Oegopsida is one of the two orders of squid in the superorderDecapodiformes, in the classCephalopoda. Together with the Myopsina, it was formerly considered to be a suborder of the order Teuthida, in which case it was known as Oegopsina. This reclassification is due to Oegopsina and Myopsina not being demonstrated to form a clade.[3]
The Oegopsida are an often pelagic squid, with some nerito-oceanic species associated with sea mounts.[4] They consist of 24 families and 69 genera. They have these characters in common: the head is without tentacle pockets, eyes lack a corneal covering, arms and tentacle clubs may have hooks, the buccal supports are without suckers, and oviducts in females are paired.
Two families, the Bathyteuthidae and Chtenopterygidae, which have features characteristic of the Myopsida while retaining others common to the Oegopsina, were formerly placed in the family, but are now placed in their own order Bathyteuthida.[5]
The Oegopsida differ from the coastal Myopsida, characterised by the genus Loligo, which have corneal coverings over the eyes and tentacle pockets, but lack hooks, have no suckers on the buccal supports, and a single oviduct.
Oegopsid squid are the only decapods that lack a pocket for the tentacles. Otherwise, they share different characters with different decapod groups. Like the Bathyteuthida and Myopsida, the Oegopsida have a brachial canal, which is absent in other forms. As with the Spirulidae and Idiosepiidae, the Oegopsida lack suckers on the buccal supports, and like the Bathyteuthida, Idiosepiidae, and Spirulidae, they have no circular muscle on the suckers.
The earliest fossils of Oegopsida are jaw fragments from the Santonian or early Campanian of the Yezo Group in Hokkaido, Japan. These jaw fragments are extremely large, suggesting that oegopsids could already evolve very large body sizes early on. One of these fossils was described as the genus Yezoteuthis, which has been estimated to rival the modern giant squid in size. Another jaw fragment described in 2023 was found to be twice as long as a giant squid's jaws.[1][6]
Taxonomyedit
The following taxonomic classification was found by Fernández-Álvarez et al., 2021:[5]
^ abTanabe, Kazushige; Hikida, Yoshinori; Iba, Yasuhiro (January 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.
^Philippe Bouchet (2018). "Oegopsida". World Register of Marine Species. Flanders Marine Institute. Retrieved 22 February 2018.
^Jan M. Strugnell; Annie Lindgren; Louise M. Allcock (2009). "Cephalopod mollusks Cephalopoda". In S. Blair Hedges; Sudhir Kumar (eds.). The Timetree of Life. OUP Oxford. pp. 2–18.
^P., Roper, Clyde F. E., 1937- Jereb (2010). Cephalopods of the world : an annotated and illustrated catalogue of cephalopod species known to date(PDF). Food and Agriculture Organization of the United Nations. ISBN978-9251053836. OCLC 880299294.{{cite book}}: CS1 maint: multiple names: authors list (link) CS1 maint: numeric names: authors list (link)
^ abcFernández-Álvarez, Fernando Ángel; Taite, Morag; Vecchione, Michael; Villanueva, Roger; Louise, Allcock. "A phylogenomic look into the systematics of oceanic squids". academic.oup.com. doi:10.1093/zoolinnean/zlab069. hdl:10261/267184. Retrieved 2023-04-08.
^Tanabe, Kazushige; Misaki, Akihiro (2023-11-01). "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.
