Ossicles were defined as very small bony structures, including scales, tubercles, lateral-line
elements, and swivel-joint platelets, usually overlooked or given only a cursory treatment in morphological studies of fishes.
ocasoensis, by the number of pored lateral-line
scales (eight to 12 vs.
Gross morphology and evolution of the mechanoreceptive lateral-line
system in teleost fishes.
Among them was that blind cave fish use lateral-line
information to build spatial maps of their surroundings.
differs from Sparidentex hasta and from nominal species placed within the genus Sparidentex, by the following combination of characters: body depth 37-41% , head length 33-38% caudal peduncle length 18-20% in standard length; 3 1/2 scale rows between the 5th dorsal-fin spine base and lateral-line
, 3 1/2 scale rows between the9th dorsal-fin spine base and lateral-line
, second anal-fin spine distinctly stouter and longer than third spine ratio of2nd anal-fin spine and 3rd anal-fin spine is 1.
palomae by the presence of a circular humeral spot that does not pass ventrally below the lateral-line
canal, and has a only a diffuse, inconspicuous vertical extension (vs.
scales 42; dorsal fin continuous, with ninth dorsal spine shorter than tenth spine; longest dorsal soft ray (7th or 8th) 2.
intermedius differ in number of lateral-line
scales, caudal pigmentation, size of the scapular blotch, and shape of the anterior-nostril flap.
Other significant counts and characters include the following: dorsal-fin spines XIII, dorsal-fin rays 13; anal-fin spines III, anal-fin rays 6; pectoralfin rays 18, 18; lateral-line
pores 28+1, lateralline scales 47; total gill rakers 27 (7 + 20); second anal-fin spine about the same length as third spine; nasal, preocular, supraocular, postocular, tympanic, parietal, and nuchal head spines present, all relatively strong and sharp; lower edge of opercle smooth, spines absent; posterior edge of maxilla terminating at posterior rim of orbit; mandible scaled; lachrymal protrusions strong, rounded; symphyseal knob weak.
canal posterior to the head extends along the trunk to the end of the caudal peduncle.
The organ that makes this possible is the lateral-line
system, which registers changes in currents and even smaller disturbances, providing backup support for the sense of sight particularly in dark or muddy waters.
Pectoral-fin ray and lateral-line
counts were made on the left side.