Grammatodon hexacostata Bird, 1968
Original source
Bird (1968): 139, pl. 13 figs 1–2.
Type stratum and age
“Bed ten of Gaptank Formation”; Upper Pennsylvanian, Carboniferous according to Wardlaw & Nestell (2019).
Type locality
“[USNM] locality 700a – same as locality 700 [2 miles S. 17° E. of Gaptank, 1 1/ 4 miles E. of a point on the Fort Stockton road 2 miles S. of Gaptank, about 23 1/ 2 miles NE of Marathon, Texas] but 1/ 4 mile E. in a small canyon ”, United States of America.
Type material
Holotype is a RV (USNM PAL 155835; pl. 13 fig. 1a–b). Paratype is a RV (USNM PAL 155836; pl. 13 fig. 2a–b). All stored at the Smithsonian National Museum of Natural History, Paleobiology Collection, Washington, D.C.
Remarks
Bird (1968) consistently used a feminine ending for all species of Grammatodon, but the gender of the genus is masculine; the correct spelling is hexacostatus.
Publication Date: 2026-06-04