Lycodon walli (STEJNEGER, 1907)

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Higher Taxa	Colubridae, Colubrinae, Colubroidea, Caenophidia, Alethinophidia, Serpentes, Squamata (snakes)
Subspecies
Common Names	E: Walls’ Red-banded Snake G: Walls Grosszahnnatter
Synonym	Dinodon rufozonatum walli STEJNEGER 1907: 364 Dinodon rufozonatum walli — MAKI 1931 Dinodon rufozonatus — GORIS & MAEDA 2004: 222 Lycodon walli — NGUYEN et al. 2025
Distribution	Japan (Ryukyu islands). Type locality: Ishigaki Shima, Yaeyama group.
Reproduction	oviparous
Types	Holotype: USNM 34007
Diagnosis	Diagnosis: Large-sized species, maximum snout-vent length up to 922 mm; loreal not contacting the eye; dorsal scale rows 17 (19)–17–15; all smooth at midbody; 164–198 ventrals; 71–90 subcaudals, paired; cloacal plate undivided; 8 supralabials with 3–5 touching the eye; 1 preocular, 2 postoculars; temporals 2+3; dorsum chocolate colour with dorsal crossbands grey-brown or dirty cream, wide, separate ground colour into ellipse-shaped patches, 39–51 crossbands on body and tail on tail; head grey-brown the plates conspicuously margined with pale brown; venter cream or pale yellow, no banded (based on Stejneger 1907; Maki 1931; Takara 1962; this study). (Nguyen et al. 2025) Unfortunately we had to temporarily remove additional information as this was scraped by multiple AI companies who sell that data to their customers. These details, e.g. detailed descriptions or comparisons (about 5783 characters) are available for collaborators and contributors. Please contact us for details.
Comment	Subspecies: Dinodon rufozonatum meridionale has been elevated to species status. D. r. walli has fewer ventrals (178-195) and fewer dark cross-bars on body and tail (22-32 on body, 15-20 on tail); a pale inverted V on the nape, underside more or less mottles with brown (STEJNEGER 1907). Behavior: nocturnal.
References	Goris, R.C. & Maeda, N. 2004. Guide to the Amphibians and Reptiles of Japan. Krieger, Malabar, 285 pp. Maki, M. 1931. Monograph of the Snakes of Japan. Dai-ichi Shobo, Tokyo. (1), 7, 240 pages (expanded edition 1933) - get paper here Nguyen TV, Poyarkov NA, Vogel G 2025. Taxonomic reassessment of the Lycodon rufozonatus species complex (Serpentes, Colubridae), with re-evaluation of Dinodon rufozonatum walli, and description of a new species from north-central Vietnam. ZooKeys 1251: 293-322 - get paper here Stejneger, LEONHARD H. 1907. Herpetology of Japan and adjacent territory. Bull. US Natl. Mus. 58: xx, 1-577 - get paper here
External links	IUCN Red List Google images

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