Number of cranial and mandibular samples for which morphological data were collected from public and private institutions/collections.

‘NSMNH’, ‘NBM’, and ‘CMN’ denote Nova Scotia Museum of Natural History, New Brunswick Museum, and Canadian Museum of Nature, respectively.

‘NSMNH’、‘NBM’与‘CMN’分别指代新斯科舍自然历史博物馆（Nova Scotia Museum of Natural History）、新不伦瑞克博物馆（New Brunswick Museum）以及加拿大自然博物馆（Canadian Museum of Nature）。