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Postocular

   Also found in: Wikipedia 0.01 sec.
Post`oc´u`lar
a. & n.1.(Zool.) Same as Postorbital.


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borealis reach 10 cm standard length and lack distinct postocular spines, possess a long cirrus at the base of the nasal spine, the first or second dorsal-fin spines are not longer than the third or fourth, and the two rows of ctenoid scales below the dorsal fins extend onto the caudal peduncle (Bolin, 1936; Mecklenburg et al.
Nasal, preocular, supraocular, postocular, tympanic, coronal, parietal, and supratemporal spines invariably present; all major head spines strong, except for coronal spines, which are weak; supraocular and postocular spines and parietal ridge often rough; sphenotic spines often prominent, occasionally moderate or small in size.
Nonstandard measurements are the following: distance from mandible to anus (from anterior tip of mandible to center of anus); distance from anus to anal-fin origin (from center of anus to anal-fin origin); interorbital width (measured between upper margins of eyes); postocular head length (distance from posterior margin of eye to tip of opercular flap).
 
 
 
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