Yezoteuthis is known from a single upper jaw that shares close similarities with those of oegopsids, hence its assignment to that order. These jaws are very large, and a comparison to modern squid indicates that Yezoteuthis would have rivalled the extant giant squid (Architeuthis) in size, reaching more than 5 metres (16 ft) in length. Yezoteuthis was likely a major predator of its ecosystem and existed at a high trophic level.[1][2]
A second set of oegopsid jaws closely resembling those of Yezoteuthis was described from the Yezo Group in 2023, but was found to be even larger and have different proportions of those from Yezoteuthis, indicating that it is a different species, with its genus also remaining uncertain. Yezoteuthis also coexisted with the slightly smaller but still very large oegopsid Haboroteuthis , although it is possible that Haboroteuthis may be conspecific with Yezoteuthis.[3][4][5]
Referencesedit
^ abTanabe, Kazushige; Hikida, Yoshinori; Iba, Yasuhiro (2006). "Two coleoid jaws from the Upper Cretaceous of Hokkaido, Japan". Journal of Paleontology. 80 (1): 138–145. doi:10.1666/0022-3360(2006)080[0138:TCJFTU]2.0.CO;2. ISSN 0022-3360.
^Carnall, Mark (2017-10-31). "Searching for the Old Ones: Lovecraftian giant cephalopods and the fossil record". The Guardian. ISSN 0261-3077. Retrieved 2023-12-15.
^Tanabe, Kazushige; Misaki, Akihiro (2023). "Upper Cretaceous record of non-belemnitid coleoid jaws from Hokkaido, Japan, and its evolutionary implications". Cretaceous Research. 151: 105624. doi:10.1016/j.cretres.2023.105624. ISSN 0195-6671.
^Mironenko, Aleksandr A. (2023-12-01). "Unusual findings of cephalopod jaws in Mesozoic shallow water sandy facies". Cretaceous Research. 152: 105687. doi:10.1016/j.cretres.2023.105687. ISSN 0195-6671.
^Tanabe, Kazushige; Misaki, Akihiro; Ubukata, Takao (2014). "Late Cretaceous record of large soft-bodied coleoids based on lower jaw remains from Hokkaido, Japan". Acta Palaeontologica Polonica. doi:10.4202/app.00052.2013. ISSN 0567-7920.
April 11, 2024
yezoteuthis, yezo, squid, extinct, genus, very, large, oegopsid, squid, that, inhabited, seas, around, japan, late, cretaceous, period, contains, single, species, giganteus, from, early, campanian, osousyunai, formation, yezo, group, hokkaido, possibly, larges. Yezoteuthis Yezo squid is an extinct genus of very large oegopsid squid that inhabited the seas around Japan in the Late Cretaceous period It contains a single species Y giganteus from the early Campanian Osousyunai Formation of the Yezo Group in Hokkaido It is possibly the largest fossil coleoid ever described 1 YezoteuthisTemporal range Campanian 77 Ma PreꞒ Ꞓ O S D C P T J K Pg N Scientific classificationDomain EukaryotaKingdom AnimaliaPhylum MolluscaClass CephalopodaOrder OegopsidaGenus YezoteuthisTanabe Hikida amp Iba 2006Species Y giganteusBinomial name Yezoteuthis giganteusTanabe Hikida amp Iba 2006Yezoteuthis is known from a single upper jaw that shares close similarities with those of oegopsids hence its assignment to that order These jaws are very large and a comparison to modern squid indicates that Yezoteuthis would have rivalled the extant giant squid Architeuthis in size reaching more than 5 metres 16 ft in length Yezoteuthis was likely a major predator of its ecosystem and existed at a high trophic level 1 2 A second set of oegopsid jaws closely resembling those of Yezoteuthis was described from the Yezo Group in 2023 but was found to be even larger and have different proportions of those from Yezoteuthis indicating that it is a different species with its genus also remaining uncertain Yezoteuthis also coexisted with the slightly smaller but still very large oegopsid Haboroteuthis although it is possible that Haboroteuthis may be conspecific with Yezoteuthis 3 4 5 References edit a b Tanabe Kazushige Hikida Yoshinori Iba Yasuhiro 2006 Two coleoid jaws from the Upper Cretaceous of Hokkaido Japan Journal of Paleontology 80 1 138 145 doi 10 1666 0022 3360 2006 080 0138 TCJFTU 2 0 CO 2 ISSN 0022 3360 Carnall Mark 2017 10 31 Searching for the Old Ones Lovecraftian giant cephalopods and the fossil record The Guardian ISSN 0261 3077 Retrieved 2023 12 15 Tanabe Kazushige Misaki Akihiro 2023 Upper Cretaceous record of non belemnitid coleoid jaws from Hokkaido Japan and its evolutionary implications Cretaceous Research 151 105624 doi 10 1016 j cretres 2023 105624 ISSN 0195 6671 Mironenko Aleksandr A 2023 12 01 Unusual findings of cephalopod jaws in Mesozoic shallow water sandy facies Cretaceous Research 152 105687 doi 10 1016 j cretres 2023 105687 ISSN 0195 6671 Tanabe Kazushige Misaki Akihiro Ubukata Takao 2014 Late Cretaceous record of large soft bodied coleoids based on lower jaw remains from Hokkaido Japan Acta Palaeontologica Polonica doi 10 4202 app 00052 2013 ISSN 0567 7920 Retrieved from https en wikipedia org w index php title Yezoteuthis amp oldid 1213237965, wikipedia, wiki, book, books, library,
