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Cuvierian tubules of the holothuroid Holothuria forskali (Echinodermata): a morphofunctional study
Quiescent Cuvierian tubules of Holothuria forskali (Delle Chiaje, 1823) have a pseudostratified mesothelium made of ciliated cells that cover elongated cells containing lipoproteie granules. TogetherExpand
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Description and significance of a peculiar intradigestive symbiosis between bacteria and a deposit-feeding echinoid
Abstract Individuals of the deposit-feeding echinoid Echinocardium cordatum (Pennant) harbour peculiar irregular to round-shaped nodules in their intestinal caecum. The nodules have a well-definedExpand
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Epithelial origin of starfish coelomocytes
THE various theories proposed to explain the origin of echinoderm coelomocytes can be classified into two groups, depending on whether they refer to a cytopoietic organ or tissue (TiedemannExpand
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Allometry of heavy metal bioconcentration in the echinoid Paracentrotus lividus
The relationships between concentration and size in Paracentrotus lividus were studied for seven metals (Zn, Pb, Cd, Fe, Cr, Cu, and Ti). In the calcified body compartment, Zn concentrations showedExpand
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Reproductive cycle of the spatangoid echinoid Echinocardium cordatum (Echinodermata) in the southwestern North Sea
Summary The reproductive cycle of the spatangoid echinoid Echinocardium cordatum is described from a 3-year survey of a population located in Wimereux (the southwest part of the North Sea). FromExpand
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Lecithotrophic development and metamorphosis in the Indo-West Pacific brittle star Ophiomastix venosa (Echinodermata: Ophiuroidea)
Summary The larval development of the ophiocomid ophiuroid Ophiomastix venosais described using SEM. The gastrula transforms into a uniformly ciliated early larva which progressively changes into aExpand
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Intraspecific variations of bioluminescence in a polychromatic population of Amphipholis squamata (Echinodermata : Ophiuroidea)
Six colour varieties were recognized in an intertidal population of Amphipholis squamata from Normandy (France). Each variety exhibits its own capacity to produce light, the light emitted by the mostExpand
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