Neactaeonina argentina, new species, and family placement of the genus Neactaeonina thiele, 1912 (Mollusca: Gastropoda)
Neactaeonina argentina, a new species from the outer Argentine shelf off Buenos Aires province, is described. The species is characterized by the elongate, low-spired shell, with shouldered, nearly straight whorls, deep suture, and sculpture composed of numerous, broad, flat spiral cords. The radula...
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ftunbuenosairrdi:oai:RDI UBA:artiaex:paper_00762997_v53_n2_p251_Zelaya_oai 2023-05-15T18:25:39+02:00 Neactaeonina argentina, new species, and family placement of the genus Neactaeonina thiele, 1912 (Mollusca: Gastropoda) Zelaya, D.G. Schejter, L. Ituarte, C. 2011 application/pdf https://hdl.handle.net/20.500.12110/paper_00762997_v53_n2_p251_Zelaya http://repositoriouba.sisbi.uba.ar/gsdl/cgi-bin/library.cgi?a=d&c=artiaex&d=paper_00762997_v53_n2_p251_Zelaya_oai unknown http://hdl.handle.net/20.500.12110/paper_00762997_v53_n2_p251_Zelaya http://repositoriouba.sisbi.uba.ar/gsdl/cgi-bin/library.cgi?a=d&c=artiaex&d=paper_00762997_v53_n2_p251_Zelaya_oai info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar CC-BY Malacologia 2011;53(2):251-263 Acteonidae Gastropoda Neactaeonina Southern Ocean Acteon Cingulata Mollusca info:eu-repo/semantics/article info:ar-repo/semantics/artÃculo info:eu-repo/semantics/publishedVersion 2011 ftunbuenosairrdi https://doi.org/20.500.12110/paper_00762997_v53_n2_p251_Zelaya 2020-10-22T00:10:07Z Neactaeonina argentina, a new species from the outer Argentine shelf off Buenos Aires province, is described. The species is characterized by the elongate, low-spired shell, with shouldered, nearly straight whorls, deep suture, and sculpture composed of numerous, broad, flat spiral cords. The radula is similar to that previously described for the type species, Neactaeonina cingulata Thiele, 1912, except in having a greater number of teeth. The present study provides the first information on the anatomy and histology of the genital system, and details of the radula anatomy of Neactaeonina, both unknown to date. The study of anatomical characters demonstrates that Neactaeonina has clear similarities with other Acteonidae, with a combination of features present in Acteon (such as the presence of a strongly calcified shell, with well-developed operculum; mantle cavity opening anteriorly; nervous system with only the cerebropleural ganglia fused; a single allosperm sac associated with the female system; radula without cardinal tooth; and oral cuticle with rod-like processes); and some characters present in acteonid genera other than Acteon (e.g., the number and morphology of teeth, and processes of the oral cuticle). However, Neactaeonina shows some characters thus far not reported for any other genus currently placed into the Acteonidae: salivary glands with laminar structure, male genital system with an open portion, a single allosperm sac opening distally, and a flat and triangular copulatory organ. Fil:Zelaya, D.G. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Article in Journal/Newspaper Southern Ocean Repositorio Digital Institucional - Universidad de Buenos Aires (RDI UBA) Argentina Argentine Southern Ocean |
institution |
Open Polar |
collection |
Repositorio Digital Institucional - Universidad de Buenos Aires (RDI UBA) |
op_collection_id |
ftunbuenosairrdi |
language |
unknown |
topic |
Acteonidae Gastropoda Neactaeonina Southern Ocean Acteon Cingulata Mollusca |
spellingShingle |
Acteonidae Gastropoda Neactaeonina Southern Ocean Acteon Cingulata Mollusca Zelaya, D.G. Schejter, L. Ituarte, C. Neactaeonina argentina, new species, and family placement of the genus Neactaeonina thiele, 1912 (Mollusca: Gastropoda) |
topic_facet |
Acteonidae Gastropoda Neactaeonina Southern Ocean Acteon Cingulata Mollusca |
description |
Neactaeonina argentina, a new species from the outer Argentine shelf off Buenos Aires province, is described. The species is characterized by the elongate, low-spired shell, with shouldered, nearly straight whorls, deep suture, and sculpture composed of numerous, broad, flat spiral cords. The radula is similar to that previously described for the type species, Neactaeonina cingulata Thiele, 1912, except in having a greater number of teeth. The present study provides the first information on the anatomy and histology of the genital system, and details of the radula anatomy of Neactaeonina, both unknown to date. The study of anatomical characters demonstrates that Neactaeonina has clear similarities with other Acteonidae, with a combination of features present in Acteon (such as the presence of a strongly calcified shell, with well-developed operculum; mantle cavity opening anteriorly; nervous system with only the cerebropleural ganglia fused; a single allosperm sac associated with the female system; radula without cardinal tooth; and oral cuticle with rod-like processes); and some characters present in acteonid genera other than Acteon (e.g., the number and morphology of teeth, and processes of the oral cuticle). However, Neactaeonina shows some characters thus far not reported for any other genus currently placed into the Acteonidae: salivary glands with laminar structure, male genital system with an open portion, a single allosperm sac opening distally, and a flat and triangular copulatory organ. Fil:Zelaya, D.G. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. |
format |
Article in Journal/Newspaper |
author |
Zelaya, D.G. Schejter, L. Ituarte, C. |
author_facet |
Zelaya, D.G. Schejter, L. Ituarte, C. |
author_sort |
Zelaya, D.G. |
title |
Neactaeonina argentina, new species, and family placement of the genus Neactaeonina thiele, 1912 (Mollusca: Gastropoda) |
title_short |
Neactaeonina argentina, new species, and family placement of the genus Neactaeonina thiele, 1912 (Mollusca: Gastropoda) |
title_full |
Neactaeonina argentina, new species, and family placement of the genus Neactaeonina thiele, 1912 (Mollusca: Gastropoda) |
title_fullStr |
Neactaeonina argentina, new species, and family placement of the genus Neactaeonina thiele, 1912 (Mollusca: Gastropoda) |
title_full_unstemmed |
Neactaeonina argentina, new species, and family placement of the genus Neactaeonina thiele, 1912 (Mollusca: Gastropoda) |
title_sort |
neactaeonina argentina, new species, and family placement of the genus neactaeonina thiele, 1912 (mollusca: gastropoda) |
publishDate |
2011 |
url |
https://hdl.handle.net/20.500.12110/paper_00762997_v53_n2_p251_Zelaya http://repositoriouba.sisbi.uba.ar/gsdl/cgi-bin/library.cgi?a=d&c=artiaex&d=paper_00762997_v53_n2_p251_Zelaya_oai |
geographic |
Argentina Argentine Southern Ocean |
geographic_facet |
Argentina Argentine Southern Ocean |
genre |
Southern Ocean |
genre_facet |
Southern Ocean |
op_source |
Malacologia 2011;53(2):251-263 |
op_relation |
http://hdl.handle.net/20.500.12110/paper_00762997_v53_n2_p251_Zelaya http://repositoriouba.sisbi.uba.ar/gsdl/cgi-bin/library.cgi?a=d&c=artiaex&d=paper_00762997_v53_n2_p251_Zelaya_oai |
op_rights |
info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/20.500.12110/paper_00762997_v53_n2_p251_Zelaya |
_version_ |
1766207250280480768 |