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. 2011 Jun 29;6(6):e21376. doi: 10.1371/journal.pone.0021376

Figure 1. Comparison of the LH PV18 fish centrum (D) to an ellimmichthyiform centrum (A–C) (Horseshoeichthyes) from the Dinosaur Park Formation (Campanian) of Alberta.

Figure 1

The notochordal foramen (NF) in the LH PV18 fish centrum (D) is so small that it cannot be seen from the angle of the photograph. The exact number and positions of mid-dorsal fossae (MDF) and laterodorsal fossae (LDF) are variable within the same taxon [23]. Photos (A–C) have been rotated to align with the general orientation of the obliquely figured LH PV18 fish centrum. Picture (A) was also flipped horizontally to simulate the right lateral view. Additional abbreviations: NA: neural arch articular pit. (A–C) adapted from Newbrey et al. ([22], Figure 9h). (D) adapted from Sereno et al. ([14], Figure S8B).