A journey through the Amazon Middle Earth reveals Aspidoras azaghal (Siluriformes: Callichthyidae), a new species of armoured catfish from the rio Xingu basin, Brazil.

Journal of Fish Biology
Luiz F C TencattMarcelo R Britto

Abstract

Aspidoras azaghal n. sp. was discovered during a multitaxonomic scientific expedition to the remote Amazon Terra do Meio region in tributaries to the rio Xingu basin, Pará, Brazil. The new species can be promptly distinguished from its congeners by the following combination of features: (a) absence of the first dorsal-fin element; (b) parieto-supraoccipital fontanel located medially on bone; (c) absence of a longitudinal dark-brown or black stripe along flank midline; (d) ventral surface of trunk covered by clearly smaller, irregular and/or roundish platelets; (e) inner laminar expansion of infraorbital 1 well developed; (f) relatively wide frontal bone, with width equal to half of entire length; (g) absence of a thick, longitudinal conspicuous dark-brown stripe along dorsal portion of flank; and (h) poorly developed serrations on posterior margin of the pectoral-fin spine. Besides morphological evidence, the molecular analyses indicated significant differences between the new species and its congeners, with A. albater and A. raimundi as its closest species, showing 6.53% of genetic differentiation in both cases. The intraspecific molecular data revealed gene flow (peer fixation index, FST = 0.05249, P > 0.05, for the cytochrom...Continue Reading

References

Jul 1, 1995·Journal of Molecular Evolution·W J LeeT D Kocher
Nov 15, 2000·Journal of Morphology·S A Schaefer, A E Aquino
Jun 10, 2004·Molecular Phylogenetics and Evolution·Cristiane Kioko Shimabukuro-DiasFausto Foresti
Oct 11, 2005·Philosophical Transactions of the Royal Society of London. Series B, Biological Sciences·Robert D WardPaul D N Hebert
Jan 7, 2011·Nature·Markos A AlexandrouMartin I Taylor
Apr 5, 2011·Molecular Ecology·Walter SalzburgerArndt Von Haeseler
May 14, 2011·Molecular Ecology Resources·Laurent Excoffier, Heidi E L Lischer
Oct 18, 2013·Molecular Biology and Evolution·Koichiro TamuraSudhir Kumar
Nov 1, 1984·Evolution; International Journal of Organic Evolution·B S Weir, C Clark Cockerham

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