Micrurus obscurus (JAN, 1872)
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Micrurus obscurus
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| Higher Taxa | Elapidae, Colubroidea, Caenophidia, Alethinophidia, Serpentes, Squamata (snakes) |
| Subspecies | |
| Common Names | E: Black-neck Amazonian coral snake, Bolivian Coral Snake Portuguese: Chumbeguaçu, Cobra-Coral, Cobra-Coral-de-Pescoço-Amarelo, Coral, Coral-Verdadeira |
| Synonym | Elaps corallinus var obscura JAN & SORDELLI 1872: plate VI Elaps heterozonus PETERS 1881 Elaps heterozonus BOULENGER 1896 Elaps princeps BOULENGER 1905: 456 Micrurus spixii obscura — SCHMIDT & WALKER 1943: 294 Micrurus spixii princeps — SCHMIDT 1953: 175 Micrurus spixii obscurus — SCHMIDT 1955 Micrurus spixii princeps — PETERS & OREJAS-MIRANDA 1970: 218 Micrurus spixii obscurus — PETERS & OREJAS-MIRANDA 1970: 218 Micrurus spixii obscurus — DUELLMAN 1978: 261 Micrurus spixii obscurus — WELCH 1994: 89 Micrurus spixii princeps — WELCH 1994: 89 Micrurus obscurus — HARVEY et al. 2003 Micrurus spixii obscurus — CAMPBELL & LAMAR 2004: 228 Micrurus spixii princeps — CAMPBELL & LAMAR 2004: 228 Micrurus obscurus — RIVAS et al. 2012 Micrurus obscurus — WALLACH et al. 2014: 451 Micrurus obscurus — NOGUEIRA et al. 2019 |
| Distribution | S/E Colombia, NW Brazil (Upper Amazon region), N Bolivia, E Ecuador, E Peru; Type locality: “Lima” (in error); designated to “Iquitos, Peru” by SCHMIDT 1953: 175. princeps: NW/C Bolivia; Type locality: "Province Sara, Department Santa Cruzde la Sierra, Bolivia" |
| Reproduction | oviparous. |
| Types | Holotype: lost, formerly MSNM, destroyed in World War II. Lectotype: BMNH 1946.1.20.44, a male, designated by Roze, 1989:14 [princeps] |
| Diagnosis | Diagnosis: (1) Dorsal pattern of yellow, red, and black triads; (2) hemipenis and tail relatively short; (3) two supralabials entering orbit; (4) mental usually separated from chinshields by medial contact of first pair of infralabials; (5) anal scale usually divided; (6) first triad usually incomplete (if complete, the first black ring is very short and edges the parietals; a "remnant" of this ring is often evident as a row of black scales on the side of the neck): two black rings on neck, the first strongly angled anteriorly along midline; (7) dorsal surface of snout red, parietal region yellow; black band crossing frontal and supraoculars to suprala bials; (8) apices of yellow rings with more black pigment than apices of scales in red rings; (9) yellow rings longest ventrally, some black rings greatly con stricted or interrupted ventrally; (10) mental and some anterior infralabials edged in black, remaining scales of chin mostly immaculate; (11) parietals immaculate yellow or with black blotching; scales of snout moderately blotched; (12) prefrontal contacting the supralabials in about 60% of the specimens; (13) 6-9 body triads (as few as 4 in specimens outside Bolivia, Roze, 1996), 0.67—1 triads on tail; (14) yellow rings longer or only slightly shorter than exterior black rings [HARVEY et al. 2003]. Unfortunately we had to temporarily remove additional information as this was scraped by multiple AI companies who sell that data to their customers. These details, e.g. detailed descriptions or comparisons (about 2602 characters) are available for collaborators and contributors. Please contact us for details. |
| Comment | Subspecies: M. obscurus is considered as a subspecies of M. lemniscatus by some authors. Venomous! Synonymy after HARVEY et al. 2003 who considered spixii and obscurus as separate species. However, Campbell & Lamar 2004 rejected that, considering the differences between the populations as insufficient to be different species. Distribution: TORRES-CARVAJAL et al. 2019 do not list M. obscurus for Ecuador but rather M. spixii, dependent on which authority is adopted. See map in Nogueira et al. 2019. |
| Etymology | Latin obscurus means dark and obscure and probably alludes to the darkened head and the long black nuchal band. When describing this subspecies Jan used a darkened, large adult specimen that apparently gave the impression of an "obscurus" snake. |
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