Cyrtodactylus mamberamo Oliver, Boothroyd, Tjaturadi, Riyanto, Iskandar & Richards, 2024, sp. nov.

Cyrtodactylus mamberamo sp. nov. Mamberamo Basin Bent-toed Gecko urn:lsid:zoobank.org:act: F9F01B5C-5DA6-4C79-BE0E-7524A15761C3 Figs. 1–3, 4A–B Cyrtodactylus sp. ‘Mamberamo’ Tallowin et al. 2018; Grismer et al. 2021a Holotype.— MZB lace 5312 (field number SJR 9807), adult male, foothills of Foja Mountains, Kaliwiri Camp, Kwerba village, Mamberamo Tengah district, Mamberamo Raya regency (2.6411°S, 138.4152°E; 100 m. a.s.l.), Papua Province, Indonesia, collected by Stephen Richards and Burhan Tjaturadi on 17 November 2005. Paratypes.—(n = 6). MZB lace 5343 (field number SJR9789), female, same locality and collector details as holotype, collected on 16 November 2005; MZB lace 5439 (SJR6085), adult male, foothills of Foja Mountains (2.3705°S, 138.2126°E; ~ 500 m. a.s.l,), Papua Province, Indonesia, collected by Stephen Richards and Burhan Tjaturadi on 18 July 2004; MZB lace 5437 (SJR6032), adult male, Marina Valen Village (2.3902°S, 138.1957°E; 350 m. a.s.l,), Papua Province, Indonesia, collected by Burhan Tjaturadi on 15 July 2004; SAMA R62645 (JCU5669), female, Furu Camp approximately 3 km SE Dabra, Mamberamo Basin, Papua Province (3.2844°S, 138.6361°E; 90 m a.s.l.), Papua Province, Indonesia, collected by Stephen Richards, Burhan Tjaturadi and Djoko Iskandar on 2 September 2000; SAMA R62646 (SJR [JCUNQ5610]) adult female, Yongsu, Cyclops Mountains (2.4383°S, 140.5145°E; 0 m a.s.l.), Papua Province, Indonesia, collected by Stephen Richards, Burhan Tjaturadi and Djoko Iskandar on 25 August 2000; AMS R130352 (FE250), adult male, Wilbeite Village (3.416°S, 142.116°E; ~ 870 m a.s.l.), West Sepik Province, Papua New Guinea, collected by T. Flannery on 6 November 1988. Referred Material.—(n = 18). BNHM 1938.6.6.70, Sabron, Cyclops Mountains, Papua Province, Indonesia; CAS 89683, Lake Sentani, Papua Province, Indonesia; ZMA. RENA.11873, “ Noordwyk res Hollandia ”, Indonesia; ZMA. RENA.15383–5, “ Prauwenbivak am Idenburg River ”, Papua Province Indonesia; ZMA. RENA.15382, “ Njao, a/d Tjano, N-New Guinea”, Indonesia; ZMA. RENA.17885, “ Pioniersbivak am Idenburg River ”, Indonesia; MZB lace 3561–3564, Yongsu, Cyclops Mountains (2.4383°S, 140.5145°E; 0 m a.s.l.), Papua Province, Indonesia; MZB lace 3565–3566, Furu Camp, Papua Province, Indonesia; MZB lace 2303 (2 specimens), Siewa, Wapoga River Basin (3.0367°S, 136.3752°E; 50 m a.s.l.), Papua Province, Indonesia; ZMB 62271, 54 km along the road from Nabire after Mapia (3.4967°S; 135.7315°E, 750 m. a.s.l.), Papua Tengah Province, Indonesia; ZMB 62272, Unipo Village, along the road between Nabire and Mapia (3.5305°S, 135.933°E, 250 m a.s.l.), Papua Tengah Province, Indonesia. Diagnosis.— Cyrtodactylus mamberamo sp. nov. can be distinguished from all other Melanesian Cyrtodactylus by the unique combination of moderately large adult size (SVL up to at least 94 mm), throat tubercles absent, medial row of transversely enlarged subcaudal scales present on original tail, upper arm with enlarged tubercles, dorsal pattern consisting of six or more thin light-buff transverse bands with thin dark-brown anterior borders of equivalent width, regions of dorsum between bands evenly pale to medium brown, original tail with 8–11 thin pale bands typically narrower in width than maximum width of tail, and males with widely disjunct series of small precloacal (11–17) and femoral (7–17) pores on each side (30–38 in total). Description of holotype.—Adult male of moderate size (SVL 85.0 mm, TrK 37.2 mm) with largely regrown tail (22 mm original, 72 mm regrown). Head large (HL/SVL 0.26), moderately wide (HW/SVL 0.19), clearly distinct from neck in dorsal profile (Fig. 2). Snout shorter than broad, truncate in lateral profile, rounded in dorsal profile. Loreal region slightly inflated, interorbital region and top of snout concave. Canthus rostralis rounded, weakly defined, eye-to-naris distance greater than orbital diameter (EN/OrB 1.23). Eyes large (OrB /HL 0.30), sunken into sockets, pupil vertical; supraciliaries extending from anteroventral to posterodorsal edge of orbit, largest at anterodorsal corner. Ear openings roughly triangular, anterior portion much narrower than posterior portion, bordered by small skin fold at posterodorsal corner. Rostral scale sub-quadrangular with slight medial notch on dorsal edge, wider (4.4 mm) than high (3.0 mm), bordered dorsally by two square supranasals and two irregular internasals of similar size, with third much smaller rounded internasal sitting above left large internasal. Nares bordered by rostral, first supralabial, four (right) or five (left) granular postnasals, a distinctly enlarged ovoid dorsal postnasal approximately twice diameter of other postnasals, and a supranasal. Supralabials 12 to rictus of jaw, nine on left and ten on right to midpoint of eye, variable in size and proportions, anteriormost taller than wide, becoming wider than high medially, then diminishing in size and becoming taller