LACM 149371 (Natural History Museum of Los Angeles County specimen 149371) is an enigmatic fossil mammalian tooth from the Paleogene (66 to 23 million years ago, mya) of Peru. It is from the Santa Rosa fossil site, which is of uncertain age but possibly late Eocene (55 to 34 mya) or Oligocene (34 to 23 mya). The tooth is poorly preserved and may have been degraded by acidic water or because it passed through a predator's digestive tract. Its largest dimension is 2.65 mm. It is triangular in shape and bears six cusps that surround the middle of the tooth, where there are three basins (fossae). Crests connects the cusps and separate the fossae. The microscopic structure of the enamel is poorly preserved.
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| - LACM 149371 (Natural History Museum of Los Angeles County specimen 149371) és una enigmàtica dent fòssil de mamífer que data del Paleogen (fa 66-23 milions d'anys) del Perú. El fòssil fou trobat al jaciment de Santa Rosa, que possiblement data de l'Eocè superior (55-34 Ma) o l'Oligocè (34-23 Ma), tot i que no se'n coneix l'antiguitat amb certesa. LACM 149371 s'ha preservat malament i podria haver estat degradat per aigua àcida o el pas pel tracte digestiu d'un depredador. La seva dimensió més gran és de 2,65 mm. Es tracta d'una dent triangular amb sis cúspides que n'envolten el centre, on hi ha tres conques (o fosses). Presenta crestes que connecten les cúspides i separen les fosses entre si. L'estructura microscòpica de l'esmalt dental no s'ha conservat bé. (ca)
- LACM 149371 (Natural History Museum of Los Angeles County specimen 149371) is an enigmatic fossil mammalian tooth from the Paleogene (66 to 23 million years ago, mya) of Peru. It is from the Santa Rosa fossil site, which is of uncertain age but possibly late Eocene (55 to 34 mya) or Oligocene (34 to 23 mya). The tooth is poorly preserved and may have been degraded by acidic water or because it passed through a predator's digestive tract. Its largest dimension is 2.65 mm. It is triangular in shape and bears six cusps that surround the middle of the tooth, where there are three basins (fossae). Crests connects the cusps and separate the fossae. The microscopic structure of the enamel is poorly preserved. (en)
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| - LACM 149371 (Natural History Museum of Los Angeles County specimen 149371) és una enigmàtica dent fòssil de mamífer que data del Paleogen (fa 66-23 milions d'anys) del Perú. El fòssil fou trobat al jaciment de Santa Rosa, que possiblement data de l'Eocè superior (55-34 Ma) o l'Oligocè (34-23 Ma), tot i que no se'n coneix l'antiguitat amb certesa. LACM 149371 s'ha preservat malament i podria haver estat degradat per aigua àcida o el pas pel tracte digestiu d'un depredador. La seva dimensió més gran és de 2,65 mm. Es tracta d'una dent triangular amb sis cúspides que n'envolten el centre, on hi ha tres conques (o fosses). Presenta crestes que connecten les cúspides i separen les fosses entre si. L'estructura microscòpica de l'esmalt dental no s'ha conservat bé. LACM 149371 fou descrit el 2004 per Francisco Goin et al., que l'identificaren provisionalment com a última molar superior del costat esquerre. Tot i veure-hi semblances amb els ungulats sud-americans, alguns rosegadors primitius i els multituberculats, els investigadors conclogueren que probablement es tractava d'una dent de gondwanateri (un grup de mamífers poc coneguts que visqueren entre el Cretaci i l'Eocè a algunes parts del supercontinent meridional de Gondwana). Segons ells, el gondwanateri més proper a LACM 149371 era el feruglioteri, del Cretaci de l'Argentina. (ca)
- LACM 149371 (Natural History Museum of Los Angeles County specimen 149371) is an enigmatic fossil mammalian tooth from the Paleogene (66 to 23 million years ago, mya) of Peru. It is from the Santa Rosa fossil site, which is of uncertain age but possibly late Eocene (55 to 34 mya) or Oligocene (34 to 23 mya). The tooth is poorly preserved and may have been degraded by acidic water or because it passed through a predator's digestive tract. Its largest dimension is 2.65 mm. It is triangular in shape and bears six cusps that surround the middle of the tooth, where there are three basins (fossae). Crests connects the cusps and separate the fossae. The microscopic structure of the enamel is poorly preserved. LACM 149371 was described in 2004 by Francisco Goin and colleagues, who tentatively interpreted the tooth as a left last upper molar. Although they saw similarities with South American ungulates, some early rodents, and multituberculates, they believed the tooth was most likely of a gondwanathere. Among gondwanatheres—a small and poorly known group otherwise known from the Cretaceous through Eocene of some of the southern continents (Gondwana)—they thought the Cretaceous Argentinian Ferugliotherium to be the most similar. (en)
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