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vol.72 número2PRIMEROS REGISTROS SUDAMERICANOS DE HOLOCNEMUS PLUCHEI (SCOPOLI, 1763) Y SPERMOPHORA SENOCULATA (DUGÉS, 1836) (ARANEAE: PHOLCIDAE)CROMOSOMAS DE LA LAPA FISSURELLA LIMBATA (SOWERBY, 1835) DEL NORTE DE CHILE (ARCHAEOGASTROPODA: FISSURELLIDAE) índice de autoresíndice de materiabúsqueda de artículos
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Gayana (Concepción)

versión impresa ISSN 0717-652Xversión On-line ISSN 0717-6538

Gayana (Concepc.) v.72 n.2 Concepción  2008

http://dx.doi.org/10.4067/S0717-65382008000200014 

Documento sin título

Gayana 72(2): 266-267,2008 Comunicación breve

COMUNICACION BREVE


DIPLODON PATAGONICUS
(BIVALVIA: HYRIIDAE): TO BE OR NOT TO BE

DIPLODON PATAGONICUS (BIVALVIA: HYRIIDAE): SER O NO SER

Esperanza Parada1 & Santiago Peredo1

1Laboratorio de Limnología y Recursos Hídricos. Escuela de Ciencias Ambientales, Facultad de Recursos Naturales, Universidad Católica de Temuco, Casilla 15-D, Temuco, Chile. eparada@uct.cl


RESUMEN

Se entregan antecedentes que establecen que Diplodon patagonicus (D'Orbigny 1835) señalado como especie presente en la región Neo tropica-Patagonia por Graf & Cummins (2007) corresponde aDiplodon chilensis patagonicus (D'Orbigny 1846) (sensu Haas 1969).

Palabras claves: Diplodon chilensis patagonicus, almeja de agua dulce, Taxonomía, Región Neo tropica-Patagonia.


In the last years we have made efforts to elucidate aspects of Hyriidae taxonomy in Chile (Parada & Peredo 2002, 2006) and to inform the national and international scientific community with the aim to arrange the taxonomy of this group and give clearness in this respect to those interested on this topic.

The purpose of this communication is to correct a data reported in the article by Graf & Cummings (2007). The mentioned article is "Systematics and Global diversity of freshwater mussel species (Bivalvia:Unionoida)" published on Journal of Molluscan Studies 73:291-314 (2007). The article represents a significative contribution to the knowledge on the geographic distribution of the Unionoida species in the planet geographic regions. Nevertheless, the article erroneously reports about the presence of Diplodon patagonicus (D'Orbigny 1835) Tribe Riphidodontini, Staborogatov, 1970 in the Neotropica-Patagonia region. D'Orbigny (1846) describes Unió patagónica during his expedition to South America, from specimens collected in the bank of the Rio Negro in the Argentinean Patagonia, being this place the type locality. The specimens are deposited according to Bonetto (1973) in the British Museum. Studies carried out by Haas (1969) state that Unio patagónica (D'Orbigny 1846) is synonym of D. chilensis (Gray 1828). Haas {op cit.) determined two subspecies forD. chilensis: D. ch. chilensis which inhabits more septentrional waters from Chile and Argentina and D. ch. patagonicus which inhabits the southern area.

To the present, reports by Bonetto (1973) and Parada & Peredo (2002,2006) (the second one, cited by Graff & Cumming 2007) have dilucidated the synonymy of D. chilensis and the nonexistence of D. patagonicus in Chile and Argentina in opposition to the report of Graff & Cumming (2007).

New reports on freshwater mollusc of Argentina pointed out the existence of 11 species of Diplodon Spix, 1827 genus. Three of them belonging to the subgenus Riphidodonta and 8 to the subgenus Diplodon. In the latter is included D. (D.) chilensis and does not include D. patagonicus as a species present inArgentina (Rumie/ al. 2008). In Chile, Parada & Peredo (2002) report the existence of D. chilensis, with 26 synonymies. Letelier & Ramos (2006) and Parada et al. (2007) report the present distribution range for this species from Limari river (30°28'S; 71o05'W)tothelakeDiana(51o50'13"S;72o9'35"W), both limits corresponding to D. chilensis chilensis.

Respect to D. ch. patagonicus, Parada & Peredo (2002, 2006) report that there no records of its presence since Haas report (1969) in Chile, neither are in the Chilean Natural History Museum (Letelier & Ramos 2006).

Rumi etal. (2008) report the presence of D. chilensis in the Argentinean areas of Mendoza, Neuquén, Río Negro and Chubut, but do not report subspecies. From afore mentioned, it can be concluded that D. patagonicus does not constitute a species, but a subspecies of D. chilensis (Gray 1828) even thought there are no reports of it since the last decades.

ACKNOELEDGMENTS

Thanks are due to Dirección General de Investigación y Postgrado from UCT for financial support which has allowed to gain knowledge on Hyriidae.


BIBLIOGRAPHY

Bonetto, A. A. 1973. Estudio Revisivo de las Colecciones de Náyades de D'Orbigny existentes en el Museo Británico. Sociedad Científica Argentina 1:17-25.        [ Links ]

D'Orbigny, A. 1846. Voyage dans l'Amerique Méridionale.V Mollusques. París.        [ Links ]

Graf, D.L. & K. Cummings. 2007. Sistematics and Global Diversity of Freshwater Mussel Species (Bivalvia:Unionoida). Journal of Molluscan Studies 73:291-314.        [ Links ]

Haas, F. 1969. Superfamilia Unionacea. Das Tierreich (Berlin) Lieferung 88, Seite I-X: 1-663.

Letelier, S. &A.M. Ramos. 2006. Distribución geográfica de Diplodon (Diplodon) chilensis (Gray, 1828)(Bivalvia:Hyriidae) basado en el material de la colección del Museo Nacional de Historia Natural (MNHNCL), Santiago de Chile. Amici Molluscarum 14:13-17.        [ Links ]

Parada, E. & S. Peredo. 2002. Estado actual de la taxonomía de bivalvos dulceacuícolas chilenos: progresos y conflictos. Revista Chilena de Historia Natural 75:691 -701.        [ Links ]

Parada, E. & S. Peredo. 2006. Estado de conocimiento de los bivalvos dulceacuícolas de Chile. Gayana 70(1): 82-87.        [ Links ]

Parada, E. & S. Peredo, J. Valenzuela & D. Manuschevich. 2007. Extention of the current northern distribution range of freshwater mussel Diplodon chilensis (Gray, 1828) (Bivalvia:Hyriidae) in Chile. Gayana 71(2):212-215.        [ Links ]

Rumi, A., G. DE Gutiérrez, V. Núñez & GA. Darrigan. 2008. Malacología Latinoamericana. Moluscos de agua dulce de Argentina. Revista Biología Tropical 56(1 ):77-l 11.        [ Links ]

Recibido: 15.08.08

Aceptado:08.10.08

 

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