Ichthyosaura Sonnini de Manoncourt and Latreille, 1801 (An. X), Hist. Nat. Rept., 4: 310. Type species: Proteus tritonius Laurenti, 1768, by monotypy.
Hemitriton Dugès, 1852, Ann. Sci. Nat., Paris, Ser. 3, 17: 255. Type species: Triton alpestris Laurenti, 1768, by subsequent designation of Fatio, 1872, Fauna Vert. Suisse, 3: 516. Synonymy by Dubois and Raffaëlli, 2009, Alytes, 26: 51. Preoccupied by Hemitriton Van der Hoeven, 1833, Handb. Dierkd., 2: 305.
Mesotriton Bolkay, 1927, Zool. Anz., 72: 282. Type species: Triton alpestris Laurenti, 1768, by subsequent designation of Thorn, 1968, Salamand. Eur. Asie Afr. Nord: 191. Coined as a subgenus of Triton.
None noted.
Western Ukraine to southern Denmark, northern and eastern France, Belgium, Netherlands, northern Italy, and in Balkan Peninsula from western Bulgaria and Slovenia to central Greece; isolated populations in northwestern Spain; introduced in southern England.
See comment under Triturus. Weisrock, Papenfuss, Macey, Litvinchuk, Polymeni, Ugurtas, Zhao, Jowkar, and Larson, 2006, Mol. Phylogenet. Evol., 41: 855-857, recovered Mesotriton (as Triturus alpestris) as the sister taxon of Lissotriton (as the the Triturus vulgaris group). Steinfartz, Vicario, Arntzen, and Caccone, 2007, J. Exp. Zool., 308B: 139-142, found Mesotriton to form the sister taxon of a group composed of Pachytriton and Cynops (sensu lato). Schmidtler, 2004, Sekretär, 4: 10-28, suggested that Ichthyosaura Latreille, 1801, has priority over Mesotriton Bolkay, 1927. See nomenclatural discussion by Dubois and Raffaëlli, 2009, Alytes, 26: 50-51.
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