Acanthograptidae is an extinct family of

graptolite Graptolites are a group of colonial animals, members of the subclass Graptolithina within the class Pterobranchia. These filter-feeding organisms are known chiefly from fossils found from the Middle Cambrian ( Miaolingian, Wuliuan) through t ...

Genera

List of genera from Maletz (2014):

References

Graptolites Prehistoric hemichordate families Taxa described in 1938 {{Hemichordate-stub