adambulacraladj.n.

1854 J. Müller in Ann. & Mag. Nat. Hist. 13 113 Those which rest upon the external processes of the ambulacral plates have a certain peculiarity as marginal plates of the ambulacra or adambulacral plates.

1882 Jrnl. Linn. Soc. 16 204 The ambulacral spines that form the comb belonging to the first adambulacral plate have their bases arranged in a semicircular curve.

1914 Philos. Trans. (Royal Soc.) B. 205 217 The adambulacral ossicles are irregularly or alternately diplacanthid and monacanthid, that is, provided with a single spine or with two spines each.

1960 D. C. Braungart & R. Buddeke Introd. Animal Biol. (ed. 5) viii. 100 The lower ends of these pairs rest at the borders of the groove on a series of ossicles, the adambulacral ossicles.

1998 Jrnl. Paleontol. 72 517 (caption) Inclined ventral and dorsal views of disk region, spines along adambulacral rows.

1857 Ann. & Mag. Nat. Hist. 20 334 Portion of ditto [sc. the lower surface], magnified, showing the large adambulacrals and their basal ossicles.

1900 E. R. Lankester Treat. Zool. III. 75 Each adambulacral bears a brachiole-facet; there are about 36 in each ray.

1946 H. Woods Palæontol. Invertebr. (ed. 8) 120 Each [ambulacral] groove is formed by two rows of ossicles (the ambulacral ossicles..) which meet at an angle making an arch, and is bordered on each side by another row of ossicles, the adambulacrals.

1978 Jrnl. Palaeontol. 52 158/2 The axial portion of each adambulacral seems to remain essentially the same shape.

2010 Geobios 43 180 Ambulacrals are exposed, and limited data are available for the adambulacrals and parts of the jaw frame.