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

Geological Survey Professional Paper 58

The Guadalupian Fauna

PLATES — PLATE XXIV.

BASAL BLACK LIMESTONE, GUADALUPE MOUNTAINS.

	ANTHRACOSYCON FICUS n. sp. (p. 72).
FIGS. 1 and 1a.	The type specimen.
1.	Side view.
1a.	View of the upper surface.
	Basal black limestone, Guadalupe Point (station 2920).
FIG. 2.	Portion of a fragmentary specimen showing the spicular structure more clearly than the type, X 10. Basal black limestone, Guadalupe Point (station 2920).
	STENOPORA GRANULOSA n. sp.? (p. 129).
FIGS. 3 to 3c.	A specimen doubtfully referred to this species.
3.	Transverse section, X 20.
3a.	Portion of same more highly magnified, showing the concentrically constructed acanthopores, and the granular band through the median portion of the walls, X 35.
3b.	Portion of same somewhat more highly magnified to show the structure of the walls, X 40.
3c.	Longitudinal section, X 20. Basal black limestone, Guadalupe Point (station 2967).
	ENTELETES sp. c (p. 297).
FIGS. 4 and 4a.	A rather large dorsal valve in which the plication is still indistinct.
4.	Seen from above.
4a.	Seen from the side. Basal black limestone, Guadalupe Point (station 2920).
FIGS. 5 and 5a.	A small dorsal valve showing incipient plications.
5.	Seen from above, X 2.
5a.	Same, natural size. Basal black limestone, Guadalupe Point (station 2920).
	MEEKELLA MULTILIRATA n. sp. (p. 208).
FIGS. 6 to 6b.	A decorticated ventral valve.
6.	Seen from above.
6a.	Side view.
6b.	Posterior view. Basal black limestone, Guadalupe Point (station 2967).
	MEEKELLA ATTENUATA n. sp. (p. 205).
FIG. 7.	All imperfect dorsal valve.
	Seen from above. Basal black limestone, Guadalupe Point (station 2967).
FIGS. 8 and 8a.	A young ventral valve in which the plications have just begun to develop.
8.	Seen from above.
8a.	Side view in outline. Basal black limestone, Guadalupe Point (station 2967).
FIGS. 9 and 9a.	A larger ventral valve with more angular plications somewhat more early developed.
9.	Seen from above.
9a.	Side view in outline. Basal black limestone, Guadalupe Point (station 2967).
	RICHTHOFENIA PERMIANA Shumard (p. 283).
FIGS. 10 and 10a.	A very young example referred to this species.
10.	Seen from below, showing the cystose structure when exfoliated, X 3.
10a.	Posterior view, X 3. The sinus in the outline of the shell looks less like a break in the original than in the figure, and is probably very nearly the actual margin, as indicated by growth lines. Basal black limestone, Guadalupe Point (station 2967).
	COMPOSITA MEXICANA var. GUADALUPENSIS n. var. (p. 390).
FIGS. 11 to 11c.	A specimen of the usual size and character.
11.	Dorsal view.
11a.	Ventral view.
11b.	Side view in outline.
11c.	Anterior view. Basal black limestone, Guadalupe Point (station 2920).
FIGS. 12 to 12b.	A small specimen similar to the last.
12.	Dorsal view.
12a.	Side view in outline.
12b.	Front view in outline. Basal black limestone, Guadalupe Point (station 2920).
FIGS. 13 to 13b.	A large, not very characteristic specimen.
13.	Dorsal view.
13a.	Side view in outline.
13b.	Front view in outline. Basal black limestone, Guadalupe Point (station 2920).
	HUSTEDIA MEEKANA Shumard (p. 394).
FIGS. 14 and 14a.	A narrow variety, rather characteristic of this horizon.
14.	Ventral view.
14a.	Side view. Basal black limestone, Guadalupe Point (station 2920).
	PUGNAX NITIDA n. sp. (p. 313).
FIGS. 15 to 15c.	The type specimen.
15.	Dorsal view.
15a.	Side view in outline.
15b.	Ventral view.
15c.	Anterior view. Basal black limestone, Guadalupe Point (station 2920).
	PUGNAX OSAGENSIS Swallow (p. 317).
FIGS. 16 to 16b.	The type from the black limestone referred to this species.
16.	Dorsal view.
16a.	Anterior view.
16b.	Side view. Basal black limestone, Guadalupe Point (station 2920).
	PUGNAX BIDENTATA n. sp. (p. 318).
FIGS. 17 to 17c.	The typical specimen.
17.	Dorsal view.
17a.	Side view.
17b.	Ventral view.
17c.	Front view. Basal black limestone, Guadalupe Point (station 2920).
	PUGNAX? PUSILLA n. sp. (p. 319).
FIGS. 18 to 18b.	The type specimen.
18.	Dorsal view, X 3.
18a.	Side view in outline, X 3.
18b.	Anterior view, X 3. Basal black limestone, Guadalupe Point (station 2967).
	LOXONEMA? INCONSPICUUM n. sp. (p. 486).
FIG. 19.	The type specimen. Side view, X 5. Basal black limestone, Guadalupe Point (station 2967).
	MACROCHEILINA? MODESTA n. sp. (p. 489).
FIG. 20.	The type specimen. Side view, X 5. Basal black limestone, Guadalupe Point (station 2967).
	PLEUROTOMARIA STRIGILLATA n. sp. (p. 471).
FIGS. 21 and 21a.	The typical specimen, the upper portion more or less restored from a second specimen.
21.	Side view.
21a.	Lower whorl enlarged to show sculpture, X 3. Basal black limestone, Guadalupe Point (station 2920).
	NUCULA sp. a (p. 421).
FIG. 22.	A left valve whose proportional height is above the average. Side view, X 2. Basal black limestone, Guadalupe Point (station 2967).
	ANISOPYGE? ANTIQUA n. sp. (p. 509).
FIGS. 23 and 23a.	A large but imperfect pygidium.
23.	Seen from above, X 2.
23a.	Side view, X 2. Basal black limestone, Guadalupe Point (Station 2967).
FIGS. 24 and 24a.	A medium-sized pygidium.
24.	Seen from above, X 2.
24a.	Side view, X 2. Basal black limestone, Guadalupe Point (station 2967).
FIG. 25.	A small, imperfect pygidium. Seen from above, X 2. Basal black limestone, Guadalupe Point (station 2967).
FIG. 26.	Fragment of a cranidium. Seen from above, X 2. Basal black limestone, Guadalupe Point (station 2967).

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

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Last Updated: 05-Dec-2008