FOSSILIA - Reports in Palaeontology

Lower Miocene (Burdigalian) acorn barnacles (Cirripedia: Sessilia) from the Chilcatay Formation of southern Peru: palaeoenvironmental, palaeobiogeographical and evolutionary significance

 

Alberto Collareta 1, Giovanni Coletti 2, Giulia Bosio 1,2 & John S. Buckeridge 3

¹ Dipartimento di Scienze della Terra, Università di Pisa, via Santa Maria 53, 56126 Pisa (Italy); alberto.collareta@unipi.it;  https://orcid.org/0000-0002-6513-8882

² Dipartimento di Scienze dell’Ambiente e della Terra, Università degli Studi di Milano Bicocca, 20126 Milano (Italy);
giovanni.p.m.coletti@gmail.com; 

giulia.bosio.giulia@gmail.com; G. Bosio: https://orcid.org/0000-0001-8067-4926
³ Earth & Oceanic Systems Group, RMIT, Melbourne 3001, Australia; john.buckeridge@rmit.edu.au 

 

How to cite: Collareta et al. (2020). Lower Miocene (Burdigalian) acorn barnacles (Cirripedia: Sessilia) from the Chilcatay Formation of southern Peru: palaeoenvironmental, palaeobiogeographical and evolutionary significance. Fossilia, Volume 2020: 12-14. https://doi.org/10.32774/FosRepPal.2020.0604

Bullet-Points Abstract
  • We report on a recently described barnacle-rich facies from the East Pisco Basin.
  • Barnacles are associated with an abundant, mollusc-rich hard-substrate biota (i.e., a barnamol).
  • The Chilcatay barnacle facies depicts a very shallow, high-energy, nearshore assemblage.
  • Two new species of austromegabalanines have been described from this Burdigalian assemblage.
  • Austromegabalanines likely originated at low latitudes and in warm marginal-marine waters.

Keywords: Austromegabalanini; Austromegabalanus carrioli; barnamol; Perumegabalanus calziai; East Pisco Basin.

 
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Fig. 1. Austromegabalanine barnacles from the barnacle facies of Ullujaya (Peru). A. Austromegabalanus carrioli, complete shell. B. Austromegabalanus carrioli, interlaminate figures. C. Austromegabalanus carrioli, detail of an interlaminate figure. D. Perumegabalanus calziai, complete shell. E. Perumegabalanus calziai, interlaminate figures. F. Perumegabalanus calziai, detail of an interlaminate figure. Modified after Coletti et al. (2018).

Cited References

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