from The American Heritage® Dictionary of the English Language, 4th Edition

  • adj. Shaped like or having a carina or keel; ridged.

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • adj. Keel-shaped, as in a boat's keel.
  • adj. Of a bird, having a keeled breastbone allowing the attachment of flight muscles.

from the GNU version of the Collaborative International Dictionary of English

  • adj. Shaped like the keel or prow of a ship; having a carina or keel.

from The Century Dictionary and Cyclopedia

  • Shaped like or furnished with a keel; keeled.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

  • n. birds having keeled breastbones for attachment of flight muscles
  • adj. having a ridge or shaped like a ridge or suggesting the keel of a ship


from Wiktionary, Creative Commons Attribution/Share-Alike License

Latin carinatus, from carina ("keel").


  • In my mind, "carinate" means that there is a distinct thickening of the shell carbonate along the perifery, not just a sharp change in curvature angular.

    Anguispira alternata angulata

  • More or less everything we currently know about this snail is in Anderson & Smith A redescription of the carinate pillsnail, Euchemotrema hubrichti (Pilsbry, 1940) (Pulmonata:Polygyridae), with notes on habitat and genetics.

    Euchemotrema hubrichti

  • They showed that the long-snouted species M. superciliosus and M. leedsi had rather straight, robust, blunt-tipped teeth that belonged to the ‘crunch’ feeding guild, while broad-skulled species like M. cultridens had slender, slightly compressed, carinate teeth (carinae = cutting edges) that belonged to the ‘pierce’ guild.

    Archive 2006-07-01

  • Excuse me, they retain the carinate morphs when adult too, or does that coalesces as long as they grow on?

    Mysterious snails of the Potomac

  • These ideas lead me to form a hypothesis that typical A. alternata might be going the way of the frogs becomming less common due to some factor, while the carinate form of A. alternata might be surviving in its typically low numbers, but now that might be all we are finding.

    Anguispira alternata angulata

  • By the way, Stephanie Clutts, student of Andy Anderson at Southern Illinois University, is examining the DNA of all the species of Anguispira and I am hopeful that she will be able to address the relationship between the typical and carinate forms of A. alternata.

    Anguispira alternata angulata

  • Furthermore, I have an impression (needs further research!) that A. alternata typical form is the dominant form among older museum collections, while the modern specimens I find are more carinate and even slightly keeled (to me carina means corner - so a sharper part of the curve - while keeled means an actual bump outward like the keel of a ship).

    Anguispira alternata angulata

  • "Keeled" seems to cover both carinate and angular see Burch, 1962 p. 14 and p.

    Anguispira alternata angulata

  • All other existing birds belong to the second division, and are called (from the keel on the breast-bone) _carinate_ birds.

    On the Genesis of Species

  • These bones are such remarkable anticipations of the same parts in ordinary (_i. e._ carinate) birds {71} that it is hardly possible for a Darwinian not to regard the resemblance as due to community of origin.

    On the Genesis of Species


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  • keeled, having a ridge along the middle line

    June 12, 2007