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Brachymeles dalawangdaliri DAVIS, GEHEBER, WATTERS, PENROD, FELLER, ASHFORD, KOURI, NGUYEN, SHAUBERGER, SHEATSLEY, WINFREY, WONG, SANGUILA, BROWN & SILER, 2016

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Higher TaxaScincidae, Scincinae, Scincoidea, Sauria, Squamata (lizards)
Subspecies 
Common NamesE: Tablas Slender Skink 
SynonymBrachymeles dalawangdaliri DAVIS, GEHEBER, WATTERS, PENROD, FELLER, ASHFORD, KOURI, NGUYEN, SHAUBERGER, SHEATSLEY, WINFREY, WONG, SANGUILA, BROWN & SILER 2016
Brachymeles bonitae — DUMÉRIL & BIBRON 1839
Brachymeles bonitae — TAYLOR 1917: 276
Brachymeles bonitae — BROWN 1956:5
Brachymeles bonitae — BROWN & RABOR 1967:526
Brachymeles bonitae — BROWN & ALCALA 1970
Brachymeles bonitae — BROWN & ALCALA 1980:20
Brachymeles bonitae — DAVIS et al. 2014 
DistributionPhilippines (Romblon Province, Tablas Island)

Type locality: Barrio Dubduban, Municipality of San Augustin, Romblon Province, Tablas Island, Philippines (12.58333° N, 122.10000° E; WGS 84; 500–800 ft. elevation.  
Reproduction 
TypesHolotype: CAS 137149, adult male, collected among rotting leaves in early secondary growth forest on 24 May 1972 by L.C. Alcala. Paratypes. Five adult females (CAS 137148, 137150, 137151, 137153, 137154) and one adult male (CAS 137152) were collected in Barrio Dubduban, Municipality of San Augustin, Romblon Province, Tablas Island, Philippines (12.58333° N, 122.10000° E; WGS 84), by L.C. Alcala. CAS 137148 was collected in a rotting coconut trunk on 23 May 1972 (150–250 ft. elev.), CAS 137150–137152 were collected in humus under a rotting log in original forest on 1 June 1972 (450 ft. elev.), and CAS 137153, 137154 were collected in humus under a rotting log in original forest on 2 June 1972 (550 ft. elev.). 
DiagnosisDiagnosis: Following recent taxonomic revisions of Brachymeles (Siler et al. 2011; Davis et al. 2014) the new species is assigned to the B. bonitae Complex based on the following suite of morphological characters: (1) limbs present, (2) non-pentadactyl, (3) fore-limbs with 0–3 fingers. (4) hind limbs with 0–2 toes, (5) paravertebral scale rows ≥ 91, (6) presacral vertebrae 47–53, (7) supraoculars four, (8) enlarged, differentiated nuchals present, (9) longitudinal rows of dark spots around the body absent, and (10) auricular opening absent.
Brachymeles dalawangdaliri sp. nov. can be distinguished from congeners by the following combination of characters: (1) body size small (SVL 66.0–80.9 mm), (2) fore-limbs bidactyl, (3) hind limbs digitless, unidactyl, or bidactyl, (4) limb length short, (5) supralabials six or seven, (6) infralabials six or seven, (7) supraciliaries five, (8) supraoculars four, (9) midbody scale rows 24 or 25, (10) axilla–groin scale rows 80–83, (11) paravertebral scale rows 97–101, (12) prefrontal contact absent, (13) frontoparietal contact present or absent, (14) enlarged chin shields in two pairs, (15) nuchals enlarged, (16) auricular opening absent, (17) presacral vertebrae 49, and (18) uniform body color (Tables 1, 2).


Additional details (2412 characters) are available for collaborators and contributors. Please contact us for details. 
CommentHabitat: Presumably, Brachymeles dalawangdaliri sp. nov. once occurred in primary growth forest; however, little to no primary forest remains on Tablas Island.

