dolon

plural dolons

1. A specialized elongated hollow structure that forms part of the carapace of a marine organism from the class Ostracoda, used for various purposes, such as locomotion, feeding, or sensory perception.

   In both cases the histial dolon is united anteriorly with the velar dolon and both genera are also similar in being unisulcate .

   2011, N. Ikeya, K. Ishizaki, T. Hanai, Evolutionary Biology of Ostracoda, page 1045

   2 more examples

   In forms with a modified outer antral fence, both this and the adjacent distal band of the domiciliar wall may be concave and form the antrum (Figs. 6 J-K; 7 B), and in some forms the antrum apparently is formed by the dolon alone (dolonal antrum).

   1964, GFF - Volume 86, page 343

   Velum occurs as a narrow, rounded ridge forming the valve margin in lateral view, continuous posteriorly as the dolon in females.

   1991, Peter Colley Sylvester-Bradley, David J. Siveter, A Stereo-atlas of Ostracod Shells - Volume 18, Part 1, page 4