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respectively Spanish and Portuguese terms for river. For those not listed here, see under the second element of the name. Thus, for Río Lerma, see LermaLerma
, river, c.350 mi (560 km) long, rising in Mexico state, central Mexico. It flows NW and W through Guanajuato state to Lake Chapala, crossing the part of the central plateau known as the Anáhuac.
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Rio de Janeiro

, Rio
1. a port in SE Brazil, on Guanabara Bay: the country's chief port and its capital from 1763 to 1960; backed by mountains, notably Sugar Loaf Mountain; founded by the French in 1555 and taken by the Portuguese in 1567. Pop.: 11 469 000 (2005 est.)
2. a state of E Brazil. Capital: Rio de Janeiro. Pop.: 14 724 475 (2002). Area: 42 911 sq. km (16 568 sq. miles)
References in periodicals archive ?
Relación entre las comunidades vegetales de los neoecosistemas de albardon y la heterogeneidad ambiental del bajo delta del río Paraná: tendencias sucesionales y proyección sobre la composición futura.
Uso antrópico potencial de las especies vegetales nativas y naturalizadas del Bajo delta del río Paraná.
Las especies invasoras exóticas en los sistemas de Humedales: el caso del delta Inferior del río Paraná.