Suborder Thecaphora Fleming 1828
Synonym: Thecata Fleming 1828
Parent taxon: Hydroida according to J. Maletz 2014
See also Taylor 1988
Sister taxa: Archaeonectris, Calyptoblastina, Cambrohydra, Chondrophorina, Clyxhydra, Drevotella, Flexihydra, Gymnoblastina, Inocaulis, Lafoeidae, Mazohydra, Palaeacmea, Palaeonectris, Parleria, Pontifennia, Psammactinia, Rhabdohydra
Subtaxa: Archaeodendrum Chaunograptus Eisenackiella Plumalina Protohalecium
Ecology: stationary epifaunal carnivore-suspension feeder
Distribution:
• Cretaceous of the United Kingdom (1 collection)
• Devonian of United States (6: Missouri, New York)
• Ordovician of United States (1: Ohio)
• Cambrian of Canada (5: British Columbia)
Total: 13 collections each including a single occurrence