A new species of the deep-sea ceratioid anglerfish genus Lasiognathus Regan (family Thaumatichthyidae) is described from a single female specimen collected in the eastern north Atlantic Ocean off Madeira. It is most similar to Lasiognathus saccostoma Regan but differs from this species and from its remaining congeners, Lasiognathus beebei Regan and Trewavas, Lasiognathus waltoni Nolan and Rosenblatt, and Lasiognathus intermedius Bertelsen and Pietsch, in having only two bony hooks in the esca. The new species is diagnosed and described, and a revised key to the species is provided.

The American Society of Ichthyologists and Herpetologists
2005
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