Macraster washitae Lambert, 1920

Remarks

• Collectors:    Ed and Cathy Swiatovy

• Formation:   Washita Group, Duck Creek Formation

• Location:      Grayson County, TX

General Info

Synonyms (older names and misidentifications in the literature)

• 1915 Hemiaster whitei (Clark)
• 1920 Macraster washitae Lambert
• 1926 ?Palhemiaster ex. cf. comanchei (Clark); Scott
• 1927 Macraster washitae Lambert
• 1928 Macraster washitae Lambert; Adkins
• 1936 Pliotoxaster inflatus Smiser
• 1936 Pliotoxaster whitei (White); Smiser
• 1936 Macraster aguilerae Böse; Smiser
• 1936 Macraster washitae Lambert; Smiser
• 1936 Macraster denisonensis Smiser
• 1936 Macraster texanus Römer; Smiser
• 1946 Hemiaster elegans washitae (Lambert); Cooke
• 1987 Macraster elegans washitae (Lambert); Akers & Akers
• 1989 Macraster washitae Lambert; Finsley

Stratigraphic Occurrence

• Lower Washita Group, Upper Marl Member, Duck Creek Formation of North–Central Texas
• Lower Washita Group, Boracho Formation, Levinson Member of Trans-Pecos Texas

Age

• Macraster elegans washitae (Lambert) ranges within the Mortoniceras equidistans (Cragin) Zone in North Texas, lower Upper Albian Stage (~101 mya).

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

• Grayson County, TX
• Pecos County, TX
• Tarrant County, TX

Remarks

         For identification and descriptions, see:

• Cooke, C. W.  1946.  Comanche Echinoids.  Journal of Paleontology 20 (3), 229–230, plate 33, figs 1–4.