Prima faceva parte del Gen. Inachis, poi è passata ad Aglais (
) ma a quanto pare, il genere d'appartenenza giusto è quello iniziale, anche se nel prossimo futuro, si prospetta un passaggio al gen.Nymphalis, ed Inachis , Aglais e Polygonia diventeranno sottogeneri, almeno è quanto sostiene Balletto http://biotaxa.org/Zootaxa/article/down ... 3.1.1/9561
On the basis of molecular data (see Wahlberg et al., 2005. Biol. J. Linn. Soc., 86: 227–251; Wahlberg et al.,
2009. BMC Evolutionary Biology, 9: 92–108) and perhaps partially because the genus Inachis is
monobasic, some authors have suggested that it be lumped with Aglais Dalman, 1816 (most European
databases), or that Nymphalis include Inachis (Catalogue of Life), or even that they three of them (Inachis,
Aglais and Polygonia) collapse under Nymphalis Kluk (Funet). Only the latter of these hypotheses,
however, is fully compatible with other molecular and morphological data (Nylin et al., 2001. Zool. J.
Linn. Soc.132: 441–468), which were also derived from a much bigger dataset. Should the latter
interpretation prevail, the names Inachis, Polygonia and Aglais could be retained to designate subgenera of
Nymphalis, together with the Oriental (sub) genera Kaniska Moore, 1899 and Roddia Korshunov, 1995.
Whatever it can be, at least Inachis and Aglais have strongly divergent genitalia: the subunci are strong and
massive in Inachis and long and flexible in Aglais; the tegumen is wide and bilobate in Inachis and
anteriorly pointed in Aglais; the saccus is short in Inachis and very long in Aglais, the aedeagus is thicker
and shorter in Inachis, etc. (see also Higgins 1975: 176, 178). In the female genitalia of Aglais, the ductus
bursae is longer and distally more completely sclerotized than in Inachis. A genus derived from their
lumping would be structurally and morphologically undefinable.
The date of publication of Inachis has been fixed by the ICZN in Op. 150 (Dir. 4).
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