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Showing 1 to 10 of 10 for “"echinoids"”.
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The Morphology, Systematics, and Biology of The Entocommensal Ciliates Of Echinoids
Made available in DSpace on 2014-12-10T18:13:23Z (GMT). No. of bitstreams: 1 6500781.pdf: 19551932 bytes, checksum: f904c151690454afb105a1426f25c1aa (MD5) Previous issue date: 1964
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The echinoid Parechinus angulosus and its association with other invertebrates
Echinoids are recognized as important components of temperate kelp forests because of the impact that they have by grazing. The provision of shelter by some echinoid species for both juvenile conspecifics and for other species of echinoids has been widely documented. The behaviour is thought to be …
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A study of the infestations occurring in Parechinus Angulosus
… ciliate infestation of the alimentary tract of echinoids has been steadily growing. Work has been done on sea urchins from Bermuda, Tortugas, the east and west coasts of Japan, the coast of North Carolina; the coast of California, the Mediterranean Sea. and the North Sea. The present paper deals …
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The Trophic Ecology of Psammechinus miliaris in Scottish Sea Lochs
… ecosystem functioning and as such regular echinoids have been termed keystone through the action of their grazing. Much research has focused on this group’s action as herbivores, but as a group omnivory is common. The aim of this study was to investigate the trophic ecology of the locally …
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Palaeoecology and taxonomy of the macrobenthic fauna from the Upper Cretaceous Ajlun Group, southern Jordan
… taxa, 77 of which are bivalves, 22 gastropods, 9 echinoids, and 4 corals. The phyla Porifera, Bryozoa, and Brachiopoda are represented by 1 species each. Additionally, at least two species of decapod crustaceans were found. One bivalve species is new: Anthonya jordanica from Cenomanian claystones …
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Systematics and biodiversity of South African sea urchins
… and distribution patterns of South African echinoids and to provide a user-friendly, well-illustrated guide to the group. Dry and wet specimens, particularly those within the extensive collections of the Iziko South African Museum, were morphologically examined and identified, and the …
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Towards Deep-Sea Toxicology: Experimental Approaches With Echinoderms
… was used to assess the responses of the echinoids to<br/>contaminant exposure. Compared with the significant cytological and molecular (assess via qPCR)<br/>responses in P. miliaris, a reduced capacity to respond to contaminant exposure was found in B.<br/>lyrifera at these levels of …
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THE FUNCTIONAL ROLE OF ASTERIAS VULGARIS VERRILL (1866) IN THREE SUBTIDAL COMMUNITIES
… ectoprocts to hydroids to small gastropods to echinoids . . . to bivalves for the largest individuals). The communities at 8 m and 30 m contain a variety of prey that are utilized, and normally distributed population structures of asteroids are found. The middle community at 18 m is anomalous …
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Taphonomy and Palaeoecology of multi-element skeleton invertebrates: a genetic model for exceptional preservation
… skeleton invertebrates, such as arthropods and echinoids, were studied. The first case studied concerns the Ordovician trilobite-like arthropod Tariccoia arrusensis, which is found locally within the grey siltstones of Riu Is Arrus Member (Monte Argentu Formation, Upper Ordovician), cropping out …
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Post-larval development in deep-sea echinoderms
… development of three deep-sea spatangoid echinoids is very similar, but the morphology and formation of fascioles facilitate the distinction of the species examined. Whereas in Hemiaster expergitus and Spatangus raschi the fascioles present in the post-larvae develop to form the adult …