Dactylusとは 意味・読み方・使い方

語源

Unadapted borrowing from Latin dactylus. Doublet of dactyl and date.

名詞

dactylus (plural dactyli)

1. Synonym of dactyl (“type of metrical foot”).
2. (marine biology) The tip of a cephalopod's tentacle club
   • 1982 April, Clyde F.E. Roper, Kenneth J. Boss, “The Giant Squid”, in Scientific American, volume 246, number 4, →JSTOR, pages 96–105:

     The distal end of the club, the dactylus (finger), is pointed and attenuated but is covered with hundreds of small suckers.

   • 2001 June, N. Neethiselvan, “A new species of cuttlefish Sepia ramani sp. nov. (Class: Cephalopoda) from Tuticorin Bay, southeast coast of India”, in Indian Journal of Marine Sciences, volume 30, number 2, pages 81–86:

     […] suckers of carpus and dactylus portions small […]

3. (carcinology) The tip of a crustacean's leg
   • 1975 November, Takahiro Fujino, “Fine features of the dactylus of the ambulatory pereiopods in a bivalve-associated shrimp, Anschistus miersi (De Man), under the scanning electron microscope (Decapoda, Natantia, Pontoniinae)”, in Crustaceana, volume 29, number 3, →DOI, pages 252–254:

     The tip of the dactylus is short and hooked, with a scoop-shaped depression on the anterior surface.

   • 2001 April, Charles Oliver Coleman, Ines Jäger, “Acanthonotozomella rauscherti (Amphipoda, Acanthonotozomellidae), a new species from the Antarctic Ocean”, in Journal of Crustacean Biology, volume 21, number 2, →DOI, pages 475–483:

     Pereiopod 1 […] dactylus with 3 pointed processes on posterior margin (Fig. 2g).