Clathrocaspia brotzkajae (Starobogatov, 1992)
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.4559932 |
persistent identifier |
https://treatment.plazi.org/id/03BF87A3-C851-FFA7-FF3D-FD0FFE8DA2B5 |
treatment provided by |
Plazi |
scientific name |
Clathrocaspia brotzkajae |
status |
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Clathrocaspia brotzkajae View in CoL (Starobogatov in Anistratenko & Prisjazhnjuk, 1992)
Fig. 8 View FIGURE 8
Pyrgula [(Caspia)] knipowitchi View in CoL [sic] (Mak.)— Logvinenko & Starobogatov 1969: 379, fig. 367(8) [non Makarov, 1938]. Caspia (Clathrocaspia) brotzkajae Starobogatov View in CoL sp. n. —Starobogatov in Anistratenko & Prisjazhnjuk 1992: 18–19, fig. 2a. Caspia brotzkajae Starobogatov View in CoL in Anistratenko et Prisjazhnjuk, 1992— Kantor & Sysoev 2006: 87, pl. 41, fig. G. Clathrocaspia brotzkajae View in CoL (Starobogatov in Anistratenko & Prisjazhnjuk, 1992)— Wesselingh et al. 2019: 69.
Type material. Holotype ( ZIN # 1 in systematic catalogue) and 74 paratypes ( ZIN collection). Four specimens labelled as paratypes of Caspia brotzkajae ( IZAN, unnumbered lot) from a late Holocene drilling borehole taken in the southern part of Odessa region, Ukraine ( Table 1 View TABLE 1 , locality 32), do not belong to that species but instead to C. knipowitschii (see there).
Type locality. Caspian Sea shores of Dagestan, Russia, at a depth of ca. 60–75 m (locality 10). The paratypes were retrieved from locality 12 close by the type locality .
Other material. 17 specimens in Starobogatov’s collection, marked as “ type material” of “ Caspia alighadzhievi ”, an unavailable catalogue name; collected in 1957 and 1960 near Derbent (Dagestan, Russia) at a depth of 60 m and in the eastern part of the middle Caspian Sea at a depth of 73 m (localities 6, 11) .
Description. Broadly ovoid shell with about 4 whorls and large body whorl (ratio of body whorl height/shell height approximately ¾). Protoconch consists of about 1.2 whorls that measure c. 400 μm, bearing irregular wrin-kles and faint spiral threads. Teleoconch covered by fine but distinct reticulate sculpture, with numerous spiral keels that are equally prominent across whorl profile and have interspaces that are approximately as wide as keels; only uppermost 1–2 keels are usually more prominent and slightly wider spaced; in some shells, uppermost keel forms weak subsutural ramp that results in slightly stepped outline. Aperture wide, sometimes laterally expanded; umbilicus covered in most shells, sometimes present as thin slit.
Remarks. Compared to other Clathrocaspia species, C. brotzkajae is more bulbous, has a larger body whorl and a more expanded aperture. Only C. logvinenkoi from the Black Sea Basin is even more bulbous but smaller.
Originally, four specimens from the Holocene of the Danube Delta, Ukraine, were attributed to that species (Anistratenko & Prisjazhnjuk 1992). These shells are more slender and have a smaller aperture; they rather resemble C. knipowitschii and are referred to this species herein. In turn, the specimen illustrated as “ Pyrgula knipowitchi ” in Logvinenko & Starobogatov (1969) from the Caspian Sea shows a very bulky shell that is highly reminiscent of and considered conspecific with Clathrocaspia brotzkajae .
In the collection of Starobogatov we found the “ holotype ” and 16 “ paratypes ” of a catalogue taxon Starobogatov named “ Caspia alighadzhievi ”. The material shows close similarities with the holotype of C. brotzkajae ( Fig. 8 View FIGURE 8 g–j, m), described from the same region, and we consider Starobogatov’s material to belong to that species.
Distribution. Known only from the Caspian Sea shores of Dagestan, Russia. No living specimens have been encountered.
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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Clathrocaspia brotzkajae
Anistratenko, Vitaliy V., Neubauer, Thomas A., Anistratenko, Olga Yu., Kijashko, Pavel V. & Wesselingh, Frank P. 2021 |
Caspia (Clathrocaspia) brotzkajae
Starobogatov 2021 |
Caspia brotzkajae
Starobogatov 2021 |
Pyrgula [(Caspia)] knipowitchi
De Cristofori & Jan 1832 |