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Eutropis islamaliit BARLEY, DIESMOS, SILER, MARTINEZ & BROWN, 2020

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Higher TaxaScincidae, Mabuyinae (Mabuyini), Scincoidea, Sauria, Squamata (lizards)
Common NamesE: Striking Philippine Sun Skink 
SynonymEutropis islamaliit BARLEY, DIESMOS, SILER, MARTINEZ & BROWN 2020: 53
Mabuya multicarinata borealis — BROWN & ALCALA 1980: 128 [in part, misidentification]
Eutropis multicarinata borealis — MAUSFELD & SCHMITZ 2003: 164 [by implication]
Eutropis Clade G — BARLEY et al. 2013: 3563
Eutropis islamaliit — BARLEY et al. 2021 

Type locality: Barangay Tinogboc, Municipality of Caluya, Antique Province, Semirara Island, Philippines  
TypesHolotype: PNM 9847, Male, (formerly KU 302873), collected by C.D. Siler, 18 November 2000.
Paratypes: KU 304013, collected by RMB, CDS, V. Yngente, and C.W. Linkem, 12 December 2005, near Barangay Vigo, Municipality of Lubang, Occidental Mindoro Province, Lubang Island. KU 320491, collected by CDS, V. Yngente, and J.B. Fernandez, near Sitio Dangay, Barangay Vigo, Municipality of Lubang, Occidental Mindoro Province, Lubang Island at 210 m (13.788858N, 120.163938E). CAS 127862 (collected 10 May 1970), CAS 127867–127868 (collected 11 May 1970), collected by L. Alcala, near Barrio Alegria, Bolagsong, Antique Province, Semirara Island at 300–400 ft. KU 344231, collected by RMB and J.B. Fernandez, 9 April 2016, in the Kaantulan River Drainage, near Sitio Bangon, Barangay Guinmaayohan, Municipality of Balangiga, Eastern Samar Province, Samar Island at 145 m (11.20918N, 125.37598E).
Additional specimens: LSUHC 
DiagnosisDiagnosis: A species of Eutropis, distinguished by the following combination of characters: (1) adult body medium- sized (SVL 70–96 mm); (2) interparietal medium-sized, parietals in contact posteriorly; (3) paravertebrals 41–44; (4) sum of subdigital lamellae on all five toes of one foot 86–92; (5) ventral scales rows 30–32; (6) midbody scale rows 31–33; (7) keels on the dorsal and lateral body scales moderately defined, 5–10; (8) lower eyelid scaly; (9) supraciliaries 5–7; (10) prefrontal separated; (11) primary temporal scales one or two; (12) lateral band sharply defined, lacking dark, mottled coloration, and highlighted below by a crisp transition to light, ventral coloration (Fig. 7).

Comparisons: Critical comparisons for E. islamaliit include other Philippine species of Eutropis, particularly those known from the central islands of the archipelago. Eutropis islamaliit can be readily distinguished from species of the E. indeprensa complex by its high total number (86– 92) of subdigital toe lamellae (vs. 71–83 in E. indeprensa, 59– 70 in E. cumingi, or 63–77 in E. sahulinghangganan) and larger (SVL 70–97 mm) adult body size (vs. 48–64 mm in E. indeprensa, 43–60 mm in E. cumingi, or 40–63 mm in E. sahulinghangganan). It can be distinguished from E. multi- fasciata by its smaller maximum body size (adult SVL 70–97 mm vs. 101–141 mm), and its more strongly keeled (vs. lightly or barely keeled) and numerous (6–9 vs. 3) keels on the trunk dorsals. It can be distinguished from E. borealis (its sister species) by the presence of a crisply defined lateral band (vs. a dark, mottling coloration below causing a gradual transition to the light ventral coloration). Eutropis islamaliit also appears to exhibit a slightly larger body size, more vertebral and ventral scale rows, and a larger interparietal than E. borealis (though our specimen sample size is small, and there is overlap in these characters; Table 1). It can be distinguished from E. multicarinata and E. caraga by the presence of a crisply defined lateral band (vs. a dark, mottling coloration below causing a gradual transition to the light ventral coloration; Fig. 7) and a smaller interparietal scale that does not completely separate the parietals (vs. a large interparietal scale completely separating the parietals). It can also be distinguished from E. multicarinata by the presence of more total toe lamellae (86–92 vs. 74–80) and its slightly larger body size (70–97 mm. vs. 61–72).

Coloration in life: Dorsal ground coloration and tail an iridescent bronze to olive coloration, with scattered dark flecks; head and neck brown. The lateral surfaces contain a thick, brown band with darker edges that extends from the eye to the hindlimb. Ventral surface a striking bluish-white coloration that borders lateral band. Dorsal surfaces of forelimbs, hindlimbs, and digits bronze with indistinct spots. Chin cream with dark markings. 
EtymologyThe specific epithet is an adjectival derivation from the Tagalog noun isla (meaning island) and adjective maliit (meaning small) in reference to fact that most specimens that have been collected are from small, offshore islands. We name this species to draw attention to the importance of these small peripheral islands, which are usually disregarded in Philippine government and nongovernment organization conservation management planning (Oliveros et al. 2011; Brown et al. 2013a; Siler et al. 2014). The species’ epithet is feminine in gender. 
  • Barley, A. J., Diesmos, A. C., Siler, C. D., Martinez, C. M. & Brown, R. M. 2020. Taxonomic Revision of Philippine Sun Skinks (Reptilia: Squamata: Scincidae: Eutropis), and Descriptions of Eight New Species. Herpetol. Monogr. 34: 39–70
  • Barley, Anthony J.; Marites B. Sanguila and Rafe M. Brown 2021. A new species of Sun Skink (Reptilia: Scincidae: Eutropis) from the Zamboanga Peninsula, southwestern Mindanao Island, Philippines. Philippine Journal of Systematic Biology 14 (2): 1-18; DOI: 10.26757/pjsb2020b14012 - get paper here
  • Brown, WC. & A.C. ALCALA 1980. Philippine Lizards of the family Scincidae. Silliman Univ. Nat. Sci., Dumaguete City, Mon., Ser. 2: i-xi + 1-246.
  • MAUSFELD, Patrick & Andreas SCHMITZ 2003. Molecular phylogeography, intraspecific variation and speciation of the Asian scincid lizard genus Eutropis Fitzinger, 1843 (Squamata: Reptilia: Scincidae): taxonomic and biogeographic implications. Org. Divers. Evol. 3: 161–171 - get paper here
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