Phylogenomics, biogeography and taxonomic revision of New Guinean pythons (Pythonidae, Leiopython) harvested for international trade

• Published in: Molecular phylogenetics and evolution 2021-05, Vol.158, p.106960-106960, Article 106960
• Main Authors: Natusch, Daniel J.D., Esquerré, Damien, Lyons, Jessica A., Hamidy, Amir, Lemmon, Alan R., Lemmon, Emily Moriarty, Riyanto, Awal, Keogh, J. Scott, Donnellan, Stephen
• Format: Article
• Language: English
• Subjects: Albertisii; Biogeography; CITES; Conservation Indonesia; Meridionalis; Papua; Wildlife trade
• ISSN: 1055-7903; 1095-9513
• DOI: 10.1016/j.ympev.2020.106960

[Display omitted] •Enigmatic pythons (Genus Leiopython) harvested from New Guinea currently comprise six species.•Comprehensive molecular and morphological re-analysis shows only two of these species are valid.•The biogeography of these species is unique and the taxa occur in sympatry.•There are conservation implications for describing widespread species with only small samples. The large and enigmatic New Guinean pythons in the genus Leiopython are harvested from the wild to supply the international trade in pets. Six species are currently recognized (albertisii, biakensis, fredparkeri, huonensis, meridionalis, montanus) but the taxonomy of this group has been controversial. We combined analysis of 421 nuclear loci and complete mitochondrial genomes with morphological data to construct a detailed phylogeny of this group, understand their biogeographic patterns and establish the systematic diversity of this genus. Our molecular genetic data support two major clades, corresponding to L. albertisii and L. fredparkeri, but offer no support for the other four species. Our morphological data also only support two species. We therefore recognize L. albertisii and L. fredparkeri as valid species and place L. biakensis, L. meridionalis, L. huonensis and L. montanus into synonymy. We found that L. albertisii and L. fredparkeri are sympatric in western New Guinea; an atypical pattern compared to other Papuan species complexes in which the distributions of sister taxa are partitioned to the north and south of the island’s central mountain range. For the purpose of conservation management, overestimation of species diversity within Leiopython has resulted in the unnecessary allocation of resources that could have been expended elsewhere. We strongly caution against revising the taxonomy of geographically widespread species groups when little or no molecular genetic data and only small morphological samples are available.