Talk:Austrolittorina unifasciata

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Size

My experience of the east coast population is that they are much smaller than 10–25 mm, more like 5 mm. Quoy & Gaimard give the length as "5 lignes", about 11 mm. Also generally the spire is brown and eroded, whereas some sources and photos show it entire. There might be differences between specimens from exposed vs. sheltered locations? Also there is different usage of "banded periwinkle" vs. "blue periwinkle" or even "australwink". Wondering if we are conflating different things, or is it just variation across range and situation? Pelagic ( messages ) Z – (20:53 Sun 24, AEST) 10:53, 24 May 2020 (UTC)

This might be relevant, if I could find a copy:

McMahon, R. F., 1992. Microgeographic variation in the shell morphometrics of Nodilittorina unifasciata from southwestern Australia in relation to wave exposure of shore. In: J. Grahame, P. J. Mill & D. Reid (eds), Proceedings of the 3rd International Symposium on Littorinid Biology. The Malacological Society of London, London: 107–117. Pelagic ( messages ) Z – (23:30 Sun 24, AEST) 13:30, 24 May 2020 (UTC)