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... H5 haplotype, consisting of individuals sampled from Zoo Negara (unknown origins), clustered together with the H6 haplotype from East Kalimantan into the b clade in all the phylogenetic trees. Except for those two individuals, the samples of unknown origin did not reveal any new haplotypes (Table 4). In general, the geographic distribution of haplotypes seen in the phylogenetic trees and the haplotype network complemented each other. ...Context 2
... the other holding areas consisting of individuals of unknown origin, Cikananga Wildlife Rescue Centre recorded the highest haplotype distribution, with three haplotypes. Individuals sampled from the Singapore Zoological Gardens and Hong Kong Wetland Park corresponded to two haplotypes each (Table 4), all of which were also found in individuals of known origin. The S NN analysis revealed that the populations from the four geographic regions of Sumatra, Peninsular Malaysia, Sarawak, and East Kalimantan are genetically different, even though the H2 haplotype was found in both Peninsular Malaysia and Sarawak. ...Similar publications
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Citations
Advances in molecular biology and genetics are revealing that many recognized crocodylian species are complexes of two or more cryptic species. These discoveries will have a profound impact on interpretation of the crocodyliform fossil record. Our understanding of ranges of intraspecific variation in modern crocodylian morphology may be based on multiple species and thus express both intraspecific and interspecific variation. This raises questions about our ability to recognize modern species in the fossil record, and it also indicates that specimens from disparate localities or horizons may represent not single widespread species, but multiple related species. Ranges of variation in modern species require a thorough re-evaluation, and we may have to revisit previous perceptions of past crocodyliform diversity, rates of evolution or anagenetic lineages in stratigraphic succession. These challenges will not be unique to those studying crocodyliforms and will require sophisticated approaches to variation among modern and fossil specimens.
