Corydoras bethanae -A new arc-striped species of Corydoras from Peru

[lfinley58]

REBECCA FRANCES BENTLEY, STEVEN GRANT & LUIZ FERNANDO CASERTA TENCATT. 2021. A new arc-striped species of Corydoras Lacépède, 1803 (Teleostei: Callichthyidae) from the Peruvian Amazon. Zootaxa, Volume 4948, Number 2: 184-200.
Abstract:
A new Corydoras is described from the Blanco and Ucayali river basins in Peru. The new species can be distinguished from its congeners by having the following features: (I) posterior margin of dorsal-fin spine with laminar serrations directed towards the origin of the spine; (II) a long, wide, arched, and continuous black stripe, which runs parallel to the dorsal profile of the body, extending at least from the region below anterior origin of dorsal fin to the anterior half of the ventral caudal-fin lobe; (III) a black stripe transversally crossing the eye, forming the typical mask-like blotch; mask clearly not fused to arched stripe in most specimens; some specimens with mask separated from arched stripe by a thin line around the suture between neurocranium (in the region composed by the posteroventral margin of parieto-supraoccipital plus the posterodorsal margin of the compound pterotic) and first dorsolateral body plate; (IV) posterior margin of pectoral-fin spine with laminar serrations directed towards the origin of the spine; (V) pointed snout, presenting a long mesethmoid, with anterior tip larger than 50% of the entire length of the bone; and (V) ventral surface of trunk covered by small, non-coalescent platelets. A discussion on the possible positive adaptive value of the arc-striped color pattern is also provided.

https://www.mapress.com/j/zt/article/vi ... a.4948.2.2

[bekateen]

What's the name?

[lfinley58]

Hi Eric and all.
Sorry, I don't have the name at hand or I would have added it to the post. It is interesting that some authors will put the name of a new species in the abstract of a paper while others, as in this case, do not. I won't have access to the full paper until later today so I can be of no help on this at the current time. Maybe someone in the U.K or E.U can add it to the post prior to that. I did do a quick web look, but could find no other mention of the paper as of about 15 or 20 minutes ago.
Lee

[bekateen]

Zootaxa never does, or so it seems.

But I have learned it's

CW006

.

[lfinley58]

Hi again Eric,
Thanks for filling in some information (CW number) on the new species. I did find a nice photo of the fish (with no species name) on the Zootaxa Twitter site. The pic, which will no doubt be in the paper, can be seen at the link below.
https://twitter.com/Zootaxa/status/1372 ... axa.4948.2

Lee

[bekateen]

I find Zootaxa's Twitter pic peculiar in that the specimen chosen seems be marked with an arc that (in the photo) appears virtually continuous from the snout to the tail, and yet the narrative description emphasizes an incomplete arc, either separated from or at least weakly attached to an eye mask. This pic is not what I would envision as being representative. (Maybe it's the camera angle ?) https://twitter.com/Zootaxa/status/1372 ... 91040?s=09

Luiz confirmed for me that the Twitter pic is not the new species but is

Corydoras(ln8sc4) arcuatus

. Apparently the authors used this photo for contrast against cw006, but the Zootaxa Twitter people used it instead of cw006.

Cheers, Eric

[lfinley58]

Hi Eric,
Thanks for the follow-up information...an interesting situation with the twitter picture. In the abstract is does say mask "...clearly not fused to arched stripe in most specimens [my emphasis added];...", so it does lead to some confusion. And if one of the authors says it is not the new species then it must be so.

If you connected with one of the authors did you get a species name that can be added herein?
Lee

[Jools]

Unconfimred (I've not read the paper), but C. bethanae I think.

Jools

[lfinley58]

Hi Jools and all.

Jools: Thanks for the head's up on the potential name for this new species. You do usually have your finger on the pulse of such things.

A little note re my next to last posting regarding the photograph that was published on the Zootaxa Twitter site:
This picture was well used by the journal and, in a smaller format, appears on the Zootaxa Archives page, the Volume and Issue page and the Abstract page. A shame, in that Eric had found out that it was not the new species being described. Of course, no name is given on the picture, but there is at least a bit of association by proximity involved.

Lastly, only one day to go...Happy Spring to all at PC!

Lee

[lfinley58]

Hi all,
One more quick note regarding this topic: I am assuming that there are not too many Steven Grant's with an interest in Corydoras out there. So, it should be noted that the second author of the paper is a time to time contributor to PC...under the name The Dark One, I believe. Maybe he can make a comment or two on the topics brought up in this thread...??

Lee

[bekateen]

Indeed, Steve says on FB that it's named after his daughter. But still I don't see the specific epithet writtenout to confirm Jools' spelling.

Cheers, Eric

[bekateen]

Rebecca confirmed Jools' name.

Corydoras(ln8sc4) bethanae

[lfinley58]

Hi Eric,
Thanks for coming up with the confirmation on the name of the new Corydoras. The family relationship of Corydoras/Grant grows! There is the recently described C. granti of course (named to honor Steve), and now a species has been named to honor his daughter. And, back in 1998 Steve described C. kanei in honor of his son Kane. Corydoras is very much a family affair with the Grants.
Lee

[Jools]

Or, Corydoradinae, if you are one of those who restricts Corydoras to being the big snouty brusiers found in lineage 1...

Grant is also my middle name, just need to work on the other two!

Jools

[lfinley58]

Hello Julian Grant Dignall.

You make a very good point...but I am still of the "Corydoras" school until formality is added to the no doubt needed reorganization of "the genus". Even part of it being formally published (probably the only way to go) will make for very interesting (and enjoyable) reading!

Lee

[The.Dark.One]

Hi Lee, Jools, Eric

Yes, it's The Dark One involved in the paper lol.

When kanei was published Bethan wasn't born. She was born about a week later.

As a father of two children it never sat right with me to have named a species after one if them.

Nearly 24 years later, I managed to put that right with the help of my friends
Regards
TDO

[lfinley58]

Hi Steve,
Thanks for dropping in on the thread...it is only fitting that you should at least do a guest appearance. Congrats on being part of the team that produced an interesting and enjoyable paper.

Lee

[The.Dark.One]

Thanks Lee. I hope you are well