USGS: Geological Survey Professional Paper 58: The Guadalupian Fauna (Plates)

Geological Survey Professional Paper 58

The Guadalupian Fauna

PLATES — PLATE XXI.

"DARK LIMESTONE," GUADALUPE MOUNTAINS.

	SPIRIFER MEXICANUS var. (p. 362).
FIGS. 1 to 1b.	An exfoliated and otherwise imperfect ventral valve.
1.	Seen from above. The fasciculation is hardly distinct enough in this figure.
1a.	Side view in outline.
1b.	Cardinal view in outline. "Dark limestone," Pine Spring (station 2930).
	SPIRIFER sp. a (p. 362).
FIG. 2.	A dorsal valve of uncertain relations. Seen from above. In this figure the ribs are represented as somewhat too distinct. "Dark limestone," Pine Spring (station 2930).
	SPIRIFERINA LAXA n. sp. (p. 377).
FIGS. 3 to 3b.	A ventral valve. The greater portion of the shell preserved consists only of the punctate, silicified inner layer, to which are adhering fragments of the dense outer layer and more extensive areas of an intermediate layer.
3.	Seen from above.
3a.	Side view in outline.
3b.	Cardinal view. "Dark limestone," Pine Spring (station 2930).
	SPIRIFERINA HILLI var. POLYPLEURUS n. var. (p. 380).
FIGS. 4 to 4c.	A ventral valve.
4.	View of the interior.
4a.	Side view in outline.
4b.	View of the exterior.
4c.	Cardinal view. "Dark limestone," Pine Spring (station 2930).
	HUSTEDIA MEEKANA Shumard (p. 394).
FIGS. 5 and 5a.	A small specimen. A much larger size is attained by others from the same locality.
5.	Dorsal view.
5a.	Side view in outline. "Dark limestone," Pine Spring (station 2930).
FIGS. 6 and 6a.	A similar specimen.
6.	Dorsal view.
6a.	Side view in outline. "Dark limestone," Pine Spring (station 2930).
FIGS. 7 and 7a.	A narrow specimen.
7.	Dorsal view
7a.	Side view. "Dark limestone," Pine Spring (station 2930).
FIGS. 8 and 8a.	A silicified ventral valve figured to show the difference of character in the two sides.
8.	External view, X 2, showing the large simple plications.
8a.	Interior view, X 2, showing the ribs flattened on top and striated at the sides. "Dark limestone," Pine Spring (station 2930).
	HUSTEDIA MEEKANA var. TRIGONALIS n. var. (p. 396).
FIGS. 9 to 9b.	A specimen with pronounced characters.
9.	Dorsal view, X 2.
9a.	Side view in outline, X 2.
9b.	Ventral view, X 2. "Dark limestone," Pine Spring (station 2930).
	PUGNAX? BISULCATA var. GRATIOSA n. var. (p. 312).
FIGS. 10 to 10c.	A perfect specimen with three large indistinct ribs on the fold.
10.	Ventral view.
10a.	Anterior view.
10b.	Dorsal view.
10c.	Side view. "Dark limestone," Pine Spring (station 2930).
	PUGNAX? BISULCATA Shumard (p. 310).
FIGS. 11 to 11c.	A slightly crushed specimen which has four indistinct plications in the sinus. Those on the fold can hardly be seen at all.
11.	Ventral view.
11a.	Anterior view in outline.
11b.	Dorsal view.
11c.	Side view in outline. "Dark limestone," Pine Spring (station 2930).
FIG. 12.	A distorted specimen in which the plications are rather sharp. Dorsal view. "Dark limestone,"? Pine Spring (station 2930).
	PUGNAX? BISULCATA var. SEMINULOIDES n. var. (p. 312).
FIGS. 13 to 13c.	A characteristic specimen.
13.	Dorsal view.
13a.	Side view in outline.
13b.	Ventral view.
13c.	Anterior view in outline. "Dark limestone," Pine Spring (station 2930).
FIGS. 14 to 14c.	A small specimen with a quadrate fold, partly preserved as an internal mold.
14.	Dorsal view.
14a.	Ventral view preserving some of the muscular impressions.
14b.	Anterior view in outline.
14c.	Side view in outline. "Dark limestone," Pine Spring (station 2930).
FIG. 15.	Posterior portion of a ventral valve referred to this variety with doubt. View of the interior. "Dark limestone," Pine Spring (station 2930).
FIG. 16.	A preparation showing the interiors of both valves, X 2. The low septum and crura of the dorsal valve are very plain, but the two small dental plates of the ventral valve are not well shown. View of the interior. "Dark limestone," Pine Spring (station 2930).
	PUGNAX SWALLOWIANA Shumard? (p. 314).
FIGS. 17 to 17b.	A specimen from the "dark limestone" provisionally referred to Shumard's species.
17.	Dorsal view.
17a.	Side view.
17b.	Anterior view. "Dark limestone," Pine Spring (station 2930).
FIGS. 18 to 18b.	A specimen of slightly different shape.
18.	Dorsal view.
18a.	Side view in outline.
18b.	Anterior view in outline. "Dark limestone," Pine Spring (station 2930).
FIG. 19.	An imperfect specimen probably belonging to the same species. View of the interior, X 3, slightly tilted backward and to one side. "Dark limestone," Pine Spring (station 2930).
	PUGNAX BIDENTATA n. sp. (p. 318).
FIGS. 20 to 20c.	A specimen referred with some doubt to this species. It may be only an aberra example of the foregoing.
20.	Dorsal view.
20a.	Side view in outline.
20b.	Ventral view.
20c.	Anterior view. "Dark limestone," Pine Spring (station 2930).
	PUGNAX PINGUIS n. sp. (p. 319).
FIGS. 21 to 21c.	A somewhat crushed example.
21.	Dorsal view.
21a.	Ventral view.
21b.	Anterior view.
21c.	Side view in outline. "Dark limestone," Pine Spring (station 2930).
	DIELASMINA GUADALUPENSIS n. sp. (p. 333).
FIGS. 22 and 22a.	An example apparently belonging to the same species that occurs in the Capitan.
22.	Dorsal view.
22a.	Anterior view. "Dark limestone," Pine Spring (station 2930).

