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not comparable
Pertaining or belonging to the arm. examples
Of the nature of an arm. examples
plural brachials
(zoology) Denoting the upper valve of a brachiopod's shell quotations
The first brachials are somewhat broader than long and are not entirely in contact interiorly. The second brachials are squarish. The first and most of the second brachials bear spines […]
1950, Austin Hobart Clark, A monograph of the existing crinoids, page 33
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