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Nannoscincus humectus BAUER & SADLIER, 2000

IUCN Red List - Nannoscincus humectus - Endangered, EN

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Higher TaxaScincidae, Eugongylinae (Eugongylini), Scincoidea, Sauria, Squamata (lizards)
Common Names 
SynonymNannoscincus humectus BAUER & SADLIER 2000: 245
Nannoscincus humectus — SADLIER, BAUER & WHITAKER, 2002
Nannoscincus humectus — SADLIER et al. 2014 
DistributionNew Caledonia

Type locality: Forêt Plate (600-700 m elevation), 21° 07’ S, 165° 07’ E  
Reproductionoviparous (not imputed, fide Zimin et al. 2022) 
TypesHolotype: MNHN-RA 1997.3797 (formerly AMS R 149489) 
DiagnosisDiagnosis: Nannoscincus humectus can be distinguished from all other members of the genus by the following combination of characters: frontoparietals fused; loreal single; left oviduct lost in females; lower eyelid with a semi-translucent window; ear opening minute; body scales smooth; adult dorsal colour distinctly lighter than lateral; ear opening positioned 3 scales posterior to lower secondary temporal; presacral vertebrae 30-32; phalangeal formula for pes (Sadlier et al. 2002: 246).

DESCRIPTION. Based on 17 specimens in the AMS (16 adults and one subadult). Measurements are given for adults only, and scalation and osteology for all specimens unless otherwise stated.
Measurements: maximum SVL 36 mm; distance from axilla to groin 59.4-66.7% of SVL ( = 62.4); distance from forelimb to snout 30.3-35.3% of SVL «)6. = 32.8); hindlimb length 18.2-22.6% of SVL ( =20.9, n =15); tail length approximately 80% of SVL (estimated from 5 individuals with most complete tails).
Scalation: prefrontals very small and widely separated (91%), rarely absent; supraciliaries 7 (94%), rarely 8 or 6; ear opening positioned 3 scales posterior to lower secondary temporal; body scales smooth; midbody scale rows 20-24 ( = 21.8, sd. = 0.86); paravertebral scales 51-56 ( = 53.4, sd. = 1.42); scales on top of fourth finger 4-5 ( = 4.8, sd. =0.30); lamellae beneath fourth finger 4-6 ( = 4.8, sd. =0.67, n =16); scales on top of fourth toe 6-7 ( =6.9, sd. = 0.12); lamellae beneath fourth toe 15-19 ( = 17.0, sd. = 1.12).
Osteology: presacral vertebrae 30-32 «)0.= 31.1, sd. = 0.57, n = 16); postsacral vertebrae 25 on individual with most complete tail; formula for manus and pes and respectively.
Colouration: dorsal colour light to mid brown, with or without dark flecks that are either irregularly distributed or aligned along vertebral axis to form rough longitudinal lines; nape usually with a pale blotch with dark markings posteriorly. Lateral surface darker than dorsal, unmarked. Dorsal and lateral surfaces defined by a dark brown to black (darker than lateral colour) dorsolateral stripe, pale-edged above. Dark dorsolateral stripe extending from back of eye (inflected over tympanic region) to level of hindlimbs, breaking up and becoming poorly defined along tail. Head slightly darker at sides than adjacent areas of body, dark coloration extending around lower edge of rostral scale and inflecting upwards to form a dark midrostral streak in boldly marked individuals, subocular labials with pale markings. Ventral surface pale with scattered brown markings at ventrolateral edge and regular brown markings to throat region, in life with a yellow flush in some individuals (Sadlier et al. 2002: 246). 
CommentThe original description was supposed to appear as SADLIER, BAUER & WHITAKER, 2000. However, BAUER & SADLIER’s monograph (2000) was published earlier and therefore has to be considered as original description.

Distribution: see map in SADLIER et al. 2014: 54. 
EtymologyNamed after LAtin “humectus”, for moist, alluding to the habitat. 
  • Bauer, A. M. & SADLIER, R. A. 2000. The herpetofauna of New Caledonia. Contributions to Herpetology, 17; Society for Study Amphibians and Reptiles, Ithaca, New York.
  • Sadlier, R. A., A. M. BAUER & A. H. WHITAKER 2002. The scincid lizard genus Nannoscincus from New Caledonia in Southwest Pacific: a review of the morphology and distribution of species in the Nannoscincus mariei species group, including the description of three new species from Province Nord. Zoologica Neocaledonica 5. Systématic et endemisme en Nouvellee-Calédonie. pp 233-255. J. Naut & P. Grandcolas (Eds). Memoires du Muséum national d'Histoire naturelle, Vol. 187 , Paris
  • SADLIER, Ross A.; Aaron M. BAUER, Perry L. WOOD Jr., Sarah A. SMITH, Anthony H. WHITAKER & Todd JACKMAN 2014. Cryptic speciation in the New Caledonian lizard genus Nannoscincus (Reptilia: Scincidae) including the description of a new species and recognition of Nannoscincus fuscus Gunther. Memoires du Museum National d'Histoire Naturelle, 206: 45-68.
  • Zimin, A., Zimin, S. V., Shine, R., Avila, L., Bauer, A., Böhm, M., Brown, R., Barki, G., de Oliveira Caetano, G. H., Castro Herrera, F., Chapple, D. G., Chirio, L., Colli, G. R., Doan, T. M., Glaw, F., Grismer, L. L., Itescu, Y., Kraus, F., LeBreton 2022. A global analysis of viviparity in squamates highlights its prevalence in cold climates. Global Ecology and Biogeography, 00, 1–16 - get paper here
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