A new species of the blind and miniature genusMicromyzonFriel and Lundberg, 1996 (Silurifomes: Aspredinidae) from the Orinoco River: describing catfish diversity using high-resolution computed tomography
| Autor: | John P. Friel, Roberto E. Reis, John G. Lundberg, Jonathan N. Baskin, Tiago Carvalho |
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| Rok vydání: | 2016 |
| Předmět: |
0106 biological sciences
Aspredinidae food.ingredient Ecology Micromyzon akamai 010607 zoology Holotype Anatomy Biology Micromyzon biology.organism_classification 010603 evolutionary biology 01 natural sciences Coracoid medicine.anatomical_structure food Neurocranium medicine Foramen Ecology Evolution Behavior and Systematics Catfish |
| Zdroj: | Proceedings of the Academy of Natural Sciences of Philadelphia. 165:37-53 |
| ISSN: | 1938-5293 0097-3157 |
| Popis: | 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. |
| Databáze: | OpenAIRE |
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