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8 results for “Cambraster”
Fig. 8 in Morphology and ontogeny of the Cambrian edrioasteroid echinoderm Cambraster cannati from western Gondwana
Fig. 8. Ontogenetic development of marginal ring and ambulacral tips in edrioasteroid echinoderm Cambraster cannati Miquel (1894) from early juveniles (A), late juveniles (B), and adult (C) specimens. The three photographs represent ambulacrum E.
Fig. 7 in Morphology and ontogeny of the Cambrian edrioasteroid echinoderm Cambraster cannati from western Gondwana
Fig. 7. Ontogenetic development of edrioasteroid echinoderm Cambraster cannati (Miquel, 1894). Note the similarity in the aboral plating between the most juvenile specimen of C. cannati and larger specimens of Cambraster tastudorum Jell, Burrett, and Banks, 1985.
Fig. 5 in Morphology and ontogeny of the Cambrian edrioasteroid echinoderm Cambraster cannati from western Gondwana
Fig. 5. Camera lucida drawing of oral frame in edrioasteroid echinoderm Cambraster cannati (Miquel, 1894); specimen MPZ2011/104. A–E. Ambulacral designation.
Fig. 4 in Morphology and ontogeny of the Cambrian edrioasteroid echinoderm Cambraster cannati from western Gondwana
Fig. 4. Edrioasteroid echinoderm Cambraster cannati (Miquel, 1894) from the middle Cambrian of Borobia Formation (Spain) and Coulouma Formation (France). A. MNHN.F.A45786B, oral (A1) and aboral (A2) views of a complete adult specimen, detail of ambulacrum E showing the disposition of flooring plates (A3). Note the position of the circular apertures for the water vascular system and the pits for cover plates articulation. B. MPZ2011/105, adoral view of a teratological specimen in which the ambulacrum E extends within a single marginal plate. C. MNHN.F.A45788, nearly complete specimen with Ą
Fig. 3 in Morphology and ontogeny of the Cambrian edrioasteroid echinoderm Cambraster cannati from western Gondwana
Fig. 3. Edrioasteroid echinoderm Cambraster cannati (Miquel, 1894) from the middle Cambrian of Borobia Formation (Spain) and Coulouma Formation (France). A. MPZ2011/101, complete adult specimen with a slightly distorted interambulacrum CD (A1), detail of ambulacrum B (A2), note the flooring plates with some cover plates articulated on them. Where cover plates are absent, ligamentary pits are identifiable. Detail of periproct and peripheral skirt bordering the marginal plates (A3). B. MPZ2011/102, detail of contact between two marginal plates with invaginated borders to accommodate the ambulacral tip. C. MNHN.F.A45785, aboral view of an early juvenile with only few circlets of plates developed. D. MPZ2011/103, oral (D1) and aboral (D2) views of a juvenile that show a continuous marginal ring. E. MPZ2011/96, aboral view of an advanced juvenile. F. MPZ2009/1232a, b, oral (F1) and aboral (F2) views of an early adult specimen with marked pentameral shape; note impression of thicker ambulacra in F2, oral frame plates, and possible hydropore showing though aboral plating. Detail of oral area, in which interradial oral plates are clearly visible (F3). G. MPZ2011/104, oral view of a nearly complete specimen showing a nearly complete oral area. General view showing the oral area (G1); detail of the oral area with the arrangement of interradial oral elements (G2). Abbreviations: cp, cover plates; fm, peristomial frame plate; fp, flooring plates; m. Marginal plates; pe, periproct; ps, peripheral skirt. 1–5, peristomial frame plates. All specimens are photographs taken from latex casts whitened with NH4Cl sublimate. Scale bars 2 mm.
Fig. 1 in Morphology and ontogeny of the Cambrian edrioasteroid echinoderm Cambraster cannati from western Gondwana
Fig. 1. Geological setting with indication of the studied localities. A. Map of Spain and France with the position of the Iberian Chains and Montagne Noire. B. Geological map of the Iberian Chains with indication of localities where specimens of Cambraster have been collected. C. Geological map of Montagne Noire (France) with indication of localities where specimens of Cambraster have been collected.
Fig. 2 in Morphology and ontogeny of the Cambrian edrioasteroid echinoderm Cambraster cannati from western Gondwana
Fig. 2. Large mature specimen of Cambrian edrioasteroid echinoderm Cambraster cannati (Miquel, 1894). A. Oral view showing peristomial frame plates around central mouth, reconstructed oral and ambulacral cover plates, long straight ambulacra indenting large plates of marginal ring, interambulacral areas with small epispire−bearing plates, and peripheral skirt of tiny plates. B. Aboral view showing fully plated aboral surface composed of smaller−plated peripheral region lacking marginal ring surrounding larger−plated central region.
Fig. 6 in Morphology and ontogeny of the Cambrian edrioasteroid echinoderm Cambraster cannati from western Gondwana
Fig. 6. Edrioasteroid echinoderm Cambraster tastudorum Jell, Burrett, and Banks, 1985 from the Cambrian Cateena Group, Australia. A. NMVP107063B, oral view of a complete specimen. B. NMVP107061, oral view of a complete specimen. C. NMVP107060, oral view of a nearly complete specimen showing the peristome bounded by interradial plates (mfp), flooring plates (fp), and apertures for the water vascular system (p). General view (C1) and detail of the oral plating showing the interradial elements constructing the mouth frame (C2). D, E. Aboral view of two specimens showing the plating pattern with large radial elements (rap). NMVP107068 (D) and NMVP107063A (E). Scale bars 2 mm.
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