|Basic info||Taxonomic history||Classification||Relationships|
|Morphology||Ecology and taphonomy||Age range and collections|
Hydrozoa - Hydroida
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.
|P. D. Taylor 1988||Colony with unbranched upright stems arising from a stolonal hydrorhiza. Hydrothecae borne on both stolons and erect stems. Stolons branching, anastomosing, and bearing hydrothecae alternately on either side. Stolonal hydrothecae have an adnate tubular proximal part and an erect, tubular to slightly barrel-shaped distal part. Stems are relatively straight, and bear hydrothecae alternately on either side.|