A new species of Peckoltia from the Upper Orinoco

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A new species of Peckoltia from the Upper Orinoco

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A new species of Peckoltia from the Upper Orinoco (Siluriformes, Loricariidae)
Jonathan W. Armbruster, Nathan K. Lujan

Abstract

A new species of the suckermouth armored catfish genus Peckoltia is described from the lower Ventuari River, a tributary of the upper Orinoco River in Amazonas State, Venezuela. Specimens of this species were formerly included in the wide-ranging Amazonian species P. vittata, but a recent molecular phylogeny found Orinoco individuals to be distantly related to Amazon Basin individuals spanning the range of P. vittata syntypes. Detailed morphological examination confirmed distinctiveness of Orinoco specimens, and found them to be diagnosable from true P. vittata by having generally greater than 25 teeth (vs. less), spots on the nape (vs. nape lacking spots), the upper lip with two to three black bar-shaped markings in a line like a moustache (vs. lips generally with a hyaline wash), and by the snout having a medial black line disconnected from the moustache markings (vs. medial snout stripe connected to a bar just above the lip). Peckoltia wernekei displays remarkable genetic similarity to its sister species, P. lujani, but differs morphologically by having dentary tooth rows meet at an angle less than 90° (vs. >90°), by having large faint blotches on the abdomen (vs. abdomen with no blotches), by a smaller internares width (21.2–26.6% vs. 28.5–46.5% of interorbital width), and a larger dorsal spine (148.1–178.6% vs. 80.1–134.5% of abdominal length).

Keywords
Ancistrini, Hypostominae, Molecular Phylogeny, Morphology, Peckoltia, Systematics, Taxonomy

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Re: A new species of Peckoltia from the Upper Orinoco

Post by smitty »

Good news and another reason to be thankful.
150gal- No Plecos; 3 AC 110 P.Filters; 2 AC P.Heads; Eheim2217, 2260
180gal- Plecos (9): L001/L022 (1M), L023, L083/L165, L137, L190, Rhino (1M, 1F), Trinidad (2); 3 AC 110 P.Filters; 2 AC 110 P.Heads; Eheim 2217,2260; Fluval FX5
210gal- Plecos (5): L014 (2), L050; 4 AC P.Filters; 2AC P.Heads; Eheim 2250,2262; Fluval FX5;
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Re: A new species of Peckoltia from the Upper Orinoco

Post by racoll »

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Re: A new species of Peckoltia from the Upper Orinoco

Post by Acanthicus »

Hi,

the bodyshape doesnt really match L 103. What about L243?
Daniel
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Re: A new species of Peckoltia from the Upper Orinoco

Post by racoll »

I knew it had an L number. Didn't think to look in Ancistomus ...
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Re: A new species of Peckoltia from the Upper Orinoco

Post by bekateen »

@Acanthicus and @racoll, Did this ever get resolved?

Before today, Peckoltia wernekei did not yet appear in the CLOG. Based on the comments above, and reading supporting statements on other websites, for the time being I've renamed L243 as Ancistomus wernekei, and placed P. wernekei in synonymy. Or should L243 get moved into Peckoltia?

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Re: A new species of Peckoltia from the Upper Orinoco

Post by bekateen »

Hi all, was this ever resolved? Officially, this is still Peckoltia, not Ancistomus.

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Re: A new species of Peckoltia from the Upper Orinoco

Post by racoll »

Yes, definitely Peckoltia!
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Re: A new species of Peckoltia from the Upper Orinoco

Post by Jools »

I'll move it.

Jools
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