Figure 1 in Recent evolution of ancient Arctic leech relatives: systematics of Acanthobdellida

Figure 1. Photographs of Acanthobdellida species. A, B, Acanthobdella peledina from two separate grayling [Thymallus thymallus (Linnaeus, 1758)] individuals in Scandinavia. C, A. peledina on Arctic grayling [Thymallus arcticus (Pallas, 1776)] from Alaska. Circles highlight A. peledina individuals on their hosts. D, a scanning electron micrograph of Paracanthobdella livanowi emphasizes the eponymous hooks we commemorate in the new common name: hook-faced fish worms.