branchiostegal membrane
the membrane below the operculum, often attached to the isthmus, supported by branchiostegals and helping to enclose the gill chamber ventrolaterally. Branchiostegal membranes are separate when the membranes of the two sides are separate from one another and the isthmus; they are united and free from the isthmus when the membranes of the two sides are joined to one another and have a narrow or wide margin behind unattached to the isthmus; and are joined to the isthmus when they fuse to the isthmus without a free margin. Often inappropriately called the gill membrane

Dictionary of ichthyology. 2009.

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  • branchiostegal — I. |braŋkē|ästə̇gəl adjective Etymology: International Scientific Vocabulary branchi + steg + al : of or relating to the branchiostegals the branchiostegal membrane II. noun or branchiostegal ray …   Useful english dictionary

  • Branchiostegal — Bran chi*os te*gal, a. [Gr. ? gill + ? to cover: cf. F. branchiost[ e]ge.] (Anat.) Pertaining to the membrane covering the gills of fishes. n. (Anat.) A branchiostegal ray. See Illustration of {Branchial arches} in Appendix. [1913 Webster] Note:… …   The Collaborative International Dictionary of English

  • branchiostegal — Pertaining to the membrane covering the gills of fishes; this term was formerly applied to a group of fishes having boneless branchi[ae], but the arrangement was artificial and has been rejected …   Fisheries — dictionary

  • gill membrane — the tissue supported by the branchiostegals and forming the lower wall of the gill cavity. Preferably called the branchiostegal membrane, q.v …   Dictionary of ichthyology

  • Sternoptychidae — Lovely Hatchetfish, Argyropelecus aculeatus (Sternoptychinae) Scientific classification Domain: Eukary …   Wikipedia

  • Branchiostege — Bran chi*os tege, (Anat.) The branchiostegal membrane. See Illustration in Appendix. [1913 Webster] …   The Collaborative International Dictionary of English

  • gill chamber — the cavity containing the gills on each side of the rear of the head, enclosed by the operculum and the branchiostegal membrane …   Dictionary of ichthyology

  • fish — fishless, adj. /fish/, n., pl. (esp. collectively) fish, (esp. referring to two or more kinds or species) fishes, v. n. 1. any of various cold blooded, aquatic vertebrates, having gills, commonly fins, and typically an elongated body covered with …   Universalium

  • Fish — /fish/, n. Hamilton, 1808 93, U.S. statesman: secretary of state 1869 77. * * * I Any of more than 24,000 species of cold blooded vertebrates found worldwide in fresh and salt water. Living species range from the primitive lampreys and hagfishes… …   Universalium

  • Ichthyology terms — Ichthyology uses several terms that are unique to the science.Contents: A B C D E F G H I J K L M N O P Q R S T U V W X Y Z NOTOC A * Abdomen: belly * Abdominal: pertaining to the belly * Actinosts: a series of bones at the base of the pectoral… …   Wikipedia

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