Talk:Ischnura ezoin

Odonata of the World lists this as Ischnura ezoin, presumably on the authority of Dijkstra et al. It is still Boninagrion ezoin on the IUCN Red List.--Keith Edkins (Talk) 17:29, 19 December 2014 (UTC)

It is Ischnura ezoin, as far as I know. I have not yet been able to find the original description. It is the only species in Japan of the "rubilio group" in my personal taxonomy. Uploader1234567890 (talk) 10:29, 17 April 2024 (UTC)

I know this species from GBIF, the distribution from wikipedia's article (as boninagrion), and a few other resources but not the original description. Uploader1234567890 (talk) 10:30, 17 April 2024 (UTC)

@Uploader1234567890: It looks like since Keith Edkin's comment here 10 years ago, IUCN Red List has updated to use Ischnura ezoin instead of Boninagrion ezoin. I'm not sure why they called it Boninagrion ezoin in the first place though, since it looks like Boninagrion was synonymized with Ischnura in Insects of Micronesia volume 5 in 1962 (see page 38 of [1]), and B. ezoin, being the type species of Boninagrion, would therefore have to be included in Ischnura. (Unless this synonymy wasn't generally accepted by Odonata specialists until many years later?)

Also, as far as I can tell looking at sources such as the PDF I already linked and others such as [2], Boninagrion and Boninagrion ezoin were both originally described in the following article:

• Asahina, S. 1952. Odonata of the Bonin Islands. Mushi 23(6): 45–56.

Unfortunately this article is not available online at all to my knowledge. I'm not even sure if that is the article's original title, or an English translation of possibly a Japanese-language article. But if you're looking for the original description of Boninagrion ezoin aka Ischnura ezoin, that may help you? Monster Iestyn (talk) 23:02, 17 April 2024 (UTC)

Oh, I see... doing some more searching and reading online, it looks like scientists kept the species Boninagrion ezoin in its own genus Boninagrion after 1962, but DNA studies much later confirmed it should be included in Ischnura after all. (See for instance [3], published in 2012)

So, the English Wikipedia articles en:Boninagrion and en:Boninagrion ezoin are many years out of date now: Boninagrion should be a redirect to en:Ischnura and Boninagrion ezoin should be called Ischnura ezoin. Monster Iestyn (talk) 23:55, 17 April 2024 (UTC)