Westerlund, C.A. 1873. Fauna Molluscorum Terrestrum et Fluviatilium Sveciæ, Norvegiæ et Daniæ (2). Available electronically.
Clessin, 1872. Malak. Blatt. 19: 159.
Westerlund, 1873. Fauna Moll. Terr. Fluv. Suec. Norv. Dan. (2): 490, 515.
Type species: Cyclas calyculata Draparnaud, 1806 = Sphaerium lacustre
Westerlund, 1873. Fauna Moll. Terr. Fluv. Suec. Norv. Dan. (2): 490.
(error for Corneola Westerlund, 1873)
Westerlund, 1873. Fauna Moll. Terr. Fluv. Suec. Norv. Dan. (2): 503.
(homonym of Held, 1837 [Gastrop.])
Type species: Tellina cornea Linnaeus, 1758 = Sphaerium corneum
‘Clessin MS’ Westerlund, 1873. Fauna Moll. Terr. Fluv. Suec. Norv. Dan. (2): 529.
Type species: Tellina amnica Müller, 1774 = Pisidium amnicum
Clessin in Westerlund, 1873. Fauna Moll. Terr. Fluv. Suec. Norv. Dan. (2): 535.
(homonym of Adams & Angas, 1863 [Gastro.]; renamed Clessinia Piaget, 1913)
Type species: Pisidium obtusale Pfeiffer, 1821 = Euglesa ventricosa
Clessin in Westerlund, 1873. Fauna Moll. Terr. Fluv. Suec. Norv. Dan. (2): 532.
(homonym of Fleuriau de Belleville, 1820; Lea, 1851 [both Mollusca])
Type species: Pisidium supinum Schmidt, 1850 = Euglesa supina
Westerlund, 1873. Fauna Moll. Terr. Fluv. Suec. Norv. Dan. (2): 578.
(intro'd as intra-sp. of Mya margaritifera Linnaeus, 1758)
Clessin in Westerlund, 1873. Fauna Moll. Terr. Fluv. Suec. Norv. Dan. (2): 522.
(intro'd as intra-sp. of Cyclas rykoltii Normand, 1844)
Clessin in Westerlund, 1873. Fauna Moll. Terr. Fluv. Suec. Norv. Dan. (2): 512.
Clessin in Westerlund, 1873. Fauna Moll. Terr. Fluv. Suec. Norv. Dan. (2): 544.
Clessin, 1874. Conch. Cab. 9(3): 32, pl. 3, figs. 15-20.
Clessin in Westerlund, 1873. Fauna Moll. Terr. Fluv. Suec. Norv. Dan. (2): 548.
Clessin, 1877. Deutsche Excurs. Moll. Fauna: 520.
(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.
(intro'd as intra-sp. of Cyclas obtusalis Lamarck, 1818)
Clessin in Westerlund, 1873. Fauna Moll. Terr. Fluv. Suec. Norv. Dan. (2): 532.
Clessin, 1874. Conch. Cab. 9(3): 24, pl. 2, figs. 16-18.
Clessin in Westerlund, 1873. Fauna Moll. Terr. Fluv. Suec. Norv. Dan. (2): 540.
Clessin, 1874. Conch. Cab. 9(3): 19.
(intro'd as intra-sp. of Pisidium scholtzii Clessin, 1873)
Clessin in Westerlund, 1873. Fauna Moll. Terr. Fluv. Suec. Norv. Dan. (2): 547.
Clessin, 1874. Conch. Cab. 9(3): 27.
(intro'd as intra-sp. of Pisidium obtusale Pfeiffer, 1821)
Clessin in Westerlund, 1873. Fauna Moll. Terr. Fluv. Suec. Norv. Dan. (2): 533.
Clessin, 1874. Conch. Cab. 9(3): 18, pl. 20-21.
(intro'd as intra-sp. of Pisidium parvulum Clessin in Westerlund, 1873)
Clessin in Westerlund, 1873. Fauna Moll. Terr. Fluv. Suec. Norv. Dan. (2): 553.
Clessin, 1874. Conch. Cab. 9(3): 17, pl. 1, figs. 17-21.
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.
(new name for Pisidium obtusale Scholtz, 1853)
Clessin in Westerlund, 1873. Fauna Moll. Terr. Fluv. Suec. Norv. Dan. (2): 548.
Clessin, 1874. Conch. Cab. 9(3): 28.
(intro'd as intra-sp. of Pisidium obtusale Pfeiffer, 1821)
Clessin in Westerlund, 1873. Fauna Moll. Terr. Fluv. Suec. Norv. Dan. (2): 536.
Clessin, 1874. Conch. Cab. 9(3): 15.
(intro'd as intra-sp. of Tellina henslowana Sheppard, 1825)
Clessin in Westerlund, 1873. Fauna Moll. Terr. Fluv. Suec. Norv. Dan. (2): 542.
(intro'd as intra-sp. of Pisidium subtruncatum Malm, 1855)
Westerlund, 1873. Fauna Moll. Terr. Fluv. Suec. Norv. Dan. (2): 578.
(intro'd as intra-sp. of Mya margaritifera Linnaeus, 1758)
Clessin in Westerlund, 1873. Fauna Moll. Terr. Fluv. Suec. Norv. Dan. (2): 508.