†Tylonautilus gratiosus Girty 1909 (nautiloid)
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Cephalopoda - Nautilida - Tainoceratidae
Alternative combination: Coelonautilus gratiosus
Belongs to Tylonautilus according to S. Niko and R. H. Mapes 2017
See also Gordon 1964 and Niko and Mapes 2016
Sister taxa: Tylonautilus mergus, Tylonautilus permicus, Tylonautilus qinglongensis
Ecology: nektobenthic carnivore
Average measurements (in mm): shell diameter 59.0
Distribution:
• Carboniferous of United States (11: Arkansas collections)
Total: 11 collections each including a single occurrence
Specimen images are retrieved through the ePANDDA API.
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