounded outline and less distinct and angular plications. |
| 11. |
Dorsal view. |
| 11a. |
Front view in outline. |
| 11b. |
Side view. Capitan formation, Capitan Peak (station 2926). |
| FIGS. 12 to 12d. |
A specimen referred to this species with only two plications on the fold, |
| 12. |
Dorsal view. |
| 12a. |
Ventral view. |
| 12b. |
Side view. |
| 12c. |
Anterior view. |
| 12d. |
Posterior view. Capitan formation, Capitan Peak (station 2926). |
|
PUGNAX ELEGANS n. sp. (p. 315). | |
| FIGS. 13 to 13c. |
A characteristic specimen. |
| 13. |
Ventral view. |
| 13a. |
Dorsal view. |
| 13b. |
Side view in outline. |
| 13c. |
Anterior view. Capitan formation, Capitan Peak (station 2926). |
| FIGS. 14 and 14a. |
Another similar specimen. |
| 14. |
Dorsal view. |
| 14a. |
Anterior view in outline. Capitan formation, Capitan Peak (station 2926). |
|
PUGNAX SHUMARDIANA n. sp. (p. 316). | |
| FIGS. 15 to 15c. |
A specimen naturally deformed but otherwise nearly perfect. |
| 15. |
Dorsal view. |
| 15a. |
Ventral view. |
| 15b. |
Side view in outline. |
| 15c. |
Anterior view. Capitan formation, Capitan Peak (station 2926). |
| FIGS. 16 to 16c. |
A small tumid specimen referred to the same species. |
| 16. |
Ventral view. |
| 16a. |
Dorsal view. |
| 16b. |
Side view. |
| 16c. |
Anterior view. Capitan formation, Capitan Peak (station 2926). |
| FIGS. 17 to 17c. |
A young specimen referred to this species. |
| 17. |
Ventral view. |
| 17a. |
Dorsal view. |
| 17b. |
Side view in outline. |
| 17c. |
Anterior view. Capitan formation, Capitan Peak (station 2926). |
|
RHYNCHONELLA? LONGAEVA n. sp. (p. 322). | |
| FIGS. 18 to 18b. |
The typical specimen, somewhat imperfect but showing both valves in conjunction. |
| 18. |
Dorsal view. |
| 18a. |
Ventral view. |
| 18b. |
Side view. Capitan formation, Capitan Peak (station 2926). |
| FIGS. 19 to 19c. |
A young example from the same locality, supposed to belong to the same species. |
| 19. |
Dorsal view, X 2. |
| 19a. |
Same, natural size in outline. |
| 19b. |
Anterior view, X 2. |
| 19c. |
Side view in outline, X 2. Capitan formation, Capitan Peak (station 2926). |
|
RHYNCHONELLA? INDENTATA Shumard (p. 321). | |
| FIGS. 20 to 20c. |
A specimen from the same horizon as Shumard's type and answering very closely to his description. |
| 20. |
Ventral view. |
| 20a. |
Dorsal view. |
| 20b. |
Anterior view. |
| 20c. |
Side view. Capitan formation, Capitan Peak (station 2926). |
|
HETERELASMA SHUMARDIANUM n. sp. (p. 338). | |
| FIGS 21 to 21c. |
The type specimen. |
| 21. |
Ventral view. |
| 21a. |
Dorsal view. |
| 21b. |
Side view in outline. |
| 21c. |
Anterior view. Capitan formation, Capitan Peak (station 2926). |
| FIGS. 22 to 22b. |
A small specimen supposed to be a young example of this species. |
| 22. |
Dorsal view, X 2. |
| 22a. |
Ventral view, X 2. |
| 22b. |
Side view in outline, X 2. Capitan formation, Capitan Peak (station 2926). |
|
HETERELASMA VENUSTULUM n. sp. (p. 339). | |
| FIGS. 23 to 23c. |
The typical specimen. |
| 23. |
Anterior view, X 2. |
| 23a. |
Side view, X 2. |
| 23b. |
Dorsal view, X 2. |
| 23c. |
Ventral view, X 2. Capitan formation, Capitan Peak (station 2926). |
| FIGS. 24 to 24b. |
A larger and relatively broader specimen |
| 24. |
Ventral view, X 2. |
| 24a. |
Side view in outline, X 2. |
| 24b. |
Anterior view, X 2. Capitan formation, Capitan Peak (station 2926). |
|
NOTOTHYRIS SCHUCHERTENSIS n. sp. (p. 336). | |
| FIGS. 25 to 25c. |
The typical specimen. |
| 25. |
Ventral view, X 2. |
| 25a. |
Dorsal view, X 2. |
| 25b. |
Side view in outline, X 2. |
| 25c. |
Anterior view, X 2. Capitan formation, Capitan Peak (station 2926). |
|
NOTOTHYRIS SCHUCHERTENSIS var. OVATA n. var. (p. 336). | |
| FIGS. 26 to 26c. |
The typical specimen. |
| 26. |
Ventral view, X 2. |
| 26a. |
Dorsal view, X 2. |
| 26b. |
Side view in outline, X 2. |
| 26c. |
Anterior view, X 2. Capitan formation, Capitan Peak (station 2926). |
 |
| Plate XV. (click on image for a PDF version) |
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Last Updated: 05-Dec-2008