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Tribolonotus choiseulensis RITTMEYER & AUSTIN, 2017

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Higher TaxaScincidae, Egerniinae (Tiliquini), Scincoidea, Sauria, Squamata (lizards)
Subspecies 
Common Names 
SynonymTribolonotus choiseulensis RITTMEYER & AUSTIN 2017 
DistributionSolomon Archipelago (Choiseul Island)

Type locality: Taro Island, Choiseul Bay, near Choiseul Island, Choiseul Province, Solomon Islands, 6.7100°S, 156.3964°E, WGS84  
Reproduction 
TypesHolotype: AMS R127275, collected by G. Mengden, 20 November 1987. Paratypes. AMS R126006–9, collected by Mike McCoy, Sumbisumbi, Choiseul Island, Choiseul Province, Solomon Islands, 6.6469°S, 156.388°E, WGS84, 23 February 1987; AMS R127269-R127271, collected by G. Mengden, Taro Island, Choiseul Bay, near Choiseul Island, Choiseul Province, Solomon Islands, 6.7100°S, 156.3964°E, WGS84, 19 November 1987; AMS R127272–4, R127276–80, collected by G. Mengden, Taro Island, Choiseul Bay, near Choiseul Island, Choiseul Province, Solomon Islands, 6.7100°S, 156.3964°E, WGS84, 20 November 1987; BPBM 12771–2, collected by Mike McCoy, Poroporo, Choiseul Island, Choiseul Province, Solomon Islands, 6.655°S, 156.399°E, WGS84, 21 February 1987; BPBM 12807–12, collected by Mike McCoy, Sumbisumbi, Choiseul Island, Choiseul Province, Solomon Islands, 6.6469°S, 156.388°E, WGS84, 23 February 1987. 
DiagnosisDiagnosis: A small (maximum SVL 47.8 mm) Tribolonotus diagnosable from congeners by the following combination of characters: 1) two longitudinal rows of 22–23 enlarged vertebral scales, beginning at the posterior nuchal region; 2) 42–47 ventral scale rows from mental to vent; 3) two primary temporal scales; 4) an elongate first supralabial scale, and no contact between the nasal and second supralabial scales; 5) 11–13 finger III lamellae, 20– 24 toe IV lamellae; and 6) limbs moderate in length (ForeL/SVL = 0.294–0.341; HindL/SVL = 0.498–0.532). Lateral and dorsolateral scales granular, but several longitudinal rows of spinose scales, approximately one for every enlarged vertebral scale. Tail relatively long, up to approximately 180% of SVL. Head rugose, with up to five strong keels per scale; triangular from dorsal aspect and distinct from neck. Head width variable (HW/SVL = 0.164–0.218), but broader and larger in males than females (Male HW/SVL = 0.186–0.218, mean = 0.197 versus 0.164–0.187, mean = 0.178 in females; male HL/SVL = 0.261–0.300, mean = 0.276 versus 0.242–0.273, mean = 0.257 in females; Table 2, Fig. 2). Two primary temporal scales, five supralabial scales, and five or six infralabial scales. A single palmar pore occasionally present at the base of finger IV. Plantar pores variably present; when present, in rows of up to six at the base of toe IV, extending back towards the insertion of toe V, and two at the base of toe III, paralleling the other row. One pair of abdominal glands present at the posterior of the abdomen, slightly anterior to the insertion of the hind limbs. Dorsal color brown with several pairs of indistinct, pale, yellowish tan paravertebral spots. Ventral coloration pale yellowish tan. 
Comment 
EtymologyNamed after the type locality on Choiseul Island, Solomon Islands. 
References
  • RITTMEYER, ERIC N.; CHRISTOPHER C. AUSTIN 2017. Two new species of Crocodile Skinks (Squamata: Scincidae: Tribolonotus) from the Solomon Archipelago. Zootaxa 4268 (1): 071-087 - get paper here
 
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