Mesochordaeus

Mesochordaeus is a genus of oikopleurid larvacean, related to Bathochordaeus.

Description
Mesochordaeus is a comparatively large larvacean, with a tail length reaching up to 50 mm. The genus is characterized by its large spiracles.

Distribution
Two species are known. Mesochordaeus bahamasi has been reported in the Atlantic Ocean near the Bahamas, while Mesochordaeus erythrocephalus has been found in Monterey Bay, California, sharing this habitat with its relative Bathochordaeus.