Isonychus striatipennis is a species of beetle of the family Scarabaeidae. It is found in Mexico (Jalisco).
Adults reach a length of about 10âÂÂ11 mm. They are brown, but the base colour is almost entirely obscured by the dense covering of grey setae. The antennae are yellowish-red, with a blackish-brown club. On the elytra, the striae are very distinctly marked. The legs are reddish-brown and have finer and more extensive hair than the underside of the body.