Journal Article

A new species of the blind and minature genus Micromyzon Friel and Lundberg, 1996 (Siluriformes: Asprendinidae) from the Orinoco River: describing catfish diversity using high-resolution computed tomography

Carvalho, T.P., Lundberg, J.G., Baskin, J.N., Friel, J.P. and Reis, R.E.

Record Number:
2966
Year:
2016
Journal:
Proceedings of the Academy of Natural Sciences of Philadelphia
Pages:
37-53
Volume:
165
PMCID:
https://doi.org/10.1635/053.165.0104
Abstract:
A new species of the aspredinid catfish tribe Hoplomyzontini Micromyzon is described from two specimens collected with trawl nets in two localities, at 10 and 18 m depth, in the main channel of the lower Orinoco River in Venezuela almost 40 years ago. The new species is distinguished from its only congener, Micromyzon akamai, by the: straight anterior margin of the mesethmoid; open posterior cranial fontanel; ossified first pectoral-fin radial; single tubular infraorbital bone; infraorbital sensory canal entering neurocranium via the frontal; enclosed foramen for the abductor superficialis muscle in the coracoid; higher vertebral count (33 vs. 28–32); higher anal-fin ray count (10 or 11 vs. 7–9); and some morphometric features. The holotype of the new species was scanned using High-Resolution X-ray Computed Tomography to illustrate, describe, and compare its bony skeleton to other hoplomyzontins.
Times Cited:
2
Relevent Species:
Micromyzon orinoco Carvalho, Lundberg, Baskin, Friel and Reis 2016Micromyzon akamai Friel and Lundberg 1996
Related Records:
Friel, J.P. (1994)
A phylogenetic study of the Neotropical banjo catfishes (Teleostei; Siluriformes: Aspredinidae)
Friel, J.P. (1994)
A phylogenetic study of the Neotropical banjo catfishes (Teleostei; Siluriformes: Aspredinidae)
Friel, J. and Lundberg, J.G. (1996)
Micromyzon akamai, Gen. et Sp. Nov., a small and eyeless banjo catfish (Siluriformes: Aspredinidae) from the river channels of the lower Amazon basin
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A new species of the blind and minature genus Micromyzon Friel and Lundberg, 1996 (Siluriformes: Asprendinidae) from the Orinoco River: describing catfish diversity using high-resolution computed tomography
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Chuctaya, J., Encalada, A.C., Barragán, K.S., Torres, M.L., Rojas, K.E., Ochoa-Herrera, V. and Carvalho, T.P. (2021)
New Ecuadorian records of the eyeless banjo catfish Micromyzon akamai (Siluriformes: Aspredinidae) expand the species range and reveal intraspecific morphological variation
Chuctaya, J., Encalada, A.C., Barragán, K.S., Torres, M.L., Rojas, K.E., Ochoa-Herrera, V. and Carvalho, T.P. (2021)
New Ecuadorian records of the eyeless banjo catfish Micromyzon akamai (Siluriformes: Aspredinidae) expand the species range and reveal intraspecific morphological variation