oegopsida, orders, squid, superorder, decapodiformes, class, cephalopoda, together, with, myopsina, formerly, considered, suborder, order, teuthida, which, case, known, oegopsina, this, reclassification, oegopsina, myopsina, being, demonstrated, form, clade, t. Oegopsida is one of the two orders of squid in the superorder Decapodiformes in the class Cephalopoda Together with the Myopsina it was formerly considered to be a suborder of the order Teuthida in which case it was known as Oegopsina This reclassification is due to Oegopsina and Myopsina not being demonstrated to form a clade 3 OegopsidaTemporal range Late Cretaceous recent 1 PreꞒ Ꞓ O S D C P T J K Pg NMoroteuthis ingensScientific classificationDomain EukaryotaKingdom AnimaliaPhylum MolluscaClass CephalopodaSuperorder DecapodiformesOrder OegopsidaOrbigny 1845 2 FamiliesSee textSynonymsDecabranchia Decapoda Leach 1817The Oegopsida are an often pelagic squid with some nerito oceanic species associated with sea mounts 4 They consist of 24 families and 69 genera They have these characters in common the head is without tentacle pockets eyes lack a corneal covering arms and tentacle clubs may have hooks the buccal supports are without suckers and oviducts in females are paired Two families the Bathyteuthidae and Chtenopterygidae which have features characteristic of the Myopsida while retaining others common to the Oegopsina were formerly placed in the family but are now placed in their own order Bathyteuthida 5 The Oegopsida differ from the coastal Myopsida characterised by the genus Loligo which have corneal coverings over the eyes and tentacle pockets but lack hooks have no suckers on the buccal supports and a single oviduct Oegopsid squid are the only decapods that lack a pocket for the tentacles Otherwise they share different characters with different decapod groups Like the Bathyteuthida and Myopsida the Oegopsida have a brachial canal which is absent in other forms As with the Spirulidae and Idiosepiidae the Oegopsida lack suckers on the buccal supports and like the Bathyteuthida Idiosepiidae and Spirulidae they have no circular muscle on the suckers Contents 1 Evolution 2 Taxonomy 2 1 Phylogeny 3 References 4 External linksEvolution editThe earliest fossils of Oegopsida are jaw fragments from the Santonian or early Campanian of the Yezo Group in Hokkaido Japan These jaw fragments are extremely large suggesting that oegopsids could already evolve very large body sizes early on One of these fossils was described as the genus Yezoteuthis which has been estimated to rival the modern giant squid in size Another jaw fragment described in 2023 was found to be twice as long as a giant squid s jaws 1 6 Taxonomy editThe following taxonomic classification was found by Fernandez Alvarez et al 2021 5 Order Oegopsida Superfamily Architeuthoidea Family Architeuthidae Family Neoteuthidae Superfamily Cranchioidea Family Cranchiidae Family Ommastrephidae Family Thysanoteuthidae Superfamily Chiroteuthoidea Family Batoteuthidae Family Chiroteuthidae Family Joubiniteuthidae Family Magnapinnidae Family Mastigoteuthidae Family Promachoteuthidae Superfamily Cycloteuthoidea Family Brachioteuthidae Family Cycloteuthidae Superfamily Enoploteuthoidea Family Ancistrocheiridae Family Enoploteuthidae Family Lampadioteuthidae Family Lycoteuthidae Family Pyroteuthidae Superfamily Pholidoteuthoidea Family Pholidoteuthidae Superfamily Octopoteuthoidea Family Lepidoteuthidae Family Octopoteuthidae incertae sedis Family Gonatidae Family Histioteuthidae Family Onychoteuthidae Family Psychroteuthidae Genus YezoteuthisPhylogeny edit The following phylogeny was found by Fernandez Alvarez et al 2021 5 Oegopsida Cranchioidea CranchiidaeOmmastrephidaeThysanoteuthidaeGonatidaeHistioteuthidaeOnychoteuthidaeArchiteuthoidea ArchiteuthidaeNeoteuthidaeCycloteuthoidea CycloteuthidaeBrachioteuthidaeEnoploteuthoidea EnoploteuthidaeAncistrocheiridaeLampadioteuthidaeLycoteuthidaePyroteuthidaeOctopoteuthoidea OctopoteuthidaeLepidoteuthidaeChiroteuthoidea ChiroteuthidaeMastigoteuthidaeMagnapinnidaeJoubiniteuthidaePholidoteuthoidea PholidoteuthidaeReferences edit a b Tanabe Kazushige Hikida Yoshinori Iba Yasuhiro January 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 Philippe Bouchet 2018 Oegopsida World Register of Marine Species Flanders Marine Institute Retrieved 22 February 2018 Jan M Strugnell Annie Lindgren Louise M Allcock 2009 Cephalopod mollusks Cephalopoda In S Blair Hedges Sudhir Kumar eds The Timetree of Life OUP Oxford pp 2 18 P Roper Clyde F E 1937 Jereb 2010 Cephalopods of the world an annotated and illustrated catalogue of cephalopod species known to date PDF Food and Agriculture Organization of the United Nations ISBN 978 9251053836 OCLC 880299294 a href Template Cite book html title Template Cite book cite book a CS1 maint multiple names authors list link CS1 maint numeric names authors list link a b c Fernandez Alvarez Fernando Angel Taite Morag Vecchione Michael Villanueva Roger Louise Allcock A phylogenomic look into the systematics of oceanic squids academic oup com doi 10 1093 zoolinnean zlab069 hdl 10261 267184 Retrieved 2023 04 08 Tanabe Kazushige Misaki Akihiro 2023 11 01 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 External links edit nbsp Wikispecies has information related to Oegopsida nbsp The Wikibook Dichotomous Key has a page on the topic of Oegopsina Cephbase Oegopsina nbsp This squid related article is a stub You can help Wikipedia by expanding it vte Retrieved from https en wikipedia org w index php title Oegopsida amp oldid 1193927459, wikipedia, wiki, book, books, library,
