Cosmopolitan versus cryptic meiofaunal polychaete species: an approach to a molecular taxonomy

DC FieldValueLanguage
dc.contributor.authorWestheide, W
dc.contributor.authorSchmidt, H
dc.date.accessioned2021-12-23T15:58:28Z-
dc.date.available2021-12-23T15:58:28Z-
dc.date.issued2003
dc.identifier.issn1438387X
dc.identifier.urihttps://osnascholar.ub.uni-osnabrueck.de/handle/unios/3390-
dc.description.abstractPolychaete taxonomy is characterised by a high number of apparently cosmopolitan species. Detection of subtle but diagnostic ultrastructural differences and - in recent years - investigations at the molecular level have revealed that many of these ``species'' are actually complexes of morphologically identical or almost identical cryptic species. To disregard their existence would lead to an underestimation of global meiofauna diversity and undermine the value of many scientific studies. Therefore, we strongly recommend that they be given formal taxonomic recognition, beyond their published presentation as ``operational taxonomic units'', ``types'' or by alphabetic or numerical designators. Since there are neither generally accepted practical procedures nor any established consensus regarding the application of genetic data in taxonomy, we here provide examples of, and suggestions for, the treatment of meiofaunal species that are distinguished exclusively by molecular data, e.g. by genetic distance values, cluster analyses, diagnostic (= autapomorphic) DNA fragments from DNA fingerprinting procedures (RAPD) and/or DNA sequence differences (e.g. of ITS 2). Although no holotype material may be available because the molecular procedures require the preparation of entire specimens, practical taxonomic problems can be overcome and the recommendations of the Zoological Code of Nomenclature satisfied, by adopting the following procedures: (1) deposition of band-patterns of an individual obtained with the primers used to find diagnostic markers; (2) deposition of DNA in ethanol of one syntype individual; (3) deposition of fixed specimens (syntypes) from the locus typicus.
dc.language.isoen
dc.publisherBMC
dc.relation.ispartofHELGOLAND MARINE RESEARCH
dc.subjectAMPLIFIED POLYMORPHIC DNA
dc.subjectARBITRARY PRIMERS
dc.subjectCAPITELLA
dc.subjectcosmopolitanism
dc.subjectDIFFERENTIATION
dc.subjectHESIONIDAE
dc.subjectIDENTIFICATION
dc.subjectITS 22
dc.subjectMarine & Freshwater Biology
dc.subjectmeiofauna
dc.subjectOceanography
dc.subjectpolychaeta
dc.subjectPOPULATIONS
dc.subjectRAPD
dc.subjectRAPD-PCR
dc.subjectSYSTEMATICS
dc.titleCosmopolitan versus cryptic meiofaunal polychaete species: an approach to a molecular taxonomy
dc.typejournal article
dc.identifier.doi10.1007/s10152-002-0114-2
dc.identifier.isiISI:000182083900001
dc.description.volume57
dc.description.issue1
dc.description.startpage1
dc.description.endpage6
dc.identifier.eissn14383888
dc.publisher.placeCAMPUS, 4 CRINAN ST, LONDON N1 9XW, ENGLAND
dcterms.isPartOf.abbreviationHelgoland Mar. Res.
dcterms.oaStatusBronze
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