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4 results for “Tarsius”
Small, odd and old: The mysterious Tarsius pumilus is the most basal Sulawesi tarsier
<p>In this study we present the first genetic evidence of the phylogenetic position of <em>Tarsius pumilus</em>, the mountain tarsier of Sulawesi, Indonesia. This mysterious primate is the only Eastern tarsier species that occurs exclusively in cloud forests above 1800 m asl. It exhibits striking morphological peculiarities – most prominently its extremely reduced body size, which led to the common name of "pygmy tarsier". However, our results indicate that <em>T. pumilus</em> is not an aberrant form of a lowland tarsier, but in fact the most basal of all Sulawesi tarsiers. Applying a Bayesian multi-locus coalescent approach we dated the divergence between the <em>T. pumilus</em> lineage and the ancestor of all other extant tarsiers to 9.88 MYA. This is as deep as the split between the two other tarsier genera <em>Carlito</em> (Philippine tarsiers) and <em>Cephalopachus</em> (Western tarsiers), and predates further tarsier diversification on Sulawesi by around 7 million years. The date coincides with the deepening of marine environment between eastern and western Sulawesi, which likely led to allopatric speciation between <em>T. pumilus</em> or its predecessor in the west and the ancestor of all other Sulawesi tarsiers in the east. As the split preceded the emergence of permanent mountains in western Sulawesi, it is unlikely that the shift to montane habitat has driven the formation of the <em>T. pumilus</em> lineage.</p>
Small, odd and old: The mysterious Tarsius pumilus is the most basal Sulawesi tarsier
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Tarsius sp. "Manado form" Tangkoko Batuangus Nature Reserve, NE Sulawesi. Photo: Roland Seitre in Tarsiidae
Tarsius sp. "Manado form" Tangkoko Batuangus Nature Reserve, NE Sulawesi. Photo: Roland Seitre
On following pages: 3. Selayar Tarsier (Tarsius tarsien); 4. Makassar Tarsier (Tarsius fuscus); 5. Dian's Tarsier (Tarsius dentatus); 6. Peleng Tarsier (Tarsius pelengensis); 7. Great Sangihe Tarsier (Tarsius sangirensis); 8. Siau Island Tarsier (Tarsius tumpara); 9. Sulawesi Mountain Tarsier (Tarsius pumilus); 10. Lariang Tarsier (Tarsius lariang); 11. Wallace's Tarsier (Tarsius wallace). in Tarsiidae
On following pages: 3. Selayar Tarsier (Tarsius tarsien); 4. Makassar Tarsier (Tarsius fuscus); 5. Dian's Tarsier (Tarsius dentatus); 6. Peleng Tarsier (Tarsius pelengensis); 7. Great Sangihe Tarsier (Tarsius sangirensis); 8. Siau Island Tarsier (Tarsius tumpara); 9. Sulawesi Mountain Tarsier (Tarsius pumilus); 10. Lariang Tarsier (Tarsius lariang); 11. Wallace's Tarsier (Tarsius wallace).
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