|
Geological Survey Professional Paper 58
The Guadalupian Fauna |
PLATES — PLATE XXIII.
DELAWARE MOUNTAIN FORMATION, GUADALUPE MOUNTAINS.
|
PTERIA sp. (p. 429). | |
| FIG. 1. |
An imperfect left valve. Side view. Delaware Mountain formation, Guadalupe Point (station 2931). |
|
AVICULIPECTEN DELAWARENSIS n. sp. (p. 437). | |
| FIGS. 2 and 2a. |
A left valve. |
| 2. |
Side view, X 2. |
| 2a. |
Same, natural size, in outline. Delaware Mountain formation, Guadalupe Point (station 2931). |
|
MYOCONCHA COSTULATA var. DELAWARENSIS n. var. (p. 444). | |
| FIG. 3. |
A large left valve somewhat crushed and imperfect. Side view. Delaware Mountain formation, Guadalupe Point (station 2931). |
|
PLEUROPHORUS DELAWARENSIS n. sp. (p. 446). | |
| FIG. 4. |
An internal mold of a left valve. Side view. Delaware Mountain formation, Guadalupe Point (station 2931). |
|
CLEIDOPHORUS PALLASI var. DELAWARENSIS n. var. (p. 447). | |
| FIGS. 5 and 5a. |
A right valve. |
| 5. |
Side view, X 2. |
| 5a. |
Same, natural size, in outline. Delaware Mountain formation, Guadalupe Point (station 2931). |
|
ASTARTELLA NASUTA n. sp. (p. 445). | |
| FIGS. 6 and 6a. |
Internal mold of a left valve. |
| 6. |
Side view, X 2. |
| 6a. |
Same, natural size, in outline. Delaware Mountain formation, Guadalupe Point (station 2931). |
| FIGS. 7 and 7a. |
Internal mold of a right valve. |
| 7. |
Side view, X 2. |
| 7a. |
Same, natural size, in outline. Delaware Mountain formation, Guadalupe Point (station 2931). |
|
NUCULA sp. b (p. 421). | |
| FIG. 8. |
Internal mold of a left valve. Side view, X 2. Delaware Mountain formation, Guadalupe Point (station 2931). |
|
GASTRIOCERAS? SERRATUM n. sp. (p. 500). | |
| FIGS. 9 to 9d. |
A mold in fine sandstone. |
| 9. |
View of ventral surface, X 2. |
| 9a. |
Opposite view, X 2. One of the sutures is seen above at the left. |
| 9b. |
Side view, X 2. |
| 9c. |
Same, natural size, in outline. |
| 9d. |
Suture line, X 2. Delaware Mountain formation, Guadalupe Point (station 2931). |
|
ORTHOCERAS GUADALUPENSE n. sp. (p. 497). | |
| FIGS. 10 to 10b. |
The typical specimen. |
| 10. |
Side view. |
| 10a. |
Opposite side, eroded and showing concavity of sutures. |
| 10b. |
End view. Delaware Mountain formation, Guadalupe Point (station 2931). |
|
PLAGIOGLYPTA CANNA White? (p. 450). | |
| FIG. 11. |
A large specimen which tapers very little. |
|
Side view. | |
|
Delaware Mountain formation, Guadalupe Point (station 2931). | |
| FIG. 12. |
A smaller specimen in which the taper is more apparent. Side view. Delaware Mountain formation, Guadalupe Point (station 2931). |
| FIG. 13. |
A small specimen with gradual but obvious taper. |
|
Side view. | |
|
Delaware Mountain formation, Guadalupe Point (station 2931). | |
|
BUCANOPSIS sp. (p. 481). | |
| FIGS. 14 to 14b. |
A partial internal mold, somewhat distorted by compression. |
| 14. |
Front view. |
| 14a. |
Side view. |
| 14b. |
Impression taken from a natural mold, showing the surface of one of the earlier volutions. The mold was not very good and the sculpture of the impression is probably less distinct than the original surface, X 2. Delaware Mountain formation, Guadalupe Point (station 2931). |
|
WARTHIA AMERICANA n. sp. (p. 481). | |
| FIGS. 15 and 15a. |
A partial internal mold of a large specimen. |
| 15. |
Side view. |
| 15a. |
Anterior view, somewhat tilted backward. Delaware Mountain formation, Guadalupe Point (station 2931). |
| FIGS. 16 and 16a. |
A specimen of the usual size preserved as a mold of the interior. |
| 16. |
Outline of apertural view. |
| 16a. |
Side view. Delaware Mountain formation, Guadalupe Point (station 2931). |
| FIGS. 17 to 17b. |
A very young specimen preserved as a mold of the interior. |
| 17. |
Side view, X 4. |
| 17a. |
Same, natural size, in outline. |
| 17b. |
Apertural view in outline, X 4. Delaware Mountain formation, Guadalupe Point (station 2931). |
|
NATICOPSIS sp. (p. 485). | |
| FIGS. 18 to 18d. |
