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Natrix astreptophora (SEOANE, 1885)

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Higher TaxaColubridae (Natricinae), Colubroidea, Caenophidia, Alethinophidia, Serpentes, Squamata (snakes) 
Common NamesE: Red-eyed grass snake
G: Rotaugen-Ringelnatter 
SynonymTropidonotus natrix var. astreptophorus SEOANE 1885: 15
Natrix natrix astreptophora — MALKMUS 1990
Natrix natrix astreptophora — SCHLÜTER 2009
Natrix natrix astreptophora — FRITZ et al. 2012
Natrix astreptophora — POKRANT et al. 2016
Natrix astreptophora — KINDLER et al. 2017
Natrix astreptophora — ESCORIZA 2018 
DistributionPortugal, Spain, S France

Type locality: Coruña, Galicia  
TypesSyntypes: MNHN-RA 1889.0580-0583, MNHN-RA 2012.0459 (formerly MNHN-RA 1889.0581A), collected in Galicia by Lopez Seoane. Given in literature as VLS = private collection of Víctor López Seoane (1832–1900), no longer extant; unspecified specimens were donated to MNHN, NHMUK, ZISP and other museums (fide M. Sabaj, pers. comm., 11 March 2019). 
DiagnosisDescription: Rumpf recht dick, Kopf breit. Iris älterer Tiere ziegel- bis blutrot. Lunarflecken weißlich, gelblich, grüngelblich, manchmal zusammenfließend. Fehlen alten Weibchen, auch Nuchalflecken hier stark reduziert. Occipitalflecken oft nicht vorhanden, mitunter zum Querband verschmolzen. Oberseits grau bis graugrün. Rückenzeichnung nicht ausgebildet oder aus 4-6 Fleckenreihen bestehend. Ventralia 157-171. Subcaudalia 50-79 (Kabisch 1999). 
CommentSubspecies: see also N. natrix.

Hybridization: In the French Pyrenees region, N. n. astreptophora and N. n. helvetica hybridize occasionally. N. n. astreptophora differs consistently from all other grass snakes by its reddish iris coloration and in having significantly fewer ventral scales and another skull morphology (FRITZ et al. 2012).

Distribution: see map in Pokrant et al. 2016: 10 (Fig. 6). 
  • Akman, B., Çakmak, M., & Yıldız, M.Z. 2020. On the Herpetofauna of the Central Anatolian Province of Kırıkkale (Turkey) (Amphibia; Reptilia). Acta Biologica Turcica, 33(2): 70-79
  • Escoriza D 2018. Patterns of occurrence of semi-aquatic reptiles in highly invaded Mediterranean rivers. NeoBiota 38: 23-35 - get paper here
  • Fernández-Ortín, Daniel; Gregorio Sánchez-Montes, Íñigo Martínez-Solano 2019. A catalogue of reptiles of Monfragüe National Park (Spain), with molecular characterization of populations of Blanus WAGLER, 1830 in this protected area. Basic and Applied Herpetology
  • Fritz, U., Corti, C., & Päckert, M. 2012. Mitochondrial DNA sequences suggest unexpected phylogenetic position of Corso-Sardinian grass snakes (Natrix cetti) and do not support their species status, with notes on phylogeography and subspecies delineation of grass snakes. Organisms Diversity and Evolution, 12(1), 71–80 - get paper here
  • Kindler, Carolin; Maxime Chèvre, Sylvain Ursenbacher, Wolfgang Böhme, Axel Hille, Daniel Jablonski, Melita Vamberger & Uwe Fritz 2017. Hybridization patterns in two contact zones of grass snakes reveal a new Central European snake species. Scientific Reports 7: 7378;DOI:10.1038/s41598-017-07847-9 - get paper here
  • Lopez-Seoane,Victor 1885. Identidad de Lacerta schreiberi (Bedriaga) y Lacerta viridis var. Gadovii (BOULENGER), é investigaciones herpetologicas de Galicia. La Coruña [1884]: 19 pp. - get paper here
  • Malkmus, Rudolf 1990. Reptilien und Amphibien aus der Serra de Montemuro/Portugal. Herpetofauna 12 (68): 15-20 - get paper here
  • Malkmus, Rudolf 2018. Quer durch die Serra de Montemuro. Terraria-Elaphe 2018 (5): 40-48 - get paper here
  • Pokrant, Felix; Carolin Kindler, Martin Ivanov, Marc Cheylan, Philippe Geniez, Wolfgang Böhme and Uwe Fritz 2016. Integrative taxonomy provides evidence for the species status of the Ibero-Maghrebian grass snake Natrix astreptophora. Biological Journal of the Linnean Society, DOI: 10.1111/bij.12782 - get paper here
  • Schlüter, U. 2009. Die Schlangenfauna Europas. Draco 10 (39): 4-21 - get paper here
  • Sindaco, R.; Alberto Venchi & Cristina Grieco 2013. The Reptiles of the Western Palearctic, Volume 2: Annotated Checklist and Distributional Atlas of the Snakes of Europe, North Africa, Middle East and Central Asia, with an Update to Volume 1. Edizioni Belvedere, Latina (Italy), 543 pp. - get paper here
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