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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Detalles Bibliográficos
Autores principales: Zelaya, D.G., Schejter, L., Ituarte, C.
Formato: Artículo publishedVersion
Lenguaje:Inglés
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
Aporte de:
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
id paperaa:paper_00762997_v53_n2_p251_Zelaya
record_format dspace
spelling paperaa:paper_00762997_v53_n2_p251_Zelaya2023-06-12T16:45:55Z Neactaeonina argentina, new species, and family placement of the genus Neactaeonina thiele, 1912 (Mollusca: Gastropoda) Malacologia 2011;53(2):251-263 Zelaya, D.G. Schejter, L. Ituarte, C. Acteonidae Gastropoda Neactaeonina Southern Ocean Acteon Acteonidae Cingulata Gastropoda Mollusca 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. 2011 info:eu-repo/semantics/article info:ar-repo/semantics/artículo info:eu-repo/semantics/publishedVersion application/pdf eng info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar http://hdl.handle.net/20.500.12110/paper_00762997_v53_n2_p251_Zelaya
institution Universidad de Buenos Aires
institution_str I-28
repository_str R-134
collection Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
language Inglés
orig_language_str_mv eng
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
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AT schejterl neactaeoninaargentinanewspeciesandfamilyplacementofthegenusneactaeoninathiele1912molluscagastropoda
AT ituartec neactaeoninaargentinanewspeciesandfamilyplacementofthegenusneactaeoninathiele1912molluscagastropoda
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