Coenholectypus castilloi (Cotteau, 1890)

Remarks

• Collector:    Lee Duchouquette

• Formation:  Upper Washita Group, Mainstreet Limestone

• Location:     Tarrant County, TX.

• Dimensions:  diam = 28 mm, ht = 10 mm

General Info

Synonyms (older names and misidentifications in the literature)

• 1890 Holectypus castilloi Cotteau

• 1893 Holectypus charltoni Cragin

• 1915 Holectypus planatus Roemer; Clark (in part)

• 1920 Holectypus limitis Böse; Adkins & Winton

• 1925 Holectypus limitis Böse; Winton

• 1928 Holectypus castilloi Cotteau; Adkins

• 1928 Holectypus charltoni Adkins

• 1928 Holectypus limitis Böse; Adkins

• 1946 Holectypus (Coenholectypus) castilloi Cotteau; Cooke

• 1987 Coenholectypus castilloi (Cotteau); Akers & Akers

Stratigraphic Occurrence

• Latest Albian-earliest Cenomanian rocks of Jalisco, Mexico

• Washita Group, Georgetown Formation of central and south-central Texas

• Washita Group, Mainstreet Formation of north Texas

• Washita Group, Weno Formation of north Texas

Age

• Coenholectypus castilloi (Cotteau) ranges from about the Mortoniceras (Angolaites) drakei (Young) zone to the Mariella (Wintonia) brazoensis (Roemer) zone, very late Albian to earliest Cenomanian Stage (~98–96 mya).

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

• Denton County, TX

• Hays County, TX

• Jalisco, Mexico

• Tarrant County, TX

• Val Verde County, TX

Remarks

         For identification and descriptions, see:

• Cooke, C. W.  1946.  Comanche Echinoids.  Journal of Paleontology 20 (3), 281 and plate 32, fig 15.

• Cotteau, G.  1890.  Note sur Quelques Échinides du Terrain Crétacé du Mexique.  Bulletin de la Société Géologique de France, 3me Serie, tome 18, 292–299, plates 1 & 2.