Scale-worm Systematics (Annelida, Polychaeta)
Paper I. Scale-worms are segmented worms. They can be found in all marine benthic habitats, including about 1200 species and over 200 genera. There has been little known about the phylogeny of this group and this study is aiming at achieving one. 56 terminal taxa are examined, including 8 outgroup t...
Main Author: | |
---|---|
Format: | Doctoral or Postdoctoral Thesis |
Language: | English |
Published: |
2013
|
Subjects: | |
Online Access: | http://hdl.handle.net/2077/31920 |
id |
ftunivgoeteborg:oai:gupea.ub.gu.se:2077/31920 |
---|---|
record_format |
openpolar |
spelling |
ftunivgoeteborg:oai:gupea.ub.gu.se:2077/31920 2023-10-29T02:40:37+01:00 Scale-worm Systematics (Annelida, Polychaeta) Norlinder, Erika 2013-02-07 application/pdf image/tiff http://hdl.handle.net/2077/31920 eng eng I. Norlinder et al. (2012). Phylogeny of scale-worms (Aphroditiformia, Annelida), assessed from 18SrRNA, 28SrRNA, 16SrRNA, mitochondrial cytochrome c oxidase subunit I (COI), and morphology. ::doi::10.1016/j.ympev.2012.07.002 II. Norlinder, E., & Pleijel, F. (2013). Redescription and generic affinity of Bylgides sarsi (Kinberg in Malmgren, 1865) (Polynoidae, Aciculata, Annelida). Unpublished manuscript. III. Nygren et al. (2011). Colour polymorphism in the polychaete Harmothoe imbricata (Linnaeus, 1767). ::doi::10.1080/17451001003713555 IV. Pleijel et al. (2008). Phylogenies without roots? A plea for the use of vouchers in molecular phylogenetic studies. ::doi::10.1016/j.ympev.2008.03.024 91-89677-53-6 http://hdl.handle.net/2077/31920 scale-worms systematics phylogeny taxonomy cryptic species voucher Text Doctoral thesis Doctor of Philosophy 2013 ftunivgoeteborg 2023-10-04T21:18:24Z Paper I. Scale-worms are segmented worms. They can be found in all marine benthic habitats, including about 1200 species and over 200 genera. There has been little known about the phylogeny of this group and this study is aiming at achieving one. 56 terminal taxa are examined, including 8 outgroup taxa. Nuclear markers (18SrRNA, 28SrRNA) and mitochondrial markers (16SrRNA, COI) for the molecular analysis and 24 morphological characters were combined in the analysis. The data are analyzed with Bayesian analyses, maximum likelihood and parsimony. The combined data confirm that scaleworms is a monophyletic group. However, the scale-less pisionids and Palmyra aurifera Savigny in Lamarck, 1818, also nest within the scale-worms. In pisionids the lack of elytra represent a secondary loss but the case with P. aurifera is unresolved. There are multiple equally parsimonious pathways one can use to explain this. Only with the case of loss of elytra in P. aurifera, the scales represent a clear-cut synapomorphy (a shared derived state) for scaleworms. The phylogenetic result render some taxonomic changes on family and sub-family level. Paper II. More taxonomy is dealt with in a re-description of Bylgides sarsi (Kinberg in Malmgren, 1865) based on syntypes and fresh material from the Baltic Sea and the use of the phylogenetic results from the phylogeny discussed above. Paper III. Harmothoe imbricata (Linnaeus, 1767), has been reported as a colour-polymorphic species. Hitherto no genetic studies have confirmed this assumption leaving a possibility of cryptic species. 57 individuals representing 10 different colour morphs from Svalbard, Norway and Sweden were investigated. Based on two molecular markers it turns out that H. imbricata indeed is polymorphic and the only differences in allele frequencies is explained by distance. Paper IV. In systematics it is vital to have vouchers. Vouchers enable others to examine the taxonomic identity assigned to a sample by the author of a study. Vouchers are specimens, tissues or ... Doctoral or Postdoctoral Thesis Svalbard University of Gothenburg: GUPEA (Gothenburg University Publications Electronic Archive) |
institution |
Open Polar |
