Amythas Benham 1921
Genus Amythas Benham, 1921 Type species (by monotypy) and type locality Amythas membranifera Benham, 1921. Type locality: Commonwealth Bay (Antarctica), 325 fathoms (594 m). Diagnosis PROSTOMIUM. Prostomium of Ampharete -like, subdivided by a U-shaped groove; median lobe anteriorly rounded; nuchal o...
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ftzenodo:oai:zenodo.org:4529801 2023-05-15T13:49:14+02:00 Amythas Benham 1921 Schiaparelli, Stefano Jirkov, Igor A. 2021-02-08 https://zenodo.org/record/4529801 https://doi.org/10.5281/zenodo.4529801 unknown info:eu-repo/semantics/altIdentifier/url/http://treatment.plazi.org/id/03A8045EF713FFDA5128F593FD01680E doi:10.5852/ejt.2021.733.1227 http://zenodo.org/record/4529795 http://publication.plazi.org/id/FF917C26F71AFFD0534AF632FFF56A14 http://zoobank.org/1AAE62AF-ABD9-4930-B1DE-2C05F66BEC4A doi:10.5281/zenodo.4529800 https://zenodo.org/communities/biosyslit https://zenodo.org/record/4529801 https://doi.org/10.5281/zenodo.4529801 oai:zenodo.org:4529801 info:eu-repo/semantics/openAccess https://creativecommons.org/publicdomain/zero/1.0/legalcode Contribution to the taxonomic knowledge of Ampharetidae (Annelida) from Antarctica with the description of Amage giacomobovei sp. nov., pp. 125-145 in European Journal of Taxonomy 733 134-135 Biodiversity Taxonomy Animalia Annelida Polychaeta Terebellida Ampharetidae Amythas info:eu-repo/semantics/other publication-taxonomictreatment 2021 ftzenodo https://doi.org/10.5281/zenodo.452980110.5852/ejt.2021.733.122710.5281/zenodo.4529800 2023-03-10T19:14:55Z Genus Amythas Benham, 1921 Type species (by monotypy) and type locality Amythas membranifera Benham, 1921. Type locality: Commonwealth Bay (Antarctica), 325 fathoms (594 m). Diagnosis PROSTOMIUM. Prostomium of Ampharete -like, subdivided by a U-shaped groove; median lobe anteriorly rounded; nuchal organs and ridges absent; lower lip not enlarged and longitudinally grooved; nephridial pores/papillae not visible. THORAX. Dorsal ridges absent. NOTOPODIA. Modified notopodia absent. NEUROPODIA. Neuropodia of single type, their uncini generally similar, enlarged neuropodia absent. Remarks Jirkov (2011) proposed the inclusion of Amythas in Neosabellides Hessle, 1917 with certain doubts. However, the new material from Antarctica available for this study clarifies the position of Amythas, which is here considered valid, and its type species redescribed. The status of Neosabellides has been clarified earlier (Jirkov 2018). Amythas has an Ampharete -like prostomium but it differs from all other known genera of Ampharetinae Malmgren, 1866 by the following combination of characters: i) absence of nephridial pores/papillae behind branchiae; ii) middle lobe of prostomium anteriorly rounded; iii) absence of nuchal ridges and any other structures of the prostomium; iv) thoracic and abdominal neuropodia of the same shape; v) absence of modified notopodia; vi) absence of dorsal ridges; vii) absence of enlarged neuropodia; viii) uncini of thoracic and abdominal neuropodia with similar morphology. The genus Amythas also differs from Ampharete Malmgren, 1866 by the absence of a pair of nephridial papillae behind branchiae. In this aspect Amythas is close to Amage, and that is why Amythas septemdecima Schüller & Jirkov, 2013 was initially placed in Amage. Due to the above considerations, Amage septemdecima (Schüller & Jirkov, 2013) is here transferred to the genus Amythas due to the combination of characters such as the shape of prostomium, the absence of nephridial papillae behind the branchiae, the similarity of uncini and ... Other/Unknown Material Antarc* Antarctica Zenodo Commonwealth Bay ENVELOPE(142.500,142.500,-67.000,-67.000) Malmgren ENVELOPE(-66.117,-66.117,-65.750,-65.750) |
institution |
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collection |
Zenodo |
op_collection_id |
ftzenodo |
language |
unknown |
topic |
Biodiversity Taxonomy Animalia Annelida Polychaeta Terebellida Ampharetidae Amythas |
