Definition of "exotomous"

This genus has the general appearance of locrinus but differs in the strictly exotomous character branching of the arms and in the absence of an indentation each of the radials.

1939, University of Texas at Austin. Bureau of Economic Geology, Contributions to Geology, page 144

Cup conical, weakly developed basal flange, six arms per ray, one exotomous branching, all brachials biserial within two to five brachials of branching, cup ornamentation probably striae radiating from base of arms onto basals.

1997, Gary D. Webster, David D. Gillette, Lower Carboniferous Echinoderms from Northern Utah and Western Wyoming, page 14