Kellogg 1936, however, realized that Andrews' specimen was a juvenile, and, he assumed, the same species as Zeuglodon isis, described by Andrews 1906.
Kellogg 1936 je, međutim, shvatio da je Andrewsov primjerak bio mladunac i pretpostavio je da je pripadao istoj vrsti kao i Zeuglodon isis, koju je Andrews opisao 1906. godine.