cecomorphæ

from The Century Dictionary.

• A superfamily group of palmiped schizognathous carinate birds, including the short-winged, long-winged, and tube-nosed swimming and diving birds of the current orders Pygopodes, Longipennes, and Tubinares, or the Alcidæ, Colymbidæ, Podicipedidæ, Procellariidæ, and Laridæ.