Cylindriscala bellissima, 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-FFDC-FFDD-FF3F-FED7FA2693ED |
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treatment provided by |
Plazi |
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scientific name |
Cylindriscala bellissima |
| status |
sp. nov. |
Cylindriscala bellissima sp. nov.
Figs 4C View FIGURE 4 , 20G View FIGURE 20 1 –G View FIGURE 1 2 View FIGURE 2 , 21D View FIGURE 21
Type material. Holotype, NHMW 2013 View Materials /0078/0155, SL: 5.6 mm, MD: 1.8 mm, Baden ( Austria), Figs 4C View FIGURE 4 , 20G View FIGURE 20 1 –G View FIGURE 1 2 View FIGURE 2 , 21D View FIGURE 21 .
Type locality. Baden ( Austria), Vienna Basin .
Type stratum. Baden Formation.
Age. Middle Miocene, middle Badenian (Langhian).
Etymology. Superlative of bellus (Latin for beautiful); referring to the aesthetic appearance of the species.
Diagnosis. Small, slender, turreted, glossy shell with rounded shoulder, constricted below, with deeply impressed suture and very prominent, convex axial ribs, no spiral sculpture, prominent, rounded peribasal cord, aperture ovate with duplex peristome.
Description. Shell small, slender, turreted (apical angle ~15°). Protoconch incomplete, last two whorls turreted, weakly convex, smooth. Teleoconch of seven strongly convex whorls, with weakly convex, shallow subsutural ramp, periphery at rounded shoulder placed distinctly above mid-whorl, constricted below. Suture deeply impressed, weakly undulating. Sculpture of moderately widely spaced, very prominent, convex, orthocline to weakly prosocline axial ribs, not aligned axially (11: 10: 10), most prominent along periphery, only slightly weakening over subsutural ramp. Interspaces of about equal width to ribs, smooth, glossy. Last whorl attaining ~33% of total height, three axial ribs of last whorl forming slightly more prominent varices, marked basal angulation without continuous peribasal cord but with row of blunt nodes formed by axial ribs terminating at basal angulation, base weakly concave, smooth. Aperture ovate, columella weakly concave. Outer lip strongly thickened by terminal varix. Columellar and parietal callus forming continuous, narrow rim, detached from base. Peristome duplex. Umbilicus reduced to narrow chink.
Discussion. The extant Cylindriscala acus ( Watson, 1883) differs in its greater number of axial ribs and evenly convex whorls (see Bouchet & Warén 1986: fig 1236–1237; Weil et al. 1999: fig. 82). Similarly, Cylindriscala aurantina ( Bouchet & Warén, 1986) , from the Azores, has evenly convex to somewhat subcylindrical whorls and differs in its narrower peribasal cord (see Bouchet & Warén 1986: fig 1242; Weil et al. 1999: fig. 83).
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 ( 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.