Erythrolamprus pyburni (MARKEZICH & DIXON, 1979)
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Erythrolamprus pyburni
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| Higher Taxa | Colubridae (Dipsadinae), Colubroidea, Caenophidia, Alethinophidia, Serpentes, Squamata (snakes) |
| Subspecies | |
| Common Names | E: Pyburn's Tropical Forest Snake |
| Synonym | Umbrivaga pyburni MARKEZICH & DIXON 1979: 698 Erythrolamprus pyburni — GRAZZIOTIN et al. 2012 Umbrivaga pyburni — WALLACH et al. 2014: 761 |
| Distribution | Colombia (Meta) Type locality: Loma Linda, Dept. de Meta, Colombia. |
| Reproduction | oviparous |
| Types | Holotype: UTA R-3861, adult male. Paratypes (n=7): UTA (5 males, 2 females) |
| Diagnosis | Diagnosis. A new species distinguished from Umbrivaga mertensi and U. pygmaeus by the following combination of characters (values for U. mertensi in parentheses, U. pygmaeus in brackets): ventrals 144-154 (126-131) [122-133]; subcaudals 37-40 (59-60) [29-37); dorsal scale rows 15-15-15 (17-17-15) [17-17-15); maxillary teeth 10-12 (8-9) [9-10); palatine teeth 4-7 (4-7) [1-2]; pterygoid teeth 11-13 (8-11) [7-11]; tail/total length ratios 0.16-0.18 (0.23-0.26) [0.15-0.18]; posterior lateral black stripe beginning from .80-.97 total number of ventrals (.50) [.15-.57]. Description of holotype.-Male, adult; total length 304 mm, tail length 54 mm; dorsal scales in 15-15-15 scale rows, smooth, without pits, except one apical pit on lateral scale rows of the neck; ventrals 150 anal plate divided, subcaudals 40; rostral plate rounded above, more than twice as broad as high and visible from above; internasals wider than long, shorter than prefrontals; prefrontal suture 1.5 times longer than internasal suture; prefrontals in contact, wider than long, each in contact with internasal, nasal, loreal, preocular, supraocular and frontal; frontal 1.4 times longer than wide at anterior end, hexagonal, with posterior tip somewhat rounded; each supraocular narrower anteriorly than posteriorly, the width of middle portion .3 its length and 0.35 width of frontal; parietal 1.3 times longer than wide, suture between parietals equal to maximum parietal width; naris placed somewhat anteriorly on nasal plate, which is weakly grooved below; one loreal per side, quadrangular per side, higher posteriorly than anteriorly; one preocular, 2 postoculars, upper about 2 times as high as lower; temporals 1 + 2; supralabials 7-8 third and fourth entering orbit; infralabials 8-8, one through four contacting first pair of genials, 4th and 5th contacting second pair of genials; posterior genials longer than anterior pair; diameter of eye .5 length of snout, length of snout .33 length of head. Dorsal and lateral snout surfaces and posterior dorsal head gray, anterior and posterior temporals slightly lighter, dark brown postorbital stripe extending to anterior lateral corner of parietal, tip of anterior temporal and bordering the upper edge of the supralabials; wide brown nuchal collar traversing posterior parietal surface, extending laterally and posteriorly to tip of ventrals one and two; diffuse, irregular brown spot in center of each parietal; diffuse brown markings on most of frontal and prefrontal, along internasal sutures; infralabials and chin white with reduced brown edging on last two infralabials and adjacent gulars; dorsum of body light gray with brown middorsal spots anteriorly, and one or two alternating small brown spots laterally; at midbody and posteriorly, middorsal spots reduced in size, constricted or divided, and alternating, occasionally forming reticulations; scales between spots edged with white; lateral spots fused at ventral 124, forming a dark brown stripe on scale row three and part of scale row four, continuing onto tail; on scale rows four and five, a light gray band continues onto the tail; ventral surface white with occasional narrow brown mottling, underside of tail white, without brown mottling. Left maxillary (in situ) with 8 subequal teeth, followed by a long diastema and two large, lanceolate, medially directed teeth; diastemal length about equal to length of three ultimate prediastemal tooth sockets; posterior edge of ultimate prediastemal tooth socket lies anterior to anterior edge of the ectopterygoid process by a distance equal to one half the tooth socket; left pterygoid with 12 teeth, palatine with 5 teeth; right dentary with 13 subequal teeth.” (Markezich & Dixon 1979) Additional details (1850 characters) are available for collaborators and contributors. Please contact us for details. |
| Comment | |
| Etymology | Named after Emeritus Professor Dr. William Frank "Billy" Pyburn (1927-2007), who founded in 1956 the specimen collection at the University of Texas, Arlington, that became the Amphibian and Reptile Diversity Research Center. |
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