Hardouinia (Hardouinia) mortonis (Michelin, 1850)

Remarks

• Collection:   Mississippi Museum of Natural Science.  Photos by Curator George Phillips.  Thanks!

• The smaller one is from the Peedee Fm, New Hanover Co., NC.  The larger one is from the Ripley Fm, Chiwapa Mbr, Chickasaw Co., MS.

General Info

Synonyms (older names and misidentifications in the literature)

• 1850 Pygorhynchus mortonis Michelin
• 1853 Hardouinia mortoni (Michelin); Haime
• 1858 Echinanthus mortonis (Michelin); Desor
• 1860 Cassidulus subquadratus Conrad
• 1893 Cassidulus subconicus Clark
• 1915 Cassidulus subquadratus Conrad; Clark
• 1915 Cassidulus subconicus Clark; Clark and Twitchell
• 1915 Cassidulus berryi Twitchell; Clark and Twitchell
• 1927 Cassidulus emmonsi Stephenson
• 1936 Hardouinia? stetsoni Stephenson
• 1952 Petalobrissus simpatiae Sanchez; Roig
• 1959 Hardouinia mortonis (Michelin)
• 1959 Hardouinia mortonis emmonsi (Stephenson); Cooke
• 1987 Hardouinia mortonis emmonsi (Stephenson); Akers and Akers
• 2000 Hardouinia (Hardouinia) mortonis (Michelin); Smith and Jeffery

Stratigraphic Occurrence

• Navarro Group, Escondido Formation of south-central Texas
• Matawan Group, Wenonah Formation of New Jersey and Delaware
• Scotts Hill Member, Peedee Formation of North Carolina
• Ripley Formation, Chiwapa Member of Mississippi
• Ripley Formation of Alabama
• Late Maastrichtian Rocks of Cuba

Age

• Hardouinia (Hardouinia) mortonis (Michelin) ranges from about the late (possibly latest) Campanian time to late Maastrichtian time (~73–66 mya).

Geographic Occurrence (by no means an all-inclusive list)

• Alabama (county ?)
• Bexar County, TX
• Chickasaw County, MS
• Cuba
• Newcastle County, DE
• New Hanover County, NC

Remarks

         For identification and descriptions, see:

• Carter, J. G.; Gallagher, P. E.; Valone, R. E.; Rossbach, T. J.; Gensel, P. G.; Wheeler, W. H.; Whitman, D.  1988.  Fossil Collecting in North Carolina.  North Carolina Geological Survey Bulletin 89.
• Smith, A. B.; Jeffery, C. H.  2000.  Maastrichtian and Palaeocene Echinoids:  A Key to World Faunas.  The Palaeontological Association Special Papers in Palaeontology 63.