Saccoglossus Schimkewitsch 1892 (acorn worm)
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Parent taxon: Harrimaniidae according to C. B. Cameron 2016
See also Bulman 1970
Sister taxon: Megaderaion
Subtaxa: Saccoglossus testa
Distribution: found only at Mazon Creek (FMNH collection) (Carboniferous of Illinois)
Specimen images are retrieved through the ePANDDA API.
Click image to enlarge. Click to access iDigBio record.