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22 results for “Endoxocrinus”
FIGURE 21 in Revision of the pentacrinid stalked crinoids of the genus Endoxocrinus (Echinodermata, Crinoidea), with a study of environmental control of characters and its consequences for taxonomy
FIGURE 21. Relative growth rate of the four Bahamian phenotypes of Endoxocrinus and Neocrinus decorus revealed by Sr content of columnals (from David 1998). White spots: proximal columnals; black spots: distal columnals.
FIGURE 24 in Revision of the pentacrinid stalked crinoids of the genus Endoxocrinus (Echinodermata, Crinoidea), with a study of environmental control of characters and its consequences for taxonomy
FIGURE 24. Allopatric and sympatric differentiation of Atlantic and Pacific phenotypes in the genus Endoxocrinus.
FIGURE 23 in Revision of the pentacrinid stalked crinoids of the genus Endoxocrinus (Echinodermata, Crinoidea), with a study of environmental control of characters and its consequences for taxonomy
FIGURE 23. Estimation of the morphological disparity between Atlantic and Pacific phenotypes of diplocrinine crinoids (from David 1998). Semiquantitative estimate accumulates distinctive characters (main traits in external morphology and facet characters of articulations).
FIGURE 22 in Revision of the pentacrinid stalked crinoids of the genus Endoxocrinus (Echinodermata, Crinoidea), with a study of environmental control of characters and its consequences for taxonomy
FIGURE 22. Decrease in size related to depth in Atlantic and Pacific diplocrinine crinoids. For the northeastern Atlantic (dotted line), the number of specimens is obtained by multiplying by 20 (from Roux 1976). For the Caribbean (100500 m), stalk diameters between 2.1 to 3.5 mm correspond to more frequent juvenile specimens.
FIGURE 18 in Revision of the pentacrinid stalked crinoids of the genus Endoxocrinus (Echinodermata, Crinoidea), with a study of environmental control of characters and its consequences for taxonomy
FIGURE 18. Heterochronic development of internodal symplexial facets in Endoxocrinus. Each columnal is from the distal stalk of different specimens of the parrae phenotype. (a) to (d): from a small juvenile to a large adult.
FIGURE 19 in Revision of the pentacrinid stalked crinoids of the genus Endoxocrinus (Echinodermata, Crinoidea), with a study of environmental control of characters and its consequences for taxonomy
FIGURE 19. Distal facet of nodals (cryptosymplexies) identifying the four species of Endoxocrinus. (a): E. (E.) parrae, (b): E. (D.) wyvillethomsoni, (c): E. (D.) alternicirrus, (d): E. (D.) maclearanus.
FIGURE 16 in Revision of the pentacrinid stalked crinoids of the genus Endoxocrinus (Echinodermata, Crinoidea), with a study of environmental control of characters and its consequences for taxonomy
FIGURE 16. Multivariate analysis (Principal Component Analysis) of western Atlantic and Pacific phenotypes (from David, 1998; David & Roux, 2000).
FIGURE 17 in Revision of the pentacrinid stalked crinoids of the genus Endoxocrinus (Echinodermata, Crinoidea), with a study of environmental control of characters and its consequences for taxonomy
FIGURE 17. The northeastern Atlantic phenotype wyvillethomsoni. Specimen from the Bay of Biscay collected by the Thalassa Cruise (see Roux, 1976).
FIGURE 15 in Revision of the pentacrinid stalked crinoids of the genus Endoxocrinus (Echinodermata, Crinoidea), with a study of environmental control of characters and its consequences for taxonomy
FIGURE 15. Differentiation of Pacific phenotypes through ontogeny of brachials. (a): same ontogenic trajectory of IIIBr, (b): divergence in IBr corresponding to an older stage of brachial ontogeny.
FIGURE 13. Pacific phenotypes. Specimens from New Caledonia. a and b in Revision of the pentacrinid stalked crinoids of the genus Endoxocrinus (Echinodermata, Crinoidea), with a study of environmental control of characters and its consequences for taxonomy
FIGURE 13. Pacific phenotypes. Specimens from New Caledonia. a and b: alternicirrus phenotype, a: specimen BC3, b: stalk of specimen TA20; c and d: sibogae phenotype, specimen BE8.
