Por favor, use este identificador para citar o enlazar a este item: http://hdl.handle.net/10261/43747
COMPARTIR / EXPORTAR:
logo share SHARE logo core CORE BASE
Visualizar otros formatos: MARC | Dublin Core | RDF | ORE | MODS | METS | DIDL | DATACITE

Invitar a revisión por pares abierta
Campo DC Valor Lengua/Idioma
dc.contributor.authorUriz, María Jesús-
dc.contributor.authorMaldonado, Manuel-
dc.date.accessioned2011-12-27T11:19:55Z-
dc.date.available2011-12-27T11:19:55Z-
dc.date.issued1995-
dc.identifier.citationBiological Journal of the Linnean Society 55 : 1-16 (1995)es_ES
dc.identifier.issn0024-4066-
dc.identifier.urihttp://hdl.handle.net/10261/43747-
dc.description15 páginas y 7 figuras.es_ES
dc.description.abstractThe relationships between different spicule lineages of Demospongae are revised through the ontogenetic study of the main spicules of the genera Crambe and Discorhabdella. The presence of terminal orifices in the basal spines of the asterose acanthostyles of Discorhabdella, and the actines of the desmas of Crambe have been shown by examining young spicules under high magnification. Thus, the polyaxonid origin of both spicule types is hereby supported by the ontogenetic information, and their homology is also supported by their equivalent arrangement in the skeleton. The current differences in shape between both spicule types are considered the result of a divergent morphological evolution from an ancestral polyactinal corpuscle, by the atrophyihypertrophy of a different number of actines. Arguments are also presented to support the homology of these two spicule types with the sphaeroclons of Vetulina, and other fossil genera. Moreover, the presence of axial canals inside the tubercles of the tuberose tylostyles of Discorhabdella and Crambe tuberosa indicates that the tubercles are actually atrophied actines as in the case of the hadromerid genus Terpios. According to the ontogeny, the tuberose morphology of these spicules may correspond to the retention of an ancestral characteristic in the Poecilosclerida and Hadromerida; in this case, a monophyletic origin, is suggested between both taxa. From the overall results here presented, the tetraxonid spicule, presently considered by most authors as the primitive morphotype, as well as some monaxons, could be considered as evolving from a polyaxial form.es_ES
dc.description.sponsorshipResearch was partially sponsored by projects CEE MAS2 CT91-004 (Marine Sciences and Technologies, MAST-11), CICYT MAR9 1-0528, PB89-008 1 (Marine Resources and Aquaculture National Program), CICYT PB89-008 1, and a ‘Generalitat de Catalunya’ fellowship to M. Maldonado.es_ES
dc.language.isoenges_ES
dc.publisherWiley-Blackwelles_ES
dc.rightsclosedAccesses_ES
dc.subjectEvolutiones_ES
dc.subjectPolyaxonid spiculeses_ES
dc.subjectDemospongeses_ES
dc.titleA reconsideration of the relationship between polyaxonid and monaxonid spicules in Demospongiae: new data from the genera Crambe and Discorhabdella (Porifera)es_ES
dc.typeartículoes_ES
dc.identifier.doi10.1111/j.1095-8312.1995.tb01046.x-
dc.description.peerreviewedPeer reviewedes_ES
dc.relation.publisherversionhttp://dx.doi.org/10.1111/j.1095-8312.1995.tb01046.xes_ES
dc.type.coarhttp://purl.org/coar/resource_type/c_6501es_ES
item.openairetypeartículo-
item.cerifentitytypePublications-
item.languageiso639-1en-
item.grantfulltextnone-
item.openairecristypehttp://purl.org/coar/resource_type/c_18cf-
item.fulltextNo Fulltext-
Aparece en las colecciones: (CEAB) Artículos
Show simple item record

CORE Recommender

Page view(s)

398
checked on 28-mar-2024

Google ScholarTM

Check

Altmetric

Altmetric


NOTA: Los ítems de Digital.CSIC están protegidos por copyright, con todos los derechos reservados, a menos que se indique lo contrario.