[Taxacom] Iapyx vs. Japyx (etc.) in Diplura

[Thomas Pape]

Tony:
Haliday (1864) used only the spelling "Iapyx" and is explicit on both spelling and etymology, which means that a lapsus can be ruled out.
The spelling "Japyx" must therefore have been introduced by a later author either as an incorrect emendation or as an incorrect subsequent spelling.

The distinction has some importance as an incorrect emendation would take specific date and authorship and be a junior synonym. An incorrect subsequent spelling that is in prevailing usage and is attributed to the publication of the original spelling is to be preserved and the spelling is deemed to be a correct original spelling (Code Art. 33.3.1).

I can see that the issue of selecting among the two spellings goes back in time at least to Paclt (1952), who wrote: "So darf z. B. ... ein ursprünglicher Iapyx durch keinen Japyx ersetz werden". Senckenbergiana 33: 358.  [I couldn't find Paclt's work online and got this quote from the footnote shown here: https://www.biodiversitylibrary.org/page/53220317#page/265/mode/1up]

I share Geoff's impression that "Japyx" is in prevailing usage, but the decision on when to invoke "prevailing usage" is subjective. The definition of prevailing usage used in our Code Glossary is:
"Of a name: that usage of the name which is adopted by at least a substantial majority of the most recent authors concerned with the relevant taxon, irrespective of how long ago their work was published. "

/Thomas


-----Original Message-----
From: Taxacom <taxacom-bounces at mailman.nhm.ku.edu> On Behalf Of Tony Rees via Taxacom
Sent: 11. april 2020 08:54
To: taxacom <taxacom at mailman.nhm.ku.edu>
Subject: [Taxacom] Iapyx vs. Japyx (etc.) in Diplura

Dear Taxacomers,

In the Hexapod class (formerly order) Diplura, two forms of the genus name Iapyx Haliday, 1864 are in current use, namely Iapyx and Japyx, same for the family names based on this genus (Iapygidae/Japygidae); Japyx can perhaps be construed either as a lapsus, a subsequent emendation, or a legitimate correction; the name was originally published as

Haliday, A.H. 1864. *Iapyx,* a new genus of insects belonging to the stirps Thysanura, in the order Neuroptera.
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 *24*: 441-447 .

In the absence of an ICZN ruling on the matter, are there any rules or precedents to decide which spelling is preferable to use, and/or the technically "correct" one?

Regards - Tony

Tony Rees, New South Wales, Australia
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