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Geological Survey Professional Paper 58
The Guadalupian Fauna |
PLATES — PLATE XXXI.
DELAWARE MOUNTAIN FORMATION, GLASS MOUNTAINS.
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RICHTHOFENIA PERMIANA Shumard (p. 283). | |
| FIGS. 1 and la. |
A silicified ventral valve deformed by compression. |
| 1. |
External view, somewhat oblique to the posterior side. |
| 1a. |
View looking obliquely into the interior against the cardinal side. At the back near the center is seen the inner side of the area and pseudodeltidium. On either hand are two longitudinal ridges or "dental callosities," which end naturally at about the same level, indicating the position of the opercular dorsal valve. In the present specimen the thinner portions of the shell above have mostly been broken away. In front, opposite the pseudodeltidium, is the rather broad ridge which forms the septum, if so it may be called. Delaware Mountain formation, Glass Mountains (station 3763). |
| FIGS. 2 to 2b. |
Another ventral valve similarly preserved. |
| 2. |
Exterior view of the posterior side. |
| 2a. |
Side view in outline. |
| 2b. |
View of the interior looking obliquely downward against the posterior side. The parts shown are the same as in 1a. Symmetrically placed at the back are the two dental callosities ending above at the same level. Between them are the area and pseudodeltidium, while in front, directly opposite, is the "septum." Delaware Mountain formation, Glass Mountains (station 3763). |
| FIG. 3. |
Another similar specimen. View looking obliquely downward into the interior against the left side. In this case the broadly rounded "septum" is at the right. At the left and in the background is a dental callosity with its naturally finished upper end. A projection at this level can be traced more or less clearly to the opposite side. In the foreground, at a much lower elevation and consequently at an earlier and less developed stage, is the second dental callosity, with the area and pseudo deltidium between them. Delaware Mountain formation, Glass Mountains (station 3763). |
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AULOSTEGES MAGNICOSTATUS n. sp. (p. 278). | |
| FIGS. 4 to 4b. |
An imperfect silicified specimen showing both valves. |
| 4. |
Dorsal view, X 2. |
| 4a. |
Ventral view, X 2. |
| 4b. |
Side view in outline, X 2. Delaware Mountain formation, mountains northwest of Marathon (station 3840). |
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PRODUCTUS GUADALUPENSIS var. COMANCHEANUS n. var. (p. 261). | |
| FIGS. 5 to 5b. |
A ventral valve. |
| 5. |
Seen from above. |
| 5a. |
Posterior view. |
| 5b. |
Side view in outline. Delaware Mountain formation, Glass Mountains (station 3763). |
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CAMAROPHORIA VENUSTA n. sp. (p. 303). | |
| FIGS. 6 to 6c. |
The type specimen, preserving both valves in conjunction. |
| 6. |
Ventral view. |
| 6a. |
Side view in outline. |
| 6b. |
Anterior view. |
| 6c. |
Dorsal view. Delaware Mountain formation, Glass Mountains (station 3763). |
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NOTOTHYRIS sp. (p. 337). | |
| FIG. 7. |
An imperfect dorsal valve. View of the interior, showing the perforated hinge plate, X 2. Delaware Mountain formation, Glass Mountains (station 3763). |
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AVICULIPECTEN sp. b (p. 437). | |
| FIG. 8. |
An imperfect left (?) valve. >View of the exterior, showing the sculpture. Delaware Mountain formation, Glass Mountains (station 3763). |
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AVICULIPECTEN sp. b var. (p. 438). | |
| FIG. 9. |
An imperfect left (?) valve. View of the exterior, X 2, showing the sculpture. Delaware Mountain formation, Glass Mountains (station 3763). |
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AVICULIPECTEN sp. c (p. 438). | |
| FIG. 10. |
Fragment of a left (?) valve. Exterior view, X 2, showing sculpture. Delaware Mountain formation, Glass Mountains (station 3763). |
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PTERIA SQUAMIFERA n. sp. (p. 427). | |
| FIGS. 11 and 11a. |
A somewhat imperfect left valve. |
| 11. |
Seen from above, X 2. |
| 11a. |
Same in outline, natural size. Delaware Mountain formation, Glass Mountains (station 3763). |
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ASTARTELLA NASUTA n. sp. (p. 445). | |
| FIGS. 12 and 12a. |
An imperfect left valve, silicified and etched. |
| 12. |
Seen from above, X 2. |
| 12a. |
Same in outline, natural size. Delaware Mountain formation, Glass Mountains (station 3763). |
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PARALLELODON MULTISTRIATUS n. sp. (p. 423). | |
| FIG. 13. |
An imperfect left valve. Seen from above. Delaware Mountain formation, Glass Mountains (station 3763). |
| FIGS. 14 and 14a. |
A smaller left valve. |
| 14. |
Seen from above, X 2. |
| 14a. |
Same in outline, natural size. Delaware Mountain formation, Glass Mountains (Station 3763). |
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PARALLELODON? sp. (p. 424). | |
| FIG. 15. |
An imperfect right valve of doubtful affinities. Seen from above. Delaware Mountain formation, Glass Mountains (station 3763). |
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THAMNISCUS sp. (p. 148). | |
| FIG. 16. |
A silicified specimen. Poriferous Side, X 2. Delaware Mountain formation, mountains northwest of Marathon (station 3840). |
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RHOMBOPORA aff. R. LEPIDODENDROIDES Meek (p. 153). | |
| FIG. 17. |
A silicified specimen. Side view, X 6. Delaware Mountain formation, mountains northwest of Marathon (station 3840). |
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MEEKOPORA sp. (p. 127). | |
| FIGS. 18 to 18b. |
A fragmentary specimen. |
| 18. |
Seen from the side. |
| 18a. |
Seen edgewise. |
| 18b. |
Side view, X 3. Delaware Mountain formation, Glass Mountains (station 3763). |
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DOMOPORA? HILLANA n. sp. (p. 124). | |
| FIG. 19. |
Frond. |
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Seen from the side, X 4. Delaware Mountain formation, Glass Mountains (station 3763). | |
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CYSTOTHALAMIA NODULIFERA n. sp. (p. 89). | |
| FIGS. 20 to 20b. |
Two silicified specimens. |
| 20. |
Seen from the side. |
| 20a. |
Same, X3. |
| 20b. |
A natural section obliquely across one of the specimens, X 3. Delaware Mountain formation, Glass Mountains (station 3763). |
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| Plate XXXI. (click on image for a PDF version) |
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Last Updated: 05-Dec-2008