Erythrism in the Maritime Garter Snake, Thamnophis sirtalis pallidulus, in Nova Scotia

John Gilhen


The Maritime Garter Snake, Thamnophis sirtalis pallidulus, is highly variable in pattern and colour. Although this subspecies is largely defined on the basis of colour, four colour morphs have previously been described for the subspecies, including a melanistic form. Based on specimens from Nova Scotia, Canada, a fifth, uncommon erythristic variant is added to the complex colour variation known for the Maritime Garter Snake.


Erratum for figure included.


Maritime Garter Snake; Thamnophis sirtalis pallidulus; erythrism; erythristic; ground colour; scarlet; northern mainland; Nova Scotia; Canada

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