- horizontal septum
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1) a sheet of connective tissue separating the epaxial and hypaxial muscle masses. Also called horizontal myoseptum2) the lateral midline when referring to pigmentation in larval fishes
Dictionary of ichthyology. 2009.
horizontal septum
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Septum — A word borrowed from the Latin "saeptum" meaning a "dividing wall or enclosure." * * * 1. [TA] A thin wall dividing two cavities or masses of softer tissue. See septal area, transparent s.. 2. In fungi, a wall; usually a cross … Medical dictionary
septum papillaris — a division of the pupil or eye. In Osteoglossum the septum is horizontal permitting simultaneous vision over and beneath the water surface … Dictionary of ichthyology
Nasal septum — Bones and cartilages of septum of nose. Right side. Latin septum nasi Gray s … Wikipedia
muscle — muscleless, adj. muscly, adj. /mus euhl/, n., v., muscled, muscling, adj. n. 1. a tissue composed of cells or fibers, the contraction of which produces movement in the body. 2. an organ, composed of muscle tissue, that contracts to produce a… … Universalium
rib — one of a series of long, thin bony rods articulating with the apophyses of the vertebrae and supporting the trunk musculature. The ventral ends are free. They consist of two types: the dorsal, epipleural or true ribs which arise from the… … Dictionary of ichthyology
bivalve — bivalvular /buy val vyeuh leuhr/, adj. /buy valv /, n. 1. Also called lamellibranch. Zool. any mollusk, as the oyster, clam, scallop, or mussel, of the class Bivalvia, having two shells hinged together, a soft body, and lamellate gills. adj. 2.… … Universalium
epaxial — any structure morphologically dorsal to the horizontal plane of the notochord or vertebral column; body muscles above the horizontal septum … Dictionary of ichthyology
Hypaxial — Trunk muscles can be broadly divided into hypaxial muscle, which lie ventral to the transverse processes of the vertebrae and epaxial muscles, which lie dorsal to the transverse process of the vertebrae. Hypaxial muscles include some vertebral… … Wikipedia
dorsal rib — epipleural bone (rib)(one of a series of bones found in the horizontal septum (separating the upper and lower muscle masses of the body epaxials and hypaxials). Epipleural ribs may be associated with the anterior pleural ribs, e.g. in Perca or… … Dictionary of ichthyology
epipleural bone — (rib) one of a series of bones found in the horizontal septum (separating the upper and lower muscle masses of the body epaxials and hypaxials). Epipleural ribs may be associated with the anterior pleural ribs, e.g. in Perca or with the vertebra … Dictionary of ichthyology
