MUSSELpdb | nomainal sp. Unio ascia Hanley, 1856

	Home \| About \| Database \| Mussel of the Month \| Publications & Presentations


MUSSELpdb
	Introduction Browse d'basing


Taxonomy
	all genera Unionidae Margaritiferidae Hyriidae Etheriidae Mycetopodidae Iridinidae Species & Genus Richness by Taxonomy


Geography
	Summary North America Central America South America Afrotropics North Eurasia East Asia Australasia Species Richness & Endemism by Geography

Page last updated
Thu 3 September 2025

The Freshwater Mussels (Unionoida) of the World (and other less consequential bivalves)

FM(U)otW(aolcb) is the web version of the MUSSEL Project Database. Follow the links to browse the data or use the custom Google search field. Either way, you win!

Search the database pages:

nominal species Unio ascia Hanley, 1856

‘Benson, MS’ Hanley, 1856. Cat. Rec. Bivalve Shells, Suppl.: 385, pl. 23, fig. 20.
Type(s): LECTOTYPE MCZ_17046 (by R.I. Johnson, 1956: 106), Penang, India.

= Lens contradens

Taxonomic Opinions

+ Lens contradens (Lea, 1838), comb. nov. — Pfeiffer et al., 2021

+ Contradens contradens (Lea, 1838) — Jeratthitikul et al., 2019

= Uniandra contradens ascia (Hanley, 1856) — Brandt, 1974

= Contradens ascia (Hanley, 1856) — Haas, 1969

= Contradens ascia (Hanley) — Haas, 1952

= Ensidens (Uniandra) ascia (Hanley, 1856) — Prashad, 1932

= Contradens ascia ascia (Hanley, 1856) — Haas, 1924

+ — Simpson, 1914

= Unio ascia Hanley, 1856 — Preston, 1912

+ — Simpson, 1900

= Unio ascia Benson, MS — Hanley, 1856

"Making the world a better place, one mollusk at a time."
	The MUSSEL Project — Home Page https://musselpdb.org/. Site developed and maintained by Dan Graf & Kevin Cummings. Funded by The National Science Foundation.