Boreaspis - Devonian Agnathan Vertebrate скачать в хорошем качестве

Boreaspis - Devonian Agnathan Vertebrate

Hi, welcome to Enchiridion. Boreaspis was an osteostracan agnathan vertebrate that lived in the Devonian period. At least 14 distinct species of Boreaspis are known from Early Devonian sandstones in Spitsbergen. Nonetheless, some of these likely do not belong to the genus. For instance, the species Boreaspis robusta and Boreaspis costata have been reassigned to Spatulaspis; and Boreaspis circinus, Boreaspis curtirostris, and Boreaspis gracilis now belong to Dicranaspis. They differ in the length of the bony spine that grew out from the cheek area on either side and in the width of their triangular-shaped head shields. The snout was elongated in all species into a blade-like rostrum. Their head shields were quite small, at 0.79 inches, or 2 cm long. It also had two pointed extensions that protruded from the base to the sides, increasing hydrodynamic efficiency. Beside its hydrodynamic function, the rostrum was possibly used to probe on the muddy lagoon floor for prey. Boreaspis means “Boreas shield”. It was named by Stensio in 1927. It belongs to the kingdom Animalia, the Phylum Chordata, the Class Osteostraci, Order Benneviaspidida, Family Boreaspididae, and Genus Boreaspis. Species include the type, which is Boreaspis rostrata, and other species like Boreaspis batoides, macrorhynchus, intermedia, ceratops, puella, spinicornis, and triangularis. It may have been a detritivore. It was 5 inches, or 13 cm long. It has been found in Spitsbergen, Svalbard, Northern Norway, Europe. It lived during the Pragian to Emsian of the Early Devonian, roughly 410 to 393 million years ago. Fossil representation includes numerous individuals. Thank you for watching. I’m slowly creating more videos on unknown and obscure species because I plan to make a collection of most of the key species in Earth’s evolutionary history. We could even create 3-D models and “go back in time” in a Virtual Reality experience. These videos serve as the guides to learning more about the prehistoric creatures, bizarre and weird, that lived eons ago. I’m very excited to make this idea a reality! As always, this is Enchiridion, see you next time! #Enchiridion #PrehistoricBeasts #Boreaspis Table of Contents: 0:00 - Introduction 0:10 - Description 1:08 - Naming 1:11 - Named By 1:14 - Scientific Classification 1:27 - Species 1:45 - Diet 1:47 - Size 1:50 - Known Locations 1:55 - Time Period 2:03 - Fossil Representation 2:07 - Outro _____ Image and Video Sources: Icons from Flat Icon Boreaspis Art and Related Work by Masato Hattori and Pinterest Audio Source: Walking with Dinosaurs OST, 11 - Jurassic Forest Sources: Palmer, D., & Cox, B. (1999). The Marshall illustrated encyclopedia of dinosaurs and prehistoric animals: A comprehensive, colour guide to over 500 species. London: Marshall Pub. Boreaspis, facts: Picture - BOREASPIS HABITAT. (n.d.). Retrieved February 12, 2021, from https://www.rareresource.com/Boreaspi... Boreaspis. (2019, November 15). Retrieved February 12, 2021, from https://en.wikipedia.org/wiki/Boreaspis Boreaspis. (n.d.). Retrieved February 12, 2021, from https://www.wikidata.org/wiki/Q4944799 Www.prehistoric-wildlife.com, D. (n.d.). Boreaspis. Retrieved February 12, 2021, from http://www.prehistoric-wildlife.com/s...