Alternative combinations: Echinanthus mortonis, Pygorhynchus mortonis
Synonyms: Cassidulus subconicus Clark 1891, Cassidulus subquadratus Conrad 1860, Gonioclypeus subangulatus Emmons 1858
Belongs to Hardouinia according to C. W. Cooke 1953
See also Clark and Twitchell 1915 and Kier 1962
Sister taxa: Hardouinia aequorea, Hardouinia bassleri, Hardouinia conoideus, Hardouinia florealis, Hardouinia kellumi, Hardouinia mcglameryae, Hardouinia micrococcus, Hardouinia stantoni, Hardouinia taylori, Clarkiella hemispherica
Subtaxa: Hardouinia mortonis emmonsi
Distribution:
• Cretaceous of North Atlantic (1 collection), United States (24: Alabama, Georgia, Mississippi, North Carolina, South Carolina, Texas)
Total: 25 collections each including a single occurrence
Specimen images are retrieved through the ePANDDA API.
Click image to enlarge. Click to access iDigBio record.