摘要

Jainus piava n. sp. is described from the gills of Schizodon borellii (Boulenger, 1900) (Characiform), commonly named as piava from the upper Paran芍 River floodplain, Brazil. The new species differs from the other members of Jainus in the following features: ventral bar thin broadly V-shaped and male copulatory organ (MCO) a coil of about 1.5 rings. Jainus piava n. sp. is similar to species of Jainus by having a ventral anchor base with flattened superficial root and elongate rodlike deep root. Jainus piava sp. nov 谷 descrito para branquias de Schizodon borellii(Boulenger, 1900) (Chacariformes) comumente chamado de piava na plan赤cie de inunda o do alto rio Paran芍, Brasil. A nova esp谷cie difere de outros membros de Jainus pelas seguintes caracter赤sticas: barra ventral fina levemente em forma de V e 車rg o copulat車rio masculino (MCO) com cerca de uma volta e meia de diametro do anel. Jainus piava sp. nov 谷 similar a outras esp谷cies do g那nero Jainus por ter a ancora ventral com uma raiz superficial com extens o alongada.

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