Caudal vertebra 1 of Medialuna ancietae (external view)
Maximum known length for this species 
Specimen collection Study collection of P. Béarez (Paris, France), specimen n°MNHN-5080
Specimen determination Béarez, P. (1998)
Specimen length 27.3 cm SL, 34.8 cm TL
Collection site of the specimen Boca del Rio (Peru)
Image scale 1 cm
Image source Grosjean, S.
Image acquisition scanner
 Epson Perfection 3200 Photo