Varanus auffenbergi
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  REPTILIA: SQUAMATA: VARANIDAE: Varanus

Varanus auffenbergi Sprackland 1999

Peacock monitor / blue Timor monitor

 

Right: holotype in life. Photos & text by Dr. Robert Sprackland.

 

Range: Rotti (Roti) Island, west of Timor, eastern Indonesia.

Left: Adult Varanus auffenbergi paratype, photographed in life. The turquoise and orange markings readily serve to separate this species from the very similar Varanus timorensis.

 

Diagnosis: Similar to Varanus timorensis from which it differs in having pale bluish-gray (vs. cream or yellowish) dorsal rosette markings, larger and better defined rosettes than in V. timorensis, and unmarked (vs. spotted) belly, a pale (vs. dark) face below the canthus rostralis, bright lemon yellow markings on the limbs with fewer, bright orange spots, upper surface of the head dark orange (vs. black), and the body and tail have a black (vs. chocolate brown) background color. Grows to a smaller total length than does Varanus timorensis.

Description: A small monitor with a maximum SVL of 216 mm. Snout long, not pointed, and depressed at the tip anterior to the nostrils. The nostrils are small and round, located midway between snout tip and anterior rim of orbit. There are 7 scales between the nostrils, and three rows of scales beneath the nostrils. The canthus rostralis is rounded and indistinct. Snout length (tip to anterior rim of orbit) is 14-20 mm. There are 25 supralabial scales. Supraocular scales are rounded, smaller than interocular scales. Scales on upper surface of head small, round or hexagonal, and smooth. Overall texture of top of head pebbled. Forty rows of scales go from rictus to rictus (from last supralabial over skull to opposite last supralabial). Head width of holotype, immediately posterior to the eyes is 15 mm; length (from tip to top of ear opening) 33 mm. Gular scales are small and oblong, without keels. There are 15 rows of postocular scales (from posterior rim of eye to top of ear opening). Teeth narrow, slightly recurved, and feebly serrated posteriorly.

Nuchal scales oval, closely set, and smooth, each with a large central pore. Nuchals are smaller than dorsals. Dorsal scales are oblong and bear a feeble keel. There are 109 scales at midbody. Ventral scales smooth, in 85 rows.

Forearm shorter than leg. Antebrachial (front forearm) scales larger than other forearm scales, with a gradual progression in size from front to back of arm. Claws moderately straight, slightly recurved only at tip. Palmar surfaces are pale, interspersed with isolated dark scales.

The holotype is a female, determined by internal examination of oviducts. The right post-cloacal region was dissected to examine for presence of copulatory organs, and the everted hemiclitoris was exposed. There are no post-cloacal tufts, nor evidence of preanal pores.

The tail is longer than the body, slender, and sub-triangular in section. Caudal scales are keeled, but not spinose, and there are no subcaudal spines.

 Reproduction: Unknown: presumably lays eggs in earthen mounds.

Taxonomy & Relationships:  The specific name honors Dr. Walter Auffenberg, the major researcher of varanid ecology in the 20th century. His work focused largely on species of Asia, including Indonesia.

 Holotype: AMNH 143812, Roti Island, Indonesia, collected June 1996.

 Literature:

Sprackland, Robert. 1999. A new species of monitor from Indonesia. Reptile Hobbyist, February: