This species is the most similar to P. etheridgei, but differs in having a very thin hinge plate, parallel cardinal teeth, and its outer lateral teeth are shorter than the inner. However, these characters vary considerably - according to Korniushin (2000). It reaches 4.3 mm in length.
Euglesa kosciusko (Iredale, 1943)
Common name: Pea shell, pea clam, pill clam
Class Bivalvia
Infraclass Heteroconchia
Cohort Heterodonta
Megaorder Neoheterodontei
Order Sphaeriida
Superfamily Sphaerioidea
Family Sphaeriidae
Subfamily: Sphaeriinae
Genus Euglesa Jenyns, 1832 (Type species: Euglesa henslowiana Jenyns, 1832 (= Pisidium personatum Malm, 1855) (also sometimes cited as Tellina pusilla Gmelin, 1791)
Original name: Glacipisum kosciusko Iredale, 1943. In Iredale, T. (1943). A basic list of the freshwater Mollusca of Australia. Australian Zoologist 10: 188 - 230.
Type locality: Blue Lake, Mt. Kosciusko, New South Wales.
This species lives in lakes, creeks, and pools in alpine NSW down to 26m depth in glacial lakes according to Kuiper (1983). Its biology is poorly known. Suspension and deposit feeder.
Alpine areas of southern NSW.
Korniushin, A. V. (2000). Review of the family Sphaeriidae (Mollusca: Bivalvia) of Australia, with the description of four new species. Records of the Australian Museum 52: 41-102.
Kuiper, J. G. J. (1983). The Sphaeriidae of Australia. Basteria 47: 3-52.
Lamprell, K. & Healy, J. (1998). Bivalves of Australia, volume 2. Leiden, Backhuys Publishers.
Lee, T. (2019). Sphaeriidae Deshayes, 1855 (1820). Pp. 197-201 in C. Lydeard & Cummings, K. S. Freshwater Mollusks of the World: a Distribution Atlas. Baltimore, John Hopkins University Press.
Lee, T. & Ó Foighil, D. (2003). Phylogenetic structure of the Sphaeriinae, a global clade of freshwater bivalve molluscs, inferred from nuclear (ITS-1) and mitochondrial (16S) ribosomal gene sequences. Zoological Journal of the Linnean Society 137: 245-260.
Smith, B. J. (1992). Non-marine Mollusca. Pp. i-xii, 1-408 in W. W. K. Houston. Zoological Catalogue of Australia, 8. Canberra, Australian Government Publishing Service.
