FRINK Linked Data Fragments server

Matches in SemOpenAlex for { <https://semopenalex.org/work/W2012333909> ?p ?o ?g. }

• W2012333909 endingPage "15" @default.
• W2012333909 startingPage "1" @default.
• W2012333909 abstract "The phylogenetic systematics of the polychaetes, i.e. the non-clitellate annelids, depend on which characters are regarded as belonging to the bauplan of the annelid stem species. The main competition is between two diametrically opposed hypotheses: the stem species was either (1) an errant, epibenthic organism with well-developed prostomium and prostomial appendages (antennae and palps), many homonomous segments, biramous and well differentiated parapodia, and numerous well-structured chaetae, or (2) a burrowing organism with small prostomium lacking appendages, which had many homonomous segments without parapodia, and only a few simple chaetae. (A third hypothesis, which is based primarily on certain morphological peculiarities and the presence of exclusively monociliary cells in Owenia, and which postulates a sessile stem species, is mentioned only peripherally for the present.) From a decision in favour of Hypothesis 2 it would follow that the Clitellata should be considered the most primitive annelids, so that the possession of parapodia and many extremely differentiated chaetae, for instance, would be interpreted as a highly derived character state. The consequence for the phylogenetic systematics of the Polychaeta is that oligochaete-like taxa would have to be considered more primitive than, for example, nereidid-like taxa. On the basis of Hypothesis 1, the evolution of these structures would have proceeded in the opposite direction, and polychaete systematics would have the reverse arrangement. The most important evidence for Hypothesis 2 comes from functional morphological considerations; namely the inference that metamerism has arisen from a burrowing mode of life. It is shown here that (1) this hypothesis rests partly on ignorance of the close relationship between reproductive biology and morphology in the clitellates, (2) the notion that metamerism, and hence the stem species of the Articulata, originated from a burrowing life in the marine environment is unconvincing, and (3) the origin of metamerism can be explained quite differently with reference to modern ultrastructural findings. According to these findings, septa, which are the fundamental structural elements for annelid segmentation, evolved as a morphological pre-requisite for the development of transversely running blood vessels; other purposes of septa (e.g. subdivision of the hydrostatic skeleton), therefore, have to be regarded as secondary. A highly complex blood vascular system may have been the consequence of the development of lateral parapodia-like appendages. Thus, parapodia are assumed to be part of the ground pattern of the Articulata and hence were present in the stem species of the Annelida. This is consistent with the traditional interpretation of annelid systematics, which places the errant polychaete taxa at the base of the system (Hypothesis 1)." @default.
• W2012333909 created "2016-06-24" @default.
• W2012333909 creator A5005358764 @default.
• W2012333909 date "1997-01-01" @default.
• W2012333909 modified "2023-10-15" @default.
• W2012333909 title "The direction of evolution within the Polychaeta" @default.
• W2012333909 cites W1971860067 @default.
• W2012333909 cites W1993833472 @default.
• W2012333909 cites W2001586405 @default.
• W2012333909 cites W2002048099 @default.
• W2012333909 cites W2006577783 @default.
• W2012333909 cites W2008286391 @default.
• W2012333909 cites W2013781239 @default.
• W2012333909 cites W2014139715 @default.
• W2012333909 cites W2038847349 @default.
• W2012333909 cites W2047020469 @default.
• W2012333909 cites W2060155330 @default.
• W2012333909 cites W2065381278 @default.
• W2012333909 cites W2066958903 @default.
• W2012333909 cites W2067531729 @default.
• W2012333909 cites W2072981005 @default.
• W2012333909 cites W2082162039 @default.
• W2012333909 cites W2103306057 @default.
• W2012333909 cites W2124636347 @default.
• W2012333909 cites W2285142747 @default.
• W2012333909 cites W2896222415 @default.
• W2012333909 cites W2914282231 @default.
• W2012333909 cites W4246944887 @default.
• W2012333909 cites W78081600 @default.
• W2012333909 doi "https://doi.org/10.1080/00222939700770011" @default.
