Phelliactis Simon 1892
Phelliactis sp. (Fig. 2D, 6A,E-F, Table 6) Material examined: MNRJ 9094. (one specimen), South Atlantic Ocean, Potiguar Basin, Rio Grande do Norte, Brazil, station MT 83-2 (04° 27.0256’S, 036° 25.6086’W), May 21, 2011, 1896–1931 m. Description. Tall, cylindrical, cream-colored body, somewhat asymmet...
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Open Polar |
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Biodiversity Taxonomy Animalia Cnidaria Anthozoa Actiniaria Hormathiidae Phelliactis |
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Biodiversity Taxonomy Animalia Cnidaria Anthozoa Actiniaria Hormathiidae Phelliactis De Melo, Yago A. Targino, Alessandra K. G. Gomes, Paula B. Phelliactis Simon 1892 |
topic_facet |
Biodiversity Taxonomy Animalia Cnidaria Anthozoa Actiniaria Hormathiidae Phelliactis |
description |
Phelliactis sp. (Fig. 2D, 6A,E-F, Table 6) Material examined: MNRJ 9094. (one specimen), South Atlantic Ocean, Potiguar Basin, Rio Grande do Norte, Brazil, station MT 83-2 (04° 27.0256’S, 036° 25.6086’W), May 21, 2011, 1896–1931 m. Description. Tall, cylindrical, cream-colored body, somewhat asymmetrical, 13.5 cm high by 6.5 cm width on its longest axis. A big manganese nodule was retained almost completely inside the body, forming a distinct cavity at the base with half the height of the sea anemone (Fig. 6A). The pedal disc was very damaged and mesenteries and associated structures at the aboral side printed on the rock when it was removed for further observation. Column divisible into a smooth, light pink scapulus, withdrawn due to contraction of the oral disc, and a thick, tuberculated scapus. Between 150 and 160 flat to conical tubercles, some with pointed tips, forming longitudinal and transverse rows (Fig. 6E). Oral disc large, bilobed. Approximately 140 short, thin, threadlike tentacles distributed in two marginal cycles. Deep actinopharynx, about two-thirds the length of the body. Two large siphonoglyphs, each attached to a pair of directive mesenteries. Five cycles of mesenteries at the mid-column. Mesenteries are less numerous at the oral side, where four cycles are observed near the oral disc. First and second cycles perfect, including directives, other cycles imperfect. Retractor muscles weak and diffuse (Fig. 6F). Longitudinal muscle of tentacles ectodermal. Radial muscles of the oral disc meso-ectodermal, stronger over the exocoels than over the endocoels. Mesogleal marginal sphincter, alveolar, weak, stratified in the upper portion of the column, where it forms a broader band but abruptly tapering downwards showing scattered and elongated alveoli in longitudinal rows. Acontia rare and small. No gametogenic tissue observed. Cnidom. Spirocysts, Basitrichs, Microbasic p -mastigophores (Table 6). Remarks. Seven species of Phelliactis are registered in the South Atlantic Ocean (data from Ocean Biogeographic Information System- https://obis.org/), but only three of them are known from Brazil: Ph. capricornis , Ph. pelophila, and Ph. robusta (present study). The correct identification of species for this genus requires caution and a minute analysis (Doumenc 1975), which was not possible with the material at hand. Nonetheless, we find it to be distinct from the other Phelliactis species found in the studied area. For example, Ph. robusta , possesses strictly six pairs of perfect mesenteries and also differs from Phelliactis sp. in coloration and thickness of the column. : Published as part of De Melo, Yago A., Targino, Alessandra K. G. & Gomes, Paula B., 2020, New records of family Hormathiidae (Cnidaria: Actiniaria) from Brazilian coast with description of Paraphelliactis labiata n. sp., pp. 557-574 in Zootaxa 4766 (4) on pages 568-570, DOI: 10.11646/zootaxa.4766.4.3, http://zenodo.org/record/3765725 : {"references": ["Doumenc, D. (1975) Actinies bathyales et abyssales de l'ocean Atlantique nord. Familles des Hormathiidae (genres Paracalliactis et Phelliactis) et des Actinostolidae (genres Actinoscyphia et Sicyonis). Bulletin du Museum National d'Histoire Naturelle, Paris, 197, 157 - 204."]} |
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Text |
author |
De Melo, Yago A. Targino, Alessandra K. G. Gomes, Paula B. |
author_facet |
De Melo, Yago A. Targino, Alessandra K. G. Gomes, Paula B. |
author_sort |
De Melo, Yago A. |
title |
Phelliactis Simon 1892 |
title_short |
Phelliactis Simon 1892 |
title_full |
Phelliactis Simon 1892 |
title_fullStr |
Phelliactis Simon 1892 |
title_full_unstemmed |
Phelliactis Simon 1892 |
title_sort |
phelliactis simon 1892 |
publisher |
Zenodo |
publishDate |
2020 |
url |
https://dx.doi.org/10.5281/zenodo.3803400 https://zenodo.org/record/3803400 |
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South Atlantic Ocean |
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South Atlantic Ocean |
