Darkling Beetle

Found at Ecolodge Itororó reserve, in/near Nova Friburgo municipality in state of Rio de Janeiro in southeastern Brazil.

 

I think probably Strongylium, but could not find a good match for this distinctive elytral surface sculpturing.

 

Single exposure, uncropped, handheld, in situ. Canon MT-24EX flash unit, Ian McConnachie diffuser.

Done