698


Journal of Paleontology 92(4):681–712


Figure 8. Species of Eretmocrinus from the Fort Payne Formation. (1, 2, 4, 7) Eretmocrinus ramulosus:(1, 2) lateral view and basal view of thecae, respectively of specimen, note spinose tegmen, anal sac plates, and relatively low calyx (USNM 639921); (4) lateral view of calyx, note somewhat higher calyx comparted to specimen illustrated in (1) (USNM 639922); (7) compressed theca from basal view, large specimens are typically crushed in the oral-aboral direction depicted here (USNM 639923). (3, 5, 6, 8, 9) Eretmocrinus spinosus:(3) basal view of calyx in matrix (USNM 639930); (5, 6) CD-interray lateral and basal views of a theca, respectively, note large, broad spines on all calyx plates and circular spines on tegmen (USNM 639928); (8, 9) basal and lateral views of a partial theca, this larger specimen has a higher calyx than the specimen in (5) (USNM 639929). Scale bars, as indicated.


Regular interrays not in contact with tegmen. First


interradial large, as high as wide, hexagonal; plating typically 1-2, but also 1-3 and 1-2-1; plating above first interradial may be equal. Plate sculpturing as noted above.


Primanal heptagonal, approximately as high as


wide, similar in size and sculpturing to radial plates; plating P-3-3-2-1 in only example known; not in contact with tegmen.


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