TABLE 4. Completeness (Cp.) and articulation (Art.) scores for I. duncani specimens from Isisford (following Beardmore et al. (2012); Syme and Salisbury (2014)).

Completeness (Cp.) and articulation (Art.) scores for I. duncani specimens from Isisford. As per Beardmore et al. [40], Xp denotes skeletal units that are not visible due to truncation with the edge of the block or blocks missing, and Xh denotes skeletal obscured by matrix or overlying skeletal elements. Beardmore et al. [40] propose that specimens with 3 instances of either Xp or Xh in the dataset should be omitted from further analysis: in this instance, all specimens except the holotype QM F36211 were excluded from further analyses (denoted by ‘--’). The average completeness and articulation for QM F36211 was calculated both with and without the dermal skeletal units: with the dermal skeletal units, compared to a maximum total score of 36 (4 for each of the 9 of 11 units omitting Xp/Xh data); without the dermal skeletal units, compared to a maximum total score of 28 (4 for each of the 7 of 9 units omitting Xp/Xh data). The data was then compared with the trend lines proposed by Beardmore et al. [40] where possible.