Russell R.Hopcroft and Bruce H.Robison

Journal of Plankton Research, Volume 21, Issue 10, 1 October 1999, Pages 1923–1937, doi:10.1093/plankt/21.10.1923

A new mesopelagic larvacean, Mesochordaeus erythrocephalus, sp. nov., from Monterey Bay, with a description of its filtering house

House is ~30cm ø; ~2 tail beats per s. Heavily pigmented digestive tract. “Although we are inclined to ally this genus most closely to Bathochordaeus, we note several features that raise questions with regard to its placement within the subfamily Bathochordaeinae (represented only by the genus Bathochordaeus) as opposed to the Oikopleurinae.”