than wide towards posterior edge of jaw. Head, temporal, and nuchal scales small and granular, nuchal and temporal regions with numerous low rounded tubercules approximately 2–3 times diameter of surrounding scales. Infralabials 11 to rictus of jaw, wider than high, becoming smaller posteriorly, bordered ventrally by several rows of slightly enlarged scales grading into smaller granular gular scales. Mental wider (2.5 mm) than long (1.6 mm), anterior edge rounded, concave at point of contact with two postmentals; postmentals large (length 3 mm), in contact with each other and first infralabial on respective sides. Body moderately slender (TrK/SVL 0.44), narrower than head in dorsal profile, with distinct ventrolateral folds. Dorsum with approximately 18 transverse rows of low unkeeled tubercles up to three times diameter of surrounding small granular scales. Tubercles along ventrolateral folds distinct, becoming larger posteriorly, 36 on both left and right. Ventral scales much larger than dorsal scales, increasing in size medially, arranged in approximately 42 rows at midpoint of torso. Precloacal pores rounded, indistinct, 12 in total, arranged in continuous very shallow chevron. Femoral pores very small, indistinct, nine on both sides, arranged in straight unbroken series extending from knee for approximately one third length of femur. Enlarged femoral scales arranged in continuous series from knee to precloacal region, pore-bearing series bordered anteriorly by series of similar-sized scales and posteriorly by series of distinctly smaller scales. Limbs slender, forelimbs shorter (FA/SVL 0.14, HDL/SVL 0.17) and less robust than hindlimbs. Dorsal and lateral surfaces of upper and lower limbs covered with numerous rounded tubercules up to two times diameter of surrounding granular scales; on hindlimbs some tubercules extend to dorsal surfaces of pes. Digits long, well developed, with distinct inflection at basal interphalangeal joints; subdigital lamellae smooth, rounded, undivided, and laterally expanded proximal to digital inflection (8-10-10-10-8 on manus; 10-11-12-10-9 on pes); lamellae distal to digital inflection narrow (4-5-6-5-4 on manus; 5-5-7-6-4 on pes); between 3–7 rows of rounded scales between narrow and widened lamellar series; large, recurved claws sheathed by one dorsal and one ventral scale; claw missing from second digit of right pes. Tail thin, moderately long (94 mm total length, 72 mm regrown). Original portion of tail with two dorsal ridges and two lateral ridges running along length; scalation irregular, small granular dorsal scales grade into much larger ventral scales, medial row of transversely enlarged scales starts to form approximately 21 mm posterior to vent, just before break between original and regrown tail; numerous enlarged tubercules on dorsal and lateral surfaces, tending to coalesce into distinct whorls with increasing distance from base of tail. Regrown tail without tubercles and with highly irregular scalation. Three low, rounded, postcloacal tubercles on each side of tail. Colouration in preservative.—Base colouration of dorsal and lateral surfaces of head, neck, torso, and limbs medium brown. Body and neck with series of eight thin, irregular creamish transverse bands (including two nuchal bands) with thin dark-brown indistinctly edged anterior borders of equivalent width; second band chevron shaped, extending anteriorly almost to posterior edge of ear; two posterior-most bands offset at their midpoint. Dorsal tubercles distinctly lighter than ground colouration on most of dorsum, especially towards sides of body, unless positioned within either creamish or dark-brown areas of transverse bands wherein they tend to match surrounding colour. Under a microscope base colouration of dorsum medium-brown with extensive dark-brown maculations; varying density of these maculations is responsible for outward appearance of darker and lighter areas. Venter light buff with few scattered dark-brown maculations. Limb colouration similar to torso, brown on dorsal surfaces, light buff on ventral surfaces, with no obvious pattern other than numerous distinctly lighter tubercles. Original portion of tail with similar dorsal colouration and pattern to torso, with three thin light bands, posteriormost band wider and with dark-brown splotch on posterior as well as anterior margin, ventral surfaces of tail light buff with scattered brown maculations. Regrown portion of tail on both dorsal and ventral surfaces light brown with dense tiny brown maculations that do not form any obvious pattern. Summary measurements of holotype (in mm).—SVL 85.0; TL 94.0; OT 22.0; TrK 37.2; HW 15.9; HL 22.3; HH 9.4; OrB 6.6; FA 12.1; HDL 15.0. Variation.—Mensural data summarised (in mm) for all adults in the type series (four males and three females) are as follows (mean, with the range in parentheses): SVL 82.3 (70.0–92.0); TrK 36.3 (30.5–41.4); OT (n=2) (103– 119); HW 16.0 (13.5–17.7); HL 22.2 (19.7–24.8); HH 9.5 (8.1–10.5); OrB 6.6 (6.0–7.3); FA 12.4 (