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Family Cerambycidae, Spathoptera albilatera
Back in Hemilophini - think I got the right one:
Elytral plica, pronotal spines, pattern (not well seen in collection specimen), + range (SE Brasil, RJ-PR, acc. to catalogue).
mimics in Calliini lack the elytral plica:
http://www.coleoptera-neotropical.org/pa...
Best adress to look for Lampyrid mimics is Hemilophini:
http://www.coleoptera-neotropical.org/pa...
but this time, I think, it's wrong. Note pronotal spines . . .
Sergio, look how much your Cerambycid looks like a Lampyrid! http://www.projectnoah.org/spottings/199...
This is amazing! It seems to be mimicking a Lightening Beetle (Lampyridae).