de Prunner's Ringlet (Erebia triaria)
2021 photographs highlighted in yellow. Click on any photograph to go to an enlarged picture, or simply scroll down the page.
Triaria is sometimes superficially similar to
Piedmont Ringlet (E. meolans), but the red post-discal band on the upf is quite wide at the
costa tapering toward the lower margin. There are white-pupilled ocelli in s2-s6
and the smaller ocellus in s6 is generally present and in line with the larger
ocelli in s4 and s5.
However, meolans sometimes has an ocellus in s6 that is distinctly not aligned with
the other two.
However, meolans sometimes has an ocellus in s6 that is distinctly not aligned with the other two.
The key is the central positioning of the ocelli within the red post-discal band, including the s6 ocellus which is reasonably centred in triaria but toward the outer edge of the post-discal band in meolans. In pictures I have seen of meolans that has an ocellus in s6, the ocellus is always at the top/outer edge of the post-discal band.
In 2019 this species was reclassified as Erebia triarius. I'll give it a few years before changing the web page (and all the occurrences and links associated) as it is entirely possible that the taxonomists will change it again.
I believe this to be a male based on its behaviour of taking salts, although the upf red post-discal band is very wide on both wings, suggesting female, and T&L shows the male as having a constriction at upf s3, which 6900 clearly does not have. The ground colour is quite a light brown, or appears to be, but this may be because it was quite a dull day and the photograph had to be lightened considerably. The ocelli in s2-6 are very strong and those in s4/5 and almost fused completely (again suggesting female) and the large s6 ocellus is perfectly in line with them, the clear indicator of triaria. The external edges of the uph red post-discal marks are quite concave whereas T&L shows them as flat to convex.
|35200||M||a male with the s6 ocellus just slightly off-centre.||1400|
|26336||M||a typical triaria underside, very dark (even allowing for some wear on 26336) with a lighter area from the discal line to the margin. Enough of the forewing is visible to show the unf ocelli, mirroring the alignment on the upf.||1720|