Journal Article
A journey through the Amazon Middle Earth reveals Aspidoras azaghal (Siluriformes: Callichthyidae), a new species of armoured catfish from the rio Xingu basin, Brazil
Tencatt, L.F.C., Muriel-Cunha, J., Zuanon, J., Ferreira, M.F.C. and Britto, M.R.
Record Number:
5165
Year:
2020
Journal:
Journal of Fish Biology
Pages:
1072-1086
Volume:
97
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 darkbrown
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 cytochrome oxidase I (COI)
marker and FST = -0.01466, P > 0.05, for the control region) between specimens
upstream and downstream from a 30-m height waterfall at the type-locality, which
therefore represent a single population. Furthermore, it was possible to observe a
unidirectional gene flow pattern, with genetic diversity increasing in the downstream
direction.
KEYWORDS
Amazon basin, Aspidoradini, corydoradinae, Serra do Pardo, taxonomy
Times Cited:
2
Relevent Species:
Related Records:
Reis, R.E. (1998)
Anatomy and phylogenetic analysis of the neotropical callichthyid catfishes (Ostariophysi, Siluriformes)
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Trajano, E. (2003)Ecology and ethology of subterranean catfishes
Britto, M. (2003)Phylogeny of the subfamily Corydoradinae Hoedeman, 1952 (Siluriformes: Callichthyidae), with a definition of its genera
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Shimabukuro-Dias, C.K, Oliveira, C., Reis, R.E. and Foresti, F. (2004)Molecular phylogeny of the armored catfish family Callichthyidae (Ostariophysi, Siluriformes)
Britto, M.R., Lima, F.C.T. and Santos, A.C.A. (2005)A new Aspidoras (Siluriformes: Callichthyidae) from rio Paraguaçu basin, Chapada Diamantina, Bahia, Brazil
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Tencatt, L.F.C., Muriel-Cunha, J., Zuanon, J., Ferreira, M.F.C. and Britto, M.R. (2020)A journey through the Amazon Middle Earth reveals Aspidoras azaghal (Siluriformes: Callichthyidae), a new species of armoured catfish from the rio Xingu basin, Brazil
Tencatt, L.F.C., Muriel-Cunha, J., Zuanon, J., Ferreira, M.F.C. and Britto, M.R. (2020)A journey through the Amazon Middle Earth reveals Aspidoras azaghal (Siluriformes: Callichthyidae), a new species of armoured catfish from the rio Xingu basin, Brazil
Tencatt, L.F.C., Britto, M.R., Isbrücker, I.J.H. and Pavanelli, C.S. (2022)Taxonomy of the armored catfish genus Aspidoras (Siluriformes: Callichthyidae) revisited, with the description of a new species
Tencatt, L.F.C., Britto, M.R., Isbrücker, I.J.H. and Pavanelli, C.S. (2022)Taxonomy of the armored catfish genus Aspidoras (Siluriformes: Callichthyidae) revisited, with the description of a new species