Synaphobranchus dolichorhynchus (Lea, 1913)

– No common name; ②

This species is reported to occur off the Azores, in the PECS area (85 NM northwest of the Marsala Seamount), Scientific results of the Michael Sars North Atlantic Deep-Sea Expedition 1910, Sta. 53, 33.0166º W, 34.9833º N, depth 150 m. Known from larval specimens, adults not known (Eschmeyer 2013).