Euthria dellabellai, Harzhauser & Landau, 2024

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 : 69-70

publication ID	https://doi.org/10.11646/zootaxa.5427.1.1
publication LSID	lsid:zoobank.org:pub:923206B0-E8C5-4FD5-B882-55009ABB0282
DOI	https://doi.org/10.5281/zenodo.10841125
persistent identifier	https://treatment.plazi.org/id/03CE9F1C-FFDE-0C02-FF65-FDABE85EFE2A
treatment provided by	Plazi (2024-03-19 21:17:48, last updated 2024-03-19 21:37:23)
scientific name	Euthria dellabellai
status	sp. nov.

Treatment

Euthria dellabellai nov. sp.

Figs 36A–D View FIGURE 36

Fusus Puschi Andr. —Hörnes 1853: 282 (pars) [non Euthria puschii ( Andrzejowski, 1830) ].

Fusus (Euthria) puschi Andr. —Hoernes & Auinger 1890: 259 (pars) [non Euthria puschii ( Andrzejowski, 1830) ].

Euthria (Euthria) puschi (Andrzejowski) View in CoL — Schultz 1998: 68, pl. 27, fig. 3 [non Euthria puschii ( Andrzejowski, 1830) ].

Type material. Holotype: NHMW 1872 View Materials /0005/0027a, SL: 53.9 mm, MD: 26.7 mm, Grund ( Austria), Figs 36A View FIGURE 36 1 – A View FIGURE 1 2 View FIGURE 2 ; Paratypes: NHMW 1872 View Materials /0005/0027b, SL: 52.5 mm , MD: 29.8 mm, Grund ( Austria) , Figs 36B View FIGURE 36 1 –B View FIGURE 1 2 View FIGURE 2 ; NHMW 1872 View Materials /0005/0027c, SL: 46.9 mm , MD: 23.4 mm, illustrated in Schultz (1998: pl. 27, fig. 3), Grund ( Austria) , Figs 36C View FIGURE 36 1 –C View FIGURE 1 2 View FIGURE 2 ; NHMW 1872 View Materials /0005/0027d, SL: 47.7 mm , MD: 25.5 mm, Grund ( Austria) , Figs 36D View FIGURE 36 1 –D View FIGURE 1 2 View FIGURE 2 ; NHMW 1851 View Materials /0002/0044, Grund ( Austria) . NHMW 2023 View Materials /0342/0001, SL: 48.1 mm , MD: 25.2 mm, Grund ( Austria) , Figs 36E View FIGURE 36 1 –E View FIGURE 1 2 View FIGURE 2 .

Additional material. 2 spec., NHMW 1872 View Materials /0005/0027e, Grund ( Austria) ; 8 spec., NHMW 1860 View Materials /0001/0228, Mikulov ( Czech Republic) .

Type locality. Grund ( Austria), North Alpine-Carpathian Foreland Basin .

Type stratum. Silty clay of the Grund Formation.

Age. Middle Miocene, early Badenian (Langhian).

Etymology. In honor of Giano Della Bella ( Italy), in recognition for his contributions on Mediterranean Neogene malacology.

Diagnosis. Medium-sized, inflated ovate shell with conical spire, weakly incised suture and faint shoulder with low, widely spaced tubercles on last three whorls, columella and outer lip smooth, siphonal canal moderately short, recurved, deeply notched.

Description. Medium-sized, inflated ovate shell with conical spire, consisting of up to seven teleoconch whorls; apical angle 60–65°. Protoconch poorly preserved, high conical of about two convex whorls. Early teleoconch whorls with very broad, weakly concave subsutural ramp, weakly angled shoulder placed short distance above suture, most of whorl below covered by subsequent whorl. Sculpture of low, inconspicuous, widely spaced, axial ribs, overrun by indistinct spiral cords, two more prominent spirals placed at periphery and close above abapical suture. On second and third teleoconch whorls axials weaken and become wider spaced, fading thereafter. Weak primary spiral cords and indistinct secondaries on early teleoconch whorls fading on last two spire whorls. Later spire whorls with very broad, flat to faintly concave subsutural ramp and weak shoulder placed below mid-whorl bearing low, widely spaced, tubercles. Suture weakly incised. Last whorl high, attaining ~75% of total height, ovate, smooth except for 12–13 low, widely spaced tubercles placed along weakly angled shoulder; base moderately constricted with weak, widely spaced spiral cords; fasciole indistinct. Aperture wide, ovate. Columella broadly excavated, weakly angled at transition to siphonal canal. Columellar callus forming indistinct rim, poorly delimited from base, smooth. Anal canal weakly incised, without parietal and anal denticles. Outer lip not thickened, smooth within. Siphonal canal moderately short, wide, deflected to the left, strongly recurved, deeply notched.

