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Threadfins (Teleostei: Polynemidae) are a group of fishes named for their elongated and threadlike pectoral‐fin rays. These fishes are commonly found in the world's tropical and subtropical waters, and are an economically important group for people living in these regions, with more than 100,000 t harvested in recent years. However, we do not have a detailed understanding of polynemid evolutionary...
The evolution of heterodonty, the possession of varied tooth morphologies on the jaws of animals, has been relatively unexplored in ray‐finned fishes compared to terrestrial vertebrates, and to an even lesser degree in deep‐sea fish lineages. Lanternfishes (Myctophiformes) are an abundant and species‐rich group endemic to deep‐sea pelagic habitats. In this study, we document the presence of heterodonty...
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