Pterobranchia - Cyclograptidae
Parent taxon: Graptolithina according to J. Maletz 2014
Sister taxa: Acanthastida, Ascograptus, Camaroidea, Ceramograptus, Crinocaulis, Crustoidea, Dendroidea, Diplograptoidea, Dithecodendridae, Dithecodendrum, Dithecoidea, Graptoblasti, Graptolithus, Graptoloida, Graptoloidea, Graptovermida, Leveillites, Limpidograptus, Palmatophycus, Pilograptus, Rhabdopleuridae, Siryngotaenia, Stolonoidea, Thamnograptus, Trigonograptus, Tuboidea, Wimanicrustidae
Subtaxa: Calycotubus Camarotubus Conitubus Cyclograptus Discograptus Galeograptus Kozlowskitubus Marsipograptus Parvitubus Reticulograptus Rhipidodendrum Tubidendrum
Ecology: passively mobile planktonic suspension feeder
Distribution:
• Devonian of the Czech Republic (1 collection)
• Silurian of Canada (1: Ontario), China (1), the Czech Republic (3), United States (8: Illinois, New York)
• Ordovician of Canada (1: Quebec), China (1), Spain (3)
Total: 19 collections each including a single occurrence