Gyraulus cf. acronicus (Férrussac, 1807)

Frolov, Pavel D., Danukalova, Guzel A. & Osipova, Eugenia M., 2018, Late Miocene molluscs of the Morskaya 2 site (Azov Sea region, Russia), Palaeontologia Electronica (a 20) 23 (1), pp. 1-32 : 16

publication ID

https://doi.org/ 10.26879/936

persistent identifier

https://treatment.plazi.org/id/03B287EF-FFF4-3205-D9B5-FE18446A858D

treatment provided by

Felipe

scientific name

Gyraulus cf. acronicus (Férrussac, 1807)
status

 

Gyraulus cf. acronicus (Férrussac, 1807) View in CoL

Figure 5.8 View FIGURE 5

1807 Planorbis acronicus Férussac , p. 105.

1964 Gyraulus acronicus (Férussac) ; Ložek, p.

188.

1998 Gyraulus (Gyraulus) acronicus (Férussac) ; Gittenberger, Janssen, Kuijper, Kuiper, Meijer, Velde and Vries, p. 151, figs. 321- 323, 363.

2002 Gyraulus (Gyraulus) acronicus (Férussac) ; Glöer, p. 270, add. 291.

2007 Gyraulus acronicus (Férussac) ; Sanko, p.

127, fig. 96.

Material. 94 specimens from layer 3.

Description. Planispiral shell (HS is 1.1-1.5 mm, average 1.26; WS is 3.6-4.0 mm, average 3.6; WS/ HS is 2.6-4, average 3.6) consists of 4-4.5 rounded whorls separated by a deep suture, increasing fast and evenly in width. Protoconch consists of 1.5 whorls. The last whorl is about twice as wide as the penultimate one. On the periphery of the last whorl there is an inflection (keel), which is located in the middle or displaced downwards. On the upper side, the whorls are sloping; the lower side is more rounded. Aperture is oval, oblique, slightly lowered, without a lip (HA is 1.1-1.6, average 1.3; WA is 1.3- 2.4, average 1.7). The shell surface is transversely striated; weak spiral lines are present.

Region of distribution and age. Pliocene – Present. Asia, Europe, America (Glöer, 2002). Late Miocene of the the northeastern Azov Sea region.

Kingdom

Animalia

Phylum

Mollusca

Class

Gastropoda

Family

Planorbidae

Genus

Gyraulus

Darwin Core Archive (for parent article) View in SIBiLS Plain XML RDF