Pseudomegachasma

Nowadays, Pseudomegachasma is a widely discussed topic in society. For years, Pseudomegachasma has been the subject of interest and debate in different areas, generating conflicting opinions and positions. Throughout history, Pseudomegachasma has had a significant impact on people's lives, influencing the way they think, act and relate to their environment. In this article, we will explore the different facets of Pseudomegachasma, analyzing its importance and the implications it has on our daily lives. Knowing more about Pseudomegachasma will allow us to better understand its scope and how we can positively address it in our daily lives.

Pseudomegachasma
Temporal range:
Scientific classification Edit this classification
Domain: Eukaryota
Kingdom: Animalia
Phylum: Chordata
Class: Chondrichthyes
Subclass: Elasmobranchii
Division: Selachii
Order: Lamniformes
Family: Odontaspididae
Subfamily: †Johnlonginae
Genus: †Pseudomegachasma
Shimada, 2015
Species

P. casei
P. comanchensis

Pseudomegachasma ("false megamouth") is an extinct genus of filter-feeding shark that was closely related to the modern sand tiger shark. It is known from Cretaceous strata in Russia and the United States, and is the only known planktivorous odontaspid, as well as the oldest known planktivorous elasmobranch. It most likely derived from its closest relative, the piscivorous shark Johnlongia. As its name suggests, it was originally classified under Megachasma, before it was found to be an odontaspid.[1]

References

  1. ^ Shimada, Kenshu; Popov, Evgeny V.; Siversson, Mikael; Welton, Bruce J.; Long, Douglas J. (September 3, 2015). "A new clade of putative plankton-feeding sharks from the Upper Cretaceous of Russia and the United States". Journal of Vertebrate Paleontology. 35 (5): e981335. Bibcode:2015JVPal..35E1335S. doi:10.1080/02724634.2015.981335. ISSN 0272-4634. S2CID 83793715.


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