>Pterinotus akkation is sinonimous of Pterinotus tripterus ?
No, Pterynotus akation Vokes, 1993 is a valid species from Western Asutralia.
It grows to 44 mm and is similar to a small version of acanthopterus.
There is a good illustration in Wilson, 1994
John Wolff
2640 Breezewood Dr.
Lancaster, PA 17601, U.S.A