The Collaborative International Dictionary
Ophiomorpha \O`phi*o*mor"pha\, n. pl. [NL. See Ophiomorphous.] (Zo["o]l.) An order of tailless amphibians having a slender, wormlike body with regular annulations, and usually with minute scales imbedded in the skin. The limbs are rudimentary or lacking. It includes the c[ae]cilians. Called also {Gymnophiona} and {Ophidobatrachia}.
Wikipedia
Ophiomorpha is an ichnotaxon, usually interpreted as a burrow of an organism living in the near-shore environment. The burrow lining is more or less smooth on the inside, and densely to strongly mammalated or nodose on the outside, due to the packing of fecal pellets for support of the burrow. Branching is irregular but Y-shaped where present. It is often considered part of the Skolithos ichnofacies.