Hyaloscala rustica, Harzhauser & Landau, 2025
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publication ID |
https://doi.org/10.11646/zootaxa.5630.1.1 |
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publication LSID |
lsid:zoobank.org:pub:89462472-D932-4255-880F-C6EF15220A31 |
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persistent identifier |
https://treatment.plazi.org/id/03D787A4-FFB0-FFB2-FF3F-FB87FF609469 |
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treatment provided by |
Plazi |
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scientific name |
Hyaloscala rustica |
| status |
sp. nov. |
Hyaloscala rustica sp. nov.
Figs 28L View FIGURE 28 , 32D–F View FIGURE 32
Type material. Holotype, NHMW 2024 View Materials /0278/0007, SL: 6.8 mm, MD: 3.2 mm, Bad Vöslau ( Austria), Figs 28L View FIGURE 28 , 32D View FIGURE 32 1 –D View FIGURE 1 2 View FIGURE 2 . Paratypes, NHMW 2024 View Materials /0278/0008, SL: 4.8 mm , MD: 2.4 mm, Bad Vöslau ( Austria), Figs 32E View FIGURE 32 1 –E View FIGURE 1 2 View FIGURE 2 . NHMW 2024 View Materials /0278/0009, SL: 4.8 mm , MD: 2.7 mm, Bad Vöslau ( Austria), Fig. 32F View FIGURE 32 .
Type locality. Bad Vöslau ( Austria), Vienna Basin .
Type stratum. Baden Formation.
Age. Middle Miocene, middle Badenian (Langhian).
Etymology. Rusticus (Latin for rustic), referring to the crude sculpture.
Diagnosis. Small, moderately broad conical shell with strongly convex whorls, slightly inflated last whorl and prominent axial sculpture of broadly rolled over lamellae, obliquely aligned axially, fused across suture, sub-angled base, ovate aperture.
Description. Shell small, moderately broad conical (apical angle 25–29°). Protoconch and early teleoconch whorls unknown. Teleoconch of at least six strongly convex whorls with weakly concave subsutural ramp, rounded shoulder, periphery placed mid-whorl. Suture deeply impressed, fenestrate. Sculpture of prominent, moderately raised, slightly prosocline lamellae, obliquely aligned axially, separated by wider interspaces (?: ~14/17: ~14/17), adapical tips faintly alate, fused across suture. Crests of lamellae strongly rolled over, resulting in broad varix-like appearance of lamellae. Interspaces smooth. Last whorl slightly inflated, attaining about 45% of total height with sub-angled base, lamellae strongly rolled over on base, very broad. Fasciole short, broad, with prominent growth lines. Aperture ovate, columella nearly straight. Columellar callus forming narrow rim, attached to fasciole and base. Parietal callus weak. Basal lip slightly widened. Peristome moderately thickened, duplex; inner layer covering outer layer largely. No umbilicus.
Discussion. Hyaloscala rainesi nov sp. is smaller than Hyaloscala rustica sp. nov. and differs in its faintly coronate shoulder. Hyaloscala occidentalis sp. nov. has a comparable outline but more numerous and weaker lamellae. The extant Hyaloscala arcanum ( DuShane, 1979) , from California, is relatively stouter and has fewer lamellae (see DuShane 1979: fig.1; Weil et al. 1999: fig. 457). Hyaloscala melior ( Melvill & Standen, 1903) , from the Persian Gulf, has weaker and more widely spaced lamellae (see Melvill & Standen 1893: pl. 7, fig. 9; Weil et al. 1999: fig. 410).
Some species of Sodaliscala , like the extant Sodaliscala multicostata ( Sowerby, 1844) from the Indo-West Pacific, are quite similar but have distinct spiral cords ( Kilburn 1985; figs 129–130; Weil et al. 1999: fig. 331). Interspaces in Hyaloscala species are usually smooth, and if they have spiral sculpture, it is much finer or fainter than in Sodaliscala species.
Paleoenvironment. Occurrences in the Baden Formation of the Vienna Basin suggest middle to outer neritic settings in up to 250 m water depth ( Kranner et al. 2021).
Distribution in Central Paratethys. Badenian (Middle Miocene): Vienna Basin: Bad Vöslau ( Austria) (hoc opus).
| MD |
Museum Donaueschingen |
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