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| 2. |
- Wiklund, Helena, 1965, et al.
(författare)
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The phylogenetic relationships between Amphinomidae, Archinomidae and Euphrosinidae (Amphinomida: Aciculata: Polychaeta), inferred from molecular data
- 2008
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Ingår i: Journal of the Marine Biological Association of the UK. - 0025-3154. ; 88:3, s. 509-513
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Tidskriftsartikel (refereegranskat)abstract
- Amphinomida is an ‘isolated’ clade within the polychaete group Aciculata and traditionally includes the families Amphinomidae, Archinomidae and Euphrosinidae. Archinomidae were erected for a single species, the hydrothermal vent polychaete Archinome rosacea. Originally, A. rosacea was assigned to Euphrosinidae although it shares more morphological similarities with Amphinomidae. In this study we assess the position of Archinome, Euphrosinidae and Amphinomidae by using molecular data from nuclear 18S rDNA and 28S rDNA. Parsimony, maximum likelihood and Bayesian analyses are performed on the nucleotide datasets covering in total 19 terminals from Amphinomidae, Euphrosinidae, Archinomidae and outgroups. Our results conclusively show that Euphrosinidae and Amphinomidae are sister taxa and that Archinome is sister to Chloeia within Amphinomidae. Based on these results the family name Archinomidae is treated as a junior synonym of Amphinomidae.
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| 3. |
- Eklöf, Jenny, 1975, et al.
(författare)
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Phylogeny of benthic Phyllodocidae (Polychaeta) based on morphological and molecular data
- 2007
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Ingår i: Molecular Phylogenetics and Evolution. - : Elsevier BV. - 1055-7903. ; 45:1, s. 261-271
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Tidskriftsartikel (refereegranskat)abstract
- A combined molecular (18S rDNA, 28S rDNA, 16S rDNA and COI) and morphological analysis of the benthic phyllodocids is presented for the first time. Nineteen phyllodocids and two outgroup taxa are assessed using parsimony, maximum likelihood and Bayesian analyses. We demonstrate high degrees in homoplasy in the traditionally used morphological phyllodocid characters, and show that all the three current subfamilies Phyllodocinae, Eteoninae and Notophyllinae are non-monophyletic. The genera Eulalia, Eumida, Protomystides, Pseudomystides, Pterocirrus and Sige form a well-supported group, as does Mystides and Nereiphylla. Another clade with strong support includes Eteone and Paranaitis, although with Eteone nested within a paraphyletic Paranaitis. The relationship between these two taxa indicate that the unusual arrangement of modified cirri on the first segments in Eteone is due to a fusion of segment 1 and 2 where the cirri of segment 1 have been reduced. Eulalia is non-monophyletic and should be split, minimally into two groups. Our results are ambiguous regarding the ancestral phyllodocid condition of absence–presence of median antenna or nuchal papilla and uniramous or biramous parapodia, but shows that the absence of cirri on segment 3 (previously an apomorphy, for e.g., Mystides, Pseudomystides and Hesionura) is maximally homoplastic.
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| 4. |
- Ruta, C., et al.
(författare)
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Phylogeny of Hesionidae (Aciculata, Polychaeta), assessed from morphology, 18S rDNA, 28S rDNA, 16S rDNA and COI
- 2007
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Ingår i: Zoologica Scripta. - : Wiley. - 0300-3256 .- 1463-6409. ; 36:1, s. 99-107
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Tidskriftsartikel (refereegranskat)abstract
- We assess phylogenetic relationships within the polychaete family Hesionidae from morphological data combined with nucleotide data from 18S rDNA, 28S rDNA, 16S rDNA and COI. Parsimony and Bayesian analyses were performed on two data sets; the first was based on a more restricted set of terminals with both morphological and molecular data (17 ingroup terminals), while the second included additional taxa with morphological data only (25 ingroup terminals). The different sets of terminals yielded fully congruent results, as did the parsimony and the Bayesian analyses. Our results indicate high levels of homoplasy in traditionally used morphological characters in the group, and that Hesioninae, Gyptini and Gyptis are nonmonophyletic. Hesionini (mainly Hesione and Leocrates), Psamathini (mainly Hesiospina, Micropodarke, Nereimyra, Psamathe and Syllidia), Ophiodrominae (Gyptini and Ophiodromini) and Ophiodromini (mainly Heteropodarke, Ophiodromus and Podarkeopsis) are monophyletic and agree with previous classifications, and Hesionini is probably the sister to all other hesionids. The placements of the small hesionids capricornia and Lizardia, the hydrothermal vent taxa Hesiodeira and Hesiolyra, and the newly described Hesiobranchia, remain uncertain.
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| 5. |
- Nygren, Arne, 1971, et al.
