Evolutionary stasis in life history traits between Xenophallus clades isolated during Pliocene marine incursions

Authors

Elias Johnson, Brigham Young University - ProvoFollow
Jerald B. Johnson, Brigham Young University - ProvoFollow

Files

Keywords

Evolution, life history, poeciliid, stasis, ecology

Abstract

Why do some species fail to evolve? The chiral livebearer, Xenophallus umbratilis, is found in Central America. Populations within this species have been isolated from each other for millions of years due to marine incursions, big rivers, and ecological filters downstream, leading to divergent clades (figure below). However, these isolated populations persist under similar ecological conditions, including the absence of predators and in similar headwater habitat types.

BYU ScholarsArchive Citation

Johnson, Elias and Johnson, Jerald B., "Evolutionary stasis in life history traits between Xenophallus clades isolated during Pliocene marine incursions" (2025). Library/Life Sciences Undergraduate Poster Competition 2025. 48.
https://scholarsarchive.byu.edu/library_studentposters_2025/48

Document Type

Article

Publication Date

2025

Language

English

College

Life Sciences

Department

Biology

University Standing at Time of Publication

Senior

Copyright Use Information

https://lib.byu.edu/about/copyright/