Petalichthyida is an extinct order of small, flattened placoderm fish. They are typified by their splayed pectoral fins, exaggerated lateral spines, flattened bodies, and numerous tubercles that decorated all of the plates and scales of their armor. They reached a peak in diversity during the Early Devonian and were found throughout the world, particularly in Europe (especially in Germany), North America, Asia, South America, and Australia. The petalichthids Lunaspis and are among the best known. The earliest and most primitive known petalichthyid is Diandongpetalichthys, which is from earliest Devonian-aged strata of Yunnan. The presence of Diandongpetalichthys, along with other primitive petalichthyids including Neopetalichthys and Quasipetalichthys, and more advanced petalichthyids, su
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| - Petalichthyida (en)
- Petalichthyida (de)
- Petalichthyida (it)
- 瓣甲鱼目 (zh)
- Petalichthyida (uk)
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| - Die Petalichthyida (Petalichthyformes) sind eine Gruppe der ausgestorbenen Placodermi, fischartiger, gepanzerter Wirbeltiere aus dem Devon. Sie waren bodenbewohnende Meerestiere. Insgesamt wurden nur acht Gattungen beschrieben. Die Gruppe erreichte im Unterdevon ihre höchste Diversität, nur wenige Arten überlebten bis zum Oberdevon. (de)
- I petalittidi (Petalichthyida) sono un ordine di pesci placodermi, vissuti principalmente nel Devoniano inferiore. I loro resti sono stati rinvenuti in gran parte del mondo: Europa (soprattutto Germania), Nordamerica, Asia, Sudamerica e Australia. (it)
- Petalichthyida — ряд вимерлих панцирних риб, який існував протягом девонського періоду (415–375 млн років тому). Скам'янілі рештки представників ряду знаходять по всьому світі (Німеччина, Азія, Північна Америка, Південна Америка, Австралія). (uk)
- 瓣甲鱼目（學名：Petalichthyida），又称扁平魚目，是生活在泥盆紀的一支体型小而扁平的盾皮魚類，在泥盆紀中期最为繁盛。化石产自世界各地，主要见于歐洲（特別是德國）、美洲、亞洲和澳洲。 (zh)
- Petalichthyida is an extinct order of small, flattened placoderm fish. They are typified by their splayed pectoral fins, exaggerated lateral spines, flattened bodies, and numerous tubercles that decorated all of the plates and scales of their armor. They reached a peak in diversity during the Early Devonian and were found throughout the world, particularly in Europe (especially in Germany), North America, Asia, South America, and Australia. The petalichthids Lunaspis and are among the best known. The earliest and most primitive known petalichthyid is Diandongpetalichthys, which is from earliest Devonian-aged strata of Yunnan. The presence of Diandongpetalichthys, along with other primitive petalichthyids including Neopetalichthys and Quasipetalichthys, and more advanced petalichthyids, su (en)
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| - Early Lochkovian - Frasnian (en)
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| - *Diandongpetalichthys
*Quasipetalichthyidae
*Macropetalichthyidae (en)
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| - Die Petalichthyida (Petalichthyformes) sind eine Gruppe der ausgestorbenen Placodermi, fischartiger, gepanzerter Wirbeltiere aus dem Devon. Sie waren bodenbewohnende Meerestiere. Insgesamt wurden nur acht Gattungen beschrieben. Die Gruppe erreichte im Unterdevon ihre höchste Diversität, nur wenige Arten überlebten bis zum Oberdevon. (de)
- Petalichthyida is an extinct order of small, flattened placoderm fish. They are typified by their splayed pectoral fins, exaggerated lateral spines, flattened bodies, and numerous tubercles that decorated all of the plates and scales of their armor. They reached a peak in diversity during the Early Devonian and were found throughout the world, particularly in Europe (especially in Germany), North America, Asia, South America, and Australia. The petalichthids Lunaspis and are among the best known. The earliest and most primitive known petalichthyid is Diandongpetalichthys, which is from earliest Devonian-aged strata of Yunnan. The presence of Diandongpetalichthys, along with other primitive petalichthyids including Neopetalichthys and Quasipetalichthys, and more advanced petalichthyids, suggest that the order may have arisen in China, possibly during the late Silurian. Because they had compressed body forms, it is speculated they were bottom-dwellers that chased after or ambushed smaller fish. Their diet is not clear, as none of the fossil specimens found have preserved mouthparts. (en)
- I petalittidi (Petalichthyida) sono un ordine di pesci placodermi, vissuti principalmente nel Devoniano inferiore. I loro resti sono stati rinvenuti in gran parte del mondo: Europa (soprattutto Germania), Nordamerica, Asia, Sudamerica e Australia. (it)
- Petalichthyida — ряд вимерлих панцирних риб, який існував протягом девонського періоду (415–375 млн років тому). Скам'янілі рештки представників ряду знаходять по всьому світі (Німеччина, Азія, Північна Америка, Південна Америка, Австралія). (uk)
- 瓣甲鱼目（學名：Petalichthyida），又称扁平魚目，是生活在泥盆紀的一支体型小而扁平的盾皮魚類，在泥盆紀中期最为繁盛。化石产自世界各地，主要见于歐洲（特別是德國）、美洲、亞洲和澳洲。 (zh)
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