The Huanren frog (''Rana huanrensis'') is a species of
true frog found in
East Asia
East Asia is the eastern region of Asia, which is defined in both geographical and ethno-cultural terms. The modern states of East Asia include China, Japan, Mongolia, North Korea, South Korea, and Taiwan. China, North Korea, South Korea and ...
. It was originally believed to be endemic to
Huanren County,
Liaoning
Liaoning () is a coastal province in Northeast China that is the smallest, southernmost, and most populous province in the region. With its capital at Shenyang, it is located on the northern shore of the Yellow Sea, and is the northernmost ...
, China, but was later also found in
South Korea
South Korea, officially the Republic of Korea (ROK), is a country in East Asia, constituting the southern part of the Korea, Korean Peninsula and sharing a Korean Demilitarized Zone, land border with North Korea. Its western border is formed ...
; it is presumed to be present in
North Korea
North Korea, officially the Democratic People's Republic of Korea (DPRK), is a country in East Asia. It constitutes the northern half of the Korea, Korean Peninsula and shares borders with China and Russia to the north, at the Yalu River, Y ...
, as well.
It is closely related to the
Dybowski's frog, ''Rana dybowskii'', and specimens collected before 1991 were incorrectly identified as that species. Distinguishing factors include the absence of a
vocal sac
The vocal sac is the flexible membrane of skin possessed by most male frogs and toads. The purpose of the vocal sac is usually as an amplification of their mating or advertisement call. The presence or development of the vocal sac is one way o ...
.
The Huanren frog is found in and around rivers and streams in hilly terrain. The
type locality in Huanren is above sea level, and specimens from Korea have also only been found at altitudes over . Specimens from South Korea have been collected in the provinces of
Gangwon-do,
Gyeongsangbuk-do, and eastern
Gyeonggi-do
Gyeonggi-do (, ) is the most populous province in South Korea. Its name, ''Gyeonggi'', means "京 (the capital) and 畿 (the surrounding area)". Thus, ''Gyeonggi-do'' can be translated as "Seoul and the surrounding areas of Seoul". Seoul, the na ...
. Egg clutches, which are small and clustered, are deposited on submerged rocks in the streams which this species favors.
References
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{{Taxonbar, from=Q3418728
Rana (genus)
Amphibians of China
Amphibians of Korea
Vertebrates of East Asia
Amphibians described in 1991