suboperculum


Also found in: Medical.

suboperculum

(ˌsʌbəʊˈpɜːkjʊləm)
n, pl -la (-lə) or -lums
(Zoology) zoology a bone in fishes behind the operculum or gill covering
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During the study comparative age determinations were performed on a total of 243 fish samples by using the operculum suboperculum preoperculum interoperculum and vertebrae bony structures.
Then bony structures (operculum suboperculum preoperculum interoperculum and vertebrae) were
The highest agreement was between operculum and suboperculum with 99.59%.
Suboperculum fully covered with cycloid scales; interoperculum fully covered by one row of cycloid scales; cheeks fully scaled; postorbital squamation with two rows of different-sized scales; size of occipital scales not significantly smaller than dorsal scales; predorsal squamation pattern irregular; cycloid and weakly ctenoid scales on dorsum rostrally, more strongly ctenoid scales increasing caudally; flanks with strongly ctenoid scales (Fig.
The genus Centropyge has been traditionally defined (see Weber and De Beaufort, 1936: 159; Fraser-Bruner, 1933) as relatively small angelfishes (usually < 10 cm SL) with the following combination of features: scales large, usually 50 or less in lateral row between upper operculum and caudal fin base, arranged in more or less regular transverse rows; interoperculum relatively small and serrate, remote from suboperculum; hindmargin of preorbital free, prominently serrate or with strong spines; interorbital width equal to or less than eye; scales on operculum in five or fewer transverse rows.