Gyraulus Charpentier 1837
Creators: name: Vinarski, Maxim V.
name: Glöer, Peter
name: Palatov, Dmitry M.
Publisher: name: Zenodo
Year: 2013
Subjects: Biodiversity
Taxonomy
Animalia
Mollusca
Gastropoda
Hygrophila
Planorbidae
Gyraulus

description: Key to the Gyraulus species of Turkey and adjacent countries of the Near East (see also Table 2)
1. Shell diameter exceeds 5 mm with 3.5–4 whorls ......................................................................................................... 2
1’. Shell diameter <5mm................................................................................................................................................... 8
2. Last whorl keeled or angled.......................................................................................................................................... 3
2’. Last whorl not keeled or angled.................................................................................................................................... 7
3. Shell height 1.0 – 1.2 mm ............................................................................................................................................. 4
3’. Shell 1.4 – 1.8 mm ........................................................................................................................................................ 5
4. Last whorl prominent and keeled, prostate with 16–18 diverticles ....................................................... G. pamphylicus
4’. last whorl not prominent, periphery angled, prostate with 9–18 diverticles ............... G. euphraticus (Mousson, 1874)
5. Shell with a prominent keel .......................................................................................................................................... 6
5’. Shell canted, last whorl prominent ................................................................................... G. argaeicus (Sturany, 1904)
6. Shell with a prominent keel and spiral ribs, ratio of D:H = 4.2 ............................ G. egridirensis Glöer et Girod, 2013
6’. Shell keeled, surface smooth, ratio of D:H = 3.8 .................................................... G. taseviensis Glöer et Girod, 2013
7. Shell with transverse and spiral ridges, diameter 4–7 mm, height 1.2–1.8 mm ................ G. albus (O.F. Müller, 1774)
7’. Shell height 1.2 mm, diameter 5 mm, surface smooth ............................................. G. hebraicus (Bourguignat, 1852)
8. Shell height <4 mm...................................................................................................................................................... 9
8’. Shell height 4–5 mm ................................................................................................................................................... 10
9. Shell surface with strong, curved transverse ridges, last whorl prominent ..................................... G. crista (L., 1758)
9’. Shell surface smooth ............................................................................................................................... G. elenae sp.n.
10. Height of the last whorl 1 mm .................................................................................................................................... 11
10’ Height of the last whorl 1.2–1.5 mm .......................................................................................................................... 12
11. Ratio D:h = 4.5, prostate with 14–19 diverticles ................................................................. G. ehrenbergi (Beck, 1837)
11’. Ratio D:h = 4.0, prostate with about 18–22 diverticles ............................................................................ G. nedyalkovi
12. Last whorl prominent .............................................................................................. G. piscinarum (Bourguignat, 1852)
12’. Last whorl not prominent............................................................................................................................................ 13
13. Vas deferens with a narrowing in the middle of the proximal part .............................................. G. parvus (Say, 1817)
13’. Vas deferens regular thin ............................................................................................................. G. laevis (Alder, 1838)
description: Published as part of Vinarski, Maxim V., Glöer, Peter & Palatov, Dmitry M., 2013, Gyraulus elenae sp. n. — a new Planorbid snail from Eastern Turkey (Mollusca: Gastropoda: Planorbidae), pp. 95-98 in Zootaxa 3664 (1) on page 98, DOI: 10.11646/zootaxa.3664.1.9, http://zenodo.org/record/283829