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Philodryas baroni

Philodryas baroni, Photo: Michael Lahanas

Superregnum: Eukaryota
Regnum: Animalia
Subregnum: Eumetazoa
Cladus: Bilateria
Cladus: Nephrozoa
Superphylum: Deuterostomia
Phylum: Chordata
Subphylum: Vertebrata
Infraphylum: Gnathostomata
Superclassis: Tetrapoda
Cladus: Reptiliomorpha
Cladus: Amniota
Classis: Reptilia
Cladus: Eureptilia
Cladus: Romeriida
Subclassis: Diapsida
Cladus: Sauria
Infraclassis: Lepidosauromorpha
Superordo: Lepidosauria
Ordo: Squamata
Subordo: Serpentes
Infraordo: Caenophidia
Superfamilia: Colubroidea

Familia: Dipsadidae
Subfamilia: Xenodontinae
Genus: Philodryas
Species: Philodryas baroni

Philodryas baroni Berg, 1895

Berg, C. 1895. Dos reptiles nuevos descritos. Anales del Museo Nacional de Buenos Aires, 4:189-194.
Philodryas baroni at the New Reptile Database. Accessed on 16 april 2015.

Vernacular names

Philodryas baroni, common name Baron's green racer,[2] is a species of venomous snake in the family Colubridae. The species is endemic to South America.


The Latin specific name, baroni, honors Manuel Barón Morlat, who collected the first specimens.[3][4]

P. baroni can reach a total length (including tail) of about 150–180 centimetres (59–71 in).[5] The males are smaller than the females. The length of the tail is about 30% of the total body length. This species is the longest known in the genus Philodryas. The head is small and elongated, with an extension of the rostral scale, forming a small flexible nasal protuberance more developed in males. The coloration of the body is rather variable.[6] Usually it is green, but there are found specimens tending to blue or brown. The pattern can be uniform or with black longitudinal stripes on the back and on the sides, on the anterior third of the body. The ventral area under the black lateral lines can be white or yellowish-white, sometimes with shades of green or blue.[6]

P. baroni is a strictly arboreal snake, with an intense activity during the day. It is generally non-aggressive.[5] If it is frightened, it emits a foul-smelling substance from the cloaca.[5]

P. baroni feeds on small rodents, small lizards, birds, and amphibians.[citation needed]

P. baroni is opisthoglyphous, i.e., equipped with rear fangs.[5][6] It is venomous and should be treated with caution. A recent characterization of the venom of this species has shown that it has proteolytic activity, being able to inhibit platelet aggregation induced by collagen and thrombin formation. An intradermal injection in mice results in hemorrhage. When injected by the intramuscular route, it induces local effects such as hemorrhage, myonecrosis, edema and leukocyte infiltration, with a minimum hemorrhagic dose of 13.9 μg. Therefore, P. baroni must be considered dangerous to the human.[7]
Geographic range

P. baroni can be found in Argentina, Bolivia, and Paraguay.[2]

P. baroni lives in forests and savannah woodlands.[5]

P. baroni is oviparous.[2]

Cacciali, P.; Giraudo, A.; Scott, N.; Scrocchi, G.; Arzamendia, V. (2017). "Philodryas baroni". IUCN Red List of Threatened Species. 2017: e.T15181766A15181770. doi:10.2305/IUCN.UK.2017-2.RLTS.T15181766A15181770.en. Retrieved 19 November 2021.
"Philodryas baroni ". The Reptile Database.
Beolens B, Watkins M, Grayson M (2011). The Eponym Dictionary of Reptiles. Baltimore: Johns Hopkins University Press. xiii + 296 pp. ISBN 978-1-4214-0135-5. (Philodryas baroni, p. 17).
Berg C (1895). "Dos reptiles neuvos descritos ". Anales del Museo Nacional de Buenos Aires 4: 189-194. (Philodryas baroni, new species, pp. 189-191, Figure 1). (in Latin and Spanish).
"Philodryas baroni ".
Philodryas Archived 2013-12-02 at the Wayback Machine.

Sánchez MN, Timoniuk A, Maruñak S, Teibler P, Acosta O, Peichoto ME (January 2014). "Biochemical and biological analysis of Philodryas baroni (Baron's green racer; Dipsadidae) venom: relevance to the findings of human risk assessment". Human & Experimental Toxicology. 33 (1): 22–31. doi:10.1177/0960327113493302. ISSN 1477-0903. PMID 23800999.

External links

Animal Diversity
"Philodryas baroni". National Center for Biotechnology Information (NCBI).

Further reading

Boulenger GA (1896). Catalogue of the Snakes in the British Museum (Natural History). Volume III., Containing the Colubridæ (Opisthoglyphæ and Proteroglyphæ) ... London: Trustees of the British Museum (Natural History). (Taylor and Francis, printers). xiv + 727 pp. + Plates I-XXV. (Philodryas baroni, p. 136).
Freiberg M (1982). Snakes of South America. Hong Kong: T.F.H. Publications. 189 pp. ISBN 0-87666-912-7. (Philodryas baroni, p. 137 + four photographs on pp. 142–143).


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