Ulskia ulskii
publication ID |
https://doi.org/ 10.11646/zootaxa.4933.2.1 |
publication LSID |
lsid:zoobank.org:pub:5D1D20A5-0F44-4AEF-AF5F-A758FC37D076 |
DOI |
https://doi.org/10.5281/zenodo.4559954 |
persistent identifier |
https://treatment.plazi.org/id/03BF87A3-C85F-FF96-FF3D-FC28FEB3A7BA |
treatment provided by |
Plazi |
scientific name |
Ulskia ulskii |
status |
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Ulskia ulskii View in CoL (Clessin & W. Dybowski in W. Dybowski, 1887)
Figs 16 View FIGURE 16 , 17 View FIGURE 17
Caspia Ulskii View in CoL nob.—Clessin & W. Dybowski in W. Dybowski 1887: 38–39.
[ Caspia View in CoL ] Ulskii n. sp. —W. Dybowski 1888: 79, pl. 3, fig. 8a, b.
Pyrgula [(Ulskia)] behningi Logv. et Star. View in CoL sp. n. — Logvinenko & Starobogatov 1969: 380, fig. 36713).
Pyrgula [(Ulskia)] nana Logv. et Star. View in CoL sp. n. — Logvinenko & Starobogatov 1969: 379–380, fig. 36712).
Pyrgula [(Ulskia)] ulskii (Cless. et W. Dyb.) View in CoL — Logvinenko & Starobogatov 1969: 379, fig. 36710).
Pyrgula behningi Logvinenko et Starobogatov, 1968 View in CoL — Kantor & Sysoev 2006: 97–98, pl. 45, fig. M.
Pyrgula nana Logvinenko et Starobogatov, 1968 View in CoL — Kantor & Sysoev 2006: 101, pl. 47, fig. D.
Pyrgula ulskii View in CoL (Clessin et W. Dybowski in W. Dybowski, 1888)— Kantor & Sysoev 2006: 104, pl. 45, fig. F.
Ulskia ulskii View in CoL (Clessin & W. Dybowski in W. Dybowski, 1887)— Neubauer et al. 2018: 52–54 View Cited Treatment , fig. 5A–K.
Ulskia behningi ( Logvinenko & Starobogatov, 1969) View in CoL — Wesselingh et al. 2019: 72–73 View Cited Treatment .
Ulskia ulskii View in CoL (Clessin & Dybowski in Dybowski, 1887)— Wesselingh et al. 2019: 73 View Cited Treatment .
Type material. Lectotype ( ZB-M W.Dyb. 76) and 33 paralectotypes ( ZB-M W.Dyb. 76 and 99) (designated by Anistratenko et al. 2019). The holotype of P. behningi ( ZIN #1 View Materials ) and 82 paratypes ( ZIN ##2–11) are listed in ZIN systematic catalogue, collected by B.M. Logvinenko in 26/06/1956 – 04/08/1957. As for P. nana , we found a specimen labelled as “ holotype ” in the Starobogatov collection ( ZIN), as well as 13 probable paratypes.
Type locality. “Kaspi-See” (Caspian Sea, without further details; Table 1 View TABLE 1 , locality 26). Type locality of P. behningi : Western part of the South Caspian Sea in the vicinity of the Kura River mouth, 120 m (locality 23). The paratypes were collected off Apsheron Peninsula ( Azerbaijan) (locality 14). Type locality of P. nana : western part of the Caspian Sea near Apsheron peninsula, 88 m (locality 15); the 13 probable paratypes were retrieved in the eastern part of the South Caspian Sea off Cheleken Peninsula, Turkmenistan (locality 20).
