Abbott, D.P.; Trason, W.B. (1968). Ritterella rubra and Distaplia smithi: two new colonial ascidians from the west coast of North America. Bull. South. Calif. Acad. Sci. 67(3): 143-154.
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Abbott, D.P.; Trason, W.B.
1968
Ritterella rubra and Distaplia smithi: two new colonial ascidians from the west coast of North America