hyomandibular


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hyomandibular

[¦hī·ō‚man′dib·yə·lər]
(vertebrate zoology)
The upper portion of the hyoid arch in fishes.
References in periodicals archive ?
The second is the hyoid arch which, in these organisms, consists only of the hyomandibular cartilage, articulated to the neurocranium and the mandible.
ACVF, anterior cerebral vein foramen; AFPC, anterior foramen for preorbital canal; ANTO, antorbital condyle; ELF, endolymphatic foramen; ES, eye stalk; ESAF, efferent spiracular artery foramen; F, fontanelle; FM, foramen magnum; ICAF, internal carotid artery; LC, lateral commissure; NC, nasal capsule; OC, occipital condyle; OF, orbital fissure; PFPC, posterior foramen for preorbital canal; PLF, perilymphatic foramen; PROP, preorbital process; POST, postorbital process; R, rostrum; SOC, supraorbital crest; II, optic nerve foramen; IV, trochlear nerve foramen; VII, hyomandibular branch of facial nerve foramen; X, vagus nerve foramen.
Fourth, fifth and sixth infraorbitals short and narrow, covering posterior margin of hyomandibular.
The hyoid arch musculature was originally innervated by the post-trematic branch of the facial nerve (cranial nerve VII, the hyomandibular nerve).
Mainly, it developed a complexity of musculature that allowed the quadrate, articular, and hyomandibular bones to migrate to the middle ear.
On the hyomandibular clefts and pseudobranchs of Lepidosterous and Amia.
It has minute, inconspicuous hyomandibular pores behind the eye.
These synapomorphies are: mesocoracoid arch absent (104: 0 [right arrow] 1, occurring in some groups outside of this clade C22 and reverted inside of it in Osmerus + Plecoglossus); presence of peculiar, prominent hyomandibular lateral spur at or below the level of the opercular process (196: 0 [right arrow] 1, within the fishes examined, occurring exclusively in the taxa of this clade C22 and only reverted in Stokellia + Retropinna).
The hyomandibulosymplectic cartilage, consisting of cartilaginous precursors to the hyomandibular and symplectic, is visible at 5 DPH.
Megalops, it might seem that there two hyomandibular cartilaginous heads for the neurocranium, these cartilaginous structures are in fact continuous).
It affects the dental and hyomandibular bones, which bend ventrally up to 90 [degrees] of their normal position.