Is the Gill Skeleton of Acorn Worms (Enteropneusta) Similar to the Gill Skeleton of Amphioxus (Cephalochordata)?
| Autor: | Vladimir V. Malakhov, O. V. Ezhova |
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| Rok vydání: | 2020 |
| Předmět: |
Gills
Branchiostoma General Immunology and Microbiology biology Cephalochordata General Medicine Anatomy biology.organism_classification Biological Evolution Skeleton (computer programming) Horseshoe shape General Biochemistry Genetics and Molecular Biology Chordata Nonvertebrate Saccoglossus mereschkowskii Animals General Agricultural and Biological Sciences Phylogeny Skeleton Lancelets Saccoglossus |
| Zdroj: | Doklady Biological Sciences. 494:232-235 |
| ISSN: | 1608-3105 0012-4966 |
| DOI: | 10.1134/s001249662005004x |
| Popis: | The gill skeleton of the enteropneust Saccoglossus mereschkowskii consists of a series of tridents. The central prong of each trident bifurcates in its ventral end. The most anterior gill skeletal element has a simple horseshoe shape. Homologues of the elements of the enteropneust gill apparatus were found in the structure of the gill apparatus of Cephalochordata. The organization of the gill skeleton of Enteropneusta and Cephalochordata can be derived from the metameric horseshoe-shaped elements. The similarity of the structure of the gill skeleton of Enteropneusta and Cephalochordata contradicts a common "upside-down theory" of the origin of Chordata. |
| Databáze: | OpenAIRE |
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