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Open Access info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.5281/zenodo.3803400 https://doi.org/10.11646/zootaxa.4766.4.3 https://doi.org/10.5281/zenodo.3765729 https://doi.org/10.5281/zenodo.3765737 https://doi.org/10.5281/zenodo.3803399 |
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ftdatacite:10.5281/zenodo.3803400 2023-05-15T18:21:09+02:00 Phelliactis Simon 1892 De Melo, Yago A. Targino, Alessandra K. G. Gomes, Paula B. 2020 https://dx.doi.org/10.5281/zenodo.3803400 https://zenodo.org/record/3803400 unknown Zenodo http://zenodo.org/record/3765725 http://publication.plazi.org/id/CE4C6A392C4FF326D40CFFC22B2EFFAF http://zoobank.org/urn:lsid:zoobank.org:pub:2F7D5622-E80D-42A4-A10A-C328B70A6379 https://zenodo.org/communities/biosyslit https://dx.doi.org/10.11646/zootaxa.4766.4.3 http://zenodo.org/record/3765725 http://publication.plazi.org/id/CE4C6A392C4FF326D40CFFC22B2EFFAF https://dx.doi.org/10.5281/zenodo.3765729 https://dx.doi.org/10.5281/zenodo.3765737 http://zoobank.org/urn:lsid:zoobank.org:pub:2F7D5622-E80D-42A4-A10A-C328B70A6379 https://dx.doi.org/10.5281/zenodo.3803399 https://zenodo.org/communities/biosyslit Open Access info:eu-repo/semantics/openAccess Biodiversity Taxonomy Animalia Cnidaria Anthozoa Actiniaria Hormathiidae Phelliactis Text Taxonomic treatment article-journal ScholarlyArticle 2020 ftdatacite https://doi.org/10.5281/zenodo.3803400 https://doi.org/10.11646/zootaxa.4766.4.3 https://doi.org/10.5281/zenodo.3765729 https://doi.org/10.5281/zenodo.3765737 https://doi.org/10.5281/zenodo.3803399 2021-11-05T12:55:41Z Phelliactis sp. (Fig. 2D, 6A,E-F, Table 6) Material examined: MNRJ 9094. (one specimen), South Atlantic Ocean, Potiguar Basin, Rio Grande do Norte, Brazil, station MT 83-2 (04° 27.0256’S, 036° 25.6086’W), May 21, 2011, 1896–1931 m. Description. Tall, cylindrical, cream-colored body, somewhat asymmetrical, 13.5 cm high by 6.5 cm width on its longest axis. A big manganese nodule was retained almost completely inside the body, forming a distinct cavity at the base with half the height of the sea anemone (Fig. 6A). The pedal disc was very damaged and mesenteries and associated structures at the aboral side printed on the rock when it was removed for further observation. Column divisible into a smooth, light pink scapulus, withdrawn due to contraction of the oral disc, and a thick, tuberculated scapus. Between 150 and 160 flat to conical tubercles, some with pointed tips, forming longitudinal and transverse rows (Fig. 6E). Oral disc large, bilobed. Approximately 140 short, thin, threadlike tentacles distributed in two marginal cycles. Deep actinopharynx, about two-thirds the length of the body. Two large siphonoglyphs, each attached to a pair of directive mesenteries. Five cycles of mesenteries at the mid-column. Mesenteries are less numerous at the oral side, where four cycles are observed near the oral disc. First and second cycles perfect, including directives, other cycles imperfect. Retractor muscles weak and diffuse (Fig. 6F). Longitudinal muscle of tentacles ectodermal. Radial muscles of the oral disc meso-ectodermal, stronger over the exocoels than over the endocoels. Mesogleal marginal sphincter, alveolar, weak, stratified in the upper portion of the column, where it forms a broader band but abruptly tapering downwards showing scattered and elongated alveoli in longitudinal rows. Acontia rare and small. No gametogenic tissue observed. Cnidom. Spirocysts, Basitrichs, Microbasic p -mastigophores (Table 6). Remarks. Seven species of Phelliactis are registered in the South Atlantic Ocean (data from Ocean Biogeographic Information System- https://obis.org/), but only three of them are known from Brazil: Ph. capricornis , Ph. pelophila, and Ph. robusta (present study). The correct identification of species for this genus requires caution and a minute analysis (Doumenc 1975), which was not possible with the material at hand. Nonetheless, we find it to be distinct from the other Phelliactis species found in the studied area. For example, Ph. robusta , possesses strictly six pairs of perfect mesenteries and also differs from Phelliactis sp. in coloration and thickness of the column. : Published as part of De Melo, Yago A., Targino, Alessandra K. G. & Gomes, Paula B., 2020, New records of family Hormathiidae (Cnidaria: Actiniaria) from Brazilian coast with description of Paraphelliactis labiata n. sp., pp. 557-574 in Zootaxa 4766 (4) on pages 568-570, DOI: 10.11646/zootaxa.4766.4.3, http://zenodo.org/record/3765725 : {"references": ["Doumenc, D. (1975) Actinies bathyales et abyssales de l'ocean Atlantique nord. Familles des Hormathiidae (genres Paracalliactis et Phelliactis) et des Actinostolidae (genres Actinoscyphia et Sicyonis). Bulletin du Museum National d'Histoire Naturelle, Paris, 197, 157 - 204."]} Text South Atlantic Ocean DataCite Metadata Store (German National Library of Science and Technology) |