Palaxius Brönnimann and Norton, 1960

Kietzmann, Diego A., Blau, Joachim, Fernández, Diana E. & Palma, Ricardo M., 2010, Crustacean microcoprolites from the Upper Jurassic- Lower Cretaceous of the Neuquén Basin, Argentina: Systematics and biostratigraphic implications, Acta Palaeontologica Polonica 55 (2), pp. 277-284 : 279

Ichnogenus Palaxius Brönnimann and Norton, 1960

Type ichnospecies: Palaxius habanensis Brönnimann and Norton, 1960 , La Habana, Cuba, Miocene .

Diagnosis.—The ichnogenus Palaxius is characterised by the presence of longitudinal canals with crescent or hookshaped outline, arranged bilaterally to a symmetry plane ( Brönnimann 1972).

Remarks.—The ichnogenus Palaxius contains 27 known ichnospecies from the Late Carboniferous to the Miocene, including the 2 new ichnospecies described in this paper (cf. Senowbari−Daryan and Kube 2003; Senowbari−Daryan et al. 2007; Buchs et al. 2009). Palaxius biserialis (Kristan−Tollmann, 1989) has been reported for the Tithonian and P. decaochetarius Palik, 1965 , and P. tetraochetarius Palik, 1965 from the Berriasian–Valanginian interval.