| Summary: | Figure 4. Maximum likelihood phylogeny of Acanthobdellida (starred node). A, B, Majority rule consensus of 1000 bootstraps (log likelihood = −70 595.750). The entire phylogeny (A) shows Acanthobdellida as sister to Hirudinida (leeches). Taxa with multiple representative taxa are collapsed to triangles, with the length of the triangle corresponding to the maximum branch length from the base of the clade to the tips. The starred clade from A is expanded to show all Acanthobdellida individuals (B). The Alaskan (AK) and Nordic (NOR) Acanthobdella peledina populations form distinct clades. C–E, inset images show photographs of overall morphology of medium-sized specimens (C), scanning electron micrographs of the fifth row of chaetae (D) and silhouettes of chaetae from the first chaetal row (E). For all inset images, species are indicated using 'A' for A. peledina and 'P' for Paracanthobdella livanowi. Published as part of Carle, Danielle Božena De, Gajda, Łukasz, Bielecki, Aleksander, Cios, Stanisław, Cichocka, Joanna M., Golden, Heidi E., Gryska, Andrew D., Sokolov, Sergey, Shedko, Marina Borisowna, Knudsen, Rune, Utevsky, Serge, Świątek, Piotr & Tessler, Michael, 2022, Recent evolution of ancient Arctic leech relatives: systematics of Acanthobdellida, pp. 149-168 in Zoological Journal of the Linnean Society 196 on page 158, DOI:10.1093/zoolinnean/zlac006, http://zenodo.org/record/7037718
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