FIGURE 4 in Revision of the pentacrinid stalked crinoids of the genus Endoxocrinus (Echinodermata, Crinoidea), with a study of environmental control of characters and its consequences for taxonomy
FIGURE 4. The four phenotypes of diplocrinine crinoids in their environment off the Bahamas. (a): population of the minimus phenotype on the flank of a lithoherm (photo courtesy A. C. Neumann, Univ. North Carolina, taken from DSV Alvin), (b): one specimen of the prionodes phenotype between blocks at the Deep site, (c): a population of the parrae phenotype accompanied by a few Neocrinus decorus on the upcurrent slope of a large mound at the Middle Site, (d): one specimen of the parrae phenotype on a hardground slope at the Middle Site, (e): a population of the carolinae phenotype clinging to the overhanging edge of a block at the Deep Site, (f): three specimens of the phenotype carolinae attached to the side of a block at the Deep Site (photos bf taken from Johnson Sea Link by C. G. Messing).
FIGURE 12 in Revision of the pentacrinid stalked crinoids of the genus Endoxocrinus (Echinodermata, Crinoidea), with a study of environmental control of characters and its consequences for taxonomy
FIGURE 12. Variation in noditaxes of the phenotype parrae from the northwestern Atlantic showing local differences.
FIGURE 5 in Revision of the pentacrinid stalked crinoids of the genus Endoxocrinus (Echinodermata, Crinoidea), with a study of environmental control of characters and its consequences for taxonomy
FIGURE 5. External morphology of the four phenotypes living off the Bahamas. (a): carolinae phenotype, specimen 61 from Deep Site, (b): parrae phenotype, specimen 67 from Middle Site, (c): prionodes phenotype, specimen 99 from Lithoherm Site, (d): phenotype minimus, specimen 34 from Lithoherm Site.
FIGURE 3 in Revision of the pentacrinid stalked crinoids of the genus Endoxocrinus (Echinodermata, Crinoidea), with a study of environmental control of characters and its consequences for taxonomy
FIGURE 3. The five sites with pentacrinid crinoids studied off the Bahamas. Arrows indicate observed strong and weak current direction. (Shortterm flow reversals at the Middle Site and Lithoherms are not indicated).
FIGURE 2 in Revision of the pentacrinid stalked crinoids of the genus Endoxocrinus (Echinodermata, Crinoidea), with a study of environmental control of characters and its consequences for taxonomy
FIGURE 2. Location of sites off the northern Bahamas where pentacrinid crinoids were studied using the submersible JohnsonSeaLink.
FIGURE 8 in Revision of the pentacrinid stalked crinoids of the genus Endoxocrinus (Echinodermata, Crinoidea), with a study of environmental control of characters and its consequences for taxonomy
FIGURE 8. Comparison of stalk character variation in the two phenotypes carolinae and prionodes at Deep site. Grey area: usual overlap. Spots: value when one phenotype inhabits in the niche usually occupied by the other (prionodes on blocks or carolinae on flat hardground).
FIGURE 7 in Revision of the pentacrinid stalked crinoids of the genus Endoxocrinus (Echinodermata, Crinoidea), with a study of environmental control of characters and its consequences for taxonomy
FIGURE 7. Variation of the noditaxes in diplocrinine phenotypes at each Bahamian site. At Middle Site, Neocrinus decorus takes the place of the phenotype prionodes to filter laminar flow. When histograms overlap, grey corresponds to the total number of specimens for each class.
FIGURE 1 in Revision of the pentacrinid stalked crinoids of the genus Endoxocrinus (Echinodermata, Crinoidea), with a study of environmental control of characters and its consequences for taxonomy
FIGURE 1. Morphology of diplocrinine crinoids. General external morphology (a), and proximal portion of the stalk and crown showing isotomy (b) or endotomy (c) of arm branching. Facet of the symplexial articulation between columnals (d), and detailed portion of the heteromorphic stalk (e).
FIGURE 10 in Revision of the pentacrinid stalked crinoids of the genus Endoxocrinus (Echinodermata, Crinoidea), with a study of environmental control of characters and its consequences for taxonomy
FIGURE 10. Variation of crown characters in Bahamian phenotypes. (a): differentiation through ontogeny of carolinae and prionodes by decrease in the number of IIIBr, (b): decrease of pinnule length when arm number is greater than 40 in the phenotype parrae.
FIGURE 11 in Revision of the pentacrinid stalked crinoids of the genus Endoxocrinus (Echinodermata, Crinoidea), with a study of environmental control of characters and its consequences for taxonomy
FIGURE 11. Variation in noditaxes among phenotypes for Bahamian specimens (solid line) and for all the specimens of the three phenotypes collected in the Bahamas and other sites of western Atlantic (dotted line).
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