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Nactus acutus KRAUS, 2005

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Higher TaxaGekkonidae, Gekkota, Sauria, Squamata (lizards: geckos)
Subspecies 
Common Names 
SynonymNactus acutus KRAUS 2005
Nactus acutus — PAPENFUSS et al. 2010 
DistributionPapua New Guinea (Louisiade Islands, Woodlark Island)

Type locality: on ridge on S side of Mt. Rossel, Rossel Island, 11.35552° S, 154.22459° E, 720 m elevation, Milne Bay Province, Papua New Guinea.  
Reproductionoviparous 
TypesHolotype: BPBM 20755 (field tag FK 10213), non-reproductive male, collected by F. Kraus . 
DiagnosisDiagnosis: A medium (36.6 mm) species of Nactus lacking dorsal tubercles and
enlarged postnasals; and having granular, largely tricarinate dorsal and ventral scales; lamellate, unexpanded subdigital lamellae; 16 lamellae under the 4th toe; claws lying within four scales; granular postmentals; elongate first infralabials; a single row of scales between the orbit and supralabials; 5 supralabials to center of eye and 7 to rictus; 7 infralabials; keeled scales on the tail; elongate, slit-like ear opening; relatively narrow head (HW/HL = 0.64); long, narrow snout (EN/SV = 0.087, IN/SV = 0.033, EN/IN = 2.7); small eye (EE/SV = 0.055) and interorbital distance (ID/SV =0.063); relatively narrow tail (TW/TL = 0.10); four sternal/xiphisternal ribs; and uniformly dark gray dorsal color.


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CommentAbundance: only known from the type locality (Meiri et al. 2017). This is one of the species called 'lost' and 'rediscovered' by Lindken et al. 2024. 
EtymologyThe name is a masculine Latin adjective meaning “sharp” and is in reference to the long, pointed snout of the species. 
References
  • HEINICKE, MATTHEW P.; ELI GREENBAUM, TODD R. JACKMAN, AARON M. BAUER 2010. Molecular Phylogenetics of Pacific Nactus (Squamata: Gekkota: Gekkonidae) and the Diphyly of Australian Species. Proceedings of the California Academy of Sciences, 61 (17): 633-646 - get paper here
  • Jackman, Todd R.; Aaron M. Bauer, Eli Greenbaum 2008. Phylogenetic relationships of geckos of the genus Nactus and their relatives (Squamata: Gekkonidae). Acta Herpetologica 3 (1): 1-18
  • Kraus, Fred 2005. The genus Nactus (Lacertilia: Gekkonidae): a phylogenetic analysis and description of two new species from the Papuan Region. Zootaxa 1061: 1-28 - get paper here
  • Lindken T.; Anderson, C. V., Ariano-Sánchez, D., Barki, G., Biggs, C., Bowles, P., Chaitanya, R., Cronin, D. T., Jähnig, S. C., Jeschke, J. M., Kennerley, R. J., Lacher, T. E. Jr., Luedtke, J. A., Liu, C., Long, B., Mallon, D., Martin, G. M., Meiri, 2024. What factors influence the rediscovery of lost tetrapod species? Global Change Biology, 30: 1-18 - 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
 
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