Biology:Megachasma applegatei
| Megachasma applegatei | |
|---|---|
Scientific classification 
| |
| Domain: | Eukaryota |
| Kingdom: | Animalia |
| Phylum: | Chordata |
| Class: | Chondrichthyes |
| Subclass: | Elasmobranchii |
| Subdivision: | Selachimorpha |
| Order: | Lamniformes |
| Family: | Megachasmidae |
| Genus: | Megachasma |
| Species: | †M. applegatei
|
| Binomial name | |
| †Megachasma applegatei Shimada, Welton and Long, 2014
| |
Megachasma applegatei is an extinct species of megamouth shark from the Oligocene to early Miocene (28-23 Mya) of the Western United States.[1][2] The type fossil was discovered in the San Joaquin Valley in 1973, but only described in 2014, when the species was named after its discoverer, Shelton Applegate.[3]
Description
Megachasma applegatei is only known from isolated teeth. Based on comparison with the teeth of the recent species (Megachasma pelagios), it was approximately 6 m long and, like modern megamouth sharks, probably fed on fish and small planktonic invertebrates both in deep and shallow water habitats. Its teeth had shorter crowns and a pair of side cusplets.[4] The teeth were also more variable in shape than the modern megamouth's, and may have been arranged in the distinctive heterodont "lamnoid tooth pattern" seen in predatory lamniform sharks.[5]
References
- ↑ "†family Megachasmidae (mackerel shark)". https://paleobiodb.org/classic/checkTaxonInfo?taxon_no=83151&is_real_user=1.
- ↑ "Megachasma applegatei SHIMADA, WELTON & LONG, 2014". https://shark-references.com/species/view/Megachasma-applegatei.
- ↑ "A Forgotten Fossil Megamouth Gets a Name". https://www.nationalgeographic.com/science/phenomena/2014/03/12/a-forgotten-fossil-megamouth-gets-a-name/.
- ↑ Shimada, K.; Welton, B. J.; Long, D. J. (2014). "A new fossil megamouth shark (Lamniformes, Megachasmidae) from the Oligocene-Miocene of the western United States". Journal of Vertebrate Paleontology 34 (2): 281–290. doi:10.1080/02724634.2013.803975. Bibcode: 2014JVPal..34..281S. https://figshare.com/articles/A_new_fossil_megamouth_shark_Lamniformes_Megachasmidae_from_the_Oligocene_Miocene_of_the_western_United_States/963513.
- ↑ Krak, Alexandra M.; Shimada, Kenshu (2023). "The dentition of the extinct megamouth shark, Megachasma applegatei (Lamniformes: Megachasmidae), from southern California, USA, based on geometric morphometrics" (in en). PaleoBios 40 (1). doi:10.5070/P940160139. ISSN 0031-0298. https://escholarship.org/uc/item/4990r1hx.
Wikidata ☰ Q22104176 entry
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