Taxacom: Question to botanical experts RE ICNafp Code - rank changes for descriptive names, with changed termination

[Tony Rees]

Hi Ken, that is an interesting suggestion, that I would have to look
further into before formulating a response - but others (more expert than
me) are very welcome to comment.

FWIW my current IRMNG remarks for Aglaophyton read:
"Originally allocated to fam. Rhyniaceae, but considered distinct from that
group by later authors. Subsequently identified as the sporophyte of the
earlier described Lyonophyton W. Remy & R. Remy, 1980; the two names can
co-exist as separate form-genera, although Novikoff & Barabasz-Krasny, 2015
treat Aglaophyton as a synonym of Lyonophyton, and place the latter in its
own family Lyonophytaceae Doweld."

Presently IRMNG has Aglaophyton as unplaced in Horneophytopsida
(alternative name: Langiophytopsida), while Novikoff & Barabasz-Krasny,
2015 have Aglaophyton/Lyonophyton in fam. Lyonophytaceae in
order Lyonophytales which, together with Langiophytales, make up the
class Langiophytopsida, sole member of the Division Langiophytophyta. I can
always update IRMNG to follow this treatment if it seems preferable.

Where the "eophytes" would sit relative to this, I do not know, however
others might...

Regards - Tony

Tony Rees, New South Wales, Australia
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On Sat, 1 Apr 2023 at 09:16, Kenneth Kinman <kinman at hotmail.com> wrote:

> Dear All,
>       I wasn't going to comment on this thread, but I never liked the name
> Eophytidae and I like the name "Eophyta" even less (especially at Phylum
> level).  If you think about it, the only true "eophytes" are
> cyanophyta/cyanobacteria.
>        Anyway, since IRMNG already includes genus Aglaophyton in Class
> Horneophytopsida, which probably makes it paraphyletic, why not place
> Subclass Eophytidae in that class as well?  Then you don't have to worry
> about changing the name at all.
>                               ------------Ken Kinman
> ------------------------------
> *From:* Taxacom <taxacom-bounces at lists.ku.edu> on behalf of Tony Rees via
> Taxacom <taxacom at lists.ku.edu>
> *Sent:* Wednesday, March 29, 2023 5:00 PM
> *To:* taxacom <taxacom at mailman.nhm.ku.edu>
> *Subject:* Taxacom: Question to botanical experts RE ICNafp Code - rank
> changes for descriptive names, with changed termination
>
> Dear all,
>
> I am seeking advice as to how a descriptive name above the rank of family
> can be re-used, with a change in termination (to signify changed rank) with
> or without a change in cited authorship and/or "stat. nov." - the latter
> presumably requiring a formal publication.
>
> The name in question is Eophytidae Edwards, Morris, Axe, Duckett, Pressel &
> Kenrick, 2021, erected as a subclass within class Embryopsida, consistent
> with the treatment of land plants by Chase & Reveal, 2009, except that
> "Embryopsida" replaces the latter's "Equisetopsida".
>
> This name is erected at a similar rank to bryophytes, marchantiophytes atc.
> which are at equivalent rank i.e. subclass in the Chase & Reveal treatment.
> However in other treatments such as that of Ruggiero et al., 2015, followed
> in my own IRMNG system and elsewhere, bryyophytes, etc. are treated as
> separate phyla within Embryophyta, which is represented as a superphylum.
>
> So my requirement is to treat the "eophytes" (presently Eophytidae) as a
> separate phylum, e.g. "Eophyta", where it will sit alongside
> Anthocerotophyta, Bryophyta, Charophyta and so on. Note here, "Eophytidae"
> is a "descriptive name" per the ICNafp (not based on a genus) so falls
> under the provisions of Arts. 16 and 6.10, thus:
> -------------
> Article 16.1 Names above the rank of family
> "… descriptive names … may be used unchanged at different ranks"
> -------------
> Article 6.10 Note 3
> Note 3. A descriptive name (Art. 16.1(b)) used at a rank different from
> that at which it was first validly published is not a name at new rank
> because descriptive names may be used unchanged at different ranks.
> -------------
> So one reading of this is that Eophytidae may be recast as "Eophyta" (with
> the same circumscription) without a change of authorship, and not requiring
> a published "stat. nov.". However the alternative reading would be that a
> published change of authorship would be needed, plus a "stat. nov.", since
> although the initial portion of the name is unchanged, the termination is -
> in other words the name is not "unchanged" in the sense of Art. 16.1.
>
> Thoughts, advice appreciated.
>
> Tony Rees, New South Wales, Australia
>
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