The Nonindigenous Occurrences section of the NAS species profiles has a new structure. The section is now dynamically updated from the NAS database to ensure that it contains the most current and accurate information. Occurrences are summarized in Table 1, alphabetically by state, with years of earliest and most recent observations, and the tally and names of drainages where the species was observed. The table contains hyperlinks to collections tables of specimens based on the states, years, and drainages selected. References to specimens that were not obtained through sighting reports and personal communications are found through the hyperlink in the Table 1 caption or through the individual specimens linked in the collections tables.

Paramesotriton labiatus
(Paddle-Tail Newt)

Copyright Info
Paramesotriton labiatus (Unterstein, 1930)

Common name: Paddle-Tail Newt

Taxonomy: available through www.itis.govITIS logo

Injurious: This species is listed by the U.S. Fish and Wildlife Service as injurious wildlife.

Native Range: Central and southern China (Krysko et al. 2011).

Hydrologic Unit Codes (HUCs) Explained
Interactive maps: Point Distribution Maps

Nonindigenous Occurrences:

Table 1. States with nonindigenous occurrences, the earliest and latest observations in each state, and the tally and names of HUCs with observations†. Names and dates are hyperlinked to their relevant specimen records. The list of references for all nonindigenous occurrences of Paramesotriton labiatus are found here.

StateFirst ObservedLast ObservedTotal HUCs with observations†HUCs with observations†

Table last updated 7/14/2024

† Populations may not be currently present.

Ecology: The Paddle-tail Newt inhabits low-gradient streams of varying sizes. It breeds in the same habitats and the larvae develop in the water.  The water can be either clear or murky as a result of flooding with a substrate of either sand or small rocks (Zhao et al. 1994 in AmphibianWeb 2012).

The species is fully aquatic. Populations in Hunan Province, China, hibernate from November till April in crevices or under boulders where water is present. The newts hide in shelters during daytime and are active at night. Pachytriton labiatus feeds on earthworms, other aquatic arthropods, and insect larvae. Anti-predator postures include stretching of limbs, lifting the head and tail, and exposing the orange ventral blotches (Zhao et al. 1994 in AmphibiaWeb, 2012; Sparreboom and Wu, 2013). The breeding season typically begins in April and lasts to July. Females lay around 40 single eggs at the lower surface of rocks in streams; sometimes the eggs are clustered to form a patch (Fei et al, 2006 in AmphibiaWeb, 2012; Sparreboom and Wu, 2013).

Means of Introduction: Pet trade. Large numbers of wild-caught animals appear in the pet trade every year. Local inhabitants may sell them as juvenile Giant Chinese Salamanders (Andrias davidianus) (Xu et al. 2002 in AmphibiaWeb, 2012).

Status: A failed introduction.

Impact of Introduction: The impacts of this species are currently unknown, as no studies have been done to determine how it has affected ecosystems in the invaded range. The absence of data does not equate to lack of effects. It does, however, mean that research is required to evaluate effects before conclusions can be made.

Remarks: Paddletail Newts sometimes are confused with the Japanese Fire-bellied Newts (C. pyrrhogaster) and sold as such, but are much larger, more aggressive, and will eat smaller Fire-bellies if given the opportunity (Encyclopedia of Life, 2012c).

References: (click for full references)

AmphibiaWeb: Information on amphibian biology and conservation. 2012. Berkeley, California: AmphibiaWeb. Available from: http://amphibiaweb.org/.

Fei, L., S. Hu, C. Ye, and Y. Huang. 2006. Fauna Sinica, Amphia, Vol. 1 Science Press, Bejing. (in Chinese)

Krysko, K.L. and 12 others. 2011. Verified non-indigenous amphibians and reptiles in Florida from 1863 through 2010: Outlining the invasion process and identifying invasion pathways and stages. Zootaxa 3028:1-64.

Sparreboom, M. and Y. Wu. 2013. Pachytriton labiatus. Salamanders of China Life Desk. Available from: http://salamandersofchina.lifedesks.org/pages/4062. Accessed 3/22/2013.

Xu, J., P.Z. Zou, C.Y. Wen, and J.R. Chen. 2002. Sexual dimorphism and female reproduction of Pachytriton labiatus in the north of Guandong. Jounral of Shaoguan University (Natural Science) 23:1-6. (in Chinese)

Zhao, X.B., L. Zeng, J.D. Zeng, and Y.S. Lei. 1994. The ecological study of Pachytriton labiatus in the north of Guangdong.

Author: Fuller, P.

Revision Date: 8/6/2013

Citation Information:
Fuller, P., 2024, Paramesotriton labiatus (Unterstein, 1930): U.S. Geological Survey, Nonindigenous Aquatic Species Database, Gainesville, FL, https://nas.er.usgs.gov/queries/FactSheet.aspx?speciesID=2862, Revision Date: 8/6/2013, Access Date: 7/15/2024

This information is preliminary or provisional and is subject to revision. It is being provided to meet the need for timely best science. The information has not received final approval by the U.S. Geological Survey (USGS) and is provided on the condition that neither the USGS nor the U.S. Government shall be held liable for any damages resulting from the authorized or unauthorized use of the information.


The data represented on this site vary in accuracy, scale, completeness, extent of coverage and origin. It is the user's responsibility to use these data consistent with their intended purpose and within stated limitations. We highly recommend reviewing metadata files prior to interpreting these data.

Citation information: U.S. Geological Survey. [2024]. Nonindigenous Aquatic Species Database. Gainesville, Florida. Accessed [7/15/2024].

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