Painted coral snake
Cobra Coral Pintada
These snakes reach a maximum size of about 99 cm, the average size is between 60 to 85 cm. There is a black cap that covers the snout and and most of the parietals. This cap is separated from the nuchal black nuchal band by a narrow yellow or white band. The chin is mostly yellow or white, except for part of the mental and the first infralabials, which are black. In some cases, small black spots may be present on other scales of the chin. The black nuchal band is 3 to 4 dorsals wide. The black body bands are 3 to 4 dorsals wide and the red bands are 9 to 12 dorsals wide. The red scales have black tips except for those of the first dorsal row. The yellow bands are 1 dorsal wide and also have black tips. The ventral red bands are spot and smudge-less (Roze, 1996)
There are 195 to 224 ventral scales, and 27 to 47 subcaudal scales (Roze,1996).
Amphisbaenid lizards, caecilians and limbless amphibians (Roze, 1996).
Central and southern Brazil, south of the Amazon basin to Uruguay and northern Argentina.
Littoral and subtropical decidious forests (Roze, 1996).
Lectotype: AMNH 3911, designated by Roze, 1966, Copeia (2):370.
Type-locality: Brazil; restricted to Rio de Janeiro, Cabo Frio, Brazil, by Roze, 1967, Am. Mus. Novit. (2287):13, who based this locality on information supplied by Wied, 1820, Nova Acta Acad. Caesar. Leop. Carol., Halle 10:105-110[108], for several specimens sent to Merrem.
Micrurus corallinus is a species of highly venomous elapid snake native to South America (Brazil, Argentina and Paraguay).[1][2][3] There are no recognized subspecies.[3]
Common names of this species include painted coral snake, cobra coral pintada,[3] mboi-chumbe, vibora de coral, boicora, bocora, coral-verdadeira, ibiboboca, and mboi-yvyvovo.[2]
The painted coral snake is a medium-sized tri-colored snake which can grow to 98 cm (39 in), but most are closer to 65–85 cm (26–33 in).[2] It is a snake with nocturnal habits found on the coastlines, through leaves, on top of logs and stones, its diet is based on lizards, other snakes (including coluibrids), amphisbenids and gymnophils.[4][5]
The head color is black with a white or yellow back band, which narrows strongly in a dorsal shape, the bodies have wide red rings that are separated by a series of 15–27 (usually 17–21) by wide and narrow black rings and with white borders. The tail has 3 to 8 alternating black and yellow rings.[2] They have a slim body, with a moderately short tail in the case of males and very short in the case of females, the head is round, small and a little distant from the neck. The eyes are slightly small with round pupils. It has smooth and shiny dorsal scales, without apical punctuation. The supra-anal keels are absent in males.[6]
Its range includes South America in Brazil (Rio Grande do Sul, Rio Grande do Norte, Bahia, Santa Catarina, Espírito Santo), northeastern Argentina (Misiones), and Paraguay. It is mainly found in the Amazon basin in tropical deciduous and evergreen forest at elevations ranging from sea level to 500 m.[2]
Reproduction is oviparous, laying up to 15 eggs.[2]
It is not aggressive towards humans, the group of coral snakes represents only 1% of accidents in Central and South America, however the venom produced by them is highly potent, with neurotoxic action, causing neuromuscular block, which results in death from respiratory arrest, resulting from paralysis of the respiratory muscles. The LD50 for a 5–27 grams mouse is 0,007 mg.[7][8] 0.2 mg/kg (intramuscular injection), 0.09 mg/kg (intraperitoneal) and 0.04 mg/kg (intravenous).
The venom of this species is compound of the three-finger toxin families, Phospholipase A2, L-amino acid oxidase, True venom lectin, SVMP (snake venom metalloproteinase), Kunitz-type inhibitor (Venom Kunitz-type), NGF (NGF -beta) and Waprin.[9] The amount of venom extracted from this species is 3 mg.[10] The venom of this species has presynaptic activity.[11] M. corallinus has alpha-neurotoxins with pre-synaptic activity that causes a high and spontaneous release of acetylcholine associated with the postsynaptic block of the electrical transmission between the nerve and the muscle.[12]
Micrurus corallinus is a species of highly venomous elapid snake native to South America (Brazil, Argentina and Paraguay). There are no recognized subspecies.
