Revision of Paleozoic Stelleroidea

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Eraza Collection / Alamy Stock Photo

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2HD02JC

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1081 x 1850 px | 18.3 x 31.3 cm | 7.2 x 12.3 inches | 150dpi

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RMKAACEH–Revision of Paleozoic Stelleroidea BHL17072729

RM2HD02GY–Revision of Paleozoic Stelleroidea

RMRG87JN–. Bulletin - United States National Museum. Science. REVISION OF PALEOZOIC STELLEROIDEA. 225 Original description.—'' (Order Ophiuridae. Family Euryales.) Body circular, covered with squamiform plates; genital openings in the angles of junction of the arms beneath; arms (simple) formed of alternating ossicula." Oenoholotype.—''Species Unica. Protaster sedgwickii. Forbes." Original description of P. sedgwiclii.—''The disk is circular, and shaped like that of an Ophiura. The arms are five in number, very narrow, equidistant, and sunilar. "The upper and under surfaces of the disk w

RMKAACED–Revision of Paleozoic Stelleroidea BHL17072721

RM2HD02H0–Revision of Paleozoic Stelleroidea

RMRG87D1–. Bulletin - United States National Museum. Science. REVISION OF PALEOZOIC STELLEROIDEA. 269 Genoholotyi^e.—O.Jlexilis Mook and Worthcn. For generic description, see imder O.Jlexilis. RemarTcs hy Gregory.--"This interesting genus has hitherto been placed among the Eiiryalida3, of which it has been regarded as the best known fossil representative. As Prof. Bell, however, lias remarked, Meek and Worthen's clear figures of the vertebral ossicles show that the articular surfaces are StreptospondyluK^ and not Cladophiuroid." Schoudorf in 1909 restudied Onycliaster in detail, and came to t

RMKAACEY–Revision of Paleozoic Stelleroidea BHL17072747

RM2HD02H9–Revision of Paleozoic Stelleroidea

RMRG87KR–. Bulletin - United States National Museum. Science. REVISION OF PALEOZOIC STELLEROIDEA. 223 Genus BOHEMURA Jaekel. Text fig. 21. Bohemura Jaekel, Zeits. geol. GeselL, vol. 55, 1903, Protokol, p. ]8 (111), fig. 6. This genus, like tlie foregoing, is not defined in the regulation way. Jaekel's fine drawing shows that it is closely related to EopMura, differing mainly in that the rays do not end hluntly, but have slowly tapermg whip-like terminations. These ends are of coui-se ontoge- netically young and reveal the progressive ray development. Here. FiQ. 20.—Oral skeleton of Eophiura bohemica, a

RMKAACEC–Revision of Paleozoic Stelleroidea BHL17072719

RM2HD02J5–Revision of Paleozoic Stelleroidea

RMRG87X1–. Bulletin - United States National Museum. Science. REVISION OF PALEOZOIC STELLEROIDEA. 91 MESOPAL-EASTER BELLULUS (Billings). Text fig. 7. Petraster bellulus Billings, Geol. Surv. Canada, Pal. Foss., vol. 1, 1865, p. 393, fig. 368.—Miller, N. Amer. Geol. Pal., 1889, p. 269, fig. 389. Original description.—-"Deepl}' stellate, about 18 lines across; disk 5 lines wide; width of rays, at the base, half the width of the disk, uniformly tapering to their extremities; ambulacral grooves, narrow and deep, with about 30 adambulacral plates on each side. These plates are strongly convex and nearl

RMKAACEX–Revision of Paleozoic Stelleroidea BHL17072743

Revision of Paleozoic Stelleroidea

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