|Basic info||Taxonomic history||Classification||Relationships|
|Morphology||Ecology and taphonomy||External Literature Search||Age range and collections|
Tommotiida - Tannuolinidae
If no rank is listed, the taxon is considered an unranked clade in modern classifications. Ranks may be repeated or presented in the wrong order because authors working on different parts of the classification may disagree about how to rank taxa.
|G. Li and S. Xiao 2004||Micrina can be distinguished from Tannuolina by its bilaterally symmetrical mitral sclerites that bear two teeth, the absence of pores on the apical area of mitral sclerites, and the absence of a well-developed sella in sellate sclerites.|