Taxonomic Revision of the Pirate Perches (Percopsiformes: Aphredoderidae) Reveals Three New Species and Elevates Two Subspecies
2023-07
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Taxonomic Revision of the Pirate Perches (Percopsiformes: Aphredoderidae) Reveals Three New Species and Elevates Two Subspecies
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2023-07
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The Southeastern United States is home to exceptionally high fish diversity among temperate latitudes. Species richness and endemism in this region is commonly attributed to historic biogeographic processes dating back
to the Pliocene or earlier, and influences of sea levels through a relatively old though stochastic landscape and drainage
basins. Specific and subspecific differentiation within the Southeastern United States occurs over a small geographic
area and is well documented, though several species of lowland fishes seemingly defy biogeographic and
phylogeographic models and expand well beyond other species ranges without any hypotheses for dispersal. Pirate
Perches, Aphredoderus, are a widespread lowland freshwater fish native to the Eastern half of the United States.
Aphredoderus was thought to contain a single species divided into an Eastern and Western subspecies on either side
of the Appalachian Mountains with a widespread intergrade zone through much of the Eastern Gulf of Mexico and
Southern Atlantic drainages. I use morphology and ddRADseq from specimens spanning the entire range of the genus
to determine species limits within Aphredoderus. I find evidence of five species, four of which exhibit widespread
sympatry in the Southeastern United States. I elevate A. sayanus sayanus and A. sayanus gibbosus to species,
supplement previous descriptions, and describe three new species, A breviopercularis sp. nov., A. retrodorsalis sp.
nov., and A. ornatus sp. nov. This research suggests that expansion through the Pliocene and Pleistocene was
differential and several different historic refugia existed to facilitate allopatric speciation similar to what is proposed
in earlier biogeographic and phylogeographic studies.
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University of Minnesota M.S. thesis.July 2023. Major: Conservation Biology. Advisor: Andrew Simons. 1 computer file (PDF); iv, 46 pages.
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Muller, Tyler. (2023). Taxonomic Revision of the Pirate Perches (Percopsiformes: Aphredoderidae) Reveals Three New Species and Elevates Two Subspecies. Retrieved from the University Digital Conservancy, https://hdl.handle.net/11299/259572.
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