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A. Milne Edwards, 1879

Zoea [Platyxanthus crenulatus 1]
¥ Number of stages in the zoeal phase: 4.
¥ Morphological characters of first zoea [Table 11 First zoeae of Xanthidae]:
Carapace without medio-dorsal knob.
Carapace with lateral spines.
Abdominal somites without a sharp postero-lateral process.
Antenna type D (type D).
Maxillule endopod setation: 1, 6.
Maxillule scaphognatite with 4 plumose seate.
Maxillliped 1 basis and endopod setation: 8; 3, 2, 2, 1, 4.
Maxillliped 2 basis and endopod setation: 4; 1, 1, 5.
Furcae of telson with smooth surface.
Telson furcae with 1 dorsal, no outer and no inner spines.

Megalopa [Platyxanthus crenulatus]
¥ Number of stages in the megalopal phase: 1.
¥ Morphological characters of megalopa [Table 18 Mgp Xanthidae]:
Rostrum short, bifid.
Carapace smooth.
Maxillule (mx1) endopod setation: 4.
Maxilla (mx2) endopod setation: 9.
First maxilliped (mxp1) epipod setation: 10.
Third maxilliped (mxp3) epipod setation: 20.

Larval stages described by Menú-Marque, 1970; Boschi, 1981.

Geographical distribution of adult
Occidental Atlantic: Brazil (Santa Catarina to Rio Grande do Sul), Uruguay, Argentina (including Patagonia).

Depth range of adult
Sublittoral zone.

Platyxanthus crenulatus