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Tupaia miocenica
''Tupaia miocenica'' is a fossil treeshrew from the Miocene of Thailand. Known only from a single tooth, an upper first or second molar, it is among the few known fossil treeshrews. With a length of 3.57 mm, the tooth is large for a treeshrew. At the back lingual corner (the side of the tongue), the tooth shows a small cusp, the hypocone, that is separated from the protocone in front of it by a narrow valley. The condition of the hypocone distinguishes this species from various other treeshrews. In addition, the presence of a well-developed but simple mesostyle (a small cuspule) is distinctive.
==Taxonomy==
''Tupaia miocenica'' was described in 1997 by French paleontologists Pierre Mein and Léonard Ginsburg in a report on the fossil mammals of Li Mae Long, a Miocene site in Thailand.〔Mein and Ginsburg, 1997, p. 804〕 The animal is known from a single tooth, which according to Mein and Ginsburg's comparisons most closely resembles the living treeshrews of the genus ''Tupaia''.〔Mein and Ginsburg, 1997, pp. 804–805〕 The specific name, ''miocenica'', refers to the animal's occurrence during the Miocene.〔 Only a few other fossil treeshrews are known, and ''T. miocenica'' is the only fossil species from Thailand.〔Sargis, 2004, pp. 56–57〕 When it was described, it was the only Miocene representative of ''Tupaia'',〔 but a second species, ''Tupaia storchi'', was named from the Late Miocene of Lufeng, China, in 2012.〔Ni and Qiu, 2012〕
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