original description(ofGuembelina washitensis Tappan, 1940 †)Tappan, H. (1940). Foraminifera from the Grayson Formation of northern Texas. <em>Journal of Paleontology.</em> 14: 93-126.[details] Available for editors [request]
new combination referenceGeorgescu, M. D.; Huber, B. T. (2009). Early evolution of the cretaceous serial planktic foraminifera (late Albian-Cenomanian). <em>The Journal of Foraminiferal Research.</em> 39(4): 335-360., available online athttps://doi.org/10.2113/gsjfr.39.4.335[details] Available for editors [request]