Nactus modicus ZUG, 2020
Can you confirm these amateur observations of Nactus modicus?
|Higher Taxa||Gekkonidae, Gekkota, Sauria, Squamata (lizards: geckos)|
|Common Names||E: Louisiade Slender-toed Gecko|
|Synonym||Nactus modicus ZUG 2020: 57|
|Distribution||Papua New Guinea (Milne Bay Province: Louisiade Archipelago: Nimo (Nimowa) Island, Sudest Islands, Rossel (Yela) Island)|
Type locality: Papua New Guinea, Milne Bay Province, Sudest Island, track up Mount Rossel, Point 30, small stream below Camp 2, −11.3543° 154.22315° [Aus66], 640 m. Camp 1, −11.4918° 153.4126°, 127 m asl, along Gesirava River.
|Types||Holotype. BPBM 19852, adult male, collected by Fred Kraus, F. Malesa, and local collectors on 9 April 2004 (Figure 25).|
Paratypes. BPBM 19831–832, 19837–838, adult females from Sudest Island, Araeda, −11.4362° 153.4301°, 0 m asl, collected by Fred Kraus on 10 April 2004, and BPBM 19834, locality as preceding male paratypes, and 19853–854, adult males with the same collecting data as the holotype.
|Diagnosis||Definition. A bisexual taxon of geckos (Gek- koninae) with moderate to large adults (♀♀ 46–65 mm, ♂♂ 48–68 mm SVL) with keeled subcaudals, usually large postmen- tal scales (10–28, median 24), no postmental-infralabial (PmLab = 0) contact, moderate number of dorsal tubercle rows (15–21) and moderate number of tubercles (25–32, usually ≥28) in para- sagittal row (TubRow), tubercles present on dorsal surface of thigh and crus, and precloacal pores (11, 10–14) in males, most females lack pores (0, 0–12). Diagnostic summary in Table 8.|
Variation. Females and males display slight met- ric differences (adult ♀♀ 58.7, 46.0–64.5 mm; adult ♂♂ 56.5, 47.8–67.9 mm SVL), although sharing similar proportions (total adult sample): TrunkL/SVL 40.2%, 37%–45%; HeadL/ SVL 27.7%, 24%–30%; HeadW/SVL 18.5%, 18%–20%; HeadW/HeadL 67.2%, 61%–79%; EyeD/SVL 6.8%, 6%–7%; EyeD/HeadL 24.6%, 21%–28%; NarEye/HeadL 32.4%, 31%– 36%; Interorb/HeadL 26.7%, 24%–32%; SnW/HeadL 14.3%, 13%–17%.
Typical head scale pattern of small, granular scales except for those bordering nares and mouth. Snout with large rostral scale bearing middorsal cleft posteriorly; supranasals moderate sized, usually in contact on midline or separated by small granu- lar scale (internasal); large supralabials (3, 3–4) and infralabi- als (3, 3–4) in front of anterior edge of orbit, first supra- and infralabial largest of respective series. Chin with large trapezoi- dal mental and large postmentals (Postm = 24, 10–28) and no genial scale between postmental and first supralabial (0 PmLab); dorsally, trunk with 18, 15–21 (DorsTub) enlarged tubercles transversely on dorsum and with 28, 25–32 tubercles (TubRow) longitudinally along trunk; 10, 7–12 tubercle rows transversely between hindlimbs (TubHip). Enlarged tubercles on crus and femur (TubHindl = 2). Tail with small uniform scales dorsally and laterally, ventrally variable with uniform, small keeled or smooth scales (Subcaud = 0, 0–1). Usually, pair of cloacal spurs (2, 0–2 CloacS) on each side. Ventral scales from chin to vent small, granular, somewhat larger on chest and abdomen. Precloa- cal pores, males 10–14, females 0–12. Forefoot with narrow dig- its, their lengths usually 3≈4>2≈5>1; 17, 15–19 lamellae beneath fourth digit (4FingLm), 5, 4–6 scale rows on palm; hindfoot with narrow digits, their lengths 3≈4>2≈5>1; 20, 15–23 lamellae beneath fourth toe (4ToeLm).
Coloration in life not reported. In alcohol, color and pattern match the general description of the holotype.
|Comment||Distribution: see map in Zug 2020: 53 (Fig. 22).|
|Etymology||The Latin adjective modicus refers to “moderate,” “medium,” or “average” and is proposed for these populations that represent the size range of many New Guinea populations.|
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