Cyrtodactylus lateralis (WERNER, 1896)
Can you confirm these amateur observations of Cyrtodactylus lateralis?
|Higher Taxa||Gekkonidae, Gekkota, Sauria, Squamata (lizards: geckos)|
|Common Names||E: Werner’s Prehensile-tailed Bent-toed Gecko, Sumatra Bow-fingered Gecko, Spiny Forest Gecko|
|Synonym||Gymnodactylus lateralis WERNER 1896: 11|
Gymnodactylus lateralis — DE ROOIJ 1915: 7
Cyrtodactylus lateralis — MANTHEY & GROSSMANN 1997: 223
Cyrtodactylus (Cyrtodactylus) lateralis — RÖSLER 2000: 66
Cyrtodactylus lateralis — TEYNIÉ et al. 2010
|Distribution||West Malaysia, Indonesia (Sumatra)|
Type locality: Sumatra
|Types||Holotype: ZMB 12029|
|Comment||Diagnosis. A large species of Cyrtodactylus reaching 100 mm SVL (LSUHC 12579) and distinguished from all congeners by the following combination of characters: (1) body robust; limbs and digits moderate in length; (2) tail prehensile; intact tails 0.97–1.22 times longer than body; (3) tubercles extending from frontal region and supraorbital skin to cover most of tail, 16–20 irregular longitudinal rows of tubercles at midbody, 21–28 irregular transverse rows between limbs; (4) dorsal antebrachium and brachium tuberculate; (5) tubercles on tail extending to 90% of its length; (6) 51–66 ventrals in a transverse row at midbody; (7) conical, spinose tubercles in ventrolateral fold; (8) subcaudals not transversely enlarged; (9) moderate longitudinal sulcus in precloacal region of males; (10) 9–13 precloacal pores in males (0–15) pore primordia in females), femoral pores absent, precloacal pores sunken into precloacal sulcus; pore secretions red; (11) greatly enlarged precloacal pore-bearing scales present; (12) ventral surface of thighs entirely granular or granular except for 2–13 (count combined for both sides) widely spaced enlarged femoral scales; (13) 18–24 lamellae under fourth toe; (14) cloacal tubercles 1–2 on each side, usually in contact with one another; (15) dorsum gray to brown with dark brown markings; venter pale pink, immaculate or with diffuse, darkly pigmented scales forming no obvious pattern; (16) labials pale, contrasting with darker facial band; occiput with few large blotches; postocular stripe brown, edged dorsally by thin black line then by pale pigmented scales; (17) 5–6 transverse, usually broken bands on body; 7–9 bands on tail; caudal bands complete ventrally though faint (Harvey et al. 2016).|
Comparisons. Cyrtodactylus lateralis is very similar to C. durio. Cyrtodactylus lateralis has rounded to subpyramidal tubercles in the temporal region, on the occiput, and on the neck, whereas tubercles in these areas are noticeably larger and distinctly spinose in C. durio. We scored three new specimens of C. durio for the same characters used in the description of C. lateralis. Ranges of meristic and mensural characters of C. durio overlap those of C. lateralis, however extremes of three characters were slightly higher or lower than those of C. lateralis. The three specimens of C. durio (data for KU 173086 followed by KU 173087 then LSUHC 12579 vs. ranges [mean ± standard deviation, sample size] for C. lateralis) had slightly fewer tubercles at midbody (17, 15, and 15 vs 16–20 [18 ± 1, n = 13]), slightly fewer lamellae under finger IV (15, 17, and 17 vs. 16–20 [18 ± 1, n = 14]), and a slightly larger orbit (diameter of orbit 27.8%, 28.7%, and 26.5% of head length vs. 20.6–27.6% [25.4 ± 1.6, n = 16]) than the series of C. lateralis. All specimens of C. durio lack enlarged subfemoral scales, whereas 70% of C. lateralis had these scales.
Cyrtodactylus lateralis, C. brevipalmatus, C. durio, C. elok, and C. stresemanni are the only Sunda Shelf species with a spinose, prehensile tail. Unlike C. stresemanni (characters in parentheses), C. lateralis has 16–20 tubercles across midbody (13), a transversely banded dorsum (wide, dark brown chevrons on flanks separated by undulating pale vertebral stripe), and small irregular blotches on the occiput (large, dark triangular occipital mark). Unlike C. brevipalmatus and C. elok, C. lateralis has a precloacal sulcus (absent), spinose tubercles in the ventrolateral fold (tubercles absent from fold), 51–66 ventrals (35–49), and caudal whorls of six tubercles separated by granular scales ventrolaterally (caudal whorls of four tubercles; ventrolateral tubercles separated by lanceolate scales forming ventrolateral fringe, Harvey et la. 2016).
Distribution: See map in Harvey et al. 2016: 526 (Fig. 5).
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