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Abstract. Members of the genus Echinometru (Echinoideu: Echinometridue) inhabit hard substrata in shallow waters where they live in self-excavated dwellings. Boring by Echinometru spp. causes a secondary structure of the surface, thus forming additional microhabitats. In this study the effects of boring activities of Echinometru lucunter (L.) along the Caribbean coast of Colombia and of Echinometra vunbrunri A. Agassu in the Colombian Pacific is examined. Several species inhabit the boreholes occupied by these urchins. The associates live underneath the echinoid on the bottom of the borehole, where they find shelter from exposure and predators. The co-inhabitants of E. lucunter include the porcellanid Clusroroechus vunderhorsri (Schmitt ), the recently described brit-tlestar Ophiorhrix synoecim (Schoppe ), and the clingfish Acyrrus rubiginosus (Poey ). The species co-occumng with E. vunbrunti include the porcellanid crab Clusroroechus gorgonensis Werding amp; Haig and the clingfish Arcos decoris Briggs . With the exception of A. decoris, all of these species are obligatorily associated with the Echinomerra host. 相似文献
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