New Micromyzon species (Aspredinidae)
Posted: 02 Jan 2017, 15:55
A new species of the blind and miniature genus Micromyzon Friel and Lundberg, 1996 (Silurifomes: Aspredinidae) from the Orinoco River:
describing catfish diversity using high-resolution computed tomography.
Author(s): Tiago P. Carvalho, John G. Lundberg, Jonathan N. Baskin, John P. Friel, Roberto E. Reis.
Source: Proceedings of the Academy of Natural Sciences of Philadelphia, 2016, 165(1):37-53.
ABSTRACT.—A new species of the aspredinid catish 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; ossifed 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-in 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 hoplomyzontini.
describing catfish diversity using high-resolution computed tomography.
Author(s): Tiago P. Carvalho, John G. Lundberg, Jonathan N. Baskin, John P. Friel, Roberto E. Reis.
Source: Proceedings of the Academy of Natural Sciences of Philadelphia, 2016, 165(1):37-53.
ABSTRACT.—A new species of the aspredinid catish 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; ossifed 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-in 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 hoplomyzontini.