Abstract

Of several Late Devonian conodont apparatuses being studied as part of ongoing investigations in southeastern Alaska, two are sufficiently distinct to warrant description at this time. Although the reconstruction of conodont apparatuses in large assemblages frequently presents workers with more than one solution, sometimes a combination of elements in low-diversity collections occurs often enough to leave less doubt that they belong to a single species. This is the case for the two taxa described here. Representative individuals of Polygnathus sinuosus wadleighensis n. ssp. are characterized by an anguliplanate Pa element and by ramiform elements that bear long, well-spaced denticles. Representative individuals of Polygnathus buddingtoni n. sp. have a Pa element resembling that of Polygnathus webbi in several features but with a shorter carina; the ramiform elements are robust and bear discrete, stout denticles. These Alaskan occurrences are of middle Frasnian age.

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