A young specimen supposed to belong to this species. It is preserved as a mold of the interior and has not been compressed. |
| 18. |
Apertural view, X 2. |
| 18a. |
View of opposite side, X 2. |
| 18b. |
Same, natural size, in outline. |
| 18c. |
Seen from above, X 2. |
| 18d. |
Same, natural size, in outline. Delaware Mountain formation, Guadalupe Point (station 2931). |
| FIGS. 19 to 19b. |
A larger specimen similarly preserved and somewhat distorted by pressure. |
| 19. |
Seen from above. |
| 19a. |
Side view. |
| 19b. |
Apertural view. Delaware Mountain formation, Guadalupe Point (station 2931). |
|
MACROCHEILINA sp. a (p. 489). | |
| FIG. 20. |
Specimen preserved as a partial internal mold. Side view. Delaware Mountain formation, Guadalupe Point (station 2931). |
|
BULIMORPHA CHRYSALIS var. DELAWARENSIS n. var. (p. 487). | |
| FIG. 21. |
Specimen preserved as a mold of the interior. Side view. Delaware Mountain formation, Guadalupe Point (station 2931). |
|
PLEUROTOMARIA EUGLYPHEA n. sp. (p. 469). | |
| FIGS. 22 to 22c. |
An impression made from a mold of the exterior. |
| 22. |
Side view, X 2. |
| 22a. |
Same, natural size, in outline. |
| 22b. |
Seen from above. |
| 22c. |
Same, natural size, in outline. Delaware Mountain formation, Guadalupe Point (station 2931). |
| FIGS. 23 to 23b. |
A partial internal mold of the same specimen. |
| 23. |
Seen from above. |
| 23a. |
Seen from below. |
| 23b. |
Side view. Delaware Mountain formation, Guadalupe Point (station 2931). |
|
PLEUHOTOMARIA? CARINIFERA n. sp. (p. 475) | |
| FIGS. 24 to 24b. |
A specimen preserved as a partial internal mold. |
| 24. |
Side view, X 3. |
| 24a. |
Same, natural size, in outline. |
| 24b. |
Seen from above, X 3. Delaware Mountain formation, Guadalupe Point (station 2931). |
|
PLEUROTOMARIA MULTILINEATA n. sp. (p. 468). | |
| FIGS. 25 to 25d. |
A specimen preserved as a partial internal mold. |
| 25. |
Seen from above, X 2. |
| 25a. |
Same, natural size, in outline. |
| FIG. 25b. |
Side view, X 2. |
| 25c. |
Same, natural size, in outline. |
| 25d. |
Umbilicus and adjacent surface from an impression of the external mold of the same specimen, X 2. Delaware Mountain formation, Guadalupe Point (station 2931). |
|
PLEUROTOMARIA ARENARIA n. sp. (p. 473). | |
| FIGS. 26 and 26a. |
A nearly perfect specimen preserved as a partial internal mold. |
| 26. |
Side view. |
| 26a. |
Enlargement of portion of the surface of the same specimen, taken from an impression of the external mold, X 3. The area presented is the upper portion of one of the whorls with the side of that above. Delaware Mountain formation, Guadalupe Point (station 2931). |
|
PLEUROTOMARIA? PLANULATA n. sp. (p. 474). | |
| FIGS. 27 to 27c. |
A specimen preserved as a partial internal mold. |
| 27. |
Side view, X 3. |
| 27a. |
Same, natural size, in outline. |
| 27b. |
Seen from above, X 3. |
| 27c. |
Seen from below, X 3. Delaware Mountain formation, Guadalupe Point (station 2931). |
|
PLEUROTOMARIA? DELAWARENSIS n. sp. (p. 475). | |
| FIGS. 28 to 28b. |
A specimen preserved as a partial internal mold. |
| 28. |
Side view, X 2. |
| 28a. |
Same, natural size, in outline. |
| 28b. |
Artificial impression from the external mold of the same specimen, showing part of the lower whorl, X 3. Delaware Mountain formation, Guadalupe Point (station 2931). |
| FIGS. 29 to 29b. |
Another specimen similarly preserved. |
| 29. |
Side view, X 2. |
| 29a. |
Same, natural size, in outline. |
| 29b. |
Artificial impression of an external mold of part of same, X 3. Delaware Mountain formation, Guadalupe Point (station 2931). |
| FIG. 30. |
An impression of part of an external mold of another specimen, which shows revolving lines on the upper portion of the peritreme, a character which seems obscured in the others. Side view, X 3. Delaware Mountain formation, Guadalupe Point (station 2931). |
 |
| Plate XXIII. (click on image for a PDF version) |
| <<< Previous | <<< Contents >>> | Next >>> |
pp/58/plate23.htm
Last Updated: 05-Dec-2008