species Euglesa obtusalis (Lamarck, 1818): synonymy

Cyclas obtusalis Lamarck, 1818

Lamarck, 1818. Hist. Natur. Anim. sans Vert. 5: 559.

Pisidium (Eupisidium) obtusale — Zhadin (1965), Korniushin (1998)
Pisidium (Cyclocalyx) obtusale — Clarke (1973), Falkner et al. (2001), Bank (2006), Voode (2017), Bespalaya et al. (2017)
Pisidium obtusale — Burch (1975), Kuiper et al. (1989), Korniushin et al. (2001), Taylor et al. (2007), Schultheiß et al. (2008), ... Múrria et al. (2020), Groh et al. (2020), Clewing et al. (2020), Saito et al. (2022), Clewing et al. (2022)
Pisidium (Euglesa) obtusale — Korniushin & Glaubrecht (2002)
Cyclocalyx obtusalis — Kantor et al. (2010)
Euglesa (Cyclocalyx) obtusale — Vinarski & Kantor (2016)
Euglesa obtusalis — Príe et al. (2021), Bespalaya et al. (2022), Prié et al. (2023)
Euglesa obtusale — Bespalaya et al. (2021), Kovalenkova et al. (2025)
Euglesa (s.s.) obtusalis — Bespalaya et al. (2024)

Cyclas gibba Alder, 1831

Alder, 1831. Trans. Natur. Hist. Soc. Northumbld. Durham 1: 41.

Pisidium obtusale — He & Zhuang (2013)

Cyclas ovalis Nilsson, 1832

(homonym of Cyclas ovalis Férussac, 1807)
Nilsson, 1832. Trans. Cambridge Phil. Soc. 4: ??.

Pisidium obtusale — He & Zhuang (2013)

Pisidium dubrueili Baudon, 1872

Baudon, 1872. unknown publication: 30, pl. 3, figs. 1-4.

Cyclocalyx (s.s.) dubrueili — Starobogatov et al. (2004)
Cyclocalyx dubrueili — Kantor et al. (2010)
Pisidium obtusale — He & Zhuang (2013)
Euglesa (Cyclocalyx) dubrueili — Vinarski & Kantor (2016)

Pisidium scholtzi var. lapponicum Clessin in Westerlund, 1873

(intro'd as intra-sp. of Pisidium scholtzii Clessin, 1873)
Clessin in Westerlund, 1873. Fauna Moll. Terr. Fluv. Suec. Norv. Dan. (2): 540.
Clessin, 1874. Conch. Cab. 9(3): 19.

Pisidium obtusale — Burch (1975), He & Zhuang (2013)
Cyclocalyx (s.s.) lapponicus — Starobogatov et al. (2004)
Cyclocalyx lapponicus — Kantor et al. (2010)
Euglesa (Cyclocalyx) lapponica — Vinarski & Kantor (2016)

Pisidium scholtzii Clessin, 1873

(new name for Pisidium obtusale Scholtz, 1853)
Clessin, 1873. Malak. Blatt. 20: 23, pl. 1, fig. 1.
Clessin in Westerlund, 1873. Fauna Moll. Terr. Fluv. Suec. Norv. Dan. (2): 540.
Clessin, 1874. Conch. Cab. 9(3): 18, pl. 2, figs. 1-3.

Corneocyclas (Cyclocalyx) scholtzi — Dall (1903)
Pisidium obtusale — Thiele (1934), IUCN (2011), Fauna Europaea (2012), He & Zhuang (2013)
Pisidium (Cyclocalyx) obtusale — Clarke (1973)
Pisidium (Eupisidium) obtusale — Korniushin (1998)
Cyclocalyx (s.s.) scholtzi — Starobogatov et al. (2004)
Cyclocalyx scholtzii — Kantor et al. (2010)
Euglesa (Cyclocalyx) scholtzii — Vinarski & Kantor (2016)

Pisidium obtusale var. fragilis Clessin in Westerlund, 1873

(intro'd as intra-sp. of Cyclas obtusalis Lamarck, 1818)
Clessin in Westerlund, 1873. Fauna Moll. Terr. Fluv. Suec. Norv. Dan. (2): 548.
Clessin, 1874. Conch. Cab. 9(3): 28.

