Assumptions and Protocol of the Taxonomic Identification of Faunal Remains in Zooarchaeology: a North American Perspective

Abstract

Identification of the species of animal represented by ancient bones, teeth, and shells based on the size and shape of those materials is one of the most fundamental and foundational steps in paleozoology, yet only scattered comments in the literature regarding this matter have been published. The history of taxonomic identification of faunal remains began with researchers learning which anatomical traits were taxonomically diagnostic; this required the creation of reference collections of skeletons of known taxonomy. To identify the taxon of animal represented by an ancient bone or tooth or shell requires comparison between the taxonomically unknown and reference materials of known taxonomy. The key assumption underpinning taxonomic identification is that anatomical similarity in size and shape of a reference bone and a paleozoological bone signifies genetic similarity and, thus, taxonomic similarity. Reference collections must be large both in terms of the number of species represented and the number of skeletons per species. Anatomical traits are morphological (qualitative), metric (quantitative), and meristic (frequency). Reporting of the identification protocol followed, including the reference skeletons, illustrated guides, and anatomical traits used, is strongly recommended so that what are believed to be taxonomically diagnostic traits can be tested and either used, revised, or discarded by others. An online database listing what are believed to be taxonomically diagnostic traits will increase efficiency, enhance accuracy of identifications, and should prompt re-identification of collections studied in the past.