Erythrolamprus reginae (Linnaeus, 1758)

Ascenso, Alexandre C., Costa, João C. L. & Prudente, Ana L. C., 2019, Taxonomic revision of the Erythrolamprus reginae species group, with description of a new species from Guiana Shield (Serpentes: Xenodontinae), Zootaxa 4586 (1), pp. 65-97 : 87

Key to species of Erythrolamprus reginae group

1 Dorsal scales at the midbody in 15 rows........................................................... E. oligolepis

- Dorsal scales at the midbody in 17 rows.................................................................... 2

2 Venter cream without spots or dots........................................................... E. rochai sp. nov.

- Venter cream white with black squared spots................................................................ 3

3 Dorsum of head, body and tail yellowish or reddish-cream with distal half of scales black............................ 4

- Dorsum of head, body and tail variable but not as the above.................................................... 5

4 Dorsum of head, body and tail reddish-cream, usually colored in yellowish or bluish-cream, with distal half of scales black, dorsal-lateral stripe slightly distinct, and occurring at the Venezuelan Llanos and southwestern Amazon... E. dorsocorallinus

- Dorsum of head, body, and tail yellowish-cream with distal half of scales black, dorsal-lateral stripe absent, and occurring at the Venezuelan Cordillera de La Costa.............................................................. E. zweifeli

5 Lateral spots on the posterior region of body merging in a conspicuous black dorsal-lateral stripe that extends to the end into the tail; tail ventral surface without black spots....................................................... E. reginae

- Lateral spots on the posterior region of body absent, black dorsal-lateral stripe slightly distinct, but extending to the end of the tail; tail venter with black dots, more concentrated in first subcaudals................................. E. macrosomus