Glossohyal


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Glos`so`hy´al


a.1.(Anat.) Pertaining to both the hyoidean arch and the tongue; - applied to the anterior segment of the hyoidean arch in many fishes. - n. The glossohyal bone or cartilage; lingual bone; entoglossal bone.
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Diagnosis: Epigonus marisrubri is distinguished from its congeners by the following combination of characters: dorsal-fin rays VII + I,10; anal-fin rays II,9; pectoral-fin rays 18; pored lateral line scales 48 or 49; gill rakers 10+19-20; pyloric caeca 10; vertebrae 10 + 15; 2 pterygiophores between neural spines 9 and 10; pectoral fins long, reaching level of second dorsal-fin origin; caudal fin forked; tongue with a band of 2-4 rows of densely-set teeth on glossohyal; opercle with short, poorly ossified spine and 1-2 small spinelets; otolith oval, elongate, sulcus and cristae weakly developed.
Teeth small, conical and recurved; premaxilla bearing a single row of teeth posteriorly, and 1-2 rows anteriorly, edentulous near symphysis; teeth on dentary in an irregular single row near symphysis continuing as a narrow band of 2-3 rows posteriorly; vomerine teeth larger than those on jaws, arranged in a large triangular patch; teeth on palatine arranged in a band of 2-3 rows; tongue with a band of 2-4 rows of densely-set teeth on glossohyal.
Hyobranchial apparatus: Comprising median unpaired glossohyal, basihyal, three basibranchials and urohyal; and bilaterally paired dorsal and ventral hypohyals, anterior and posterior ceratohyals, interhyal, six branchiostegal rays, three hypobranchials, five ceratobranchials, four epibranchials and three pharyngobranchials (Fig.10).