Une nouvelle espèce de cœlacanthe. Preuves génétiques et morphologiques

Pouyaud, Laurent; Wirjoatmodjo, Soetikno; Rachmatika, Ike; Tjakrawidjaja, Agus H.; Hadiaty, Renny Kurnia; Hadie, Wartono

doi:10.1016/s0764-4469(99)80061-4

Cited by 57 publications

(18 citation statements)

References 14 publications

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“…Pouyaud et al (10) reported a level of sequence divergence similar to the level that we found for cytochrome b and 12S rRNA, but the estimated time of divergence was 1.4 million years based on 12S rRNA and 1.2 million years based on cytochrome b. Both of these dates are more recent than the most recent date consistent with our data.…”

Section: Resultssupporting

confidence: 90%

“…In the other case, a difference between the African fish and the Indonesian fish was not detected by Pouyaud et al, but was confirmed in the present study by three separate sequencing reactions from two different PCR products. We conclude that there are six errors in the sequence presented by Pouyaud et al (10). Interestingly, it appears that the Comorean fish sequence published in Pouyaud et al differs at two sites from the sequence in GenBank (positions 486 and 913 of Pouyaud et al's figure 1).…”

Section: Resultsmentioning

confidence: 57%

“…The region that we sequenced included the 1,829 bases that were reported by Pouyaud et al (10). Because the same individual was the source of DNA for both studies, any differences between the sequences are the result of errors in one of the sequences.…”

Section: Resultsmentioning

confidence: 99%

“…Pouyaud et al (10) described the Indonesian coelacanth as a new species, Latimeria menadoensis, based on both molecular and morphological grounds. Briefly, those authors sequenced 1,829 bp from parts of two mitochondrial genes of the Indonesian coelacanth and reported those sequences to be 4.85% divergent from cytochrome b and 2.85% divergent from 12S rRNA sequences published from a Comorean specimen (11).…”

mentioning

confidence: 99%

“…They estimated the time since the last common ancestor to be 1.22 million years based on cytochrome b and 1.42 million years based on 12S rRNA sequences. Additionally, Pouyaud et al (10) reported nine morphological traits that purportedly differentiate L. menadoensis from L. chalumnae (2).…”

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confidence: 99%

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Two living species of coelacanths?

Holder

Erdmann

Wilcox

et al. 1999

Proc. Natl. Acad. Sci. U.S.A.

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During the period of September 1997 through July 1998, two coelacanth fishes were captured off Manado Tua Island, Sulawesi, Indonesia. These specimens were caught almost 10,000 km from the only other known population of living coelacanths, Latimeria chalumnae, near the Comores. The Indonesian fish was described recently as a new species, Latimeria menadoensis, based on morphological differentiation and DNA sequence divergence in fragments of the cytochrome b and 12S rRNA genes. We have obtained the sequence of 4,823 bp of mitochondrial DNA from the same specimen, including the entire genes for cytochrome b, 12S rRNA, 16S rRNA, four tRNAs, and the control region. The sequence is 4.1% different from the published sequence of an animal captured from the Comores, indicating substantial divergence between the Indonesian and Comorean populations. Nine morphological and meristic differences are purported to distinguish L. menadoensis and L. chalumnae, based on comparison of a single specimen of L. menadoensis to a description of five individuals of L. chalumnae from the Comores. A survey of the literature provided data on 4 of the characters used to distinguish L. menadoensis from L. chalumnae from an additional 16 African coelacanths; for all 4 characters, the Indonesian sample was within the range of variation reported for the African specimens. Nonetheless, L. chalumnae and L. menadoensis appear to be separate species based on divergence of mitochondrial DNA.

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Section: Resultssupporting

confidence: 90%

Section: Resultsmentioning

confidence: 57%

Section: Resultsmentioning

confidence: 99%

mentioning

confidence: 99%

mentioning

confidence: 99%

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