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27 March 2013 A New Species of Characidium (Characiformes: Crenuchidae) from the Lower Amazon
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Characidium papachibe, new species, is described from the Rio Aruã, tributary of the Rio Tapajós basin, lower Amazon, State of Pará, Brazil. The new species can be easily distinguished from its congeners, except C. serrano and C. heirmostigmata, by the presence of anteriorly oblique, midlateral bands centered on lateral line or just ventral thereof and not reaching either the dorsum or the ventrum. Characidium papachibe is distinguished from C. serrano, C. heirmostigmata, and its psammophile congeners by the arrangement and number of the anteriorly oblique bars on the body sides, and by a simultaneous occurrence of morphometric and meristic characters. Comments about species groups are presented.

Characidium papachibe, espécie nova, é descrita do Rio Aruã, bacia do Rio Tapajós, baixo Amazonas, Estado do Pará, Brasil. A nova espécie pode ser facilmente distinguida dos congêneres, exceto C. serrano e C. heirmostigmata, pela presença de barras anteriormente oblíquas, centradas na linha lateral, não atingindo as regiões ventral ou dorsal. Characidium papachibe é distinguido de C. serrano, C. heirmostigmata e dos congêneres psamófilos pelo arranjo das barras oblíquas nas laterais do corpo e por uma ocorrência simultânea de caracteres morfométricos e merísticos. Comentários a respeito de grupos de espécies são apresentados.

2013 by the American Society of Ichthyologists and Herpetologists
Luiz Antônio Wanderley Peixoto and Wolmar B. Wosiacki "A New Species of Characidium (Characiformes: Crenuchidae) from the Lower Amazon," Copeia 2013(1), 52-57, (27 March 2013).
Received: 3 July 2012; Accepted: 1 October 2012; Published: 27 March 2013

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