Aphelochaeta Blake 1991
Genus Aphelochaeta Blake, 1991 Type species : Tharyx monilaris Hartman, 1960. Original designation by Blake (1991). Diagnosis. (emended, Dean & Blake 2016). Prostomium conical to rounded; peristomium elongate with pair of grooved dorsal tentacles arising either on or anterior to setiger 1. Anter...
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ftzenodo:oai:zenodo.org:3798632 2024-09-15T17:44:21+00:00 Aphelochaeta Blake 1991 Blake, James A. 2018-12-21 https://doi.org/10.5281/zenodo.3798632 http://treatment.plazi.org/id/03A2CB16FFFDA243FF36FAA3FEA3FABC unknown Zenodo https://doi.org/10.11646/zootaxa.4537.1.1 http://zenodo.org/record/3771214 http://publication.plazi.org/id/FF9BB36EFFF5A24AFFA1FFBEFF85FFC4 https://sibils.text-analytics.ch/search/collections/plazi/03A2CB16FFFDA243FF36FAA3FEA3FABC https://www.gbif.org/species/163813258 https://www.checklistbank.org/dataset/22563/taxon/03A2CB16FFFDA243FF36FAA3FEA3FABC.taxon http://zoobank.org/169CBE5C-3A6E-438B-8A81-0491CBFBAC85 https://zenodo.org/communities/biosyslit https://doi.org/10.5281/zenodo.3798631 https://doi.org/10.5281/zenodo.3798632 oai:zenodo.org:3798632 http://treatment.plazi.org/id/03A2CB16FFFDA243FF36FAA3FEA3FABC info:eu-repo/semantics/openAccess Creative Commons Zero v1.0 Universal https://creativecommons.org/publicdomain/zero/1.0/legalcode Bitentaculate Cirratulidae (Annelida, Polychaeta) collected chiefly during cruises of the R / V Anton Bruun, USNS Eltanin, USCG Glacier, R / V Hero, RVIB Nathaniel B. Palmer, and R / V Polarstern from the Southern Ocean, Antarctica, and off Western South America, pp. 1-130 in Zootaxa, 4537(1), 9-10, (2018-12-21) Biodiversity Taxonomy Animalia Annelida Polychaeta Terebellida Cirratulidae Aphelochaeta info:eu-repo/semantics/other 2018 ftzenodo https://doi.org/10.5281/zenodo.379863210.11646/zootaxa.4537.1.110.5281/zenodo.3798631 2024-07-25T15:03:31Z Genus Aphelochaeta Blake, 1991 Type species : Tharyx monilaris Hartman, 1960. Original designation by Blake (1991). Diagnosis. (emended, Dean & Blake 2016). Prostomium conical to rounded; peristomium elongate with pair of grooved dorsal tentacles arising either on or anterior to setiger 1. Anterior segments often expanded, crowded or uncrowded; abdominal segments sometimes beaded or moniliform in appearance; setae simple capillaries lacking distinct serrations using light microscopy but distinct fibrils may be visible using SEM; posterior end frequently expanded, tapering to a simple pygidial lobe. Remarks. Blake (1991) assigned bitentaculate cirratulid species having only simple, non-serrated capillary setae to the genus Aphelochaeta . The species belonging to Aphelochaeta are among the most enigmatic and difficult to identify of all cirratulids because of the lack of obvious variability in setal morphology. However, there is considerable variation in body shape, details of the prostomium and peristomium, placement of the dorsal tentacles and anterior branchiae, presence or absence of dorsal and ventral grooves and ridges, form of the posterior end and pygidium, and Methyl Green staining patterns. Sometimes the capillaries do differ in thickness and length among species, but this is difficult to quantify and depict in a manner that enables readers of descriptions to distinguish one species from another. Additionally, the capillaries often exhibit numerous fibrils along the shaft, but these are best seen with SEM and difficult to observe in light microscopy. Despite the specific nature of different combinations of these characters, closely related species are usually difficult to distinguish from one another. Blake (1996) pointed out that it is usually only at the local or regional level that keys to species have any utility. Hartman (1966, 1967) referred all bitentaculate cirratulids having only capillary setae and previously reported from Antarctica to Tharyx according to definitions then in use. Types of ... Other/Unknown Material Antarc* Antarctica Zenodo |
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collection |
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language |
unknown |
topic |
Biodiversity Taxonomy Animalia Annelida Polychaeta Terebellida Cirratulidae Aphelochaeta |
