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Geological Survey Professional Paper 58
The Guadalupian Fauna |
PLATES — PLATE VII.
CAPITAN FORMATION, GUADALUPE MOUNTAINS.
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CYSTOTHALAMIA NODULIFERA n. sp. (p. 89). | |
| FIG. 1. |
A specimen embedded in rock. Polished section through a branch nearly parallel to the axis and near the surface, showing the irregularly cystose internal structure, X 3. Capitan formation, Capitan Peak (station 2966). |
| FIG. 2. |
Fragment of a specimen with ostia and nodular surface. Side view. Capitan formation, Capitan Peak (station 2966). |
| FIG. 3. |
A larger specimen with prominent spoutlike ostia and less distinctly nodular surface. Side view. Capitan formation, Capitan Peak (station 2966). |
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STEINMANNIA AMERICANA n. sp. (p. 92). | |
| FIGS. 4 and 4a. |
The typical and only specimen. |
| 4. |
Side view showing the annular growth and porous structure. |
| 4a. |
Opposite side, forming a natural section somewhat diagonal but in a general way longitudinal. The construction of superposed discoidal chambers is well shown. Capitan formation, Capitan Peak (station 2926). |
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CYSTOTHALAMIA? sp. (p. 91). | |
| FIG. 5. |
A specimen which is apparently an internal cast, referred to this genus with much doubt. Side view. Capitan formation, Capitan Peak (station 2926). |
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SOLLASIA? sp. (p. 93). | |
| FIG. 6. |
A specimen referred with doubt to this genus. Side view, X 2. Capitan formation, Capitan Peak (station 2926). |
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AMBLYSIPHONELLA GUADALUPENSIS n. sp. (p. 91). | |
| FIG. 7. |
The typical specimen embedded in limestone. Natural section longitudinally through the specimen, showing the distinctive characters. Capitan formation, Capitan Peak (station 2966). |
| FIGS. 8 and 8a. |
Another specimen referred to this species, from the same locality as the type. |
| 8. |
Transverse section. |
| 8a. |
Side view of exterior. The surface characters may be in part extrinsic. Capitan formation, Capitan Peak (station 2966). |
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GUADALUPIA FAVOSA n. sp. (p. 83). | |
| FIG. 9. |
The typical specimen, from which the outer layer has been largely removed. Side view. Capitan formation, Capitan Peak (station 2926). |
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ANTHRACOSYCON FICUS var. CAPITANENSE n. var. (p. 72). | |
| FIG. 10. |
The typical specimen. Side view. Capitan formation, Capitan Peak (station 2926). |
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VIRGULA NEPTUNIA n. sp. (p. 74), | |
| FIG. 11. |
Specimen embedded in limestone. Fracture surface, X 5. Capitan formation, Capitan Peak (station 2926). |
| FIG. 12. |
A partly weathered specimen which may he taken as the type. Natural section more or less transverse, X 5. Capitan formation, Capitan Peak (station 2926). |
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VIRGULA RIGIDA n. sp. (p. 74). | |
| FIG. 13. |
The typical specimen. Side view. Capitan formation, Capitan Peak (station 2926). |
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VIRGULA RIGIDA var. CONSTRICTA n. var. (p. 75). | |
| FIG. 14. |
The typical specimen. Side view. Capitan formation, Capitan Peak (station 2926). |
| FIG. 15. |
A specimen placed with doubt in this variety. Side view. Capitan formation, Capitan Peak (station 2926). |
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PSEUDOVIRGULA TENUIS n. sp. (p. 76). | |
| FIG. 16 and 16a. |
The typical specimen, a small fragment embedded in limestone. 16. Side view showing the large ostia, X 5. |
| 16a. |
Transverse section showing the spicular network of the central portion and an irregular outer zone, probably adventitious, in which the spicular structure is not developed, X 5. Capitan formation, Capitan Peak (station 2926). |
| FIG. 17. |
Another specimen referred with some doubt to this species. Section in part longitudinal and in part transverse, X 5. Capitan formation, Capitan Peak (station 2926). |
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CAMPOPHYLLUM TEXANUM Shumard? (p. 102). | |
| FIG. 18. |
A crushed specimen, the only one of the sort found. It is referred with doubt to Shumard's species. Side view. Capitan formation, Capitan Peak (station 2926). |
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DOMOPORA? TERMINALIS n. sp. (p. 120). | |
| FIGS. 19 to 19b. |
A colony showing the construction of superposed layers. |
| 19. |
Longitudinal section, X 20. |
| 19a. |
Tangential section through a portion of the same specimen, X 35. |
| 19b. |
Tangential section, X 20. Capitan formation, Capitan Peak (station 2926). |
| FIGS. 20 and 20a. |
A globose specimen. |
| 20. |
Viewed from above, X 4. |
| 20a. |
Side view, X 4. Capitan formation, hill southwest of Guadalupe Point (station 2906). |
| FIGS. 21 and 21a. |
A more slender elongate specimen. |
| 21. |
Viewed from above, X 4. |
| 21a. |
Side view, X 4. Capitan formation, hill southwest of Guadalupe Point (station 2906). |
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| Plate VII. (click on image for a PDF version) |
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Last Updated: 05-Dec-2008