A. Milne Edwards, 1879
Zoea [no illustration available]
¥ Number of stages in the zoeal phase: 4.
¥ Morphological characters of first zoea [Table 11 First zoeae of Xanthidae]:
Carapace with medio-dorsal knob.
Carapace with lateral spines.
Abdominal somites 3-5 with 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: 10; 3, 2, 1, 2, 5.
Maxillliped 2 basis and endopod setation: 4; 1, 1, 6.
Furcae of telson with smooth surface.
Telson furcae with 1 dorsal, 2 outer and no inner spines.
Megalopa [Platyxanthus patagonicus]
¥ Number of stages in the megalopal phase: 1.
¥ Morphological characters of megalopa [Table 18 Mgp Xanthidae]:
Rostrum short, deflected ventrally.
Carapace smooth.
Maxillule (mx1) endopod setation: 4.
Maxilla (mx2) endopod setation: 6.
First maxilliped (mxp1) epipod setation: 7.
Third maxilliped (mxp3) epipod setation: 20.
Larval stages described by Iorio and Boschi, 1986.
Geographical distribution of adult
Occidental Atlantic: Brazil (Rio Grande do Sul), Uruguay and Argentina (including Patagonia).
Depth range of adult
> 60 m.