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Biodiversity Taxonomy Animalia Annelida Polychaeta Terebellida Cirratulidae Aphelochaeta Blake, James A. Aphelochaeta Blake 1991 |
topic_facet |
Biodiversity Taxonomy Animalia Annelida Polychaeta Terebellida Cirratulidae Aphelochaeta |
description |
Genus Aphelochaeta Blake, 1991 Type species : Tharyx monilaris Hartman, 1960. Original designation by Blake (1991). Diagnosis. (emended, Dean & Blake 2016). Prostomium conical to rounded; peristomium elongate with pair of grooved dorsal tentacles arising either on or anterior to setiger 1. Anterior segments often expanded, crowded or uncrowded; abdominal segments sometimes beaded or moniliform in appearance; setae simple capillaries lacking distinct serrations using light microscopy but distinct fibrils may be visible using SEM; posterior end frequently expanded, tapering to a simple pygidial lobe. Remarks. Blake (1991) assigned bitentaculate cirratulid species having only simple, non-serrated capillary setae to the genus Aphelochaeta . The species belonging to Aphelochaeta are among the most enigmatic and difficult to identify of all cirratulids because of the lack of obvious variability in setal morphology. However, there is considerable variation in body shape, details of the prostomium and peristomium, placement of the dorsal tentacles and anterior branchiae, presence or absence of dorsal and ventral grooves and ridges, form of the posterior end and pygidium, and Methyl Green staining patterns. Sometimes the capillaries do differ in thickness and length among species, but this is difficult to quantify and depict in a manner that enables readers of descriptions to distinguish one species from another. Additionally, the capillaries often exhibit numerous fibrils along the shaft, but these are best seen with SEM and difficult to observe in light microscopy. Despite the specific nature of different combinations of these characters, closely related species are usually difficult to distinguish from one another. Blake (1996) pointed out that it is usually only at the local or regional level that keys to species have any utility. Hartman (1966, 1967) referred all bitentaculate cirratulids having only capillary setae and previously reported from Antarctica to Tharyx according to definitions then in use. Types of ... |
format |
Other/Unknown Material |
author |
Blake, James A. |
author_facet |
Blake, James A. |
author_sort |
Blake, James A. |
title |
Aphelochaeta Blake 1991 |
title_short |
Aphelochaeta Blake 1991 |
title_full |
Aphelochaeta Blake 1991 |
title_fullStr |
Aphelochaeta Blake 1991 |
title_full_unstemmed |
Aphelochaeta Blake 1991 |
title_sort |
aphelochaeta blake 1991 |
publisher |
Zenodo |
publishDate |
2018 |
url |
https://doi.org/10.5281/zenodo.3798632 http://treatment.plazi.org/id/03A2CB16FFFDA243FF36FAA3FEA3FABC |
genre |
Antarc* Antarctica |
genre_facet |
Antarc* Antarctica |
op_source |
Bitentaculate Cirratulidae (Annelida, Polychaeta) collected chiefly during cruises of the R / V Anton Bruun, USNS Eltanin, USCG Glacier, R / V Hero, RVIB Nathaniel B. Palmer, and R / V Polarstern from the Southern Ocean, Antarctica, and off Western South America, pp. 1-130 in Zootaxa, 4537(1), 9-10, (2018-12-21) |
op_relation |
https://doi.org/10.11646/zootaxa.4537.1.1 http://zenodo.org/record/3771214 http://publication.plazi.org/id/FF9BB36EFFF5A24AFFA1FFBEFF85FFC4 https://sibils.text-analytics.ch/search/collections/plazi/03A2CB16FFFDA243FF36FAA3FEA3FABC https://www.gbif.org/species/163813258 https://www.checklistbank.org/dataset/22563/taxon/03A2CB16FFFDA243FF36FAA3FEA3FABC.taxon http://zoobank.org/169CBE5C-3A6E-438B-8A81-0491CBFBAC85 https://zenodo.org/communities/biosyslit https://doi.org/10.5281/zenodo.3798631 https://doi.org/10.5281/zenodo.3798632 oai:zenodo.org:3798632 http://treatment.plazi.org/id/03A2CB16FFFDA243FF36FAA3FEA3FABC |
op_rights |
info:eu-repo/semantics/openAccess Creative Commons Zero v1.0 Universal https://creativecommons.org/publicdomain/zero/1.0/legalcode |
op_doi |
https://doi.org/10.5281/zenodo.379863210.11646/zootaxa.4537.1.110.5281/zenodo.3798631 |
_version_ |
1810491818165403648 |