second form male
One of two morphological forms of male cambarids; sexually nonfunctional male (Male insignia II) lacking corneous terminal element of first pleopod (gonopod) [Hobbs and Jass, 1988].
The sexually nonfunctional male cambarid, most easily recognized by the lack of a corneous terminal element on the first pleopod [Hobbs, Hobbs, and Daniel 1977].

Crustacea glossary. . 2011.

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