Class Graptolithina Bronn 1849 (graptolite)
PaleoDB taxon number: 319610
Parent taxon: Pterobranchia according to C. E. Mitchell et al. 2013
Sister taxon: Cephalodiscida
Subtaxa: Acanthastus, Archaeodictyota, Ascograptus, Cactograptus, Camaroidea, Ceramograptus, Chaunograptus, Coelograptus, Crinocaulis, Crustoidea, Cyclograptidae, Dendroidea, Diplograptoidea, Dithecodendrum, Dithecoidea, Graptoblastoides, Graptoblastus, Graptolithus, Graptoloida, Haplograptus, Leveillites, Marsipograptus, Palmatophycus, Pilograptus, Pseudophyllograptus, Rhabdopleurida, Rhapdopleura, Siberiodendrum, Siberiograptus, Siryngotaenia, Stolonoidea, Trigonograptus, Tuboidea
Ecology: passively mobile planktonic suspension feeder