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www.earthlife.net/inverts/crinoidea.html
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This a standard dicyclic calyx as in the now extinct Inundata and the living Comatulida. In stalk is built up of the a series of disc shaped ossicles called columnals ...
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www.geol.umd.edu/~tholtz/G331/lectures/331echin2.html
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Dicyclic, but infrabasals are often small. Arms are distinctly differentiated from calyx, and brachial plates are not joined with those of calyx by firm articulations.
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recyt.fecyt.es/index.php/REP/article/view/8176/6381
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Description based mainly on the holotype: Dicyclic calyx, with a conical-globular longitudinal profile and approximate dimen- sions: height, 23 mm and maximum ...
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www.palaeontology.geo.uu.se/Kurser/Livets/echinodermata...
www.palaeontology.geo.uu.se/Kurser/Livets/echinodermata.pdf
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organized in stem, theka and brachia with ambulacra radials basals radials infrabasals monocyclic calyx dicyclic calyx basals radianal plate brachials brachia ...
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www.sci.sdsu.edu/plants/plantsystematics/plsylab15.doc
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Inflorescence type cyme of glomerules. Perianth fusion type homochlamydeous ( apetalous). Perianth cycly dicyclic. Calyx fusion aposepalous (synsepalous) ...
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skywalker.cochise.edu/wellerr/students/crinoids/Crinoid...
skywalker.cochise.edu/wellerr/students/crinoids/Crinoids.htm
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The three main parts of the crinoid are the stem, the calyx, and the arms. The ventral .... Crinoids, which have recognizable infrabasal plates, are called dicyclic .
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www.tandfonline.com/doi/abs/10.1080/00206816309473908
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from the Moscow region, are given below. SUBORDER POTERIOCRINITINA. JAECKEL, 1918. Family Rhabdocrinidae Ramsbottom, 1960. The calyx is dicyclic .
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www.jstor.org/stable/1301713
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dicyclic, inadunate, radial- bearing crinoid, the calyx of which is composed of four circlets of plates (infrabasals, basals, radials, and orals) and a radianal (text-fig ...
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paleo.cortland.edu/tutorial/Echinoderms/echinoderms2.ht...
paleo.cortland.edu/tutorial/Echinoderms/echinoderms2.htm
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Most crinoids consist of a calyx with arms supported by a stem. ... They can be dicyclic (having infrabasals) as in the example or monocyclic (without infrabasals ) ...
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