2010
DOI: 10.1590/s1679-62252010000300008
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A new genus and species of Heroini (Perciformes: Cichlidae) from the early Eocene of southern South America

Abstract: The Lumbrera Formation is the uppermost unit of the Salta Group, which crops out in northwestern Argentina. The paleoenvironment of the Lumbrera Formation is interpreted as a perennial lake deposited under temperate climatic conditions during the early to middle Eocene. Its fossil content is made up of palynomorphs, insects, crocodiles, turtles, lizards, and mammals, besides an ichthyofauna formed by cichlids, poeciliids and dipnoans. †Plesioheros chauliodus is described based on a single individual from this … Show more

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Cited by 20 publications
(24 citation statements)
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“…1), which is consistent with the known fossil distributions of the oldest described cichlid taxa from these geographic lineages, extending to the Eocene approximately 40 to 49 Ma (e.g. [28], [32], [33]). While Cretaceous-age fossils are currently lacking for the family Cichlidae, a vicariant origin for the family cannot be refuted by the lack of fossils.…”
Section: Discussionsupporting
confidence: 85%
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“…1), which is consistent with the known fossil distributions of the oldest described cichlid taxa from these geographic lineages, extending to the Eocene approximately 40 to 49 Ma (e.g. [28], [32], [33]). While Cretaceous-age fossils are currently lacking for the family Cichlidae, a vicariant origin for the family cannot be refuted by the lack of fossils.…”
Section: Discussionsupporting
confidence: 85%
“…While Cretaceous-age fossils are currently lacking for the family Cichlidae, a vicariant origin for the family cannot be refuted by the lack of fossils. The East African and Argentinian fossils establish a minimum age for cichlids at ∼40–46 Ma [28], [29], [31], [32], [33] and double the age of cichlids from previously known fossil specimens. Our divergence-time estimates are consistent with both the sequence and timing of Gondwanan breakup, and they indicate that the diversification of cichlid lineages may have occurred in the Mesozoic.…”
Section: Discussionmentioning
confidence: 99%
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“…However, the stratigraphically oldest fossil cichlids are Eocene in age (approx. 46 Ma) [12,13], implying a gap of approximately 90 Myr in the early history of the group. This, along with the absence of Early Cretaceous fossils belonging to more inclusive and taxonomically diverse clades that contain cichlids, has led some to abandon the orthodoxy of Mesozoic vicariance in favour of Cenozoic dispersal to explain the present-day distribution of cichlids [12,14].…”
Section: Introductionmentioning
confidence: 99%