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A new species of Peckoltia from the Upper Orinoco (Siluriformes, Loricariidae).

Armbruster JW, Lujan NK - Zookeys (2016)

Bottom Line: 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 Peckoltia vittata, but a recent molecular phylogeny found Orinoco individuals to be distantly related to Amazon Basin individuals spanning the range of Peckoltia vittata syntypes.Detailed morphological examination confirmed distinctiveness of Orinoco specimens, and found them to be diagnosable from true Peckoltia 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).

View Article: PubMed Central - HTML - PubMed

Affiliation: Department of Biological Sciences, 101 Life Sciences Building, Auburn University, AL 36849, USA.

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 Peckoltia vittata, but a recent molecular phylogeny found Orinoco individuals to be distantly related to Amazon Basin individuals spanning the range of Peckoltia vittata syntypes. Detailed morphological examination confirmed distinctiveness of Orinoco specimens, and found them to be diagnosable from true Peckoltia 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, Peckoltia 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).

No MeSH data available.


Related in: MedlinePlus

Phylogenetic relationships within the Peckoltia Clade (sensu Lujan et al. 2015), from Lujan et al. (in review). Results based on analysis of a 4293 base pair alignment consisting of two mitochondrial (16S, Cyt b) and three nuclear loci (RAG1, RAG2, MyH6). Node support values given in order as Bayesian posterior probability, maximum likelihood bootstrap and maximum parsimony bootstrap.
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Figure 1: Phylogenetic relationships within the Peckoltia Clade (sensu Lujan et al. 2015), from Lujan et al. (in review). Results based on analysis of a 4293 base pair alignment consisting of two mitochondrial (16S, Cyt b) and three nuclear loci (RAG1, RAG2, MyH6). Node support values given in order as Bayesian posterior probability, maximum likelihood bootstrap and maximum parsimony bootstrap.

Mentions: Armbruster (2008) had recognized a wide-ranging Peckoltiavittata (Steindachner, 1881) that included specimens from the Maranhão to the Madeira and upper Orinoco, but suggested that this putative range of Peckoltiavittata included multiple species. The syntype series of Peckoltiavittata itself contains specimens spanning more than 600 km of the main channel of the Amazon River, from the Xingu River to the Madeira River, making it difficult to know where one might reliably find the true Peckoltiavittata. Specimens from the Xingu, Madeira and Orinoco that were morphologically consistent with Peckoltiavittata were found to be polyphyletic in Lujan et al. (2015) and Lujan et al. (in review, Fig. 1). In addition, Peckoltiagreedoi was recognized as distinct from Peckoltiavittata by Armbruster et al. (2015; specimens of Peckoltiagreedoi were originally included among the specimens of Peckoltiavittata examined by Armbruster 2008).


A new species of Peckoltia from the Upper Orinoco (Siluriformes, Loricariidae).

Armbruster JW, Lujan NK - Zookeys (2016)

Phylogenetic relationships within the Peckoltia Clade (sensu Lujan et al. 2015), from Lujan et al. (in review). Results based on analysis of a 4293 base pair alignment consisting of two mitochondrial (16S, Cyt b) and three nuclear loci (RAG1, RAG2, MyH6). Node support values given in order as Bayesian posterior probability, maximum likelihood bootstrap and maximum parsimony bootstrap.
© Copyright Policy - creative-commons-attribution
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC4829682&req=5

Figure 1: Phylogenetic relationships within the Peckoltia Clade (sensu Lujan et al. 2015), from Lujan et al. (in review). Results based on analysis of a 4293 base pair alignment consisting of two mitochondrial (16S, Cyt b) and three nuclear loci (RAG1, RAG2, MyH6). Node support values given in order as Bayesian posterior probability, maximum likelihood bootstrap and maximum parsimony bootstrap.
Mentions: Armbruster (2008) had recognized a wide-ranging Peckoltiavittata (Steindachner, 1881) that included specimens from the Maranhão to the Madeira and upper Orinoco, but suggested that this putative range of Peckoltiavittata included multiple species. The syntype series of Peckoltiavittata itself contains specimens spanning more than 600 km of the main channel of the Amazon River, from the Xingu River to the Madeira River, making it difficult to know where one might reliably find the true Peckoltiavittata. Specimens from the Xingu, Madeira and Orinoco that were morphologically consistent with Peckoltiavittata were found to be polyphyletic in Lujan et al. (2015) and Lujan et al. (in review, Fig. 1). In addition, Peckoltiagreedoi was recognized as distinct from Peckoltiavittata by Armbruster et al. (2015; specimens of Peckoltiagreedoi were originally included among the specimens of Peckoltiavittata examined by Armbruster 2008).

Bottom Line: 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 Peckoltia vittata, but a recent molecular phylogeny found Orinoco individuals to be distantly related to Amazon Basin individuals spanning the range of Peckoltia vittata syntypes.Detailed morphological examination confirmed distinctiveness of Orinoco specimens, and found them to be diagnosable from true Peckoltia 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).

View Article: PubMed Central - HTML - PubMed

Affiliation: Department of Biological Sciences, 101 Life Sciences Building, Auburn University, AL 36849, USA.

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 Peckoltia vittata, but a recent molecular phylogeny found Orinoco individuals to be distantly related to Amazon Basin individuals spanning the range of Peckoltia vittata syntypes. Detailed morphological examination confirmed distinctiveness of Orinoco specimens, and found them to be diagnosable from true Peckoltia 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, Peckoltia 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).

No MeSH data available.


Related in: MedlinePlus