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Thanks HH. I guess this is a situation where you really need both materials in hand to compare. Not sure if there's enough evidence here to make this work chasing up.

Any other photos of the denticetopsis and helogenes?

Here's a smaller . Only other pictures of are slightly more out-of-focus shots of the same fish.

racoll wrote:

Cetopsis coecutiens

(channel of main river)

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Cetopsis oliveirai

(channel of main river)

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Leptodoras copei

or Leptodoras cf. copei (channel of main river)

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The whale catfish or candiru acu reminds me of River Monsters.