Acestrus

Acestrus is an extinct genus of marine ray-finned fish that lived during the lower Eocene in Europe. It contains one species, A. ornatus from the London Clay, known from a single braincase. It is thought to possibly be closely allied with billfish based on the braincase morphology, although it remains uncertain whether it had the rostrum characteristic of billfishes. Some authorities have suggested blochiid affinities.[1][2][3][4]

The former species "A. elongatus" Casier, 1966 is now thought to be remains assigned to Duplexdens.[3]

## References

1. ↑ Cite error: Invalid `<ref>` tag; no text was provided for refs named `sepkoskidb`
2. ↑ "PBDB". https://paleobiodb.org/classic/basicTaxonInfo?taxon_no=35928.
3. ↑ 3.0 3.1 Monsch, Kenneth A. (2004). "Revision of the scombroid fishes from the Cenozoic of England" (in en). Earth and Environmental Science Transactions of the Royal Society of Edinburgh 95 (3-4): 445–489. doi:10.1017/S0263593300001164. ISSN 1755-6929. https://www.cambridge.org/core/journals/earth-and-environmental-science-transactions-of-royal-society-of-edinburgh/article/abs/revision-of-the-scombroid-fishes-from-the-cenozoic-of-england/4C0CBDC19BB39C4709617722D6FBE64C.
4. ↑ Fierstine, Harry L. (2006-11-01). "Fossil history of billfishes (Xiphioidei)". Bulletin of Marine Science 79 (3): 433–453. https://www.ingentaconnect.com/content/umrsmas/bullmar/2006/00000079/00000003/art00002.

Wikidata ☰ Q4673237 entry

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