spiracular cleft
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spiracular grooves — see spiracular cleft … Dictionary of invertebrate zoology
meatal cleft — (ARTHROPODA: Insecta) A slit or line on the trumpet of some mosquito pupae extending into the meatus from the spiracular opening, facilitating enlargement of the opening at the surface of the water … Dictionary of invertebrate zoology
spiracle — a vestigial gill cleft between the eye and the gill slits in Elasmobranchii, Acipenseridae, Polyodontidae, and Polypteridae. Water for respiration is inhaled through the spiracles in Rajiformes. Connects with the gill cavity; often retains… … Dictionary of ichthyology
chondrichthian — /kon drik thee euhn/, n. any member of the class Chondrichthyes, comprising the cartilaginous fishes. [ < NL, equiv. to chondr CHONDR + Gk ichthýes (pl.) fish] * * * ▪ fish class Introduction class name Chondrichthyes, or Selachii any… … Universalium
