Poissonjakaumia
Poissonjakaumia is a genus of extinct bryozoans known from fossil records dating to the late Paleozoic, with primary occurrences in Mississippian to Permian-aged sediments. The genus forms delicate, encrusting to fan-shaped colonies that can reach several centimeters in height. Individual units, called zooecia, are small and hexagonal, reflecting a regular bryozoan calcified skeleton. The colonies typically exhibit a branching pattern, with growth fronts showing orderly arrangements of the individual zooids.
Etymology: The name Poissonjakaumia combines the surnames of two researchers honored for their contributions to the
Taxonomy: Poissonjakaumia is placed in the phylum Bryozoa, class Gymnolaemata, order Cheilostomatida, and family Poissonjakaumiidae (a
Discovery and history: The genus was established on the basis of well-preserved fossil material described in
Distribution and habitat: Fossils have been recovered from marine sedimentary formations in Europe and North America,
Significance: The genus contributes to understanding bryozoan diversity in the late Paleozoic and provides insights into