Hyla intermedia Boulenger, 1882

Class: Amphibia > Order: Anura > Family: Hylidae > Subfamily: Hylinae > Genus: Hyla > Species: Hyla intermedia

Hylaria variegata Rafinesque, 1814, Specchio Sci., 2, 2: 103. Types: Not designated and not known to exist. Neotype, by subsequent designation of Nascetti, Lanza, and Bullini, 1995, Amphibia-Reptilia, 16: 225, MZUF 20365. Type locality: "comune nei giardini vicino Palermo e Monreale", Sicily, Italy. Neotype from "the wood called Bosco della Ficuzza, about 10 km by air NE of Corleone (Palermo; ca. 37° 00′ N - 14° 20′ E), altitude about 1000 m". Secondary homonym of Rana variegata Bonnaterre, 1789 (= Hyla leucophyllata).

Hyla arborea var. intermedia Boulenger, 1882, Cat. Batr. Sal. Coll. Brit. Mus., Ed. 2: 381. Syntypes: BMNH 1852.12.11.55 (Bononia) and 1882.7.13.6 (Palermo); BMNH 1882.7.13.6 designated lectotype by Dubois, 1995, Dumerilia, 2: 67. Type locality: "Bononia" and "Palermo, Sicily", Italy; restricted to "Palermo" by lectotype designation. Synonymy by Dubois, 1995, Dumerilia, 2: 55–71.

Hyla intermedia — Herón-Royer, 1890, Bull. Soc. Zool. France, 15: 209.

Hyla italica Nascetti, Lanza, and Bullini, 1995, Amphibia-Reptilia, 16: 225. Replacement name for Hylaria variegata Rafinesque, 1814. Synonymy with Hyla intermedia by Dubois, 1995, Dumerilia, 2: 55–71.

Hyla (Hyla) intermedia — Fouquette and Dubois, 2014, Checklist N.A. Amph. Rept.: 331, by implication. 

Hyla perrini Dufresnes, Mazepa, Rodrigues, Brelsford, Litvinchuk, Sermier, Lavanchy, Betto-Colliard, Blaser, Borzée, Cavoto, Fabre, Ghali, Grossen, Horn, Leuenberger, Phillips, Saunders, Savary, Maddalena, Stöck, Dubey, Canestrelli, and Jeffries, 2018, Bull. Soc. Vaudoise Sci. Nat., 97: 7. Holotype: MZL 42340, by original designation. Type locality: "Piazzogna, canton of Ticino, Switzerland (46.1361°N, 8.8206°E)". Zoobank publication registration: 8601B626-BDFC-4D2B-B0F0-37DF71482BCD. Invalid description according to Speybroeck, Beukema, Dufresnes, Fritz, Jablonski, Lymberakis, Martínez-Solano, Razzetti, Vamberger, Vences, Vörös, and Crochet, 2020, Amphibia-Reptilia, 41: 150. 

Hyla perrini Dufresnes, Mazepa, Rodrigues, Brelsford, Litvinchuk, Sermier, Lavanchy, Betto-Colliard, Blaser, Borzée, Cavoto, Fabre, Ghali, Grossen, Horn, Leuenberger, Phillips, Saunders, Savary, Maddalena, Stöck, Dubey, Canestrelli, and Jeffries, 2018, Frontiers Ecol. Evol., 6 (144): 12. Holotype: MZL 42340, by original designation. Type locality: "Piazzogna, canton of Ticino, Switzerland (46.1361°N, 8.8206°E)". Zoobank publication registration: C446334C-3D94-4820-A851-99BD95084F6D

Hyla intermedia perrini — Speybroeck, Beukema, Dufresnes, Fritz, Jablonski, Lymberakis, Martínez-Solano, Razzetti, Vamberger, Vences, Vörös, and Crochet, 2020, Amphibia-Reptilia, 41: 150. 

Common Names

Italian Tree Frog (Arnold, 2002, Rept. Amph. Eur., Ed. 2: 78).

Po’s Tree Frog (Hyla perrini: original publication). 

Perrin's Tree Frog (Hyla perrini: Dufresnes, 2019, Amph. Eur., N. Afr., & Middle East: 63). 