(författare)
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Genetic relationships between Nereimyra punctata and N-woodsholea (Hesionidae, Polychaeta)
- 2005
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Ingår i: Journal of Zoological Systematics and Evolutionary Research. - : Hindawi Limited. - 0947-5745 .- 1439-0469. ; 43:4, s. 273-276
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Tidskriftsartikel (refereegranskat)abstract
- We present a COI-based parsimony analysis of the relationships between the shallow water, pigmented hesionid polychaete Nereimyra punctata, and a deep-water, unpigmented form with sympatric distribution in Norway and Sweden. Apart from the pigmentation differences, the two forms exhibit no observed morphological differences. The terminals are represented by four specimens each of the two forms from the Trondheimsfjord in Norway, and four each of the two forms from northern Bohuslan in Sweden, plus members of the two hesionids Heteropodarke and Ophiodromus as outgroups. In addition, the analysis includes a topotype of the morphologically similar and unpigmented Nereimyra woodsholea from the Middle Atlantic Bight off the US east coast. The equally weighted matrix includes 132 informative characters. All most-parsimonious trees unequivocally indicate that specimens belonging to the same form (pigmented or unpigmented) from different areas are cladistically closer related to each other than different forms from the same areas. Nereimyra woodsholea is nested within the unpigmented deeper group of the Norwegian and Swedish specimens, thus indicating that this name should be applied to the deep-water form in Norway and Sweden.
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| 6. |
- Wiklund, Helena, 1965, et al.
(författare)
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Phylogeny of Aphroditiformia (Polychaeta) based on molecular and morphological data
- 2005
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Ingår i: Molecular Phylogenetics and Evolution. - : Elsevier BV. - 1055-7903. ; 37:2, s. 494-502
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Tidskriftsartikel (refereegranskat)abstract
- The phylogeny of Aphroditiformia, benthic polychaetes carrying dorsal elytra, is assessed from nuclear 18S rDNA, mitochondrial cytochrome c oxidase subunit I (COI), and 31 morphological characters. Two non-elytrabearing taxa, Palmyra and Pisione, are included to assess their relationship to the elytrabearers. The data are analysed both separately and combined, with parsimony, maximum likelihood and Bayesian analyses. In total, 19 terminal taxa are examined, including 12 elytrabearing taxa from all scale-worm groups, Palmyra, Pisione, and five outgroup taxa. The results show that Palmyra and Pisione are nested within Aphroditiformia. Palmyra is sister to Aphrodita, and both Pisione and Pholoe are positioned within Sigalionidae, suggesting that both family names Pisionidae and Pholoidae should be treated as junior synonyms of Sigalionidae. (c) 2005 Elsevier Inc. All rights reserved.
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| 7. |
- Worsaae, K., et al.
(författare)
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Phylogenetic position of Nerillidae and Aberranta (Polychaeta, Annelida), analysed by direct optimization of combined molecular and morphological data
- 2005
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Ingår i: Zoologica Scripta. - : Wiley. - 0300-3256 .- 1463-6409. ; 34:3, s. 313-328
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Tidskriftsartikel (refereegranskat)abstract
- The phylogenetic position of the most speciose meiofaunal polychaete family, Nerillidae, has remained contentious. Recent hypotheses have generally focused on the fact that Nerillidae shares with Aciculata (a major polychaete subgroup) features such as compound chaetae, ventral buccal organ and short ventrolateral palps. Here we present the first phylogenetic analysis of Aciculata, together with Nerillidae, combining morphological and molecular data. We also include Aberrantidae, previously referred to or placed near to spiomorph polychaetes, but recently referred to Aciculata, possibly close to Nerillidae. The data sets of 24 terminals contain 53 morphological characters and nearly complete sequences of 18S rRNA. The sequences were analysed simultaneously with the morphological data by direct optimization in the program POY with a variety of parameter settings (costs of gaps: transversions: transitions). The various settings resulted in markedly different phylogenetic hypotheses, but on the basis of congruence (ILD) the results of two parameter settings were chosen. In all analyses, the three included nerillid species constituted a monophyletic group. Only two analyses provided fully resolved cladograms. The morphological analysis gave poor resolution and the position of the nerillids was equivocal. The two molecular-based cladograms (minimizing ILD) were also poorly resolved, but one provided a position for nerillids next to Eunice pennata and Nothria conchilega, from the subgroup Eunicida within Aciculata. The two cladograms of the combined analyses (minimizing ILD) were fully resolved and placed nerillids in a terminal position next to Aberranta sp., within a clade of eunicidan species. The study showed that the analytical conditions for the homology assignment of 18S rRNA strongly influenced the phylogenetic results. The various previous proposals on the phylogenetic position of the Nerillidae are reviewed, some of which are in accordance with the results of the present study.
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| 8. |
- Dahlgren, Thomas G., 1963, et al.
(författare)
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Morphological and molecular evidence of the phylogeny of Nereidiform polychaetes (Annelida)
- 2000
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Ingår i: Journal of Zoological Systematics and Evolutionary Research. - 0947-5745. ; 38:4, s. 249-253
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Tidskriftsartikel (refereegranskat)abstract
- The phylogeny of Nereidiformia is assessed in a parsimony analysis of combined morphological and DNA data, with special focus on previously questioned relationships between Chrysopetalidae and Hesionidae, between Pilargidae and Hesionidae, and the affinities of Hesionides and Microphthalmus. A 660 by segment of the mtDNA cytochrome c oxidase subunit I gene was sequenced for two chrysopetalids, one nereidid, one pilargid, one pisionid, two hesionids, plus the two questionable hesionids Hesionides arenaria and Microphthalmus sp. Phylogenetic resolution was poor for the cytochrome c oxidase subunit I gene data alone, but the combined analysis yielded partially robust topologies, suggesting that nereids are the sister group to chrysopetalids, and that pilargids, Hesionides and Microphthalmus do not belong within the hesionids.
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