📸 PhotoPhoto: Kim, Hyun-tae · CC BY 4.0 · Wikimedia Commons Source
Northeast China Rough-skinned Frog
Glandirana emeljanovi (Northeast China Rough-skinned Frog · Northeast China Rough-skinned Frog)
💡 Everyday Comparisons for Size, Mass & Speed
- 💡 The female average length of about 5 cm is slightly longer than two Korean 100-won coins (24 mm in diameter) lined up side by side (48 mm) (Comparison).
- 💡 A study in Yangpyeong-gun, Gyeonggi-do captured 97 adults and 64 juveniles to measure their size and age, showing how these frogs grow and how many years they live in Korea (Korean Journal of Herpetology).
Reference standards: coach bus ~12 m, mid-size car ~4.9 m, compact car ~1 t, basketball hoop 3.05 m, credit card 8.56 cm.
📖 1. Overview
The Northeast China Rough-skinned Frog is a small frog whose populations have been studied in Korea, and in 2025 it was also confirmed for the first time in southern Primorsky Krai, Russia. It is listed as Glandirana rugosa on the National List of Species of Korea, but is recorded here as G. emeljanovi.
🦴 2. Anatomy & Morphology
In the Yangpyeong population in Gyeonggi-do, average snout-to-vent length was 41.3 mm in males and 50.7 mm in females, making females larger. Sex and maturity were determined by traits such as nuptial pads and vocal sacs in males and ovulated eggs in females.
🔍 3. Ecology & Behavior
Skeletochronology showed males were 3–5 years old and females 3–8 years old, with no major difference in age structure between sexes. Around twenty juveniles newly confirmed in Russia were found under stones on a riverbank and averaged 28.6 mm in size.
🇰🇷 4. Connection to Korea
The age and body size of a population in Yangpyeong-gun, Gyeonggi-do (28 males and 69 females measured) were surveyed in the 2009 issue of the Korean Journal of Herpetology. It is listed as 'Om-gaeguri' (Korean name) on the National List of Species of Korea.
📚 Sources & References
- • IUCN Red List LC (2020) — https://www.iucnredlist.org/species/58591/63878188
- • IUCN Red List category LC — latest assessment at iucnredlist.org
- • catalogueoflife.org — 3G589
- • iucnredlist.org — 63878188
- • 국가생물종목록(국립생물자원관) ktsn 120000164709 — https://species.nibr.go.kr/home/mainHome.do?cont_link=009&subMenu=009002&contCd=009002&ktsn=120000164709
- • wikidata.org — Q3024363
- • commons.wikimedia.org — File:Glandirana emeljanovi.jpg
- • earticle.net — A188079
- • biosoil.ru — 22651
- • species.nibr.go.kr — mainHome.do
- • bok.or.kr — contents.do
- • Silhouette: PhyloPic — Beth Reinke · CC0 1.0 (Related taxon silhouette — Rana sierrae)
Recorded dimensions are widely cited representative estimates from public literature and may vary by study or specimen.