Citation: Midtgaard, Rune. RepFocus - A Survey of the Reptiles of the World. (www.repfocus.dk).
Latest update:
November 6th, 2025.
 
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Genus
Pseudalsophis
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Neotropical Elegant Racers
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Neotropische Prachtzornnattern
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Neotropiske Pragtpilsnoge
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2009 |  |
Pseudalsophis Zaher, Grazziotin, Cadle, Murphy, Moura-Leite & Bonatto 2009 (type species: Lygophis elegans Tschudi 1845) |
Contents:
11 species, of which 10 (90.9%) are endemic.
Endemism: 0%  100%
Distribution:
W. South America, Galapagos Islands.
Reported from:
Chile,
Ecuador
(incl.
Galapagos Islands
[Baltra,
Bartholome,
Champion,
Espanola,
Fernandina,
Floreana,
Gardner-near-Espanola,
Gardner-near-Floreana,
Isabela,
North Seymour,
Pinzon,
Rabida,
San Cristóbal,
Santa Cruz,
Santa Fe,
Santiago,
Tortuga]),
Peru.
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Meristic and other data
of the world's snakes.
Compiled by
V. Wallach
Key to abbreviations
Head drawings of the
genus Pseudalsophis.
Compiled by V. Wallach
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Pseudalsophis biserialis
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Floreana Racer, Southern Galapagos Racer, Charles Island Racer, (Eastern Galapagos Racer)
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Floreana-Zornnatter
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Floreana-pilsnog
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1860 | |
Herpetodryas biserialis Günther |
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Orophis biserialis Garman 1892 |
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Dromicus biserialis Heller 1903 |
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Philodryas biserialis Almendáriz 1992 |
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Alsophis biserialis Thomas 1997 |
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Pseudalsophis biserialis Zaher, Grazziotin, Cadle, Murphy, Moura-Leite & Bonatto 2009 |
Remarks:
Previously included dorsalis, eibli and occidentalis.
Distribution:
Galapagos Islands
(Champion,
Floreana,
Gardner-near-Floreana).
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Pseudalsophis darwini
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Tortuga Racer, (Darwin's Racer)
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Tortuga-Zornnatter
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Tortuga-pilsnog
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2018 | |
Pseudalsophis darwini Zaher, Yánez-Muñoz, Rodrigues, Graboski, Machado, Altamirano-Benavides, Bonatto & Grazziotin |
Distribution:
Galapagos Islands
(Fernandina,
Isabela,
Tortuga).
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Pseudalsophis dorsalis
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Santa Cruz Racer, Central Galapagos Racer
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Santa-Cruz-Zornnatter
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Santa Cruz-pilsnog
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1876 | |
Dromicus chamissonis var. dorsalis Steindachner |
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Dromicus dorsalis Mertens 1960 |
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Alsophis dorsalis Almendáriz 1992 |
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Alsophis biserialis dorsalis Thomas 1997 |
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Pseudalsophis dorsalis Zaher, Grazziotin, Cadle, Murphy, Moura-Leite & Bonatto 2009 |
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1876 | |
Dromicus chamissonis habelii Steindachner (Thomas 1997) |
Distribution:
Galapagos Islands
(Baltra,
North Seymour,
Santa Cruz,
Santa Fe).
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Pseudalsophis eibli
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San Cristobal Racer, Eastern Galapagos Racer
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San-Cristobal-Zornnatter
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San Cristobal-pilsnog
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1960 | |
Dromicus biserialis eibli Mertens |
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Philodryas biserialis eibli Swash & Still 2005 |
Remarks:
Previously regarded as a synonym (e.g., Thomas 1997) or a subspecies (e.g., Mertens 1960; Swash & Still 2005) of biserialis.
Regarded herein as a separate species, following Arteaga, Bustamante & Vieira (2024).
Distribution:
Ecuador
(Galapagos Islands:
San Cristobal).