Discussion. This species was confused with Euthria puschii ( Andrzejowski, 1830) by Hörnes (1853), Hoernes & Auinger (1890) and Schultz (1998). They differ in the more inflated shape and weaker spiral sculpture of Euthria dellabellai nov. sp. and the presence of lirae inside the outer lip in E. puschii . In addition, E. puschii has stronger tubercles at the shoulder and stronger spiral sculpture. Euthria gallica Peyrot, 1928 , from the Early Miocene of the Aquitaine Basin, differs in its much slenderer outline, higher spire and prominent spiral sculpture on the last whorl and base ( Peyrot 1928: pl. 5, figs 1–2).

Paleoenvironment. At the locality Grund fossiliferous channel fills, which formed in middle to outer neritic environments bear allochthonous assemblages uniting coastal-mudflat faunas with inner neritic ones ( Zuschin et al. 2005; Roetzel 2009). Preservation the fossil shells, suggest, that Euthria dellabellai belonged to the allochthonous shallow water fauna and not to the autochthonous deep-water fauna.

Distribution in Central Paratethys. Badenian (Middle Miocene): North Alpine-Carpathian Foreland Basin: Grund ( Austria) (hoc opus). Vienna Basin: Mikulov ( Czech Republic) (hoc opus).

References

Andrzejowski, A. (1830) Notice sur quelques coquilles fossiles de Volhynie, Podolie etc. Bulletin de la Societe Imperiale des Naturalistes de Moscou, 2 / 1, 90 - 104. [https: // www. biodiversitylibrary. org / item / 124281 # page / 94 / mode / 1 up]

Peyrot, A. (1928) Conchologie neogenique de l'Aquitaine. Actes de la Societe Linneenne de Bordeaux, 79, 207 - 465, pls. 5 - 14. [https: // www. biodiversitylibrary. org / page / 48879155]

Roetzel, R. (2009) Erlauterungen zu Blatt 23 Hadres. Geologische Karte der Republik Osterreich 1: 50000. Geologische Bundesanstalt, Wien, 150 pp.

Schultz, O. (1998) Tertiarfossilien Osterreichs. Goldschneck-Verlag, Weinstadt, 159 pp.

Zuschin, M., Harzhauser, M. & Mandic, O. (2005) Influence of size-sorting on diversity estimates from tempestitic shell beds in the Middle Miocene of Austria. Palaios, 20 / 2, 142 - 158. [https: // www. jstor. org / stable / 27670323] https: // doi. org / 10.2110 / palo. 2003. p 03 - 87

Figures

FIGURE 1. Measurements for shell morphology; AA: apical angle, SL: shell length, MD: maximum diameter, LWH: last whorl height, AH: aperture height, AL: aperture length, AW: aperture width.

FIGURE 2. Colubraria subobscura (Hoernes & Auinger, 1884). A1–A3. NHMW 1854/0035/0170, paralectotype, Lăpugiu de Sus (Romania). B1–B2. NHMW 1859/0037/0018a, paralectotype, Lăpugiu de Sus (Romania). C1–C3. NHMW 1865/0001/0183, paralectotype, Lăpugiu de Sus (Romania). D1–D2. NHMW 1859/0037/0018b, paralectotype, Lăpugiu de Sus (Romania). E1–E3. NHMW 1874/0025/0021, lectotype, Lăpugiu de Sus (Romania). F1–F2. NHMW 2023/0338/0001, paralectotype, Lăpugiu de Sus (Romania).

FIGURE 36. Euthria dellabellai nov. sp., A1–A2. NHMW 1872/0005/0027a, holotype, Grund (Austria). B1–B2. NHMW 1872/0005/0027b, paratype, Grund (Austria). C1–C2. NHMW 1872/0005/0027c, paratype, Grund (Austria). D1–D2. NHMW 1872/0005/0027d, paratype, Grund (Austria).