MolluscaBase taxon details
original description
Williams, H. S.; Breger, C. L. (1916). The fauna of the Chapman sandstone of Maine, including descriptions of some related species from the Moose River sandstone. <em>United States Geological Survey Professional Paper.</em> 89: 1-347., available online at https://doi.org/10.3133/pp89 page(s): 173; note: introduced as subgenus of Nucula, but treated as full genus throughout the text [details] 
basis of record
Moore, R. C. (editor). (1969). Treatise on Invertebrate Paleontology. Part N. Mollusca 6. Bivalvia. Geological Society of America and University of Kansas Press. Vol. 1: i-xxxviii, N1-N489. Vol. 2: i-ii, N491-N952. [details]
additional source
Klug, C.; Kröger, B.; Rücklin, M.; Korn, D.; Schemm-Gregory, M.; De Baets, K.; Mapes, R. H. (2008). Ecological change during the early Emsian (Devonian in the Tafilalt (Morocco), the origin of the Ammonoidea, and the first African pyrgocystid edrioasteroids, machaerids and phyllocarids. <em>Palaeontographica, Abt. A.</em> 283(4-6): 83-176. page(s): 109 [details] Available for editors [request]
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