• W2012333909 hasPublicationYear "1997" @default.
• W2012333909 type Work @default.
• W2012333909 sameAs 2012333909 @default.
• W2012333909 citedByCount "181" @default.
• W2012333909 countsByYear W20123339092012 @default.
• W2012333909 countsByYear W20123339092013 @default.
• W2012333909 countsByYear W20123339092014 @default.
• W2012333909 countsByYear W20123339092015 @default.
• W2012333909 countsByYear W20123339092016 @default.
• W2012333909 countsByYear W20123339092017 @default.
• W2012333909 countsByYear W20123339092018 @default.
• W2012333909 countsByYear W20123339092019 @default.
• W2012333909 countsByYear W20123339092020 @default.
• W2012333909 countsByYear W20123339092021 @default.
• W2012333909 countsByYear W20123339092022 @default.
• W2012333909 countsByYear W20123339092023 @default.
• W2012333909 crossrefType "journal-article" @default.
• W2012333909 hasAuthorship W2012333909A5005358764 @default.
• W2012333909 hasConcept C114669353 @default.
• W2012333909 hasConcept C148737382 @default.
• W2012333909 hasConcept C18903297 @default.
• W2012333909 hasConcept C196843134 @default.
• W2012333909 hasConcept C2777343278 @default.
• W2012333909 hasConcept C2778315969 @default.
• W2012333909 hasConcept C2781123465 @default.
• W2012333909 hasConcept C41451933 @default.
• W2012333909 hasConcept C41806617 @default.
• W2012333909 hasConcept C58642233 @default.
• W2012333909 hasConcept C71640776 @default.
• W2012333909 hasConcept C78458016 @default.
• W2012333909 hasConcept C86803240 @default.
• W2012333909 hasConcept C90856448 @default.
• W2012333909 hasConcept C95444343 @default.
• W2012333909 hasConceptScore W2012333909C114669353 @default.
• W2012333909 hasConceptScore W2012333909C148737382 @default.
• W2012333909 hasConceptScore W2012333909C18903297 @default.
• W2012333909 hasConceptScore W2012333909C196843134 @default.
• W2012333909 hasConceptScore W2012333909C2777343278 @default.
• W2012333909 hasConceptScore W2012333909C2778315969 @default.
• W2012333909 hasConceptScore W2012333909C2781123465 @default.
• W2012333909 hasConceptScore W2012333909C41451933 @default.
• W2012333909 hasConceptScore W2012333909C41806617 @default.
• W2012333909 hasConceptScore W2012333909C58642233 @default.
• W2012333909 hasConceptScore W2012333909C71640776 @default.
• W2012333909 hasConceptScore W2012333909C78458016 @default.
• W2012333909 hasConceptScore W2012333909C86803240 @default.
• W2012333909 hasConceptScore W2012333909C90856448 @default.
• W2012333909 hasConceptScore W2012333909C95444343 @default.
• W2012333909 hasIssue "1" @default.
• W2012333909 hasLocation W20123339091 @default.
• W2012333909 hasOpenAccess W2012333909 @default.
• W2012333909 hasPrimaryLocation W20123339091 @default.
• W2012333909 hasRelatedWork W1542788662 @default.
• W2012333909 hasRelatedWork W1989032832 @default.
• W2012333909 hasRelatedWork W2041376290 @default.
• W2012333909 hasRelatedWork W2108501893 @default.
• W2012333909 hasRelatedWork W2117167674 @default.
• W2012333909 hasRelatedWork W2125279249 @default.
• W2012333909 hasRelatedWork W2547559563 @default.
• W2012333909 hasRelatedWork W298401505 @default.
• W2012333909 hasRelatedWork W4232095916 @default.
• W2012333909 hasRelatedWork W4239495878 @default.
• W2012333909 hasVolume "31" @default.
• W2012333909 isParatext "false" @default.
• W2012333909 isRetracted "false" @default.
• W2012333909 magId "2012333909" @default.
• W2012333909 workType "article" @default.