Dalytyphloplanida is a suborder of rhabdocoel flatworms. It contains about 1000 species and has a cosmopolitan distribution in both marine and freshwater environments, with several groups having commensal or parasitic lifestyles.
Description
The suborder Dalytyphloplanida was recently erected based on molecular evidences and few synapomorphies are known. The possible identified synapomorphies include the presence of small dense granules, as well as an axonemal spur and a group of longitudinal microtubules in sperm cells. == Classification ==
Classification
Traditionally, members of the suborder Dalytyphloplanida were classified into two groups: Dalyellioida and Typhloplanoida, although both were poorly characterized morphologically. However, synapomorphies for these newly erected clades are not yet known. == References ==