Replication error in morphometric data
Shell lengths of a random selection of snails (n = 65) were measured in triplicate. Average distance from the mean of these three measurements was 0.03 mm for shell length. Error in landmark data was assessed based on 53 out of the 65 specimens (47 specimens of C. galea, six specimens of C. caribaea). Replication errors were slightly higher for C. galea than for C. caribaea. Error in digitizing landmarks was 3.6% in C. galea compared to 1.7% in C. caribaea. The total error, which included inconsistencies in parallax as well, was 11.4% in C. galea and 4.0% in C. caribaea. Replication error in C. curacaoensis sp. nov. was not calculated.