2003
DOI: 10.1046/j.1525-142x.2003.03065.x
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The cusp of evolution and development: a model of cichlid tooth shape diversity

Abstract: Tooth shape is a hallmark of repeated evolutionary radiations among cichlid fishes from East Africa. Cusp shape and number vary both within populations and among closely related species with different feeding behaviors and ecologies. Here, we use histology and scanning electron microscopy to chart the developmental trajectory of tooth shape differences in fishes from Lake Malawi. We demonstrate that species with bi- or tricuspid adult (replacement) teeth initially possess a first-generation unicuspid dentition… Show more

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Cited by 118 publications
(138 citation statements)
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“…The modification of the dentition in fishes is aided in part by the capacity for continuous tooth replacement. For example in the cichlids from Lake Malawi this dental modification is extreme with a shift in tooth morphology from the basic conical unicuspid-type in the first generation to the elaborate selection of multicuspid dental forms observed in adults only after multiple rounds of tooth replacement [11,36] (Fig. 2).…”
Section: Dental Diversity Through Replacement In Fish Dentitionsmentioning
confidence: 99%
“…The modification of the dentition in fishes is aided in part by the capacity for continuous tooth replacement. For example in the cichlids from Lake Malawi this dental modification is extreme with a shift in tooth morphology from the basic conical unicuspid-type in the first generation to the elaborate selection of multicuspid dental forms observed in adults only after multiple rounds of tooth replacement [11,36] (Fig. 2).…”
Section: Dental Diversity Through Replacement In Fish Dentitionsmentioning
confidence: 99%
“…Suction feeders, on the other hand, are characterized by an outer row of large, intermittently spaced teeth with fewer cusps. Like jaw morphology, cichlid dental patterning has evolved rapidly and replicatively, and is associated with both ancient and contemporary trophic evolution (Ruber et al, 1999;Huysseune et al, 2002;Streelman et al, 2003).…”
Section: Rc Albertson and Td Kochermentioning
confidence: 99%
“…The observation that differences in tooth shape may be controlled by changes at a small number of loci suggests that this character has the potential to respond rapidly to selection. Integrating knowledge of vertebrate tooth development with patterns observed among natural cichlid populations, Streelman et al (2003) proposed a simple morphogenetic model to explain the development basis of variation in cichlid dentition.…”
Section: Rc Albertson and Td Kochermentioning
confidence: 99%
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