Novel island species elucidate a species complex of Neotropical crocodiles
The evolutionary history of Neotropical crocodiles has remained elusive. They inhabit a broad geographic range with populations spanning from coastal, inland, and insular locations. Using a selection of natural insular, coastal, and one inland population of C. acutus, coastal C. moreletii, and the single surviving population of C. rhombifer, we discovered a remarkable genetic diversity for the group. Moreover, geometric morphometric results of skull shapes shows that these crocodylus species span a morphological cline. We recovered a high genetic differentiation between C. moreletii, C. rhombifer, and five clusters of C. acutus. The genetic and geographic differences among the C. acutus clusters were used to suggest these may be a species complex. Several ecological, morphological and genetics traits are identified in the well-studied populations from Banco Chinchorro and Cozumel islands off the Mexican Yucatan Peninsula to support discrete species designations for these populations. This work suggests the presence of rapid, recent evolution of several cryptic Crocodylus species throughout the Neotropics.
Authors
- Héctor González-Cortés
- Hans C. E. Larsson (ORCID: https://orcid.org/0000-0002-6377-4770)
- Marco A. López‐Luna (ORCID: https://orcid.org/0000-0003-2259-544X)
- Jose Avila Cervantes (ORCID: https://orcid.org/0000-0001-9808-9733)
- Jané Salazar
- Marta Vargas
- Miryam Venegas‐Anaya (ORCID: https://orcid.org/0000-0003-4287-0162)
- Gabriel Barrios-Quiroz
- W. Owen McMillan (ORCID: https://orcid.org/0000-0003-2805-2745)
- Pierre Charruau (ORCID: https://orcid.org/0000-0001-7829-9469)
- Jeffrey Cedeño (ORCID: https://orcid.org/0009-0009-8742-0879)
- Jonathan S Pérez-Flores
- Hoai-Nam Bui
- David A Macías-Díazg
Institutions
- Smithsonian Tropical Research Institute (PA)
- University of Quintana Roo (MX)
- Altera (United States) (US)
- Universidad Partenón de Cozumel (MX)
- Geospatial Research (United Kingdom) (GB)
- El Colegio de la Frontera Sur (MX)
- McGill University (CA)
- Universidad Juárez Autónoma de Tabasco (MX)
Publication Details
- Journal
- Molecular Phylogenetics and Evolution
- Published
- 2025-03-30
- DOI
- https://doi.org/10.1016/j.ympev.2025.108341
- Citations
- 2
- Primary Topic
- Evolution and Paleontology Studies
- Type
- article
- Field-Weighted Citation Impact
- 8.66
Funders
- McGill University
- Canada Foundation for Innovation
- Consejo Nacional de Ciencia y Tecnología
- Smithsonian Tropical Research Institute
- Natural Sciences and Engineering Research Council of Canada
- National Research Council Canada