Subscribe: RSS Podcast iTunes
wikiofthedaymasto.ai
  Buy WotD Stuff!!
Episode 1596             Episode 1598
Episode 1597

Acamptonectes
Sat, 2021-Sep-18 01:12 UTC
Length - 3:02

Direct Link

Welcome to featured Wiki of the Day where we read the summary of the featured Wikipedia article every day.

The featured article for Saturday, 18 September 2021 is Acamptonectes.

Acamptonectes is a genus of ophthalmosaurid ichthyosaur, a type of dolphin-like marine reptile that lived during the Early Cretaceous around 130 million years ago. The first specimen—a partial adult skeleton—was discovered in Speeton, England, in 1958, but it was not formally described until 2012 by Valentin Fischer and colleagues. They also recognised a partial subadult skeleton belonging to the genus from Cremlingen, Germany, and specimens from other localities in England. The genus contains the single species Acamptonectes densus; the generic name means "rigid swimmer" and the specific name means "compact" or "tightly packed".

The scientific name of the genus refers to unusual adaptations in the body of Acamptonectes that made its trunk rigid, including tightly-fitting bones in the occiput (back and lower part of the skull) and interlocking vertebral centra ("bodies" of the vertebrae), which were likely adaptations that enabled it to swim at high speeds with a tuna-like form of locomotion. Other distinguishing characteristics include an extremely slender snout and unique ridges on the basioccipital bone of the braincase. As an ichthyosaur, Acamptonectes had large eye sockets and a tail fluke. Acamptonectes was similar in morphology to the related but earlier ophthalmosaurines Ophthalmosaurus and Mollesaurus.

The discovery of Acamptonectes had significant implications for the evolutionary history of ichthyosaurs. It was long believed the generalised platypterygiine ophthalmosaurids were the only lineage of ichthyosaurs that survived into the Early Cretaceous following a mass extinction of ichthyosaurs across the Jurassic–Cretaceous boundary. As one of the first-known ophthalmosaurine ophthalmosaurids from the Early Cretaceous, the discovery of Acamptonectes provided evidence against such a mass extinction. Although the larger eyes of Acamptonectes would have made it better adapted than platypterygiines to depth diving, it was probably a generalist predator. Its teeth, which were slender and textured with longitudinal ridges, were adapted for impaling prey, which suggests it likely fed on soft, fleshy prey such as fish and squid.

This recording reflects the Wikipedia text as of 01:12 UTC on Saturday, 18 September 2021.

For the full current version of the article, see Acamptonectes on Wikipedia.

This podcast is produced by Abulsme Productions based on Wikipedia content and is released under a Creative Commons Attribution-ShareAlike License.

Visit wikioftheday.com for our archives, sister podcasts, and swag. Please subscribe to never miss an episode. You can also follow @WotDpod on Twitter.

Abulsme Productions produces the current events podcast Curmudgeon's Corner as well. Check it out in your podcast player of choice.

This has been Ivy Standard. Thank you for listening to featured Wiki of the Day.

Archive
2017:MayJunJulAugSepOctNovDec
2018:JanFebMarAprMayJunJulAugSepOctNovDec
2019:JanFebMarAprMayJunJulAugSepOctNovDec
2020:JanFebMarAprMayJunJulAugSepOctNovDec
2021:JanFebMarAprMayJunJulAugSepOctNovDec
2022:JanFebMarAprMayJunJulAugSepOctNovDec
2023:JanFebMarAprMayJunJulAugSepOctNovDec
2024:JanFebMarAprMayJunJulAugSepOctNovDec

Most Recent Episodes


Feedback welcome at feedback@wikioftheday.com.

These podcasts are produced by Abulsme Productions based on Wikipedia content.

They are released under a Creative Commons Attribution-ShareAlike 3.0 Unported License.

Creative Commons License

Abulsme Productions also produces Curmudgeon's Corner, a current events podcast.

If you like that sort of thing, check it out too!


Page cached at 2024-12-13 05:51:05 UTC
Original calculation time was 0.2804 seconds

Page displayed at 2024-12-13 06:31:28 UTC
Page generated in 0.0005 seconds