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Pseudalsophis elegans
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South American Elegant Racer, Western South American Neotropical Racer
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Südamerikanische Prachtzornnatter
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Sydamerikansk Pragtpilsnog
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1845 | |
Lygophis elegans Tschudi |
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Dryophylax elegans Cope 1878 |
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Philodryas elegans Boulenger 1896 |
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Chlorosoma elegans Amaral 1929 |
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Alsophis elegans Veloso & Navarro 1988 |
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Pseudalsophis elegans Zaher, Grazziotin, Cadle, Murphy, Moura-Leite & Bonatto 2009 |
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1854 | |
Dryophylax freminvillei Duméril, Bibron & Duméril (Thomas & Ineich 1999) |
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Philodryas freminvillei Jan 1863 |
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1858 | |
Dromicus rufidorsatus Günther |
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Philodryas elegans rufidorsatus Schmidt & Walker 1943 |
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Pseudalsophis elegans rufidorsatus Zaher, Grazziotin, Cadle, Murphy, Moura-Leite & Bonatto 2009 |
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1868 | |
Tachymenis canilatus Cope (Peters & Orejas-Miranda 1970) |
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1876 | |
Lygophis poecilostomus Cope (Peters & Orejas-Miranda 1970) |
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1878 | |
Dryophylax vitellinus Cope (Peters & Orejas-Miranda 1970) |
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1922 | |
Tachymenis surinamensis Dunn (Wallach, Williams & Boundy 2014) |
Other common names:
elegans: Elegant Green Racer
rufidorsatus: Guayaquil Racer
Distribution:
Chile,
Ecuador
(mainland),
Peru.
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Pseudalsophis hephaestus
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Santiago Racer
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Santiago-Zornnatter
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Santiago-pilsnog
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2018 | |
Pseudalsophis hephaestus Zaher, Yánez-Muñoz, Rodrigues, Graboski, Machado, Altamirano-Benavides, Bonatto & Grazziotin |
Distribution:
Galapagos Islands
(Rabida,
Santiago).
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Pseudalsophis hoodensis
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Española Racer
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Española-Zornnatter
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Española-pilsnog
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1912 | |
Dromicus hoodensis Van Denburgh |
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Dromicus biserialis hoodensis Mertens 1960 |
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Philodryas hoodensis Thomas 1997 |
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Philodryas biserialis hoodensis Swash & Still 2005 |
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Pseudalsophis hoodensis Zaher, Grazziotin, Cadle, Murphy, Moura-Leite & Bonatto 2009 |
Distribution:
Galapagos Islands
(Espanola,
Gardner-near-Espanola).
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Pseudalsophis occidentalis
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Western Galapagos Racer, Narborough Island Racer, (Fernandina Racer)
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Westliche Galapagos-Zornnatter
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Vestlig Galapagos-pilsnog
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1912 | |
Dromicus occidentalis occidentalis Van Denburgh |
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Dromicus dorsalis occidentalis Mertens 1960 |
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Alsophis biserialis occidentalis Thomas 1977 |
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Alsophis dorsalis occidentalis Swash & Still 2005 |
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Pseudalsophis occidentalis Zaher, Grazziotin, Cadle, Murphy, Moura-Leite & Bonatto 2009 |
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1912 | |
Dromicus occidentalis helleri Van Denburgh (Thomas 1997) |
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Dromicus dorsalis helleri Mertens 1960 |
Other common names:
helleri: Isabela Racer, (Heller's Galapagos Racer)
Distribution:
Galapagos Islands
(Fernandina,
Isabela,
Tortuga).
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Pseudalsophis slevini
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Pinzón Racer, Banded Galapagos Racer, (Slevin's Racer, Slevin's Snake)
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Pinzón-Zornnatter
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Pinzón-pilsnog
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1912 | |
Dromicus slevini Van Denburgh |
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Alsophis slevini Maglio 1970 |
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Antillophis slevini Thomas 1997 |
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Pseudalsophis slevini Zaher, Grazziotin, Cadle, Murphy, Moura-Leite & Bonatto 2009 |
Distribution:
Galapagos Islands
(Pinzon).
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Pseudalsophis steindachneri
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Striped Galapagos Racer, Galapagos Painted Racer, (Steindachner's Racer, Steindachner's Snake)
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Gestreifte Galapagos-Zornnatter
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Stribet Galapagos-pilsnog
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1912 | |
Dromicus steindachneri Van Denburgh |
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Dromicus slevini steindachneri Mertens 1960 |
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Antillophis steindachneri Thomas 1997 |
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Alsophis slevini steindachneri Swash & Still 2005 |
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Pseudalsophis steindachneri Zaher, Grazziotin, Cadle, Murphy, Moura-Leite & Bonatto 2009 |
Distribution:
Galapagos Islands
(Baltra,
Santa Cruz).
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Pseudalsophis thomasi
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Rábida Racer, (Thomas' Racer)
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Rábida-Zornnatter
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Rábida-pilsnog
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2018 | |
Pseudalsophis thomasi Zaher, Yánez-Muñoz, Rodrigues, Graboski, Machado, Altamirano-Benavides, Bonatto & Grazziotin |
Distribution:
Galapagos Islands
(Bartholome,
Rabida,
Santiago).
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