Eocene cichlid fishes from Tanzania, East Africa

Murray, Alison M.

doi:10.1671/0272-4634(2000)020[0651:ecffte]2.0.co;2

Cited by 55 publications

(43 citation statements)

References 15 publications

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“…The authors also considered sedimentation rates, for which minimum estimates and error on the 206 Pb/ 238 U dates allow a minimum bound of 45.0 Ma for T. mannardi and the crown chiropteran divergence. This mid-Eocene age is also consistent with the Mahenge fossil fish fauna (e.g., Murray, 2000).…”

Section: Crown Chiropterasupporting

confidence: 84%

Four mammal fossil calibrations: balancing competing palaeontological and molecular considerations

Phillips

2015

Palaeontologia Electronica

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Section: Crown Chiropterasupporting

confidence: 84%

Four mammal fossil calibrations: balancing competing palaeontological and molecular considerations

Phillips

2015

Palaeontologia Electronica

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“…Three genes, NADH 2 , cytochrome b, and the control region (D-loop), were concatenated for the Lake Barombi Mbo and Tanganyika radiations, whereas control region alone was employed for the Lake Malawi, serranochromine, and Lake Victoria Region haplochromine radiations (Supporting Information S4, Supplementary Material online). Polymorphisms at Murray (2000Murray ( , 2001aMurray ( , 2001b NOTE.-Dates were based on reported literature, where only epochs were reported International Commission of Stratigraphy dates were used (http:// www.stratigraphy.org).…”

Section: Dating African Cichlid Radiationsmentioning

confidence: 99%

Age of Cichlids: New Dates for Ancient Lake Fish Radiations

Genner

Seehausen

Lunt

et al. 2007

Molecular Biology and Evolution

265

344

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Timing divergence events allow us to infer the conditions under which biodiversity has evolved and gain important insights into the mechanisms driving evolution. Cichlid fishes are a model system for studying speciation and adaptive radiation, yet, we have lacked reliable timescales for their evolution. Phylogenetic reconstructions are consistent with cichlid origins prior to Gondwanan landmass fragmentation 121-165 MYA, considerably earlier than the first known fossil cichlids (Eocene). We examined the timing of cichlid evolution using a relaxed molecular clock calibrated with geological estimates for the ages of 1) Gondwanan fragmentation and 2) cichlid fossils. Timescales of cichlid evolution derived from fossil-dated phylogenies of other bony fishes most closely matched those suggested by Gondwanan breakup calibrations, suggesting the Eocene origins and marine dispersal implied by the cichlid fossil record may be due to its incompleteness. Using Gondwanan calibrations, we found accumulation of genetic diversity within the radiating lineages of the African Lakes Malawi, Victoria and Barombi Mbo, and Palaeolake Makgadikgadi began around or after the time of lake basin formation. These calibrations also suggest Lake Tanganyika was colonized independently by the major radiating cichlid tribes that then began to accumulate genetic diversity thereafter. These results contrast with the widely accepted theory that diversification into major lineages took place within the Tanganyika basin. Together, this evidence suggests that ancient lake habitats have played a key role in generating and maintaining diversity within radiating lineages and also that lakes may have captured preexisting cichlid diversity from multiple sources from which adaptive radiations have evolved.

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“…The cichlid specimens from the much larger 1996 collection (¢gure 2) represent at least ¢ve di¡erent species based on osteological characteristics such as the shape of the supraoccipital, frontal, opercular and hyomandibular bones (Murray 2000). Fryer et al (1983) pointed out that di¡erent fossil species might be proposed when in fact they are merely two or more morphs of the same species.…”

Section: The Cichlids Of Mahengementioning

confidence: 99%

“…Position B is the most basal position based on the possession of a single pre-dorsal ( supraneural) bone. The scale characteristics from Lippitsch (1993Lippitsch ( , 1995 indicate that the Mahenge cichlids are positioned at C (see Murray 2000). the same species with di¡erent food sources.…”

Section: The Cichlids Of Mahengementioning

confidence: 99%

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The oldest fossil cichlids (Teleostei: Perciformes): indication of a 45 million-year-old species flock

Murray

2001

Proc. R. Soc. Lond. B

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Five closely related species of fossil cichlids collected from an Eocene site in Tanzania, East Africa, represent the oldest known cichlids. The specimens are whole-body, articulated ¢shes that are extremely well preserved and, therefore, have the potential to add to our knowledge of the history of this family. Modern cichlids are particularly well known for the numerous species £ocks of the East African Great Lakes. A great deal of research is ongoing regarding all aspects of the ¢shes in these £ocks, including their evolutionary history. The new collection of fossils reported here is interpreted as representing a species £ock that arose in a small crater lake. These fossils indicate that cichlids' ability to form species £ocks evolved early in the history of this family.

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Eocene cichlid fishes from Tanzania, East Africa

Cited by 55 publications

References 15 publications

Four mammal fossil calibrations: balancing competing palaeontological and molecular considerations

Four mammal fossil calibrations: balancing competing palaeontological and molecular considerations

Age of Cichlids: New Dates for Ancient Lake Fish Radiations

The oldest fossil cichlids (Teleostei: Perciformes): indication of a 45 million-year-old species flock

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