Maximum likelihood reconstruction of the suborder Calcaxonia (rooted to five sea pens; Order Pennatulacea) based on the 5′ end of <i>mtMutS</i> (102 taxa, 272 colonies, 829 bp; TVM+G model; 1000 bootstrap replicates).

<p>All five families of the Calcaxonia are represented. Node support values from the ML analysis (bold, only values >70% shown) are indicated under each node, and node support values from the Bayesian analysis (>0.90) are above each node. Chrysogorgiidae taxa are either color coded (MCC) or have bolded branches (nonMCC). The collection depth of the shallowest <i>Chrysogorgia</i> specimens (≤200 m) for which a DNA sequence could be produced is indicated next to the tip label (bolded).