Levidorum Hartman 1967
Levidorum Hartman, 1967 Levidorum scotarium Hartman, 1967: 84, pl. 28. Linnean name definition. Type species Levidorum scotarium Hartman, 1967 by monotypy. Nodebased name definition . Levidorum refers to the least inclusive clade comprising L. scotarium Hartman, 1967 and L. hartmanae Perkins, 1987....
Main Author: | |
---|---|
Format: | Text |
Language: | unknown |
Published: |
Zenodo
2004
|
Subjects: | |
Online Access: | https://dx.doi.org/10.5281/zenodo.6273204 https://zenodo.org/record/6273204 |
id |
ftdatacite:10.5281/zenodo.6273204 |
---|---|
record_format |
openpolar |
institution |
Open Polar |
collection |
DataCite Metadata Store (German National Library of Science and Technology) |
op_collection_id |
ftdatacite |
language |
unknown |
topic |
Biodiversity Taxonomy Animalia Annelida Polychaeta Phyllodocida Syllidae Levidorum |
spellingShingle |
Biodiversity Taxonomy Animalia Annelida Polychaeta Phyllodocida Syllidae Levidorum Nygren, Arne Levidorum Hartman 1967 |
topic_facet |
Biodiversity Taxonomy Animalia Annelida Polychaeta Phyllodocida Syllidae Levidorum |
description |
Levidorum Hartman, 1967 Levidorum scotarium Hartman, 1967: 84, pl. 28. Linnean name definition. Type species Levidorum scotarium Hartman, 1967 by monotypy. Nodebased name definition . Levidorum refers to the least inclusive clade comprising L. scotarium Hartman, 1967 and L. hartmanae Perkins, 1987. Apomorphies . Clade supported by 6 morphological apomorphies (Fig. 4): 1) nuchal epaulettes absent (character 7), other most parsimonious reconstructions (MPRs) possible; 2–5) median antenna , lateral antennae , tentacular cirri , and first dorsal cirri absent (characters 11–14); 6) number of teeth equals 5 (character 40), character state change is a parallelism. General description . Atokous form . Length 3.9–12 mm for 37–54 chaetigers; width measured at level of proventricle, 0.3–1.5 mm. Body shape cylindrical in transection, venter flattened; body width fairly constant with tapering end, in L. hartmanae body swollen between chaetiger 2–15. Ciliation absent in L. pori (not known otherwise). Prostomium rounded rectangular, wider than long. Prostomium may dorsally have a transverse furrow, more or less distinct. Perkins (1987) interpret the anterior end differently. What is here considered as the posterior part of the prostomium is believed to be an additional peristomial segment. Eyes absent, or present as four eyes, with lenses, anterior or posterior pair larger. Palps may be present, basally fused, or absent. Nuchal epaulettes absent. All appendages absent. Parapodial lobes very small, rounded to conical. All chaetae simple, knoblike. Bayonet chaetae not found, possibly absent. Pharynx with 1 sinuation anterior and lateral to proventricle. Trepan with 5 equal, and long teeth, arranged in 1 ring. Basal ring present; infradental spines absent. Proventricle with varying number of rows of square shaped muscle cells (unknown in L. scotarium ). Reproduction . Schizogamous reproduction by anterior scissiparity behind chaetiger 13 or 14 (unknown in L. scotarium and L. pori ). Epitokes . Fully developed stolons not examined, but see also description of Autolytus pacificus Treadwell, 1943 (Autolytinae incertae sedis ). : Published as part of Nygren, Arne, 2004, Revision of Autolytinae (Syllidae: Polychaeta)., pp. 1-314 in Zootaxa 680 on pages 88-89, DOI: 10.5281/zenodo.157809 : {"references": ["Hartman, O. (1967) Polychaetous annelids collected by the USNS Eltanin and Staten Island cruises, chiefly from Antarctic seas. Allan Hancock Monographs in Marine Biology, 2, 1 - 387.", "Perkins, T. H. (1987) Levidoridae (Polychaeta), new family, with descriptions of two new species of Levidorum from Florida. Bulletin of the Biological Society of Washington, 7, 162 - 168.", "Treadwell, A. L. (1943) Biological results of the last cruise of the Carnegie. 3. Polychaetous annelids. Carnegie Institute of Washington Publication, 55, 30 - 59."]} |
format |
Text |
author |
Nygren, Arne |
author_facet |
Nygren, Arne |
author_sort |
Nygren, Arne |
title |
Levidorum Hartman 1967 |
title_short |
Levidorum Hartman 1967 |
title_full |
Levidorum Hartman 1967 |
title_fullStr |
Levidorum Hartman 1967 |
title_full_unstemmed |
Levidorum Hartman 1967 |
title_sort |
levidorum hartman 1967 |
publisher |
Zenodo |
publishDate |
2004 |
url |
https://dx.doi.org/10.5281/zenodo.6273204 https://zenodo.org/record/6273204 |
long_lat |
ENVELOPE(-144.850,-144.850,-77.017,-77.017) ENVELOPE(-58.222,-58.222,-64.385,-64.385) |
geographic |
Antarctic Treadwell Nygren |
geographic_facet |
Antarctic Treadwell Nygren |
genre |
Antarc* Antarctic |
genre_facet |
Antarc* Antarctic |
op_relation |
