Xanthodisca Aurivillius, 1925, Aurivillius, 1925

Cock, Matthew J. W., Congdon, T. Colin E. & Collins, Steve C., 2016, Observations on the biology of Afrotropical Hesperiidae (Lepidoptera). Part 9. Hesperiinae incertae sedis: Zingiberales feeders, genera of unknown biology and an overview of the Hesperiinae incertae sedis, Zootaxa 4066 (3), pp. 201-247: 219

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Xanthodisca Aurivillius, 1925


Xanthodisca Aurivillius, 1925  

This genus was introduced by Aurivillius (1925) for Astictopterus vibius Hewitson   and Pamphila rega Mabille   , which at that time was considered a subspecies of vibius   . Up until then, vibius   had been treated as a species of Pardaleodes   , and Evans (1937) considered Xanthodisca   to be closely allied to Pardaleodes   . Evans added two species to the genus: Pardaleodes astrape   from West and central Africa and Pamphila ariel Mabille   , a Madagascan endemic. Carcasson (1981) and Ackery et al. (1995) treated X. vibius   and X. rega   as distinct species, and Larsen (2005) confirmed that they overlap in distribution in Cameroon.

The late T.B. Larsen (pers. comm. 2015) re-examined the members of the genus, and concluded that X. ariel   probably belongs to one of the Madagascan endemic genera ( Perrotia   or Miraja   ), whereas astrape   is not related to any other genus, so he planned to describe new genus to hold it. The food plants of ariel   are unknown but Larsen suggests they will be found to be bamboos, whereas X. vibius   and X. rega   feed on Aframomum   spp. ( Zingiberaceae   ) and X. astrape   feeds on Marantaceae   , and is treated below in the section on Marantaceae   feeders. Contrary to what Aurivillius (1925) and Evans (1937) thought, Xanthodisca   is not closely related to Pardaleodes   , a grass-feeding genus treated in Cock & Congdon (2014), rather it shows clear affinities with the other Zingiberaceae-feeders treated here, especially Semalea   (above).