Figure 2
Phylogenetic analysis of 241 COI sequences of Stylophora pistillata.
(A) Bootstrap values are based on Baysian/ML/NJ analyses. The numbers in the brackets stand for the total number of samples obtained form each location. Morphotypes and corallite structure of the four clades of Stylophora. (B) Based on SEM photos, in clade 1, six regular primary septa that are confluent to the center, fusing with the columella and corallites, are separated by the cœnosteum covered with sharp, fine and thin spinules. In clade 2, the arrangement of primary septa is similar to clade 1, but the spinules in the cœnosteum are more rounded and fused corallites appear immersed in the cœnosteum. In clade 3, there are six poorly-developed primary septa with a rudimental second cycle of septa visible in some corallites. Septa remain separated and not confluent with the center. A columella is absent and the corallites are separated by poorly developed walls that raise to the surface of the cœnosteum. Spinules are rounded and poorly developed. Finally, in clade 4, there is one cycle of six poorly-developed septa that is continuous with the hoods in the cœnosteum; the columella is well developed but is not fused with septa. Hoods are rounded and regularly distributed. Seriatopora morphotype and corallite structure is shown between clade 2 and clade 3.