DELAWARE MOUNTAIN FORMATION, GUADALUPE MOUNTAINS.

	ENTELETES sp. d (p. 299).
FIG. 23.	A specimen supposed to be a dorsal valve.
	Seen from above. Delaware Mountain formation, Guadalupe Point (station 2919).
	PRODUCTUS sp. a (p. 260).
FIGS. 24 to 24c.	A ventral valve.
24.	Posterior view.
24a.	Specimen seen from above.
24b.	Anterior view.
24c.	Side view. Delaware Mountain formation, Guadalupe Point (station 2919).
	PRODUCTUS TEXANUS n. sp. (p. 259).
FIGS. 25 to 25c.	A ventral valve.
25.	Specimen seen from above.
25a.	Side view.
25b.	Anterior view.
25c.	Posterior view. Delaware Mountain formation, Guadalupe Point (station 2903).
FIGS. 26 to 26b.	A dorsal valve referred to this species.
26.	Seen from above.
26a.	Side view in outline.
26b.	Anterior view. Delaware Mountain formation, Guadalupe Point (station 2903).
	PRODUCTUS WALCOTTIANUS n. sp. (p. 269).
FIGS. 27 to 27b.	A ventral valve.
27.	Seen from above.
27a.	Side view.
27b.	Posterior view. Delaware Mountain formation, Guadalupe Point (station 2903).
FIGS. 28 to 28b.	An imperfect specimen preserved as an internal mold. Though obtained from nearly the same horizon as the type, it is referred to the same species with doubt.
28.	Seen from above.
28a.	Posterior view.
28b.	Side view in outline. Delaware Mountain formation, Guadalupe Point (station 2931).

Plate XXI. (click on image for a PDF version)

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Last Updated: 05-Dec-2008