Proteus ikae Jelič, Dufresnes and Jablonski, 2026

Class: Amphibia > Order: Caudata > Family: Proteidae > Genus: Proteus > Species: Proteus ikae

Proteus ikae Jelič, Dufresnes and Jablonski in Dufresnes, Monod-Broca, Jelić, Šunje, Manenti, Barzaghi, Zimić, Chouchane, Denoël, Ohler, and Jablonski, 2026, Amphibia-Reptilia, Published online ahead of print: 38. Holotype: NHMW 19975/1, by original designation. Type locality: "the coal mine of Carpano near Labin, Istria, Croatia". ZooBank Publication registration: 9EE06D32-44D5-48DB-A34E-A9BB7849433D (13 August 2026)

Proteus sketi Trontelj, Gorički, Konstanjšek, Zakšek, Delić, Bressi, Mauri, Lukić Bilela, Jalžić, and Recknagel, 2026, Nat. Sloveniae, 28: 19. Holotype: HPM 4886, by original designation. Type locality: "Cave Pincinova Jama, about 6 km NNE of Poreč, Istra, Croatia; Lat., Lon. = 45.2874, 13.6352". ZooBank Publication registration: D60B4EF9-D0CF-46C3-B015-467D6975F0E1 (24 August 2026). 

Common Names

Istrian Olm (Dufresnes, Monod-Broca, Jelić, Šunje, Manenti, Barzaghi, Zimić, Chouchane, Denoël, Ohler, and Jablonski, 2026, Amphibia-Reptilia, Published online ahead of print: 38). 

Istarska čovječja ribica (Croatian: Dufresnes, Monod-Broca, Jelić, Šunje, Manenti, Barzaghi, Zimić, Chouchane, Denoël, Ohler, and Jablonski, 2026, Amphibia-Reptilia, Published online ahead of print: 38; Trontelj, Gorički, Konstanjšek, Zakšek, Delić, Bressi, Mauri, Lukić Bilela, Jalžić, and Recknagel, 2026, Nat. Sloveniae, 28: 19).

Distribution

Associated with deep karst aquifer systems of the Istrian Peninsula and is only occasionally flushed to the surface through large karst springs. The species has been recorded from springs and wells at or near sea level, including the historic Nimfej spring and the main water source beneath the Pula Arena, situated between the Roman amphitheatre and the Adriatic coast. Most additional records originate from deep vertical caves and pits that provide access to the deeper karstic groundwater network. 

Geographic Occurrence

Natural Resident: Croatia

Endemic: Croatia

Comment

The Istra clade of Trontelj, Douady, Fišer, Gilbert, Gorički, Lefébure, Sket, and Zakšek, 2009, Freshwater Biol., 54: 737; the Istra lineage of Kostanjšek, Zakšek, Bizjak-Mali, and Trontelj, 2023, In Mallard et al. (eds.), Groundwater Ecology and Evolution. 2nd ed: 310, Recknagel, Zakšek, Delić, Gorički, and Trontelj, 2024, Mol. Ecol., 33(e16868): 1–11, and of the revisionary works of Dufresnes, Monod-Broca, Jelić, Šunje, Manenti, Barzaghi, Zimić, Chouchane, Denoël, Ohler, and Jablonski, 2026, Amphibia-Reptilia, Published online ahead of print: 1–51, and Trontelj, Gorički, Konstanjšek, Zakšek, Delić, Bressi, Mauri, Lukić Bilela, Jalžić, and Recknagel, 2026, Nat. Sloveniae, 28: 11–27, where comparative morphology, morphometrics, molecular markers (mt- and nuDNA), a dot map of the distribution, habitat, and conservation status were provided. 

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