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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.[2]
The Oegopsida are an often pelagic squid, with some nerito-oceanic species associated with sea mounts.[3] 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.[4]
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 following taxonomic classification was found by Fernández-Álvarez et al., 2021:[4]
The following phylogeny was found by Fernández-Álvarez et al., 2021:[4]
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.
The Oegopsida are an often pelagic squid, with some nerito-oceanic species associated with sea mounts. 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.
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.
Les Oegopsida sont un ordre de céphalopodes décapodes, qui constituent avec leur groupe frère Myopsida le groupe des « calmars ».
Ce groupe comprend de nombreuses espèces abyssales, dont les différentes espèces de calmars géants.
Selon World Register of Marine Species (9 janvier 2015)[3] :
Certaines classifications substituent à ce taxon le sous-ordre des Oegopsina, au sein de l'ordre des Teuthida.
Les Oegopsida sont un ordre de céphalopodes décapodes, qui constituent avec leur groupe frère Myopsida le groupe des « calmars ».
Ce groupe comprend de nombreuses espèces abyssales, dont les différentes espèces de calmars géants.
A dos egópsidos (Oegopsida), tamén coñecidos antigamente por oigópsidos (Oigopsida),[3][4] é unha orde de moluscos cefalópodos da superorde dos decapodiformes,[1] ou decápodos, que constitúe, co seu grupo irmán, o dos miópsidos, os cefalópodos coñecidos na bibliografía internacional como "luras".
O grupo comprende numerosas especies abisais, entre elas varias de luras xigantes.
Os egópsidos son un luras peláxicas, con algunhas especies nerito-oceánicas asociadas a montes submarinos.[5]
Unha característica distintiva con respecto aos miópsidos é que teñen un burato na córnea que pon en comuncación co exterior a cámara anterior do ollo. As femias presentan dous ovidutos.[6]
A orde foi descrita en 1845 polo naturalista francés Alcide d'Orbigny.
O termo Oegopsida está formado polos elementos do latín científico oeg-, tirado do grego antigo οίγω oígō, 'abrir', e -opsida, derivado do grego antigo ὅψις ópsis, 'ollo'. Literalmente: 'os de ollos abertos', aludindo ao burato que teñen na córnea dos ollos.
Segundo o WoRMS, a orde comprende as seguintes familias:[1]
Para algúns autores, o grupo é unha suborde da orde dos téutidos (Teuthida), co nome de Oegopsina.[7] Porén, Teuthida é un nomen dubium, que inclúe [Myopsida + Oegopsida], pero non está demostrado que formen un clado.[8]
A dos egópsidos (Oegopsida), tamén coñecidos antigamente por oigópsidos (Oigopsida), é unha orde de moluscos cefalópodos da superorde dos decapodiformes, ou decápodos, que constitúe, co seu grupo irmán, o dos miópsidos, os cefalópodos coñecidos na bibliografía internacional como "luras".
O grupo comprende numerosas especies abisais, entre elas varias de luras xigantes.
