The pleural ribs absent; one hypural plate, without slit. Head depth slightly exceeds its width. Mouth terminal. Teeth simple. The near mouth pores are small, round; the chin pores are not adjacent. The gill opening is small. The disk is small, oval, the edge border is narrow, chondral. The disk-anus distance exceeds the disk length by two times. The entire body is densely echinated with very small spinules. The body and the peritoneum are black, the stomach is light with black blood vessels (Ref. 27679).