Don't want to see ads? Sign up...




Pseudotomodon trigonatus

False Tomodon Snake


Pseudotomodon trigonatus

(Leybold, 1873)
Culebra de Monte Ocelada

Family: Colubridae
Order: Squamata
Class: Reptilia
Phylum / Division: Chordata
Kingdom: Animalia

 Request change



Filters




Description


The false tomodon snake (Tachymenis trigonatus) is a species of venomous snake in the subfamily Dipsadinae of the family Colubridae. The species is endemic to Argentina.

Taxonomy: Tachymenis trigonatus is part of the 36 species of the tribe Tachymenini.

Geographic distribution: Tachymenis trigonatus is found in the western and southern regions of the Monte Desert in western Argentina.

Habitat: The preferred natural habitat of Tachymenis trigonatus is shrubland.

Characteristics: The false tomodon snake is characterized by its coloration and number of scales. As part of the genus Tachymenis, it has morphological characters of maxillary teeth with grooved fangs, and a vertical pupil. The false tomodon snake has eight or fewer maxillary teeth. The body is marked dorsally by a distinguishing yellowish vertebral line. The dorsal scales are arranged in 19 rows at midbody. Adults have a total length (tail included) of about .

Behavior: Tachymenis trigonatus is terrestrial.

Reproduction: Tachymenis trigonatus is ovoviviparous.

Source: Wikipedia, article Pseudotomodon trigonatus. Content adapted from Wikipedia, available under the CC BY-SA 4.0 license. Accessed on 16/07/2026.





Geographic distribution


Loading map...




Species photographs

Count: 25




 View all photographs of the species




 Add a photography of this species






Species vocalizations

Last vocalizations published



 Add an audio of this species





Species videos

Count: 1




 Add a film of this species





Species reports



 Detail of places sorted by number of records






Species records

Count: 23



Page 1 of 3
Record IDDateExact timeCountryProvince / departmentPlaceFilmedPhotographedRecorded vocalObservedHeardWounded or deadNumber of individualsUser or BibliographyDetail
225783528/02/2025ArgentinaMendozaReserva Natural VillavicencioEmilio Martin Perez
201771202/04/2024ArgentinaChubutLobería Puerto Pirámides, Área Natural Protegida Península Valdés1Nicolas Olejnik
237005223/12/2022ArgentinaMendozaLagunita temporal de la canteraPablo Moreno
218018422/11/2021ArgentinaNeuquénLos Bastos, Departamento ConfluenciaTiziano Luka Pesci Rubilar
152328915/11/2021ArgentinaLa PampaParque Nacional Lihué Calel1Jorge La Grotteria
152328815/11/2021ArgentinaLa PampaParque Nacional Lihué Calel1María Alejandra Sosa
146147704/02/2021ArgentinaChubutRuta 7 km 4, Rawson, TrelewMicaela Garay
135934604/01/2021ArgentinaChubutÁrea Natural Protegida Península ValdésDiego Oscar
114235729/11/2019ArgentinaSan LuisÁrea Natural Protegida Quebracho de la LeguaSamuel Ernesto Olivieri Bornand
114133626/11/2019ArgentinaChubutPlaya El Sombrerito, RawsonZulima América Schupbach
Page 1 of 3

 Add a record of this species

📖
Recommended citation
Please use the following reference when citing this species account.
EcoRegistros. 2026. False Tomodon Snake (Pseudotomodon trigonatus) – Species account. Accessed from www.ecoregistros.org on 14/09/2026.