Cyrtodactylus rosichonariefi, Riyanto, Awal, Grismer, L. Lee & Wood, Perry L., 2015

Riyanto, Awal, Grismer, L. Lee & Wood, Perry L., 2015, Cyrtodactylus rosichonariefi sp. nov. (Squamata: Gekkonidae), a new swamp-dwelling bent-toed gecko from Bunguran Island (Great Natuna), Indonesia, Zootaxa 3964 (1), pp. 114-124 : 118-121

publication ID	https://doi.org/ 10.11646/zootaxa.3964.1.8
publication LSID	lsid:zoobank.org:pub:6BF99E00-3617-466B-9D89-C9DB3583DD18
DOI	https://doi.org/10.5281/zenodo.5610955
persistent identifier	https://treatment.plazi.org/id/7A604A24-FFA7-413D-FF0E-FB34FBD83098
treatment provided by	Plazi
scientific name	Cyrtodactylus rosichonariefi
status	sp. nov.

Treatment

Cyrtodactylus rosichonariefi sp. nov.

English common name: Rosichonariefi’s Bent-toed Gecko Indonesian common name: Cicak Kecil Rosichonariefi ( Figs. 3 View FIGURE 3 , 4 View FIGURE 4 )

Holotype. MZB.Lace.12132, an adult male from the Sekunyam Forest, Bunguran Selatan Subdistrict, Natuna District, Kepulauan Riau Province, Bunguran Island (Great Natuna), Indonesia (3°40’29.4” N; 108°09’16.0” E; elevation 80 m), collected on 15 August 2013 at 20h25 by A. Riyanto and Zamri.

Paratype. MZB.Lace.12133, subadult male, Sekunyam Forest, Bunguran Selatan Subdistrict, Natuna District, Kepulauan Riau Province, Bunguran Island, Indonesia (03°40’30.1” N; 108°09’21.1” E; elevation 80 m), collected on 16 April 2014 at 19h30 by A. Riyanto and L.L. Grismer.

Diagnosis. SVL of only known adult male 54.6 mm; body relatively robust; limbs and digits short, relatively slender; 19 irregularly aligned rows of strongly keeled dorsal tubercles; 34 paravertebral tubercles; 46 ventral scales between ventrolateral folds; no precloacal groove; no precloacal pores; six slightly enlarged rows of femoral scales on the anterior portion of the thighs meet abruptly with postfemoral scales; enlarged precloacal scales; 12 or 13 subdigital lamellae on the first toe; 18 or 19 subdigital lamellae on the fourth toe; no enlarged subcaudal scales; reddish brown iris.

Description of holotype ( Fig. 3 View FIGURE 3 A). Adult male, SVL 54.6 mm; head moderately long (HL/SVL 0.30), relatively narrow (HW/HL 0.58), depressed (HD/HL 0.39), distinct from neck; lores and interorbital regions concave; canthus rostralis prominent and rounded; frontonasal region concave; snout elongate (ES/HL 0.37), relatively pointed, longer than ED (ED/ES 0.60); scales on snout and forehead small, rounded, granular, homogeneous; scales on snout larger than those on occipital region; eye large (ED/HL 0.22); pupil vertical with crenellated margins when constricted, and smooth margins when expanded; supraciliaries short, bearing small conical spines posteriorly; ear opening oval, large (EarL/HL 0.10); EE>ED (EE/ED1.38); rostral incompletely divided dorsally by a Y-shaped shallow groove; two enlarged supranasals separated from each other by three intersupranasals, two of them contact the smaller snout scales and one of them completely surrounded by the larger scales ( Fig. 4 View FIGURE 4 C); naris oval, bordered by rostral anteriorly, first supralabial and supranasal dorsally, and two enlarged postnasals dorsally; orbit separated from supralabials by three rows of small scales; mental triangular, wider (2.1 mm) than deep (1.6 mm), bordered anterolaterally by first infralabials and posteriorly by paired elongate postmentals that contact medially for 40% of their posterior sections, followed by seven gular scales arranged in a row with two slightly enlarged scales at their lateral termini ( Fig. 4 View FIGURE 4 B); both right and left sides consist of 10 supralabials to the rictus, 8 to midpoint the eye; nine infralabials scales to the rictus ( Fig. 4 View FIGURE 4 A).

Body relatively robust, elongate (TrL/SVL 0.46) with ventrolateral folds; ventrolateral folds with bearing small, scattered tubercles; gular region bearing relatively homogeneous, smooth scales; dorsal scales granular to conical; 19 irregular rows of dorsal tubercles at midbody; smallest tubercles on flanks and in the frontal region; 34 paravertebral tubercles; ventral scales much larger than dorsals, smooth, round, subimbricate, largest posteriorly; 46 ventral scale rows at midbody between ventrolateral folds; precloacal groove absent; no precloacal pores; six slightly enlarged rows of femoral scales on the anterior portion of the thighs meet abruptly with postfemoral scales; ( Fig. 4 View FIGURE 4 F); precloacal region has 6 rows of slightly enlarged scales ( Fig. 4 View FIGURE 4 F); scales on palmar surfaces granular, juxtaposed ( Fig. 4 View FIGURE 4 D); scales on plantar surfaces and hind limbs granular, juxtaposed ( Fig. 4 View FIGURE 4 E).

