Abathomphalus
Encyclopedia
Abathomphalus was a genus
Genus
In biology, a genus is a low-level taxonomic rank used in the biological classification of living and fossil organisms, which is an example of definition by genus and differentia...

 of rhizaria
Rhizaria
The Rhizaria are a species-rich supergroup of unicellular eukaryotes. This supergroup was proposed by Cavalier-Smith in 2002. They vary considerably in form, but for the most part they are amoeboids with filose, reticulose, or microtubule-supported pseudopods...

 of the Abathomphalinae family. It was described and recorded in 1957 by Bolli, Loeblich, and Tappan. It was defined as being different from other, related genera because of the "extra-umbilical position of the primary aperture and in the radial sutures on the umbilical side."
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