Cyclocalyx (s.s.) fragilis — Starobogatov et al. (2004)
Cyclocalyx fragilis — Kantor et al. (2010)
Pisidium obtusale — He & Zhuang (2013)
Euglesa (Cyclocalyx) fragilis — Vinarski & Kantor (2016)

Pisidium obtusale magnificum Clessin in Westerlund, 1873

(intro'd as intra-sp. of Pisidium obtusale Pfeiffer, 1821)
Clessin in Westerlund, 1873. Fauna Moll. Terr. Fluv. Suec. Norv. Dan. (2): 547.
Clessin, 1874. Conch. Cab. 9(3): 27.

Cyclocalyx (s.s.) magnificus — Starobogatov et al. (2004)
Cyclocalyx magnificus — Kantor et al. (2010)
Pisidium obtusale — He & Zhuang (2013)
Euglesa (Cyclocalyx) magnifica — Vinarski & Kantor (2016)

Pisidium obtusale solidum Clessin in Westerlund, 1873

(intro'd as intra-sp. of Pisidium obtusale Pfeiffer, 1821)
Clessin in Westerlund, 1873. Fauna Moll. Terr. Fluv. Suec. Norv. Dan. (2): 548.
Clessin, 1874. Conch. Cab. 9(3): 28.

Cyclocalyx (s.s.) solidus — Starobogatov et al. (2004)
Cyclocalyx solidus — Kantor et al. (2010)
Pisidium obtusale — He & Zhuang (2013)
Euglesa (Cyclocalyx) solida — Vinarski & Kantor (2016)

Pisidium obtusalastrum Woodward, 1921

Woodward, 1921. unknown publication: ??.

Pisidium obtusale — IUCN (2011), Fauna Europaea (2012)

Galileja lapponica var. cor Starobogatov & Streletzkaja, 1967

(intro'd as intra-sp. of Pisidium scholtzi var. lapponicum Clessin in Westerlund, 1873)
Starobogatov & Streletzkaja, 1967. Trudy Zool. Inst. 42: 251.

Cyclocalyx (s.s.) cor — Starobogatov et al. (2004)
Cyclocalyx cor — Kantor et al. (2010)
Pisidium obtusale — He & Zhuang (2013)
Euglesa (Cyclocalyx) cor — Vinarski & Kantor (2016)

Euglesa (Cyclocalyx) chaunensis Prozorova, 1988

Prozorova, 1988. Zool. Zhur. 67(10): 1578, fig. 2.

Cyclocalyx (s.s.) chaunensis — Starobogatov et al. (2004)
Cyclocalyx chaunensis — Kantor et al. (2010)
Pisidium obtusale — He & Zhuang (2013)
Euglesa (Cyclocalyx) chaunensis — Vinarski & Kantor (2016)

Euglesa (Cyclocalyx) ovata Prozorova, 1988

Prozorova, 1988. Zool. Zhur. 67(10): 1579, fig. 3.

Cyclocalyx (s.s.) ovatus — Starobogatov et al. (2004)
Cyclocalyx ovatus — Kantor et al. (2010)
Pisidium obtusale — He & Zhuang (2013)
Euglesa (Cyclocalyx) ovata — Vinarski & Kantor (2016)

Euglesa (Cyclocalyx) angarensis Slugina & Starobogatov in Slugina et al., 1994

Slugina & Starobogatov in Slugina et al., 1994. Ruthenica 4(2): 136.

Cyclocalyx (s.s.) angarensis — Starobogatov et al. (2004)
Cyclocalyx angarensis — Kantor et al. (2010)
Pisidium obtusale — He & Zhuang (2013)
Euglesa (Cyclocalyx) angarensis — Vinarski & Kantor (2016)

Pisidium obtusale Brown, 1831

(reference to Cyclas obtusalis Lamarck, 1818)
Brown, 1831. Edinb. J. Nat. & Geogr. 4: 412.

Pisidium obtusale Scholtz, 1853

(reference to Cyclas obtusalis Lamarck, 1818; renamed Pisidium scholtzii Clessin, 1873)
Scholtz, 1853. Land- und Wassermoll. Schlesiens: 142. [in part]

Pisidium obtusale solidum Kantor et al., 2010

(error for Pisidium obtusale var. fragilis Clessin in Westerlund, 1873)
Kantor et al., 2010. Cat. Contin. Moll. Russia: 306.