spellingShingle |
Biodiversity Taxonomy Animalia Annelida Polychaeta Terebellida Ampharetidae Amythas Schiaparelli, Stefano Jirkov, Igor A. Amythas Benham 1921 |
topic_facet |
Biodiversity Taxonomy Animalia Annelida Polychaeta Terebellida Ampharetidae Amythas |
description |
Genus Amythas Benham, 1921 Type species (by monotypy) and type locality Amythas membranifera Benham, 1921. Type locality: Commonwealth Bay (Antarctica), 325 fathoms (594 m). Diagnosis PROSTOMIUM. Prostomium of Ampharete -like, subdivided by a U-shaped groove; median lobe anteriorly rounded; nuchal organs and ridges absent; lower lip not enlarged and longitudinally grooved; nephridial pores/papillae not visible. THORAX. Dorsal ridges absent. NOTOPODIA. Modified notopodia absent. NEUROPODIA. Neuropodia of single type, their uncini generally similar, enlarged neuropodia absent. Remarks Jirkov (2011) proposed the inclusion of Amythas in Neosabellides Hessle, 1917 with certain doubts. However, the new material from Antarctica available for this study clarifies the position of Amythas, which is here considered valid, and its type species redescribed. The status of Neosabellides has been clarified earlier (Jirkov 2018). Amythas has an Ampharete -like prostomium but it differs from all other known genera of Ampharetinae Malmgren, 1866 by the following combination of characters: i) absence of nephridial pores/papillae behind branchiae; ii) middle lobe of prostomium anteriorly rounded; iii) absence of nuchal ridges and any other structures of the prostomium; iv) thoracic and abdominal neuropodia of the same shape; v) absence of modified notopodia; vi) absence of dorsal ridges; vii) absence of enlarged neuropodia; viii) uncini of thoracic and abdominal neuropodia with similar morphology. The genus Amythas also differs from Ampharete Malmgren, 1866 by the absence of a pair of nephridial papillae behind branchiae. In this aspect Amythas is close to Amage, and that is why Amythas septemdecima Schüller & Jirkov, 2013 was initially placed in Amage. Due to the above considerations, Amage septemdecima (Schüller & Jirkov, 2013) is here transferred to the genus Amythas due to the combination of characters such as the shape of prostomium, the absence of nephridial papillae behind the branchiae, the similarity of uncini and ... |
format |
Other/Unknown Material |
author |
Schiaparelli, Stefano Jirkov, Igor A. |
author_facet |
Schiaparelli, Stefano Jirkov, Igor A. |
author_sort |
Schiaparelli, Stefano |
title |
Amythas Benham 1921 |
title_short |
Amythas Benham 1921 |
title_full |
Amythas Benham 1921 |
title_fullStr |
Amythas Benham 1921 |
title_full_unstemmed |
Amythas Benham 1921 |
title_sort |
amythas benham 1921 |
publishDate |
2021 |
url |
https://zenodo.org/record/4529801 https://doi.org/10.5281/zenodo.4529801 |
long_lat |
ENVELOPE(142.500,142.500,-67.000,-67.000) ENVELOPE(-66.117,-66.117,-65.750,-65.750) |
geographic |
Commonwealth Bay Malmgren |
geographic_facet |
Commonwealth Bay Malmgren |
genre |
Antarc* Antarctica |
genre_facet |
Antarc* Antarctica |
op_source |
Contribution to the taxonomic knowledge of Ampharetidae (Annelida) from Antarctica with the description of Amage giacomobovei sp. nov., pp. 125-145 in European Journal of Taxonomy 733 134-135 |
op_relation |
info:eu-repo/semantics/altIdentifier/url/http://treatment.plazi.org/id/03A8045EF713FFDA5128F593FD01680E doi:10.5852/ejt.2021.733.1227 http://zenodo.org/record/4529795 http://publication.plazi.org/id/FF917C26F71AFFD0534AF632FFF56A14 http://zoobank.org/1AAE62AF-ABD9-4930-B1DE-2C05F66BEC4A doi:10.5281/zenodo.4529800 https://zenodo.org/communities/biosyslit https://zenodo.org/record/4529801 https://doi.org/10.5281/zenodo.4529801 oai:zenodo.org:4529801 |
op_rights |
info:eu-repo/semantics/openAccess https://creativecommons.org/publicdomain/zero/1.0/legalcode |
op_doi |
https://doi.org/10.5281/zenodo.452980110.5852/ejt.2021.733.122710.5281/zenodo.4529800 |
_version_ |
1766251031394516992 |