Comparison of bone-cell lacuna characteristics in different samples.

Table summarizing the parameters of bone histology that allow a periosteally mediated fibrous enthesis (PMFE) to be distinguished from an unmediated fibrous enthesis (UMFE) in the humerus of Desmognathus. Based on statistically significant results (Text S1), the muscle insertion in the humerus of Eusthenopteron can be interpreted as a PMFE and the muscle insertions in the interolateral plate of Compagopiscis can be interpreted as UMFE. The *indicates an unexplained increase of the volume of bone-cell lacunae in region 2 in Eusthenopteron insertion.