petalostichous

petalostichous, a. Zool.

(pɛtəˈlɒstɪkəs)

[f. mod.L. Petalosticha, neut. pl. of petalostichus (f. Gr. πέταλ-ον leaf + στίχος row) + -ous.]

Having petaloid ambulacra; belonging to the division Petalosticha of Echinoids.