Fig. 1

Grimpoteuthis imperator sp. nov. ZMB MOLL 240160. a–c Habitus before fixation showing dorsal, ventral, and oral views, anterior facing up. d, e Specimen prior to MRI following several months in 10% formalin solution showing dorsal and ventral views, anterior facing up. Stippled frame denotes the MRI region of interest. f Virtual section through the 3D MRI dataset, anterior facing right. The asterisk denotes a susceptibility artefact in the buccal mass area caused by ingested sediment. g Virtual section through the central long axis of the funnel. h Section of an arm showing the suckers and cirri, right lateral view. i Volume rendering of the viscera, ventral view, anterior facing up. j Close-up of the left gill showing eight broad lamellae. k Volume rendering of the viscera, oblique posterior view