Article · Wikipedia archive · Last revised Aug 7, 2026

Phalotris

Phalotris is a genus of snakes in the subfamily Dipsadinae of the family Colubridae. All species of the genus Phalotris are native to South America. The specific name, mertensi, is in honor of German herpetologist Robert Mertens. The specific name, normanscotti, is in honor of Norman Scott, Jr., in recognition of his contribution to the knowledge of the herpetofauna of Paraguay.

Last revised
Aug 7, 2026
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Phalotris
Phalotris matogrossensis
Scientific classification Edit this classification
Kingdom: Animalia
Phylum: Chordata
Class: Reptilia
Order: Squamata
Suborder: Serpentes
Family: Colubridae
Subfamily: Dipsadinae
Genus: Phalotris
Cope, 1862

Phalotris is a genus of snakes in the subfamily Dipsadinae of the family Colubridae. All species of the genus Phalotris are native to South America.1 The specific name, mertensi, is in honor of German herpetologist Robert Mertens.2 The specific name, normanscotti, is in honor of Norman Scott, Jr., in recognition of his contribution to the knowledge of the herpetofauna of Paraguay.3

Venom

The venom of the genus Phalotris was poorly characterized, due to the low amount produced by snakes of the family Colubridae. A more detailed characterization of particularly interesting proteins could only be viable by obtaining recombinant proteins. However, there is a report of an incident of snakebite by a Phalotris, which resulted in headache, local and oral mucosa hemorrhage, edema, and renal failure. Another incident report occurred with a 37-year-old biologist, whose symptoms were immediate local pain, bleeding, and edema. A few hours later, there was headache, systemic hemorrhage, fever, myalgia, and dark urine. A study of the venom of Phalotris mertensi showed a myotoxic action three times greater than Bothrops jararaca.45

Species

The following 19 species are recognized as being valid.1

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

References

References

Further reading

Further reading

  • Cope ED (1862). "Observations upon certain Cyprinoid fish in Pennsylvania; on Elapomorphus, Sympholis, and Coniophanes ". Proceedings of the Academy of Natural Sciences of Philadelphia 13: 522–524. (Phalotris, new genus, p. 524).
  • Cacciali, Pier; Mee, George; Plettenberg Laing, Anthony; Krause, Danilo; Mclaughlin, Chloe; Montgomery, Ryan; Smith, Paul (2020). "Morphological Re-Examination of the Endemic Paraguayan Snake Phalotris nigrilatus Ferrarezzi, 1993 (Serpentes: Colubridae: Elapomorphini), with Notes on Its Ecology and Conservation Status." Current Herpetology 39 (1): 28–37. www.herpco.com.