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Comparative morphology and systematics of the cookiecutter sharks, genus Isistius Gill (1864) (Chondrichthyes: Squaliformes: Dalatiidae)

Fig 18

Ventral view of mouth region of Isistius plutodus (HUMZ 210817).

Abbreviations: gm, gum; lf, lip fold; lpc, upper lip cover; slc, fleshy sack for the upper labial cartilages.

Fig 18

doi: https://doi.org/10.1371/journal.pone.0201913.g018