Ophryotrocha longicollaris

Ophryotrocha longicollaris is a species of polychaete worm, first found on deep sea whale fall and wood fall habitats in the north-east Pacific, off the southern Californian coast. This species and Ophryotrocha magnadentata are sister species; together with O. nauarchus and O. flabella, it falls in a clade including O. globopalpata and Exallopus jumarsi from the shallow North Atlantic.