Forelimbs and hind limbs relatively robust (FL/SVL 0.16; TBL/SVL 0.16); digits relatively short, strongly inflected at basal interphalangeal joints, all bearing slightly curved claws; basal subdigital lamellae nearly as broad as digit; subdigital lamellae on manus 12–14–15–16 –14, not including ventral claw sheath; count of subdigital lamellae on pes 12–15–17–19 –18, not including ventral claw sheath; interdigital webbing present but weakly developed; relative length of fingers II>III>IV>I>V and of toes IV>V> III> II> I.

Tail regenerated (and broken during the preservation process), cylindrical, segmented, with each segment consisting of 7–8 scales in a row dorsally, tapering to the tip, no median enlarged subcaudal scales; one postcloacal tubercle on each side of tail base; medial row of subcaudals smooth, no enlarged scales; dorsal caudal scales flat, round, hexagonal, or pentagonal, and juxtaposed.

Coloration in life ( Fig. 3 View FIGURE 3 A). Ground color of body, head, limbs, and tail pinkish grey; dark, irregularly shaped markings on rostrum and top of head; weak dark stripe extending from postnasal region through eye and continuing to ear opening; paired offset, paravertebral dark blotches extending onto base of tail to form irregularly shaped bands alternating with irregularly shaped white bands; some whitish tubercles on flanks; dorsal surfaces of limbs banded; ventral surfaces dull, generally immaculate, and lighter than dorsal surfaces; iris reddish brown with yellow supraciliary scales ( Fig. 3 View FIGURE 3 B).

Variation. The coloration and pattern of the paratype closely matches that of the holotype ( Fig.3 View FIGURE 3 A, C). The paratype has a blotched vertebral region that continues onto the caudal regions as irregularly shaped bands of which there are seven anterior to the regenerate. Measurement (in mm) of holotype (MZB.Lace.12132) is followed by sub adult male paratype in parentheses (MZB.Lace.12133): SVL 54.6 (45.9), TrL 23.8 (19.4), HL 16.6 (13.7), HW 9.7 (8.3), HD 6.4 (5.5), ED 3.7 (3.6), EE 5.1 (4.2), ES 6.2 (6.0), EN 4.5 (4.4), IO 4.9 (3.5), IN 2.0 (1.8), EarL 1.6 (0.9), FL 8.5 (6.8), TBL 8.8 (8.5), TL 58.3 regenerated (broken) and TW 5.0 (3.6).

Etymology. The specific epithet rosichonariefi combines the names of two Indonesian scientists. We would like to recognize the contributions made by Rosichon Ubaidillah, an entomologist and director of the Museum Zoologicum Bogoriense (MZB), and Ahmad Jauhar Arief, a former director of MZB. Both gentlemen are very supportive and provide opportunities and facilities for young researchers at the MZB to develop their skills. We fell that naming a species after them is a much-deserved honor.

Species comparisons. Cyrtodactylus rosichonariefi sp. nov. is distinguished from all congeners of the C. semenanjungensis species complex ( Grismer et al. 2014b) of Peninsular Malaysia and Singapore except C. majulah , C. pantiensis Grismer, Chan, Grismer, Wood & Belabut , C. metropolis Grismer, Wood, Chan, Anuar & Muin , and C. payacola Johnson, Quah, Shahrul, Muin, Wood, Grismer, Greer, Chan, Ahmad, Bauer & Grismer , by having a reddish iris, absence of reticulated pattern on head, lack femoral pores and lack of enlarged median subcaudal. As enumerated in Table 2 View TABLE 2 , C. rosichonarief can be readily differentiated from C. majulah , C. metropolis , C. pantiensis and C. payacola by absence both of precloacal pores and tubercles on the forearm. It is differs from C. majulah by absence of enlarged precloacal scales, fewer dorsal tubercles (19 versus 22), fewer paravertebral tubercles (34 versus 39–46) and fewer subdigital lamellae on the fourth toe (18–19 versus 20–23). It is further differentiated from C. metropolis by the absence of enlarged precloacal scales, fewer dorsal tubercles (16 versus 22), fewer subdigital lamellae on the fourth toe (18–19 versus 20–21) and by having a blotched as opposed to a banded dorsal pattern. The new species can differentiated from C. pantiensis by fewer dorsal tubercles (19 versus 22) and subdigital lamellae on fourth toe (18–19 versus 22–23). It can be differentiated from C. payacola by absence of enlarged precloacal scales, fewer dorsal tubercles (19 versus 21) and fewer paravervetebral tubercles (34 versus 37–39). These character states are scored across all species of the swamp-dwelling clade in Table 2 View TABLE 2 .

Natural history. Sekunyam Forest surrounds a small swampy area where the type material collected ( Fig. 5 View FIGURE 5 ). The holotype was found while it was foraging 1 m above ground on the trunk of a small tree (trunk diameter approximately 30 cm). The paratype (and one additional specimen that was not vouchered) entered a burrow on the forest floor to escape. All lizards were found in the vicinity of a small swampy pond that is periodically flooded during rains. The natural history of this species is very similar to that of all the other swamp-dwelling species except for the secondarily karst-adapted species C. metropolis ( Grismer et al. 2014b).