subchela
Claw where the dactyl and propodus of an appendage articulate at right angles to the long axis of the limb. Used incorrectly in euphausiids to describe grouping of setae that, with some imagination, form a claw [Mauchline, 1984].
Distal end of appendage developed as prehensile structure by folding back of dactyl against propodus or some broadened part of it; also may result from propodus folded back against carpus; e.g., gnathopod [McLaughlin, 1980].
Distal extremity of limb developed as prehensile structure by folding back of dactylus against propodus or broadened part of it (e.g., Stomatopoda); may compromise propodus folded back against carpus. (Syn. gnathopod) [Moore and McCormick, 1969].
Prehensile structure in family Crangonidae, where terminal segment (dactylus) folds back against the more robust penultimate segment (propodus) [Butler, T.H.].
(Order Tanaidacea):
Pincer-like structure at end of cheliped (first pereopod). Formed by terminal segment (dactylus) bearing down on next to last segment (propodus) [Stachowitsch, 1992].
(Order Decapoda):
Pincer-like structure formed by terminal segment of appendage (dactylus) bearing down on next to last segment (propodus). See: chela [Stachowitsch, 1992].
(Order Amphipoda):
Pincer-like structure of first two pereopod pairs (gnathopods). Formed by terminal segment (dactylus) bearing down on posterior margin (palm) of enlarged next to last segment (propodus); occasionally also formed by dactylus and propodus bearing down on carpus [Stachowitsch, 1992].
(Order Isopoda):
In modified anterior pereopod(s), pincer-like structure formed by dactylus bearing down on propodus or propodus down on carpus [Stachowitsch, 1992].
(Order Mysida):
Typically relatively small, pincer-like structure of thoracopod. Formed by terminal segment (dactylus) bearing down on propodus. Certain bottom-dwelling mysidaceans have powerful subchela on third thoracic endopod [Stachowitsch, 1992].
(Order Stomatopoda):
On thoracic appendages (thoracopods) 1-5, pincer-lie structure formed by dactyl folded back and bearing down on propodus. Subchela of second thoracopod particularly well developed as a raptorial claw. (Syn. subcheliped, subchelipede) [Stachowitsch, 1992].
(Subclass Copepoda):
The terminal, movable part of an appendage, which adducts to oppose the surface of the subterminal segment [Boxshall and Halsey, 2004].

Crustacea glossary. . 2011.

Look at other dictionaries:

  • subchela — n. [L. sub, under; Gr. chele, claw] (ARTHROPODA: Crustacea) The distal end of a limb developed as a prehensile structure by the folding back of a dactyl against the propodus or widest part of it; may arise from propodus folded back against the… …   Dictionary of invertebrate zoology

  • subchela — sub·chela …   English syllables

  • subchela — |səb+ noun (plural subchelae) Etymology: New Latin, from sub + chela : a grasping organ of the limbs of some crustaceans (as of the genus Squilla) in which the terminal segment folds back against the next one * * * subˈchela [f. sub 23 + …   Useful english dictionary

  • dactylus — ( ) [Holthuis, 1993]. Schematic drawing of a thoracic leg. [Holthuis, 1993] ( ) [Baba, 2005]. Entire animal, right appendages omitted, dorsal view, based on Munida. [Baba, 2005] ( ) [Baba, 2005]. Endopod of Mxp 3, lateral; and endopod of Mxp 3,… …   Crustacea glossary

  • propodus — ( ) [Holthuis, 1993]. Schematic drawing of a thoracic leg. [Holthuis, 1993] ( ) [Baba, 2005]. Entire animal, right appendages omitted, dorsal view, based on Munida. [Baba, 2005] ( ) [Baba, 2005]. Endopod of Mxp 3, lateral; and endopod of Mxp 3,… …   Crustacea glossary

  • chela — A claw formed by the dactyl and propodus or a limb. Incorrectly used in euphausiids to describe setae in the configuration of a claw [Mauchline, 1984]. A claw, or the claw like terminus of a cheliped [Bliss, 1982]. A forceps like structure… …   Crustacea glossary

  • subchelate — An appendage in which the dactylus is shorter and less robust than the propodus or vice versa [Ingle, 1980]. Claw like, formed of transverse end of propodus and opposing dactylus (cf. chelate) [Poore, 2004]. Having the ability to grasp by folding …   Crustacea glossary

  • gnathopods — Chelate or subtotal, prehensile maxilliped (e.g., Amphipoda); also used for first two prehensile pereiopods of amphipods whether chelate or subchelate [Moore and McCormick, 1969]. Prehensile maxilliped; also 1st 2 prehensile pereopods of… …   Crustacea glossary

  • subchelate — “+ adjective Etymology: sub + chelate 1. : imperfectly chelate 2. [New Latin subchela + English ate] : ending in a subchela …   Useful english dictionary

  • Palinurus elephas — Scientific classification Kingdom: Animalia Phylum …   Wikipedia

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