. Early Llandovery crinoids and stelleroids from the Cataract Group (Lower Silurian) in southern Ontario, Canada. Crinoidea, Fossil; Starfishes, Fossil; Paleontology; Paleontology. Subclass Inadunata Wachsmuth and Springer, 1885 Order Disparida Moore and Laudon, 1943 Superfamily Calceocrinacea Meek and Worthen, 1869 Family Calceocrinidae Meek and Worthen, 1869 Genus Calceocrinus Hall, 1852 TYPE SPECIES By designation of Wachsmuth and Springer 1886:205; Cheirocrinus chrysalis Hall, 1860. DIAGNOSIS Genus of Calceocrinidae with bilaterally symmetrical crown and weakly developed main axil series.
. Early Llandovery crinoids and stelleroids from the Cataract Group (Lower Silurian) in southern Ontario, Canada. Crinoidea, Fossil; Starfishes, Fossil; Paleontology; Paleontology. Subclass Inadunata Wachsmuth and Springer, 1885 Order Disparida Moore and Laudon, 1943 Superfamily Calceocrinacea Meek and Worthen, 1869 Family Calceocrinidae Meek and Worthen, 1869 Genus Calceocrinus Hall, 1852 TYPE SPECIES By designation of Wachsmuth and Springer 1886:205; Cheirocrinus chrysalis Hall, 1860. DIAGNOSIS Genus of Calceocrinidae with bilaterally symmetrical crown and weakly developed main axil series. Basals four. E-ray inferradial and superradial generally in narrow contact. B- and C-ray inferradials present, separated adanally by subanal. A- and D-ray radials large, undi- vided, supporting axil series. Arms three; main axils relatively few and intercalated with nonaxillary plates, giving off unbranched ramules at intervals in typical. Text-fig. 9 Calceocrinus pustulosus Brower. A-ray view of holotypc ROM628c1, PI. 4, fig. 12. Radials black. Scale 5 mm. calceocrinid pattern. Median (E-ray) arm generally branched dichotomously but may be unbranched. KNOWN RANGE AND DISTRIBUTION Middle Ordovician to Upper Silurian, in North America and Europe. Calceocrinus pustulosus Brower, 1966 Text-fig. 9; PI. 4, fig. 12 Calceocrinus pustulosus Brower, 1966:627-628, text-fig. 2c; pi. 75, fig. 13. DIAGNOSIS A species of Calceocrinus characterized by wide aboral cup, three main axils, strongly developed heterotomy of axil arms, and branched E-ray arm. DISCUSSION Calceocrinus pustulosus is known only from the holotype (ROM 628cl). The writer collected several calceocrinids at the type locality, but none appear to be conspecific withC. pustulosus. OCCURRENCE Manitoulin Formation at Devil's Punch Bowl near Stoney Creek, Ontario. Calceocrinus tridactylus sp. no v. Text-fig. lOA-C; PI. 4, figs. 5-9 TYPE MATERIAL Three specimens were available for study: holotype ROM 39007, paratype figured ROM 39
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