http://publication.plazi.org/id/FFF4CE5ECC774E20FFE07D31881E806B http://zoobank.org/471A4E52-4C92-44F8-AB38-CD03071C0067 https://zenodo.org/communities/biosyslit https://dx.doi.org/10.5281/zenodo.157809 http://publication.plazi.org/id/FFF4CE5ECC774E20FFE07D31881E806B https://dx.doi.org/10.5281/zenodo.157813 http://zoobank.org/471A4E52-4C92-44F8-AB38-CD03071C0067 https://dx.doi.org/10.5281/zenodo.6273203 https://zenodo.org/communities/biosyslit |
op_rights |
Open Access Creative Commons Zero v1.0 Universal https://creativecommons.org/publicdomain/zero/1.0/legalcode cc0-1.0 info:eu-repo/semantics/openAccess |
op_rightsnorm |
CC0 |
op_doi |
https://doi.org/10.5281/zenodo.6273204 https://doi.org/10.5281/zenodo.157809 https://doi.org/10.5281/zenodo.157813 https://doi.org/10.5281/zenodo.6273203 |
_version_ |
1766262423217504256 |
spelling |
ftdatacite:10.5281/zenodo.6273204 2023-05-15T13:55:38+02:00 Levidorum Hartman 1967 Nygren, Arne 2004 https://dx.doi.org/10.5281/zenodo.6273204 https://zenodo.org/record/6273204 unknown Zenodo http://publication.plazi.org/id/FFF4CE5ECC774E20FFE07D31881E806B http://zoobank.org/471A4E52-4C92-44F8-AB38-CD03071C0067 https://zenodo.org/communities/biosyslit https://dx.doi.org/10.5281/zenodo.157809 http://publication.plazi.org/id/FFF4CE5ECC774E20FFE07D31881E806B https://dx.doi.org/10.5281/zenodo.157813 http://zoobank.org/471A4E52-4C92-44F8-AB38-CD03071C0067 https://dx.doi.org/10.5281/zenodo.6273203 https://zenodo.org/communities/biosyslit Open Access Creative Commons Zero v1.0 Universal https://creativecommons.org/publicdomain/zero/1.0/legalcode cc0-1.0 info:eu-repo/semantics/openAccess CC0 Biodiversity Taxonomy Animalia Annelida Polychaeta Phyllodocida Syllidae Levidorum article-journal ScholarlyArticle Taxonomic treatment Text 2004 ftdatacite https://doi.org/10.5281/zenodo.6273204 https://doi.org/10.5281/zenodo.157809 https://doi.org/10.5281/zenodo.157813 https://doi.org/10.5281/zenodo.6273203 2022-04-01T12:37:00Z Levidorum Hartman, 1967 Levidorum scotarium Hartman, 1967: 84, pl. 28. Linnean name definition. Type species Levidorum scotarium Hartman, 1967 by monotypy. Nodebased name definition . Levidorum refers to the least inclusive clade comprising L. scotarium Hartman, 1967 and L. hartmanae Perkins, 1987. Apomorphies . Clade supported by 6 morphological apomorphies (Fig. 4): 1) nuchal epaulettes absent (character 7), other most parsimonious reconstructions (MPRs) possible; 2–5) median antenna , lateral antennae , tentacular cirri , and first dorsal cirri absent (characters 11–14); 6) number of teeth equals 5 (character 40), character state change is a parallelism. General description . Atokous form . Length 3.9–12 mm for 37–54 chaetigers; width measured at level of proventricle, 0.3–1.5 mm. Body shape cylindrical in transection, venter flattened; body width fairly constant with tapering end, in L. hartmanae body swollen between chaetiger 2–15. Ciliation absent in L. pori (not known otherwise). Prostomium rounded rectangular, wider than long. Prostomium may dorsally have a transverse furrow, more or less distinct. Perkins (1987) interpret the anterior end differently. What is here considered as the posterior part of the prostomium is believed to be an additional peristomial segment. Eyes absent, or present as four eyes, with lenses, anterior or posterior pair larger. Palps may be present, basally fused, or absent. Nuchal epaulettes absent. All appendages absent. Parapodial lobes very small, rounded to conical. All chaetae simple, knoblike. Bayonet chaetae not found, possibly absent. Pharynx with 1 sinuation anterior and lateral to proventricle. Trepan with 5 equal, and long teeth, arranged in 1 ring. Basal ring present; infradental spines absent. Proventricle with varying number of rows of square shaped muscle cells (unknown in L. scotarium ). Reproduction . Schizogamous reproduction by anterior scissiparity behind chaetiger 13 or 14 (unknown in L. scotarium and L. pori ). Epitokes . Fully developed stolons not examined, but see also description of Autolytus pacificus Treadwell, 1943 (Autolytinae incertae sedis ). : Published as part of Nygren, Arne, 2004, Revision of Autolytinae (Syllidae: Polychaeta)., pp. 1-314 in Zootaxa 680 on pages 88-89, DOI: 10.5281/zenodo.157809 : {"references": ["Hartman, O. (1967) Polychaetous annelids collected by the USNS Eltanin and Staten Island cruises, chiefly from Antarctic seas. Allan Hancock Monographs in Marine Biology, 2, 1 - 387.", "Perkins, T. H. (1987) Levidoridae (Polychaeta), new family, with descriptions of two new species of Levidorum from Florida. Bulletin of the Biological Society of Washington, 7, 162 - 168.", "Treadwell, A. L. (1943) Biological results of the last cruise of the Carnegie. 3. Polychaetous annelids. Carnegie Institute of Washington Publication, 55, 30 - 59."]} Text Antarc* Antarctic DataCite Metadata Store (German National Library of Science and Technology) Antarctic Treadwell ENVELOPE(-144.850,-144.850,-77.017,-77.017) Nygren ENVELOPE(-58.222,-58.222,-64.385,-64.385) |