Most large succineid snails belonging to the genus Novisuccinea in the Yukon have a pinkish sole and relatively pale bodies, but along the Demster Highway, from the North Fork Pass (and apparently north), snails are very dark-bodied and a dark slate-grey-blackish sole. The change from pinkish to dark soles is surprizingly abrupt, apparently at this pass, as I stumbled upon one summer at the Yukon Bioblitz. The pass is the divide between the Yukon river drainage in the south, which flows north and west to the Bering Sea, and the Mackenzie river drainage, which flows north to the Arctic. It seems likely that these two colour forms represent separate species. But, this brings into question what names should apply to the pink and dark animals. My assumption was that the pink-soled Novisuccinea is N. strigata, but that may not be the case . . .
In June 2013, I participated in the annual New Brunswick Bioblitz, which is organized by the New Brunswick Museum. This year the two-week long bioblitz was focusing on the Grand Lake Natural Protected Area (NPA), southeast of Fredericton, NB. Check out the Bioblitz’s blog here. Next year’s bioblitz will again be in the Grand Lake NPA. Continue reading
On the orange foot of Novisuccinea ovalis
Back in September, outside of Québec city I collected a succineid. I think it is Novisuccinea ovalis (Say, 1817), although I can’t be certain. It is a succineid after all. But, in my experience, the upland habitat is quite typical for Novisuccinea. And, the sole of the foot is orange.
The orange foot isn’t much mentioned in the literature of this species but it does rather rapidly fade in preserved animals. Within a couple of weeks, the orange of my snail had faded to a drab greyish-orange, hardly the vivid colouration of the living snail.