II sidorella hainesii (Tryon, 1866)

Disclaimer This genus is in need of revision, as the species concepts we have used have not been rigorously tested. Unpublished molecular data indicate that the species units we are here using appear to be justified, however they are not accompanied by clear-cut morphological characters that allow separation based on shell

I sidorella hainesii - living Distribution of I sidorella hainesii. I sidorella hainesii (adult size up to 21.5 mm) characters alone. As the species units appear to be overall concordant with state boundaries, we have used these boundaries to delimit species. This situation is not ideal and can only be resolved by additional molecular and morphological studies involving dense sampling. Diagnostic features Shell of about 4-5 whorls, with fine spirals and axials and periostracal hairs. Not umbilicate. Reaches about 21 mm in length, but usually around 15 mm. Classification I sidorella hainesii (Tryon, 1866) Common name: HaineĘs pouch snail Class I nfraclass Megaorder Order Lymnaeida Superfamily Family Subfamily: Miratestinae Genus I sidorella Tate, 1896 Original name: Physa (I sidora) hainesii Tryon, 1866. Tryon, G.W. (1866). Descriptions of new and exotic fresh-water . American Journal of Conchology, 2: 8-11. Synonyms: Physa inflata A. Adams & Angas, 1864 (preoccupied); Physa subinflata Sowerby, 1874; Physa crebriciliata Tenison Woods, 1878; Physa pilosa Tenison Woods, 1878; Physa brazieri Smith, 1882; Physa brazieri pallida Smith, 1882; Physa brazieri major Smith, 1882; rubida Tate, 1882; ?Physa contorta Clessin, 1886; Physa ciliosa Clessin, 1886; Physa hirsuta Hedley 1917; I sidora newcombi hedleyi Clench, 1926; I sidorella brazieri parludia redale, 1944; I sidorella brazieri ludia redale, 1944; I sidorella montana redale, 1943; I sidorella moola redale, 1943; I sidorella rubida Cotton, 1947. Biology and ecology On aquatic vegetation in ponds, billabongs, swamps and sluggish streams and rivers. Locally common. Feeds on algae and detritus. Egg mass a round to oval jelly containing several (up to 35 eggs). Development direct. Distribution Victoria and eastern South Australia, New South Wales and southern Queensland. Notes This species differs from I . newcombi in having the narrow umbilicus covered by the lower part of the inner lip and the shell is less globose. Both species sometimes have fine spiral granulose striae but, unlike I . newcombi (which sometimes has them developed on the shell), I . hainesii only has these developed on the periostracum. Some forms of spp. are very similar to I sidorella species but the penial apparatus has a penial stylet and an accessory flagellum. I sidorella lacks a stylet and an accessory structure but the penis has two lobes. This genus is in need of revision, as the species concepts we have used have not been rigorously tested and can only be resolved by additional molecular and morphological studies involving dense sampling.

Further reading Cotton, B. C. (1943). More Australian freshwater shells. Transactions of the Royal Society of South Australia 67: 143-148. Gabriel, C. J. (1939). The freshwater Mollusca of Victoria. Memoirs of the National Museum of Victoria 11: 100-139. Hubendick, B. (1955). Phylogeny of the Planorbidae. Transactions of the Zoological Society of London 28: 453-542. Shea, M. (1995). Freshwater molluscs of Sydney. Australian Shell News 88: 4-6. 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. Smith, B. J. & Kershaw, R. C. (1979). Field guide to the non-marine Molluscs of South-eastern Australia. Canberra, A.N.U. Press. Walker, J. C. (1988). Classification of Australian buliniform planorbids (Mollusca: ). Records of the Australian Museum 40: 61-89.

To cite this resource: Ponder, W. F., Hallan, A., Shea, M. and Clark, S. A., Richards, K., Klungzinger, M., and Kessner, V. 2020. Australian Freshwater Molluscs. https://keys.lucidcentral.org/keys/v3/freshwater_molluscs/

To contact the authors for comment or suggestions, please email: [email protected] Copyright © 2020. All rights reserved. The Australian Museum.