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Evolutionary history of lorisiform primates
1Department of Anthropology, Washington University, St. Louis, Mo. 63130, USA.
Summary
This study integrates fossil, morphological, and molecular data to explore lorisoid evolution. Evidence suggests Asian and African lorisines share a common ancestor, challenging the idea of a distinct African clade.
Area of Science:
- Paleontology
- Evolutionary Biology
- Primate Phylogenetics
Background:
- Lorisoid evolution remains incompletely understood, with debated ancestral links to Eocene prosimians.
- Fossil discoveries in Europe and Africa offer potential insights into early strepsirhine lineages.
Purpose of the Study:
- To provide a comprehensive overview of lorisoid evolution by integrating diverse data sources.
- To clarify phylogenetic relationships among extant and extinct lorisid clades.
Main Methods:
- Integration of data from the fossil record, primate morphology, behavior, and molecular studies.
- Analysis of fossil taxa from the Eocene and Miocene, including European adapoids and African prosimians.
- Review of neontological data to resolve branching sequences within lorisid clades.
Main Results:
- Eocene primates like Anchomomys and African taxa show potential strepsirhine affinities but lack direct lorisiform ancestry.
- Miocene lorisoids were established in East Africa, with evidence supporting a shared ancestry for Asian and African lorisines.
- Fossil galagines are known from Namibia, and lorisines from Miocene Asia, supporting distinct evolutionary histories.
Conclusions:
- The hypothesis of an African clade excluding Asian lorisines is less supported.
- Specialized foraging modes likely drove integrated evolutionary changes in lorisines and galagines.
- Ongoing studies of extant galagines illuminate speciation processes in an ecological context.
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