Other material. The “ holotype ” and 6 “ paratypes ” of “ Caspia clessiniolaeformis ”, an unavailable collection name coined by Starobogatov ( ZIN, no number), collected in 1957 and 1962 in the eastern part of the Middle Caspi-an Sea at a depth of 56–71 m (localities 5 and 17). Further three specimens labelled by Starobogatov as Caspia ulskii come from locality 17 ( ZIN, no number), three from Selitrennoye (locality 1, RGM 1309810 View Materials , 1309809 View Materials , 1309856 View Materials ) and five specimens from the Kura delta (localities 25d and 25f, RGM 1310306–1310310 View Materials ) .
Remarks. The characteristic features of Ulskia ulskii are the small (up to 2.15 mm in height, 1.20 mm in width), slender and usually stepped shell with a tightly coiled aperture that rarely leaves an umbilicus ( Fig. 16 View FIGURE 16 a–z), a striated–wrinkled protoconch demarcated by a distinct but not particularly bulgy growth rim ( Fig. 17 View FIGURE 17 a–o) and a teleoconch microsculpture that consists of tiny, irregular, elongated beads ( Fig. 17b, c, f, i, k, m View FIGURE 17 ).
Ulskia ulskii is a highly variable species with respect to shell shape. Neubauer et al. (2018) provided a detailed description for material from the Pleistocene of Russia ( Fig. 16t View FIGURE 16 , v–z). These specimens are more elongate and slightly larger but otherwise fit well to the lectotype series of U. ulskii . Similarly, Holocene specimens from the Kura delta tend to be more slender and have a less stepped outline ( Fig. 16 View FIGURE 16 p–s, u), but the morphological variation is fluent and does not allow establishing clear species boundaries. Rather we consider all these differences to reflect intraspecific variation .
The range of variation also covers the holotype of Pyrgula nana Logvinenko & Starobogatov, 1969 ( Fig. 16g, h View FIGURE 16 ) and P. behningi Logvinenko & Starobogatov, 1969 ( Fig. 16 View FIGURE 16 l–o), which closely resemble some of the paralectotypes of U. ulskii . We thus follow the previous opinion of Neubauer et al. (2018) and consider P. nana a junior synonym of U. ulskii ; Pyrgula behningi is a new synonym of U. ulskii .
Furthermore, we found in the ZIN collection of Starobogatov material labelled with the unavailable collection name “ Caspia clessiniolaeformis ”. The “ holotype ” and 6 “ paratypes ” of “ Caspia clessiniolaeformis ” collected in the eastern part of the Middle Caspian Sea fall in the morphological range of U. ulskii ( Fig. 16i, j View FIGURE 16 ) .
Distribution. Endemic to the Caspian Sea, reported from water depths between 45 and 170 m ( Logvinenko & Starobogatov 1969; data of ZIN catalogue). Tarasov (1996b) mentioned the species from 478 m in the South Caspian Basin.
ZIN |
Russian Academy of Sciences, Zoological Institute, Zoological Museum |
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.
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Ulskia ulskii
Anistratenko, Vitaliy V., Neubauer, Thomas A., Anistratenko, Olga Yu., Kijashko, Pavel V. & Wesselingh, Frank P. 2021 |
Ulskia behningi ( Logvinenko & Starobogatov, 1969 )
2019Pyrgula behningi
Kantor, Yu. I. & Sysoev, A. V. 2006: 97 |
Pyrgula nana
Kantor, Yu. I. & Sysoev, A. V. 2006: 101 |
Pyrgula ulskii
Kantor, Yu. I. & Sysoev, A. V. 2006: 104 |
Pyrgula [(Ulskia)] behningi Logv. et Star.
Logvinenko, B. M. & Starobogatov, Ya. I. 1969: 380 |
Pyrgula [(Ulskia)] nana Logv. et Star.
Logvinenko, B. M. & Starobogatov, Ya. I. 1969: 379 |
Pyrgula [(Ulskia)] ulskii (Cless. et W. Dyb.)
Logvinenko, B. M. & Starobogatov, Ya. I. 1969: 379 |
Caspia
Dybowski, W. 1887: 38 |