Taxacom: Family Chilodontidae - unresolved homonym in Characiformes and Gastropoda? - now solved

[Tony Rees]

I have found out that Fowler's (now "unjustified") emendation of the fish
family Chilodidae to Chilodontidae dates from 1950, so post-dates
Chilodontidae Wenz, 1938 in Mollusca which is presumably why the latter
name is unaffected and is thus an available name; Chilodontidae in Pisces
should therefore arguably be listed as a new name authored by Fowler, 1950
although it is not so in the ICZN Opinion title which reads:

ICZN. (2024). Opinion 2502 (Case 3555) ? Chilodontidae Bronn, 1859
(Ciliophora), Chilodontinae Eigenmann, 1910 (Pisces, Characiformes) and
Chilodontinae Wenz, 1938 (Mollusca, Gastropoda): homonymy between
family-group names resolved.

At present I am keeping my entry for the fish family name in IRMNG as
"Chilodontinae
Eigenmann, 1910" in IRMNG (since that is how I originally acquired it,
based on Eschmeyer's Catalog and elsewhere) but could change it if this is
now considered an incorrect attribution...

Regards - Tony


On Wed, 18 Jun 2025 at 10:37, Tony Rees <tonyrees49 at gmail.com> wrote:

> Thanks, Francisco for that clarification. I was thinking that suppressed
> names automatically then qualify as unavailable but, as you say, the two
> concepts are not equivalent. I will ensure that my IRMNG records are
> updated so as to be correct in this respect.
>
> Best regards - Tony
>
> On Wed, 18 June 2025, 10:25?am Francisco Welter-Schultes via Taxacom, <
> taxacom at lists.ku.edu> wrote:
>
>> Dear Tony,
>>
>> The statement "Chilodontidae Bronn, 1859 (Ciliophora) is now
>> unavailable" should be incorrect - a name once available remains so
>> (Art. 10.6) unless the Commission has ruled otherwise.
>> Art. 11.7.1 states that a family-group name must meet the criteria "when
>> first published". When the name was established in 1859 the genus-group
>> name was not suppressed. Art. 11.7.1.5 does not come into effect here.
>>
>> Chilodontidae Bronn, 1859 was suppressed, but not ruled to be
>> unavailable. The Commission does usually not rule names to be unavailable.
>>
>> Best wishes
>> Francisco
>>
>> Am 18.06.2025 um 01:37 schrieb Tony Rees via Taxacom:
>> > Dear all,
>> >
>> > Just an update on my 2010(!) thread started at
>> > https://lists.ku.edu/pipermail/taxacom/2010-April/116226.html
>> >
>> > Recently (2024) ICZN have produced a ruling on this issue (and case
>> > submitted in 2011), namely (as I understand it):
>> >
>> > - Chilodontidae Eigenmann, 1910 (not 1903 as previously given) in
>> Pisces is
>> > ruled to be an unjustified emendation (by Fowler, unsure what date) of
>> > Chilodidae Eigenmann, 1910, not a justified one as previously given, so
>> the
>> > correct name for this fish family is now Chilodidae (the ICZN ruling
>> > actually deals with these names at the level of subfamily)
>> >
>> > - Chilodontidae Wenz, 1938 in Mollusca is therefore ruled to be not
>> > preoccupied, so the proposed replacement name Chilodontaidae (e.g. as
>> used
>> > in Bouchet et al., 2017) is no longer required (again dealt with at the
>> > level of subfamily)
>> >
>> > - Chilodontidae Bronn, 1859 (Ciliophora) is now unavailable since its
>> type
>> > genus, Chilodon Ehrenberg, 1834 is now suppressed for priority (I have
>> that
>> > as replaced by Chilodonellidae Deroux, 1970. in IRMNG, hopefully that is
>> > correct).
>> >
>> > I believe the above to be correct although I only have access to the
>> > abstract, not the full text of the relevant Opinion, which is available
>> at
>> > https://nam10.safelinks.protection.outlook.com/?url=https%3A%2F%2Fdoi.org%2F10.21805%2Fbzn.v81.a025&data%7C02%7Ctaxacom%40lists.ku.edu%7Cab364c50b24d4c86be9608ddae366180%7C3c176536afe643f5b96636feabbe3c1a%7C0%7C0%7C638858270781978050%7CUnknown%7CTWFpbGZsb3d8eyJFbXB0eU1hcGkiOnRydWUsIlYiOiIwLjAuMDAwMCIsIlAiOiJXaW4zMiIsIkFOIjoiTWFpbCIsIldUIjoyfQ%3D%3D%7C0%7C%7C%7C&sdata=BTTjvp4ZCTYv5BnoDYncsNA1s5hdtsLq0chwhVHtQc4%3D&reserved=0 . I am happy of course to hear
>> any
>> > additional information or corrections RE my understanding as given
>> above.
>> >
>> > Sometimes the wheels of taxonomy grind more slowly than we might wish,
>> but
>> > this one got there in the end, it seems...
>> >
>> > Regards to all - Tony
>> >
>> > Tony Rees, New South Wales, Australia
>> > https://nam10.safelinks.protection.outlook.com/?url=https%3A%2F%2Fabout.me%2FTonyRees&data%7C02%7Ctaxacom%40lists.ku.edu%7Cab364c50b24d4c86be9608ddae366180%7C3c176536afe643f5b96636feabbe3c1a%7C0%7C0%7C638858270782014027%7CUnknown%7CTWFpbGZsb3d8eyJFbXB0eU1hcGkiOnRydWUsIlYiOiIwLjAuMDAwMCIsIlAiOiJXaW4zMiIsIkFOIjoiTWFpbCIsIldUIjoyfQ%3D%3D%7C0%7C%7C%7C&sdata½oE91mFRE4uT8NEz4AtRUWbmu03tCmEVdmJsXtDF2w%3D&reserved=0
>> > https://nam10.safelinks.protection.outlook.com/?url=http%3A%2F%2Fwww.irmng.org%2F&data%7C02%7Ctaxacom%40lists.ku.edu%7Cab364c50b24d4c86be9608ddae366180%7C3c176536afe643f5b96636feabbe3c1a%7C0%7C0%7C638858270782039348%7CUnknown%7CTWFpbGZsb3d8eyJFbXB0eU1hcGkiOnRydWUsIlYiOiIwLjAuMDAwMCIsIlAiOiJXaW4zMiIsIkFOIjoiTWFpbCIsIldUIjoyfQ%3D%3D%7C0%7C%7C%7C&sdata=S%2Ft6SxdK70eM%2F07x7OIEZQ%2FFiNsocA5pkTMii%2FjA5RI%3D&reserved=0
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