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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 segments. [Brusca and Brusca, 2002]
Postnaupliar larva with generally same body and body shape as nauplius, but with additional appenages. [McLaughlin, 1980]
Postnaupliar larva with same general body and limb morphology as nauplius, but having additional limbs. [Moore and McCormick, 1969]
(Taxon-specific: ) Larval stage at which certain predatory water fleas hatch; otherwise, metanuaplius is typically passed while still within egg. [Stachowitsch, 1992]
Later larval stage between nauplius and adult. Earlier metanauplii bear only first three pairs of appendages (as in nauplii), yet exhibit further segmentation of trunk. Most tadpole shrimp hatch as metanauplii. [Stachowitsch, 1992]
Late larval stage; carapace typically first produced by metanauplius. (see also nauplius). [Stachowitsch, 1992]
(Taxon-specific: Family Pycnogonidae) Later larval stage between nauplius and adult. Characterized by gradual increase in number of segments and appendages. [Stachowitsch, 1992]
Larval stage at which cephalocarids hatch. Includes a number of substages characterized by a gradual increase in number of segments and appendages. [Stachowitsch, 1992]
Second of basically five larval stages (nauplius, metanauplius, protozoea, zoea, postlarva). Resembles nauplius, but bears additional appendages. Typically still contained within egg; if free-swimming, with antennal locomotion. [Stachowitsch, 1992]
One of several substages in in development between nauplius and adult. Characterized by gradual increase in number of segments and appendages. [Stachowitsch, 1992]
Nauplius. [Stachowitsch, 1992]
Second of several larval stages (nauplius, metanauplius, calyptopis, furcilia). Characterized by development of labrum and rudiments of maxillules, maxillae, and first thoracopods.
See: Cyrtopia [Stachowitsch, 1992]