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Sceloporus internasalis SMITH & BUMZAHEM, 1955

IUCN Red List - Sceloporus internasalis - Least Concern, LC

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Higher TaxaPhrynosomatidae, Sceloporinae, Iguania, Sauria, Squamata (lizards)
Subspecies 
Common NamesS: Espinosa de Hocico con Escamitas
E: Mail-snouted Spiny Lizard 
SynonymSceloporus malachiticus internasalis SMITH & BUMZAHEM 1955 (fide KÖHLER 2000)
Sceloporus internasalis — BELL et al. 2003
Sceloporus internasalis — KÖHLER 2008
Sceloporus internasalis — WIENS et al. 2010 
DistributionMexico (S Veracruz, Chiapas, E Oaxaca), W Guatemala

Type Locality: La Gloria, Oaxaca, Mexico.  
Reproductionviviparous 
TypesHolotype: INHS (= UIMNH) 35617, collected 12 March 1953 by Thomas MacDougall 
DiagnosisDiagnosis: A Sceloporus closely related to Sceloporus m. malachiticus, with supraoculars in one row; median frontonasal separated from lateral frontonasals; dorsal scales large; shoulder patches absent or if present separated dorsally by 6 or 7 scale rows; no supraoculars in contact with median head scales; 2 rows of scales between nasals and rostral; 2 rows of scales between nasals and first labial; internasal area broken up into many very small, rounded scales (Smith & Bumzahem 1955).

Comparisons. Specimens of all Mexican subspecies of Sceloporus malachiticus have been available for comparison. Sceloporus m. internasalis may be distinguished from salvini by its lack of a complete nuchal collar or a collar separated by only one scale row, a much lower dorsal scale count, and supraoculars in a single row. It differs from acanthinus by having no supraoculars in contact with the median head scales, no broad, nearly complete nuchal collar, and median frontonasal not in contact with lateral frontonasals. It may be separated from taeniocnemis by its lower dorsal scale count, and supraoculars in one instead of two rows. Sceloporus m. internasalis differs from all in having the internasal area broken up into small rounded scales, and two rows of scales between nasals and rostral (also between nasals and labials) (Smith & Bumzahem 1955). 
CommentSynonymy: this species has been considered as a synonym of S. salvini by Smith and Perez-Higareda (1992).

Group: S. formosus group (sensu lato, fide PÉREZ-RAMOS & SALDAÑA DE LA RIVA 2008) 
EtymologyThe Latin inter, "between," nasus, "nose," and -alis, "having the quality of," refer to the many small scales in the internasal area. 
References
  • Aguilar-López JL, Luría-Manzano R, Pineda E, Canseco-Márquez L 2021. Selva Zoque, Mexico: an important Mesoamerican tropical region for reptile species diversity and conservation. ZooKeys 1054: 127-153 - get paper here
  • Bell, E.L.; Smith, H.M. & Chiszar, D. 2003. AN ANNOTATED LIST OF THE SPECIES-GROUP NAMES APPLIED TO THE LIZARD GENUS SCELOPORUS. Acta Zoologica Mexicana (n.s.) 90: 103-174 - get paper here
  • Casas-Andreu, G., F.R. Méndez-De la Cruz and X. Aguilar-Miguel. 2004. Anfibios y Reptiles; pp. 375–390, in A.J.M. García-Mendoza, J. Ordoñez and M. Briones-Salas (ed.). Biodiversidad de Oaxaca. Instituto de Biología, UNAM-Fondo Oaxaqueño para la Conservación de la Naturaleza-World Wildlife Fund, México, D. F.
  • García-Padilla, E., Mata-Silva, V., Villalobos-Juárez, I., López-Esquivel, E. A., Lavariega, M. C., Rocha, A., DeSantis, D. L., Melgar-Martínez, A. I., Johnson, J. D., Fucsko, L. A., Lazcano, D., & Wilson, L. D. 2022. Anfibios y reptiles de la región de los Chimalapas, Istmo de Tehuantepec, Oaxaca, México:: composición, categorización distribucional, estado de conservación y significado para la biodiversidad. Biología Y Sociedad, 5(10), 37–76 - get paper here
  • Günther, A. C. L. G. 1885. Reptilia and Batrachia. Biologia Centrali-Américana. Taylor, & Francis, London, 326 pp. [published in parts from 1885-1902; reprint by the SSAR 1987] - get paper here
  • Hernández-Vázquez, M E; 2019. Sceloporus internasalis (Mail-snouted Spiny Lizard) Antipredator behavior. Herpetological Review 50 (1): 144-145 - get paper here
  • Johnson, Jerry D.; Vicente Mata-Silva, Elí García Padilla, and Larry David Wilson 2015. The Herpetofauna of Chiapas, Mexico: composition, distribution, and conservation. Mesoamerican Herpetology 2 (3): 272–329. - get paper here
  • Köhler, G. 2000. Reptilien und Amphibien Mittelamerikas, Bd 1: Krokodile, Schildkröten, Echsen. Herpeton Verlag, Offenbach, 158 pp.
  • Köhler, G. 2008. Reptiles of Central America. 2nd Ed. Herpeton-Verlag, 400 pp.
  • Köhler, G. & Heimes, P. 2002. Stachelleguane. Herpeton-Verlag (Offenbach), 174 pp.
  • Mata-Silva, Vicente, Jerry D. Johnson, Larry David Wilson and Elí García-Padilla. 2015. The herpetofauna of Oaxaca, Mexico: composition, physiographic distribution, and conservation status. Mesoamerican Herpetology 2 (1): 6–62 - get paper here
  • Pérez-Ramos, E. & Saldaña de La Riva, L. 2008. Morphological revision of lizards of the formosus group, genus Sceloporus (Squamata: Sauria) of southern Mexico, with description of a new species. Bull. Maryland Herp. Soc. 44 (3): 77-98 - get paper here
  • Smith, H. M. 1939. The Mexican and Central American lizards of the genus Sceloporus. Field Mus. Nat. Hist., Zool. Ser. 26: 1-397. - get paper here
  • Smith, H. M. & G. Pérez-Higareda 1992. Nomenclatural fixation of Sceloporus formosus (Reptilia: Sauria) and the status of S. salvini. Bull. Maryland Herp. Soc. 28: 31-43. - get paper here
  • Smith, H. M., & BUMZAHEM, C. B. 1955. The identity of the trans-isthmic populations of the malachite tree-lizard (Sceloporus malachiticus Cope). Herpetologica 11: 118-20. - get paper here
  • Stuart,L.C. 1971. Comments on the malachite Sceloporus (Reptilia: Sauria: Iguanidae) of Southern México and Guatemala. Herpetologica 27: 235-39. - get paper here
  • Torres-Hernández, LA, Ramírez-Bautista A, Cruz-Elizalde R, Hernández-Salinas U, Berriozabal-Islas C, DeSantis DL, Johnson JD, Rocha A, García-Padilla E, Mata-Silva V, Fucsko LA, and Wilson LD. 2021. The herpetofauna of Veracruz, Mexico: composition, distribution, and conservation status. Amphibian & Reptile Conservation 15(2) [General Section]: 72–155 - get paper here
 
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