Eirenis

Eirenis is a genus of Old World snakes in the family Colubridae.

Species
The genus Eirenis contains the following 23 described species:
 * Eirenis africanus (Boulenger, 1914) - African dwarf snake
 * Eirenis aurolineatus (Venzmer, 1919)
 * Eirenis barani J.F. Schmidtler, 1988 – Baran's dwarf racer
 * Eirenis collaris (Ménétries, 1832) – collared dwarf racer
 * Eirenis coronella (Schlegel, 1837) – crowned dwarf racer
 * Eirenis coronelloides (Jan, 1862) - Sinai dwarf racer
 * Eirenis decemlineatus (A.M.C. Duméril, Bibron & A.H.A. Duméril, 1854) - narrow-striped dwarf snake
 * Eirenis eiselti J.J. Schmidtler & J.F. Schmidtler, 1978 – Eiselt's dwarf racer
 * Eirenis hakkariensis J.F. Schmidtler & Eiselt, 1991
 * Eirenis kermanensis Rajabizadeh et al., 2012
 * Eirenis levantinus J.F. Schmidtler, 1993
 * Eirenis lineomaculatus K.P. Schmidt, 1939
 * Eirenis medus (Chernov, 1940)
 * Eirenis modestus (Martin, 1838) – Asia Minor dwarf racer
 * Eirenis nigrofasciatus Nikolsky, 1907
 * Eirenis occidentalis Rajabizadeh et al., 2015
 * Eirenis persicus (Anderson, 1872) - dark-headed dwarf racer
 * Eirenis punctatolineatus (Boettger, 1892) – dotted dwarf racer
 * Eirenis rafsanjanicus Akbarpour, N. Rastegar-Pouyani, Fathinia & E. Rastegar-Pouyani, 2020
 * Eirenis rechingeri Eiselt, 1971
 * Eirenis rothii Jan, 1863 – Roth's dwarf racer
 * Eirenis thospitis J.F. Schmidtler & Lanza, 1990
 * Eirenis yassujicus Fathinia, E. Rastegar-Pouyani & Shafaeipour, 2019

Nota bene: A binomial authority in parentheses indicates that the species was originally described in a genus other than Eirenis.

Distribution
Some of the species within this genus have a narrow geographic distribution; for example, Eirenis mcmahoni occurs only within a single ecoregion along the Afghanistan/Pakistan border, which region is known as the Registan-North Pakistan sandy desert.