A new species of montane toad, Duttaphrynus phawngpui, has been described from Phawngpui National Park (Blue Mountain) in Lawngtlai district of Mizoram, researchers report in the journal Taprobanica.
Discovery and identification
The population was recorded at about 2,144 metres above sea level and, so far, is known only from its type locality in Phawngpui National Park, the authors say. The team that documented the species includes researchers from Mizoram University, Assam Don Bosco University, collaborators from Indonesia and the organisation Help Earth, Guwahati. The paper lists authors Malsawm Dawngliana, Holiness Warjri, A. A. Thasun Amarasinghe, Amit K. Bal, Vanlal Hruaia, Mara D. Hlychho, Hmar T. Lalremsanga, Mathipi Vabeiryureilai and Jayaditya Purkayastha.
Researchers used an integrated approach combining external morphology, statistical morphometrics and mitochondrial DNA sequencing to establish that the Phawngpui population represents a distinct taxon within the Duttaphrynus stuarti species group. Genetic analysis of the mitochondrial 16S gene showed divergences of 3.8% to 5.5% from closely related species, supporting the recognition of a separate evolutionary lineage.
Distinctive features
The newly described toad is relatively small, with snout-to-vent lengths of 47.72 mm to 56.26 mm among the specimens examined. Key diagnostic characters cited by the authors include an indistinct tympanum, the general absence of cranial ridges that are present in some congeners, moderate toe webbing and a dorsum covered by glandular warts and irregular dark blotches. A thin mid-dorsal stripe running from the snout toward the urostyle is reported as a particularly distinctive marking.
| Feature | Observation |
|---|---|
| Elevation (type locality) | ~2,144 m (Phawngpui National Park) |
| Snout–vent length | 47.72–56.26 mm |
| Mitochondrial 16S divergence | 3.8%–5.5% from close relatives |
| Colour and pattern | Yellowish-brown to earthy brown with dark blotches; narrow pale dorsal stripe; cream to pale-yellow underside with dark marbling |
Analytical evidence
In addition to genetic distances, the authors report a morphometric separation: the first two principal components in their analysis accounted for 94% of the variation, and the two specimens representing the Phawngpui lineage formed a distinct cluster separate from D. stuarti, D. chandai and D. dhara. The combined morphological and molecular evidence was judged sufficient by the researchers to describe the lineage as a new species, named Duttaphrynus phawngpui.
Conservation and regional significance
The discovery highlights the rich, still incompletely documented amphibian diversity of Mizoram’s high-elevation forests. Phawngpui National Park — locally known as Blue Mountain — is a recognised biodiversity area in the state. Because the new toad has so far been recorded only from its type locality, the authors’ findings imply potential endemism and underscore the need for targeted surveys to determine the taxon’s actual distribution, population size and any threats.
- Species: Duttaphrynus phawngpui (newly described)
- Type locality: Phawngpui National Park, Lawngtlai district
- Evidence: morphological characters, morphometric analysis and mitochondrial 16S sequence divergence
The study illustrates how systematic fieldwork combined with genetic methods can reveal cryptic diversity in montane ecosystems. For conservation planning, researchers and managers will need baseline information on habitat specificity, seasonal activity, reproductive biology and potential anthropogenic pressures — none of which are yet detailed in the initial description.
The description is published in Taprobanica and adds to an expanding body of work on amphibian systematics in the northeastern region of India, where mountainous and forested habitats continue to yield new taxa to science.
