Neactaeonina argentina, new species, and family placement of the genus Neactaeonina thiele, 1912 (Mollusca: Gastropoda)

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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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Autores principales: Zelaya, D.G., Schejter, L., Ituarte, C.
Formato: Artículo publishedVersion
Publicado: 2011
Materias:
Acteonidae
Gastropoda
Neactaeonina
Southern Ocean
Acteon
Cingulata
Mollusca
Acceso en línea:http://hdl.handle.net/20.500.12110/paper_00762997_v53_n2_p251_Zelaya
https://repositoriouba.sisbi.uba.ar/gsdl/cgi-bin/library.cgi?a=d&c=artiaex&d=paper_00762997_v53_n2_p251_Zelaya_oai
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Repositorio Digital de la Universidad de Buenos Aires (UBA) de Universidad de Buenos Aires
id I28-R145-paper_00762997_v53_n2_p251_Zelaya_oai
record_format dspace
spelling I28-R145-paper_00762997_v53_n2_p251_Zelaya_oai2024-08-16 Zelaya, D.G. Schejter, L. Ituarte, C. 2011 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. application/pdf http://hdl.handle.net/20.500.12110/paper_00762997_v53_n2_p251_Zelaya info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar Malacologia 2011;53(2):251-263 Acteonidae Gastropoda Neactaeonina Southern Ocean Acteon Acteonidae Cingulata Gastropoda Mollusca Neactaeonina argentina, new species, and family placement of the genus Neactaeonina thiele, 1912 (Mollusca: Gastropoda) info:eu-repo/semantics/article info:ar-repo/semantics/artículo info:eu-repo/semantics/publishedVersion https://repositoriouba.sisbi.uba.ar/gsdl/cgi-bin/library.cgi?a=d&c=artiaex&d=paper_00762997_v53_n2_p251_Zelaya_oai
institution Universidad de Buenos Aires
institution_str I-28
repository_str R-145
collection Repositorio Digital de la Universidad de Buenos Aires (UBA)
topic Acteonidae
Gastropoda
Neactaeonina
Southern Ocean
Acteon
Acteonidae
Cingulata
Gastropoda
Mollusca
spellingShingle Acteonidae
Gastropoda
Neactaeonina
Southern Ocean
Acteon
Acteonidae
Cingulata
Gastropoda
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
Acteonidae
Cingulata
Gastropoda
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.
format Artículo
Artículo
publishedVersion
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 http://hdl.handle.net/20.500.12110/paper_00762997_v53_n2_p251_Zelaya
https://repositoriouba.sisbi.uba.ar/gsdl/cgi-bin/library.cgi?a=d&c=artiaex&d=paper_00762997_v53_n2_p251_Zelaya_oai
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AT schejterl neactaeoninaargentinanewspeciesandfamilyplacementofthegenusneactaeoninathiele1912molluscagastropoda
AT ituartec neactaeoninaargentinanewspeciesandfamilyplacementofthegenusneactaeoninathiele1912molluscagastropoda
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