'Paedocannibal' morph barred tiger salamanders (Ambystoma tigrinum mavortium) from eastern South Dakota

Kjersten L. Larson, Walter Duffy, Erin Johnson, Michele F. Donovan, Michael J. Lannoo

Research output: Contribution to journalArticle

10 Scopus citations

Abstract

We report characteristics of a previously unknown population of Arabystoma tigrinum mavortium (barred tiger salamander) from eastern South Dakota, a location that extends the formerly known range of this subspecies about 150 km north. This population contains paedotypic animals and a small percentage of cannibal morphs. At least one cannibal morph was paedotypic. The vomerine tooth hypertrophy characteristic of cannibal morphs described here differs from the cannibal morph A. t. tigrinum from nearby (about 160 km) northwestern Iowa; in particular the pair of caudolateral tooth ridges has smaller teeth in individuals from the A. t. mavortium population. The study wetland is located near the convergence of four recognized (pending revision) tiger salamander subspecies (A. t. diaboli and A. t. melanosticum in addition to A. t. mavortium and A. t. tigrinum), making it an excellent region to examine subspecific morphological features in light of shared ecological factors. We suggest creating a formal nomenclatural distinction between cannibal morph larval phenotypes and cannibal morph paedotypic phenotypes.

Original languageEnglish (US)
Pages (from-to)124-139
Number of pages16
JournalAmerican Midland Naturalist
Volume141
Issue number1
DOIs
StatePublished - Jan 1999

ASJC Scopus subject areas

  • Ecology, Evolution, Behavior and Systematics

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