cyrtopia stage
Fifth larval stage in euphausiaceans in which antennae no longer serve for locomotion [Moore and McCormick, 1969].
(Order Euphausiacea):
Formerly considered 5th larval stage with antennae no longer used in locomotion; currently included in furcilia stage [McLaughlin, 1980].

Crustacea glossary. . 2011.

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  • cyrtopia — n. [Gr. kyrtos, curved; ops, eye] (ARTHROPODA: Crustacea) In Euphausiacea, the fifth larval stage in which the antenna becomes modified and ceases to serve in locomotion and posterior legs and gills appear …   Dictionary of invertebrate zoology

  • nauplius — Characteristic crustacean larval stage bearing median simple (naupliar) eye and 3 pairs of setose, functional appendages destined to become the antennules, antennae and mandibles [Brusca and Brusca, 2002]. Early larval stage having only… …   Crustacea glossary

  • metanauplius — A stage of development between the nauplius and calyptopis in euphausiids. A vestigial abdomen is present [Mauchline, 1984]. Developmental stage following the nauplius larval stage and bearing the same three appendages but having additional body… …   Crustacea glossary

  • calyptopis — First larval stage following the nauplius stage in euphausids, corresponding roughly to the the protozoea stage [Brusca and Brusca, 2002]. Larval stage of euphausiids. There are three successive calyptopes, distinguished by the increasing degree… …   Crustacea glossary

  • furcilia — Fourth larval stage in euphausiaceans, marked by movable compound eyes that project beyond edge of carapace [Moore and McCormick, 1969]. Larval stage of euphausiids that has stalked eyes and resembles the adult in general body form [Mauchline,… …   Crustacea glossary

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