Tetraodontiformes (), also known as the Plectognathi, is an order of ray-finned fishes which includes the pufferfishes and related taxa. This order has been classified as a suborder of the order Perciformes, although recent studies have found that it, as the Tetraodontoidei, is a sister taxon to the anglerfish order Lophiiformes, called Lophiodei, and have placed both taxa within the Acanthuriformes. The Tetraodontiformes are represented by 10 extant families and at around 430 species overall. The majority of the species within this order are marine but a few may be found in freshwater. They a
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Sattel-Spitzkopfkugelfisch (Canthigaster valentini) Die Kugelfischartigen (Tetraodontiformes) (altgriechisch τετρα- tetra- „vier“, ὀδόντες odóntes „Zähne“, lateinisch forma „Gestalt“), auch Kugelfischverwandte, Kugelfischähnliche oder mittlerweile veraltet Haftkiefer (Plectognathi) genannt, sind eine Ordnung der Knochenfische mit über 430[1] bekannten Arten. Zu ihnen gehören die Drückerfische (Balistidae), die Feilenfische (Monacanthidae), die Kofferfische (Ostraciidae), die Kugelfische (Tetraodontidae), die Igelfische (Diodontidae), die Mondfische (Molidae) sowie vier weitere, unbekanntere Familien. Sie sind in Bezug auf ihre morphologischen Merkmale und ihre Lebensweise eine der am meisten diversen Knochenfischordnungen und bewohnen verschiedenste Habitate. Mehr als die Hälfte aller Arten ist riffgebunden, es gibt jedoch auch Bewohner von Seegraswiesen und anderer tropischer Küstenökosysteme, sowie pelagische Formen (Mondfische) und Bewohner der Tiefsee unter den Kugelfischverwandten.[1] Der deutsche Name Haftkiefer weist auf die verschmolzenen Zwischenkieferknochen (Praemaxillare) und Kieferknochen (Maxillare) sowie einige weitere Modifikationen des Schädels hin, die allen Arten
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Tetraodontiformes (), also known as the Plectognathi, is an order of ray-finned fishes which includes the pufferfishes and related taxa. This order has been classified as a suborder of the order Perciformes, although recent studies have found that it, as the Tetraodontoidei, is a sister taxon to the anglerfish order Lophiiformes, called Lophiodei, and have placed both taxa within the Acanthuriformes. The Tetraodontiformes are represented by 10 extant families and at around 430 species overall. The majority of the species within this order are marine but a few may be found in freshwater. They are found throughout the world.
==Taxonomy== Tetraodontiformes is a name first used for this order in 1940 by Lev Berg, the order was originally proposed in 1817 as the "Les Plectognathes", the Plectognathi. Cuvier divided this into two families, "Les Gymnodontes" and "Les Sclerodermes". In 1940 Berg first used the term Tetraodontiformes for this order and this name is the currently accepted name as it follows the International Code of Zoological Nomenclature rule that a name for a family or higher taxa must have its root based on the type species of that grouping. In this case the type species is Tetraodon lineatus Linnaeus, 1758. The 5th edition of Fishes of the World recognises the order as a derived order within the Actinopterygii and as a monophyletic order within the Percomorpha. Other authorities have proposed that it is not an order but that it is a clade, the Tetraodontoidei, within the order Acanthuriformes and is most closely related to the Lophiodei, the anglerfishes.
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