de Prunner's Ringlet (Erebia triaria)

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2016 photographs highlighted in green. Click on any photograph to go to an enlarged picture, or simply scroll down the page.

6900_male_Alpes-Maritimes_10Jun07 35200_male_Alpes-Maritimes_3Jun14 26336_male_Alpes-Maritimes_05Jul11

Triaria is sometimes superficially similar to the 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.

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.
ref sex

observations

alt. m
6900 M

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.

1875
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

 

6900_male_Alpes-Maritimes_10Jun07

 

35200_male_Alpes-Maritimes_3Jun14

 

26336_male_Alpes-Maritimes_05Jul11