''Rhabdinopora'' is a genus of

graptolite Graptolites are a group of colonial animals, members of the subclass Graptolithina within the class Pterobranchia. These filter-feeding Filter feeders are a sub-group of suspension feeding animals that feed by straining suspended matter and ...

s belonging to the family

Anisograptidae Anisograptidae is an extinct family of graptolites. As the first planktic graptolites, they play a crucial role for understanding the transition of graptolites from ocean floor suspension feeders to ocean surface plankton during the early Ordovi ...

. It is the earliest

planktic Plankton are the diverse collection of organisms found in water (or air) that are unable to propel themselves against a current (or wind). The individual organisms constituting plankton are called plankters. In the ocean, they provide a cruc ...

graptolite and is presumably the ancestor of all later planktic graptoloids. Some species identified as the first planktid graptolite are: *''

Rhabdinopora proparabola ''Rhabdinopora'' is a genus of graptolites belonging to the family Anisograptidae. It is the earliest planktic graptolite and is presumably the ancestor of all later planktic graptoloids. Some species identified as the first planktid graptolite ...

'' *''

Rhabdinopora praeparabola ''Rhabdinopora'' is a genus of graptolites belonging to the family Anisograptidae. It is the earliest planktic Plankton are the diverse collection of organisms found in water (or air) that are unable to propel themselves against a curre ...

'' *'' Rhabdinopora parabola'' *'' Rhabdinopora flabelliformis''

References

Graptolite genera Ordovician animals of Asia Paleozoic life of Newfoundland and Labrador {{Paleo-deuterostome-stub