Figure 8 in Recent evolution of ancient Arctic leech relatives: systematics of Acanthobdellida

Figure 8. Scanning electron micrographs showing details of the anterior body region. A, B, first and second rows of chaetae in small Acanthobdella peledina (5 mm; Sweden; A) and small Paracanthobdella livanowi (3.5 mm; Kamchatka; B). C, D, third, fourth and fifth rows of chaetae in medium-sized A. peledina (7 mm; Sweden; C) and P. livanowi (6 mm; Kamchatka; D). E, F, chaetae from the fifth row of medium-sized A. peledina (6 mm; Sweden; E) and medium-sized P. livanowi (6 mm; Kamchatka; F). Arrow indicates mouth opening; Arabic numerals 1–5 indicate rows of chaetae; c, putative chemoreceptors; d, deepening between pairs of chaetae.