Distribution

Po Plain and adjacent valleys in northern Italy and south into Sicily, presumably in San Marino, north into the Swiss canton of Ticino, and east into Slovenia. 

Geographic Occurrence

Natural Resident: Italy, Slovenia, Switzerland

Likely/Controversially Present: San Marino

Introduced: Netherlands

Comment

In t Dufresnes, Berroneau, Dubey, Litvinchuk, and Perrin, 2020, Sci. Rep. (Nature, London), 10 (5502): 1–10, discussed the genetics of the contact zones with adjacent species. he Hyla arborea group of Faivovich, Haddad, Garcia, Frost, Campbell, and Wheeler, 2005, Bull. Am. Mus. Nat. Hist., 294: 102 (see comment under Hyla). See Dubois, 1995, Dumerilia, 2: 55–71, for extended discussion of nomenclature. Lanza, 1983, Guide Reconoscimento Spec. Animali, Anf. Rett.: 110–113, discussed this species as Hyla arborea. Arnold, 2002, Rept. Amph. Eur., Ed. 2: 74–75, provided a brief account, figure, and map. Rosso, Castellano, and Giacoma, 2004, Ital. J. Zool., 71: 169–173, reported on the advertisement call. Canestrelli, Cimmaruta, and Nascetti, 2007, Mol. Ecol., 16: 4808–4821, reported on molecular phylogeography. Stöck, Dubey, Klütsch, Litvinchuk, Scheidt, and Perrin, 2008, Mol. Phylogenet. Evol., 49: 1019–1024, reported on molecular phylogenetics and noted that it is composed of two distinctive subclades. See detailed account for Italy by Lapini, 2007, in Lanza et al. (eds.), Fauna d'Italia, 42 (Amph.): 333–338. See comments by Speybroeck, Beukema, and Crochet, 2010, Zootaxa, 2492: 7, on the evidence of cryptic taxa within this nominal species. Grosse, 2011, Laubfrösche: 1–286, reviewed the biology of the species. Ambrogio and Mezzadri, 2014, Girini d'Italia–Tadpoles of Italy: 49–52, provided an account of the morphology and natural history of the tadpoles  in Italy. Dufresnes, Dubey, Ghali, Canestrelli, and Perrin, 2015, Conserv. Genetics, 16: 1507–1513, reported on introgressive hybridization of an introduced populations with Hyla arborea in western Switzerland. Gvoždík, Canestrelli, García-París, Moravec, Nascetti, Recuero, Teixeira, and Kotlík, 2015, Mol. Phylogenet. Evol., 83: 143–155, reported on molecular phylogenetics and biogeography. Speybroeck, Beukema, Bok, and Van Der Voort, 2016, Field Guide Amph. Rept. Brit. Eur.: 158–159, provided a brief account and range map. Speybroeck, Beukema, Bok, and Van Der Voort, 2016, Field Guide Amph. Rept. Brit. Eur.: 162–164, provided a brief account and range map. Dufresnes, Mazepa, Rodrigues, Brelsford, Litvinchuk, Sermier, Lavanchy, Betto-Colliard, Blaser, Borzée, Cavoto, Fabre, Ghali, Grossen, Horn, Leuenberger, Phillips, Saunders, Savary, Maddalena, Stöck, Dubey, Canestrelli, and Jeffries, 2018, Frontiers Ecol. Evol., 6 (144): 1–18, reported on the molecular phylogeography of the species, resulting in the northern (Po Valley) population being recognized as Hyla perrini, with which it hybridizes on the northeastern edge of the Apennines in Emilia Romagna. See Dufresnes, 2019, Amph. Eur., N. Afr., & Middle East: 62, for brief summary of identifying morphology and biology, a range map, as well as a photograph. Dufresnes, Berroneau, Dubey, Litvinchuk, and Perrin, 2020, Sci. Rep. (Nature, London), 10 (5502): 1–10, discussed the genetics of the contact zone with Hyla perrini. Kuijt, Osk, den Boer, Dufresnes, France, Gilbert, de Visser, Struijk, and Wielstra, 2023, Amphibia-Reptilia, 44: 1–10, detected Hyla intermedia in the coastal dunes of the Netherlands and discussed the conservation implications. 

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