Fig. 5
From: The isocrinine crinoid Isselicrinus Rovereto from the Paleogene of the Americas
Isselicrinus sp. A, pluricolumnals, upper Eocene of Tierra del Fuego. a–c Show articular facets; d–i show lateral views of heteromorphic pluricolumnals. a, d RGM.1332404. a Nodal articular facet with three cirrus scars, angled to column long axis, and at 2, 5 and 10 o’clock. d Pluricolumnal (proxistele) with strong grooves (sutures?) between lobes; nodal at top; column displaced near bottom. b, f RGM.1332406. b Articular facet of internodal. f Proxistele. c, g RGM.1332409. c Articular facet of internodal. g Proxistele. e RGM.1332407, proxistele. h RGM.1332408, dististele. i RGM.1332405, dististele. Specimens uncoated. All scale bars represent 10 mm