collection |
University of Gothenburg: GUPEA (Gothenburg University Publications Electronic Archive) |
op_collection_id |
ftunivgoeteborg |
language |
English |
topic |
scale-worms systematics phylogeny taxonomy cryptic species voucher |
spellingShingle |
scale-worms systematics phylogeny taxonomy cryptic species voucher Norlinder, Erika Scale-worm Systematics (Annelida, Polychaeta) |
topic_facet |
scale-worms systematics phylogeny taxonomy cryptic species voucher |
description |
Paper I. Scale-worms are segmented worms. They can be found in all marine benthic habitats, including about 1200 species and over 200 genera. There has been little known about the phylogeny of this group and this study is aiming at achieving one. 56 terminal taxa are examined, including 8 outgroup taxa. Nuclear markers (18SrRNA, 28SrRNA) and mitochondrial markers (16SrRNA, COI) for the molecular analysis and 24 morphological characters were combined in the analysis. The data are analyzed with Bayesian analyses, maximum likelihood and parsimony. The combined data confirm that scaleworms is a monophyletic group. However, the scale-less pisionids and Palmyra aurifera Savigny in Lamarck, 1818, also nest within the scale-worms. In pisionids the lack of elytra represent a secondary loss but the case with P. aurifera is unresolved. There are multiple equally parsimonious pathways one can use to explain this. Only with the case of loss of elytra in P. aurifera, the scales represent a clear-cut synapomorphy (a shared derived state) for scaleworms. The phylogenetic result render some taxonomic changes on family and sub-family level. Paper II. More taxonomy is dealt with in a re-description of Bylgides sarsi (Kinberg in Malmgren, 1865) based on syntypes and fresh material from the Baltic Sea and the use of the phylogenetic results from the phylogeny discussed above. Paper III. Harmothoe imbricata (Linnaeus, 1767), has been reported as a colour-polymorphic species. Hitherto no genetic studies have confirmed this assumption leaving a possibility of cryptic species. 57 individuals representing 10 different colour morphs from Svalbard, Norway and Sweden were investigated. Based on two molecular markers it turns out that H. imbricata indeed is polymorphic and the only differences in allele frequencies is explained by distance. Paper IV. In systematics it is vital to have vouchers. Vouchers enable others to examine the taxonomic identity assigned to a sample by the author of a study. Vouchers are specimens, tissues or ... |
format |
Doctoral or Postdoctoral Thesis |
author |
Norlinder, Erika |
author_facet |
Norlinder, Erika |
author_sort |
Norlinder, Erika |
title |
Scale-worm Systematics (Annelida, Polychaeta) |
title_short |
Scale-worm Systematics (Annelida, Polychaeta) |
title_full |
Scale-worm Systematics (Annelida, Polychaeta) |
title_fullStr |
Scale-worm Systematics (Annelida, Polychaeta) |
title_full_unstemmed |
Scale-worm Systematics (Annelida, Polychaeta) |
title_sort |
scale-worm systematics (annelida, polychaeta) |
publishDate |
2013 |
url |
http://hdl.handle.net/2077/31920 |
genre |
Svalbard |
genre_facet |
Svalbard |
op_relation |
I. Norlinder et al. (2012). Phylogeny of scale-worms (Aphroditiformia, Annelida), assessed from 18SrRNA, 28SrRNA, 16SrRNA, mitochondrial cytochrome c oxidase subunit I (COI), and morphology. ::doi::10.1016/j.ympev.2012.07.002 II. Norlinder, E., & Pleijel, F. (2013). Redescription and generic affinity of Bylgides sarsi (Kinberg in Malmgren, 1865) (Polynoidae, Aciculata, Annelida). Unpublished manuscript. III. Nygren et al. (2011). Colour polymorphism in the polychaete Harmothoe imbricata (Linnaeus, 1767). ::doi::10.1080/17451001003713555 IV. Pleijel et al. (2008). Phylogenies without roots? A plea for the use of vouchers in molecular phylogenetic studies. ::doi::10.1016/j.ympev.2008.03.024 91-89677-53-6 http://hdl.handle.net/2077/31920 |
_version_ |
1781068930516779008 |