†subfamily Tetragrapti Bulman 1970 (graptolite)
Pterobranchia - Graptoloidea - Dichograptidae
Technically ranked as a "section" grade, but ranking as subfamily because below family rank.
Full reference: O. M. B. Bulman. 1970. Graptolithina with sections on Enteropneusta and Pterobranchia (Second edition, revised and enlarged). Treatise on Invertebrate Paleontology V:V1-V163
Parent taxon: Dichograptidae according to O. M. B. Bulman 1970
Sister taxa: Clonograptus, Dichograpti, Dichograptinae, Dichograptus, Didymograpti, Didymograptus, Etagraptus, Goniograpti, Loganograptus, Orthodichograptus, Schizograpti, Temnograpti
Subtaxa: none
Ecology: passively mobile planktonic suspension feeder
Distribution: there are no occurrences of Tetragrapti in the database