Euthria diluvii ( Eichwald, 1830 ), 1860

Harzhauser, Mathias & Landau, Bernard M., 2024, The Colubrariidae, Eosiphonidae, Melongenidae, Pisaniidae, Prodotiidae and Tudiclidae (Gastropoda, Buccinoidea) of the Miocene Paratethys Sea, Zootaxa 5427 (1), pp. 1-110 : 72-74

publication ID	https://doi.org/ 10.11646/zootaxa.5427.1.1
publication LSID	lsid:zoobank.org:pub:923206B0-E8C5-4FD5-B882-55009ABB0282
persistent identifier	https://treatment.plazi.org/id/03CE9F1C-FFDD-0C0E-FF65-F9E5E814FF7E
treatment provided by	Plazi
scientific name	Euthria diluvii ( Eichwald, 1830 )
status

Treatment

Euthria diluvii ( Eichwald, 1830)

Figs 38A–B View FIGURE 38 , 34D View FIGURE 34

* Fusus diluvii m.— Eichwald 1830: 225.

Fusus diluvii m.— Eichwald 1851: 95, pl. 8, figs 1a–b.

Fusus diluvii — Eichwald 1852: plate captions, pl. 8, figs 1a–b.

Fusus diluvii m.— Eichwald 1853: 176.

Euthria intermedia var. minor Friedb. View in CoL — Friedberg 1912: 152, pl. 9, figs 1–2 [non Euthria minor Bellardi, 1873 View in CoL ].

Euthria intermedia minor Friedberg View in CoL — Zelinskaya et al. 1968: 190, pl. 45, figs 10–11 [non Euthria minor Bellardi, 1873 View in CoL ]. Euthria intermedia Micht. var. minor Friedb. View in CoL — Friedberg 1938: 138.

Euthria friedbergi View in CoL nom. n. — Bałuk 1995: 244 [nov. nom. pro Euthria minor Friedberg, 1912 View in CoL , non Bellardi, 1873] [? pl. 34, fig. 6].

Type material. Syntype or holotype: SL: 22.5 mm, MD: 11.2 mm, specimens illustrated in Eichwald (1852: pl. 8, fig. 1), Żukowce (Zhukivtsi) ( Ukraine), probably stored in the St. Petersburg State University , Paleontological Museum , Russia, but we have not traced the material .

Illustrated material. NHMW 1860/0001/0224a, SL: 23.8 mm, MD: 10.2 mm, Boršov (= Porstendorf) ( Czech Republic), Figs 38A View FIGURE 38 1 –A View FIGURE 1 2 View FIGURE 2 . NHMW 1860/0001/0224b, SL: 18.7 mm, MD: 8.8 mm, Boršov (= Porstendorf) ( Czech Republic), Figs 38B View FIGURE 38 1 –B View FIGURE 1 2 View FIGURE 2 , 34D View FIGURE 34 .

Revised description. Small, moderately slender fusiform shell of up to six teleoconch whorls; apical angle ~45°. Protoconch broad conical of two convex whorls; diameter: 800 μm, height: 750 μm. Early teleoconch whorls with broad, prominent axial ribs, separated by narrower interspaces, overrun by three prominent spiral cords, with secondary cords intercalated on second and third teleoconch whorls. Periphery at abapical suture. Axial ribs fading on fourth teleoconch whorl; spiral sculpture persisting on later teleoconch whorls as close-set moderately prominent spiral cords, most prominent over subsutural ramp and base, subobsolete mid-whorl. Last whorl attaining ~70% of total height, subsutural ramp slightly concave, weakly delimited, broadly convex mid-whorl, base strongly constricted, fasciole indistinct.Aperture ovate. Columella broadly excavated, smooth, angled at transition to siphonal canal. Columellar callus moderately delimited, extending as narrow rim along siphonal canal, adherent in parietal region. Anal canal accentuated by weak parietal denticle. Outer lip thin, with about 12 prominent, discontinuous lirae starting some distance behind peristome, extending deep within aperture. Siphonal canal moderately long, moderately wide, deflected to the left, moderately recurved, shallowly notched.

Paratethyan synonyms. Bałuk (1995) recognized that Euthria minor Friedberg, 1912 was preoccupied by a species described by Bellardi (1973) and therefore introduced Euthria friedbergi as new name. Erroneously, Bałuk (1995) designated the specimen illustrated by Friedberg (1912: pl. 9, figs 1) as holotype, but this specimen is a lectotype according to ICZN Article 74. Lectotype: Dryszczów ( Ukraine), SL: 25.1 mm, MD: 11.1mm, illustrated in Friedberg (1912, pl. 9, fig. 1). Herein, we consider Euthria friedbergi to be a subjective junior synonym of Fusus diluvii Eichwald, 1830 .

Discussion. Friedberg (1912) emphasized axial ribs on the first four teleoconch whorls and delicate spiral threads on the spire whorls. These features are also present in the specimens illustrated herein from Boršov ( Czech Republic) and allow a separation from the otherwise similar Euthria frausseni nov. sp. and Euthria walaszczyki nov. sp. Euthria friedbergi was established as subspecies of Euthria intermedia ( Michelotti, 1847) by Friedberg (1912). The Early Miocene Italian Euthria intermedia , however, has a shorter siphonal canal and a less constricted base. Moreover, its spiral sculpture on the base comprises a characteristic succession of prominent, wide-spaced spiral cords, whereas Euthria diluvii has close-set and weaker spiral cords.

Paleoenvironment. Unknown, probably inner neritic environments.

Distribution in Central Paratethys. Badenian (Middle Miocene): Polish-Ukrainian Fore-Carpathian Basin: Dryszczów, Zborów (Zboriv), Żukowce (Zhukivtsi) ( Ukraine) ( Friedberg 1912, 1938).