Nacellidae limpets of the southern end of South America: taxonomy and distribution

Taxonomically, the Mollusca of the southern end of South America are moderately well known, but the literature is scattered, there is little information on their habitats, and distributional records are scarce for the Chilean archipelago lying between Chiloé Island (42° S) and Tierra del Fuego (55°...

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Autores principales:	VALDOVINOS,CLAUDIO, RÜTH,MAXIMILLIAN
Lenguaje:	English
Publicado:	Sociedad de Biología de Chile 2005
Materias:	Nacellidae Nacella Patinigera Chile taxonomy distribution
Acceso en línea:	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-078X2005000300011
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spelling	oai:scielo:S0716-078X20050003000112005-10-28Nacellidae limpets of the southern end of South America: taxonomy and distributionVALDOVINOS,CLAUDIORÜTH,MAXIMILLIAN Nacellidae Nacella Patinigera Chile taxonomy distribution Taxonomically, the Mollusca of the southern end of South America are moderately well known, but the literature is scattered, there is little information on their habitats, and distributional records are scarce for the Chilean archipelago lying between Chiloé Island (42° S) and Tierra del Fuego (55° S). Although much is known about the biology and ecology of of some species of Nacellidae, the taxonomy of the group have been partially neglected, particularly in remote areas of the world such as the Chilean fjords. Therefore, this study aims to clarify the nomenclatural status, and establish the morphological characteristics and distribution of the Chilean Nacellidae. Especially, the following three objectives are pursued: (i) to clarify the correct identity of existing species; (ii) to describe of morphological details, highlighting the clear diagnostic characters of each species, and (iii) to delimitate and discuss their geographical range in Chile. The examination of the Nacellidae of the Chilean fiords has resulted in the recognition of one species of Nacella (Nacella) and seven species of Nacella (Patinigera), wherein the principal specific differences are in the shell (shape, thickness and color) and in radular teeth morphology. The genus Nacella and its subgenus Patinigera are cold-water limpets, and are exclusively inhabitants of Subantarctic and Antarctic waters. The greater part of their range being subantarctic, but extending to the Antarctic by way of the Scotia Arc, and also ranging northward up the Chilean coast to at least Valparaiso at 33° S (only N. (P.) clypeater). They apparently have their centre of distribution in the Magellanic Province of southern South America, corresponding to an area with a high degree of diversification (N. (N.) mytilina, N. (P.) chiloensis, N. (P.) deaurata, N. (P.) delicatissima, N. (P.) flammea, N. (P.) magellanica, N. (P.) venosa), wherefrom the species tends to spread eastward, with a larval transport probably assisted to a considerable extent by the prevailing West Wind Drift which strongly operates in the Subantarctic Zoneinfo:eu-repo/semantics/openAccessSociedad de Biología de ChileRevista chilena de historia natural v.78 n.3 20052005-09-01text/htmlhttp://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-078X2005000300011en10.4067/S0716-078X2005000300011
institution	Scielo Chile
collection	Scielo Chile
language	English
topic	Nacellidae Nacella Patinigera Chile taxonomy distribution
spellingShingle	Nacellidae Nacella Patinigera Chile taxonomy distribution VALDOVINOS,CLAUDIO RÜTH,MAXIMILLIAN Nacellidae limpets of the southern end of South America: taxonomy and distribution
description	Taxonomically, the Mollusca of the southern end of South America are moderately well known, but the literature is scattered, there is little information on their habitats, and distributional records are scarce for the Chilean archipelago lying between Chiloé Island (42° S) and Tierra del Fuego (55° S). Although much is known about the biology and ecology of of some species of Nacellidae, the taxonomy of the group have been partially neglected, particularly in remote areas of the world such as the Chilean fjords. Therefore, this study aims to clarify the nomenclatural status, and establish the morphological characteristics and distribution of the Chilean Nacellidae. Especially, the following three objectives are pursued: (i) to clarify the correct identity of existing species; (ii) to describe of morphological details, highlighting the clear diagnostic characters of each species, and (iii) to delimitate and discuss their geographical range in Chile. The examination of the Nacellidae of the Chilean fiords has resulted in the recognition of one species of Nacella (Nacella) and seven species of Nacella (Patinigera), wherein the principal specific differences are in the shell (shape, thickness and color) and in radular teeth morphology. The genus Nacella and its subgenus Patinigera are cold-water limpets, and are exclusively inhabitants of Subantarctic and Antarctic waters. The greater part of their range being subantarctic, but extending to the Antarctic by way of the Scotia Arc, and also ranging northward up the Chilean coast to at least Valparaiso at 33° S (only N. (P.) clypeater). They apparently have their centre of distribution in the Magellanic Province of southern South America, corresponding to an area with a high degree of diversification (N. (N.) mytilina, N. (P.) chiloensis, N. (P.) deaurata, N. (P.) delicatissima, N. (P.) flammea, N. (P.) magellanica, N. (P.) venosa), wherefrom the species tends to spread eastward, with a larval transport probably assisted to a considerable extent by the prevailing West Wind Drift which strongly operates in the Subantarctic Zone
author	VALDOVINOS,CLAUDIO RÜTH,MAXIMILLIAN
author_facet	VALDOVINOS,CLAUDIO RÜTH,MAXIMILLIAN
author_sort	VALDOVINOS,CLAUDIO
title	Nacellidae limpets of the southern end of South America: taxonomy and distribution
title_short	Nacellidae limpets of the southern end of South America: taxonomy and distribution
title_full	Nacellidae limpets of the southern end of South America: taxonomy and distribution
title_fullStr	Nacellidae limpets of the southern end of South America: taxonomy and distribution
title_full_unstemmed	Nacellidae limpets of the southern end of South America: taxonomy and distribution
title_sort	nacellidae limpets of the southern end of south america: taxonomy and distribution
publisher	Sociedad de Biología de Chile
publishDate	2005
url	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-078X2005000300011
work_keys_str_mv	AT valdovinosclaudio nacellidaelimpetsofthesouthernendofsouthamericataxonomyanddistribution AT ruthmaximillian nacellidaelimpetsofthesouthernendofsouthamericataxonomyanddistribution
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Nacellidae limpets of the southern end of South America: taxonomy and distribution

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