Genetic and Morphometric Variation of the Genus Nyctixalus in Indonesia Based on mtDNA 16S rRNA Gene

  • Rouland Ibnudarda Animal Bioscience Study Program, Department of Biology, Faculty of Mathematics and Natural Sciences, IPB University, Bogor, 16680, West Java, Indonesia
  • Ahmad Muammar Kadafi Department of Biology, Faculty of Mathematics and Natural Sciences, Universitas Palangka Raya, Palangka Raya, Central Kalimantan, Indonesia. https://orcid.org/0000-0003-4646-687X
  • Bagus Priambodo Department of Biology, Faculty of Mathematics and Natural Sciences, Universitas Negeri Malang, Malang, Indonesia https://orcid.org/0000-0002-0195-0177
  • Achmad Farajallah Department of Biology, Faculty of Mathematics and Natural Sciences, IPB University, Bogor, 16680, West Java, Indonesia https://orcid.org/0000-0002-7733-6528
  • Dyah Perwitasari-Farajallah Department of Biology, Faculty of Mathematics and Natural Sciences, IPB University, Bogor, 16680, West Java, Indonesia https://orcid.org/0000-0001-6206-1675
  • Amir Hamidy Laboratory of Herpetology, Research Center for Biosystematics and Evolution, National Research and Innovation Agency (BRIN), Widyasatwaloka Building, Jl. Raya Jakarta Bogor Km. 46 Cibinong 16911, West Java, Indonesia
Keywords: Anura, Molecular phylogeny, Nyctixalus, Rhacophorid, Southeast Asia

Abstract

The genus Nyctixalus was first described by Boulenger in 1882. Previous systematic studies of this group primarily focused on its relationships with other rhacophorid frogs and did not explore inter- and intraspecific variation in detail. This study aimed to determine the position of Indonesian species within their genus. We used DNA barcoding of the mitochondrial 16S rRNA gene and conducted a morphological analysis. Mitochondrial genealogies were constructed based on NJ, ML, and BI analyses, while uncorrected p-distance was also calculated. The Mann-Whitney U-test and PCA were used to analyse variations among species for each character component. Dissimilarity may contribute to measurable group structure. DNA barcoding revealed that Nyctixalus forms a monophyletic group. The PCA analysis revealed that N. margaritifer population from Java formed a group, while N. pictus could not be separated on the scatter plot. DNA barcoding revealed that Nyctixalus forms a monophyletic group. The genetic distance within the population of N. margaritifer (0–1.52 %) and N. spinosus (0–0.2 %) showed a variation of intraspecific genetic distance. However, in the two allopatric populations of N. pictus Kalimantan and Sumatra (p-distance = 4.3–4.6 %), there are high variations (6.9–9 %) between populations from Sumatra and Malaysia. These findings suggest that N. anodon van Kampen, 1907, from Kayu Tanam, Sumatra Barat, Indonesia, represents a distinct species from N. pictus Peters, 1871, originally described from Sarawak, Malaysia.

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Published
2025-05-23
How to Cite
Ibnudarda, R., Kadafi, A. M., Priambodo, B., Farajallah, A., Perwitasari-Farajallah, D. and Hamidy, A. (2025) “Genetic and Morphometric Variation of the Genus Nyctixalus in Indonesia Based on mtDNA 16S rRNA Gene”, Journal of Tropical Biodiversity and Biotechnology, 10(2), p. jtbb13642. doi: 10.22146/jtbb.13642.
Section
Research Articles