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Remains of juvenile individuals of Rhynchotherium blicki (Frick 1933) mastodon have been collected from sediments of the Upper Miocene (Late Hemphillian) locality of San Gerardo de Limoncito, corresponding with the top of Curré Formation. The recovered material, includes two second left upper deciduous molars and three frag- ments of tusks that were associated to the false gavial Gavialosuchus americanus (Sellards, 1915), remains of a soft shelled turtle Apalone sp., teeth of selachians (sharks and rays) and other icthyolites. The ecological requirements of the taxa suggest the existence of different environmental conditions from open grassland habitats to more closed marine environments like estuaries. Restos de individuos inmaduros del mastodonte Rhynchotherium blicki (Frick 1933) fueron colectados en sedimentos de la localidad de San Gerardo de Limoncito de edad Mioceno superior (Hemphilliano tardío), correspondiente al tope la Formación Curré. El material se compone de dos segundos molares deciduos, superiores, izquierdos y tres fragmentos de defensas asociados con restos del falso gavial Gavialosuchus americanus (Sellards, 1915), la tortuga de caparazón blando Apalone sp., dientes de seláceos (tiburones y rayas) y otros ictiolitos. Esta asociación de taxa, sugieren la existencia de diferentes condiciones ambientales que van desde hábitats de sabanas abiertas a ambientes marinos limitados tipo estuario.

In 1858, American geologist Joseph LeConte published the first scientific report of vertebrate fossils (mastodon, bison and horse) from Central America a brief record of a "mastodon bed" near the old village of Tambla in Honduras. In 1859, American archaeologist Ephraim George Squier also mentioned these fossils, illustrating a lower jaw fragment with a molar and providing specific clues to the location of the bonebed. J. M. Dow subsequently gave a gomphothere molar from the locality to Joseph Leidy at the Academy of Natural Sciences in Philadelphia, USA. Leidy published on the fossil, which still remains in the collection of the Academy, as ?Mastodon ohioticus? or as M. andium, and it was later referred to Rhynchotherium by Osborn and others. This molar is best identified as Cuvieronius hyodon, and the bonebed from which it was derived is near the modern village of Humuya (Tambla in the 1800s), not near the village currently called Tambla. The Tambla ?mastodon bed? has never been relocated, though data provided here should make that possible. Its discovery in the 1850s did not encourage further exploration for vertebrate fossils in Honduras, probably because ?mastodon? fossils were already commonplace in the USA, so the Tambla bonebed did not constitute a remarkable discovery. .