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Explaining the «anomalous» distribution of Echinodium Jur. (Bryopsida) : independent evolution in Macaronesia and Australasia

2008-10-31Journal article Open access
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dc.contributor.authorStech, Michael
dc.contributor.authorSim-Sim, Manuela
dc.contributor.authorEsquível, M. Glória
dc.contributor.authorFontinha, Susana
dc.contributor.authorTangney, Ray
dc.contributor.authorLobo, Carlos
dc.contributor.authorGabriel, Rosalina
dc.contributor.authorQuandt, Dietmar
dc.date.accessioned2013-03-18T17:00:39Z
dc.date.available2013-03-18T17:00:39Z
dc.date.issued2008-10-31
dc.descriptionCopyright © 2008 Gesellschaft für Biologische Systematik. Published by Elsevier GmbH.en
dc.description.abstractThe peculiar disjunction between Macaronesia and Australasia of the morphologically isolated pleurocarpous moss genus Echinodium is one of the most prominent questions in bryology. Echinodium as traditionally circumscribed comprises six extant species, four restricted to the Macaronesian archipelagos and two confined to the Australasian/Pacific regions. Molecular phylogenetic analyses based on plastid trnLUAA intron and nuclear ribosomal ITS sequences indicate that Echinodium is polyphyletic and split into three groups. Three of the four Macaronesian species (E. spinosum and the single island endemics E. renauldii and E. setigerum) are closely related to each other and treated as Echinodium s.str. (Echinodiaceae). Further clarification of the relationships of Echinodium s.str. with Orthostichella, a segregate of Lembophyllaceae, is needed. The remaining Macaronesian species, E. prolixum, is transferred to Isothecium (Lembophyllaceae); this systematic position is also strongly supported by leaf characters. The two Australasian species, E. hispidum and E. umbrosum, are molecularly unrelated to the Macaronesian species and are transferred to Thamnobryum in the Neckeraceae. While the molecular data suggest that the peculiar distribution pattern of ‘Echinodium’ is an artefact, the striking morphological similarity observed in Macaronesian and Australasian species cannot be dismissed. Possible explanations are: (i) parallel morphological evolution of the ‘Echinodium habit’ in Macaronesia and Australasia, or (ii) retention of a set of plesiomorphic characters in non-related groups in relict habitats, the Macaronesian laurel forest and the austral temperate rain forests, respectively. Of these hypotheses, the evolutionary parallelism hypothesis seems more plausible for several reasons, which are discussed.en
dc.identifier.citationStech, M., Sim-Sim, M., Esquível, G., Fontinha, S., Tangney, R., Lobo, C., Gabriel, R. & Quandt, D. (2008). Explaining the 'anomalous' distribution of Echinodium Jur. (Bryopsida): independent evolution in Macaronesia and Australasia. "Organisms Diversity and Evolution", 8: 282-292. http://dx.doi.org/10.1016/j.ode.2008.02.001.en
dc.identifier.issn1439-6092 (Print)
dc.identifier.issn1618-1077 (Online)
dc.identifier.urihttp://hdl.handle.net/10400.3/1690
dc.language.isoengpor
dc.peerreviewedyespor
dc.publisherElsevierGmbHpor
dc.relation.publisherversionhttp://dx.doi.org/10.1016/j.ode.2008.02.001por
dc.subjectBiogeographypen
dc.subjectEchinodiaceaepor
dc.subjectITSpor
dc.subjectMolecular Relationshipsen
dc.subjectPleurocarpous Mossesen
dc.subjecttrnLUAA intronpor
dc.titleExplaining the «anomalous» distribution of Echinodium Jur. (Bryopsida) : independent evolution in Macaronesia and Australasiapor
dc.typejournal article
dspace.entity.typePublication
oaire.citation.endPage292por
oaire.citation.issue(4)por
oaire.citation.startPage282por
oaire.citation.titleOrganisms Diversity and Evolutionen
oaire.citation.volume8por
rcaap.rightsopenAccesspor
rcaap.typearticlepor

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