Pteropods are a widespread group of holoplanktonic gastropod molluscs and are uniquely suitable for study of long-term evolutionary processes in the open ocean because they are the only living metazoa
TABLE 1. Overview of the evolutionary models for the nuclear and mitochondrial gene partitions used in this study (pos = triplet position). Modelnuclear partitionsmitochondrial partitionsF81ACM4_pos2,