Abundance: This species has never been observed in high densities, a pattern consistent with many members of the B. bonitae complex. Furthermore, no recent collections of this species have been made, with the last documented observation of B. dalawangdaliri sp. nov. in the wild occurring more than four decades ago (see also Meiri et al. 2017).

Sympatry: B. talinis (Siler & Brown 2010). 
EtymologyThe name of the new species presented in this paper is derived from the Tagalog (Filipino) terms ‘dalawa,’ meaning two, and ‘daliri,’ meaning finger, referencing one of the defining characteristics of the new species, the two digits on the fore-limbs. 
References
  • Brown WC & RABOR DS 1967. Review of the genus Brachymeles (Sauria), with descriptions of new species and subspecies. Proc. Cal. Acad. Sci. (4) 34: 525-548 - get paper here
  • Brown, Walter C. 1956. A revision of the genus Brachymeles (Scincidae), with descriptions of new species and subspecies. Breviora (54): 1-19 - get paper here
  • Brown, Walter C.; Alcala, Angel C. 1970. The zoogeography of the herpetofauna of the Philippine Islands, a fringing archipelago. Proc. Cal. Acad. Sci. 38 (6): 105-130 - 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.
  • DAVIS, DREW R.; AARON D. GEHEBER, JESSA L. WATTERS, MICHELLE L. PENROD, KATHRYN D. FELLER, ALISSA ASHFORD, JOSH KOURI, DANIEL NGUYEN, KATHRYN SHAUBERGER, KYRA SHEATSLEY, CLAIRE WINFREY, RACHEL WONG, MARITES B. SANGUILA, RAFE M. BROWN & CAMERON D. SIL 2016. Additions to Philippine Slender Skinks of the Brachymeles bonitae Complex (Reptilia: Squamata: Scincidae) III: a new species from Tablas Island. Zootaxa 4132 (1): 030–043 - get paper here
  • Davis, Drew R.; Kathryn D. Feller, Rafe M. Brown, and Cameron D. Siler 2014. Evaluating the Diversity of Philippine Slender Skinks of the Brachymeles bonitae Complex (Reptilia: Squamata: Scincidae): Redescription of B. tridactylus and Descriptions of Two New Species. Journal of Herpetology 48 (4): 480-494. - get paper here
  • Meiri, Shai; Aaron M. Bauer, Allen Allison, Fernando Castro-Herrera, Laurent Chirio, Guarino Colli, Indraneil Das, Tiffany M. Doan, Frank Glaw, Lee L. Grismer, Marinus Hoogmoed, Fred Kraus, Matthew LeBreton, Danny Meirte, Zoltán T. Nagy, Cristiano d 2017. Extinct, obscure or imaginary: the lizard species with the smallest ranges. Diversity and Distributions - get paper here
  • Meneses CG, Siler CD, Alviola PA, Gonzalez JCT, Balatibat JB, Natividad CA, Brown RM 2022. Amphibian and reptile diversity along a ridge-to-reef elevational gradient on a small isolated oceanic island of the central Philippines. Check List 18(5): 941-948 - get paper here
  • Meneses, C. G., Siler, C. D., Gonzalez, J. C. T., Wood Jr, P. L., & Brown, R. M. 2020. Molecular phylogenetic estimates of evolutionary affinities and the first reports of phenotypic variation in two secretive, endemic reptiles from the Romblon Island Group, central Philippines. Philippine Journal of Systematic Biology 14 (2): 1-20 - get paper here
  • Siler, C. D., Freitas, E. S., Sheridan, J. A., Maguire, S. N., Davis, D. R., Watters, J. L., ... & Brown, R. M. 2020. Additions to Philippine slender skinks of the Brachymeles bonitae complex (Reptilia: Squamata: Scincidae) IV: Resurrection and redescription of Brachymeles burksi. Philippine Journal of Systematic Biology, DOI 10.26757/pjsb2020b14005 - get paper here
  • Taylor,E.H. 1917. Brachymeles, a genus of Philippine lizards. Philippine Journal of Science 12: 267-279 - get paper here
 
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