Molecular phylogeny reveals distinct evolutionary lineages of the banded krait, Bungarusfasciatus (Squamata, Elapidae) in Asia

L Biakzuala, HT Lalremsanga, V Santra, A Dhara… - Scientific Reports, 2023 - nature.com
L Biakzuala, HT Lalremsanga, V Santra, A Dhara, MT Ahmed, ZB Mallick, S Kuttalam…
Scientific Reports, 2023nature.com
The banded krait, Bungarus fasciatus is a widespread elapid snake, likely to comprise
several distinct species in different geographic regions of Asia. Therefore, based on
molecular phylogenetics and comparative morphology data, we present an overview of the
systematic composition of the species to delimit potential biogeographic boundaries. Our
phylogenetic analyses, based on four mitochondrial genes, reveal the existence of at least
three evolutionary lineages within B. fasciatus, corresponding to Indo-Myanmar, Sundaic …
Abstract
The banded krait, Bungarusfasciatus is a widespread elapid snake, likely to comprise several distinct species in different geographic regions of Asia. Therefore, based on molecular phylogenetics and comparative morphology data, we present an overview of the systematic composition of the species to delimit potential biogeographic boundaries. Our phylogenetic analyses, based on four mitochondrial genes, reveal the existence of at least three evolutionary lineages within B.fasciatus, corresponding to Indo-Myanmar, Sundaic and eastern Asian lineages. We are convinced that there are at least three taxonomic entities within the nomen B.fasciatus and restrict the distribution of B.fasciatus sensu stricto to the Indo-Myanmar region. We also provide additional natural history data of the taxon from eastern India. Finally, we advocate further studies to establish the degree of reproductive isolation among these diverging evolutionary lineages and to reassess the systematic status of this species complex especially the Sundaic and eastern Asian lineages.
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