original description
Meek, F.B. (1870). Descriptions of fossils collected by the U. S. Geological Survey under the charge of Clerence King, Esq. <em>Proceedings of the Academy of Natural Sciences of Philadelphia</em>. 22: 56-64, available online at https://www.biodiversitylibrary.org/page/26300427
page(s): 58 [details]
From editor or global species database
Synonymy Wenz (1929) listed it in synonymy of G. sculptilis, which is preoccupied by G. sculptilis Lea, 1853 (see also Henderson, 1935). Systematic position uncertain. [details]