Acrilloscala austriaca, 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-FFF6-FFF0-FF3F-F9E3FEA995D5 |
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treatment provided by |
Plazi |
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scientific name |
Acrilloscala austriaca |
| status |
sp. nov. |
Acrilloscala austriaca sp. nov.
Figs 2G View FIGURE 2 , 9A–D View FIGURE 9
Illustrated material. Holotype, NHMW 2024 View Materials /0278/0001, SL: 5.6 mm, MD: 1.8 mm, Bad Vöslau ( Austria), Figs 9D View FIGURE 9 1 –D View FIGURE 1 2 View FIGURE 2 . Paratypes, NHMW 2010 View Materials /0004/0526a, SL: 4.5mm , MD: 1.6 mm, Bad Vöslau ( Austria), Figs 9A View FIGURE 9 1 –A View FIGURE 1 2 View FIGURE 2 . NHMW 1997 View Materials z0178/0969a, SL: 5.7 mm , MD: 1.8 mm, Bad Vöslau ( Austria), Figs 2G View FIGURE 2 , 9B View FIGURE 9 1 –B View FIGURE 1 2 View FIGURE 2 . NHMW 2013 View Materials /0078/0156a, SL: 6.2 mm , MD: 2.1 mm, Baden ( Austria), Figs 9C View FIGURE 9 1 –C View FIGURE 1 2 View FIGURE 2 .
Type locality. Bad Vöslau ( Austria), Vienna Basin .
Type stratum. Baden Formation.
Age. Middle Miocene, middle Badenian (Langhian).
Etymology. Austriacus , referring to Austria.
Diagnosis. Small, turreted, slender shell with faintly angled, convex whorls, weakly raised, slightly prosocline, moderately widely spaced lamellae and delicate spiral threads, marked basal angulation with broad peribasal cord and weakly concave basal disc.
Description. Shell small, turreted, slender (apical angle ~16–18°). Protoconch unknown. Teleoconch of at least nine convex whorls, with weakly concave subsutural ramp, faintly angled below, periphery placed just below mid-whorl. Suture deeply impressed, linear. Sculpture of delicate, thin, weakly raised, slightly prosocline, moderately widely spaced lamellae, only partly axially aligned (15: 16/18: 18/19). Tips of lamellae weakly alate, attached to preceding whorl. Crests of lamellae weakly rolled over. Delicate spiral threads in axial interspaces. Last whorl attaining about 35% of total height, basal angulation with broad peribasal cord, basal disc weakly concave with distinct lamellae. Aperture ovate, columella weakly concave. Columellar callus forming narrow adherent rim. Parietal callus delicate. Peristome not preserved.
Discussion. Acrilloscala propugnaculum sp. nov. differs from Acrilloscala austriaca sp. nov. in its angled whorls, wider-spaced and lower lamellae and weaker peribasal cord. Acrilloscala terebralis ( Michelin, 1831) (= Acrilloscala degrangei De Boury in Cossmann, 1912), from the Serravallian of France, differs in its fewer but broader lamellae (see Ivolas & Peyrot 1900: pl. 2, figs 6–8; Cossmann 1912: pl. 3, figs 17–19; Cossmann & Peyrot 1922: pl. 4, figs 114–115). Scala (Acrilloscala) terebralis of Glibert (1949: pl. 11, fig. 1) is probably not conspecific with A. terebralis and is closer to the Paratethyan species in its more numerous and finer lamellae but is lower spired.
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: Baden, Bad Vöslau ( Austria) (hoc opus).
| MD |
Museum Donaueschingen |
No known copyright restrictions apply. See Agosti, D., Egloff, W., 2009. Taxonomic information exchange and copyright: the Plazi approach. BMC Research Notes 2009, 2:53 for further explanation.