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首页> 外文期刊>Anais da Academia Brasileira de Ciencias >Distributional patterns of †Mawsoniidae (Sarcopterygii: Actinistia)
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Distributional patterns of †Mawsoniidae (Sarcopterygii: Actinistia)

机译：毛氏科的分布模式（Sarcopterygii：Actinistia）

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Mawsoniidae are a fossil family of actinistian fish popularly known as coelacanths, which are found in continental and marine paleoenvironments. The taxon is considered monophyletic, including five valid genera (Axelrodichthys, Chinlea,Diplurus, Mawsonia andParnaibaia) and 11 genera with some taxonomical controversy (Alcoveria, Changxingia,Garnbergia, Heptanema,Indocoelacanthus, Libys,Lualabaea, Megalocoelacanthus,Moenkopia, Rhipis andTrachymetopon). The genera restricted to the Northern Hemisphere (Diplurus and Chinlea) possess the oldest records (Late Triassic), whereas those found in the Southern Hemisphere (Mawsonia, Axelrodichthys, andParnaibaia) extend from Late Jurassic to Late Cretaceous, especially in Brazil and Africa. We identified distributional patterns of Mawsoniidae, applying the panbiogeographical method of track analysis, and obtained three generalized tracks (GTs): GT1 (Northeastern Newark) in strata of the Newark Group (Upper Triassic); GT2 (Midwestern Gondwana) in the Lualaba Formation (Upper Jurassic); and GT3 (Itapecuru-Alcantara-Santana) in the Itapecuru-Alcantara-Santana formations (Lower Cretaceous). The origin of Mawsoniidae can be dated to at least Late Triassic of Pangaea. The tectonic events related to the breakup of Pangaea and Gondwana and the evolution of the oceans are suggested as the vicariant events modeling the distribution of this taxon throughout the Mesozoic.
机译：莫氏鳄科是放线虫鱼类的化石家族，俗称腔棘鱼，在大陆和海洋古环境中发现。该分类单元被认为是单系的，包括五个有效属（Axelrodichthys，Chinlea，Diplurus，Mawsonia和Parnaibaia）和11个属，在某些分类学上存在争议（Alcoveria，Changxingia，Garnbergia，Heptanema，Indocoelacanthusus，Libys，Lualabay，Ripabay，Rhoabayea，Rhoabayea，Megalocoelacanus）。限于北半球的属（Diplurus和Chinlea）拥有最古老的记录（晚期三叠纪），而在南半球的属（毛wsonia，Axelrodichthys和Parnaibaia）则从侏罗纪晚期到白垩纪晚期，特别是在巴西和非洲。我们采用径迹分析的生物地理学方法确定了毛氏科的分布模式，并获得了三个广义径迹（GTs）：纽瓦克群（上三叠纪）地层中的GT1（东北纽瓦克）;卢拉巴组（侏罗纪上段）的GT2（冈瓦纳中西部）; Itapecuru-Alcantara-Santana地层（下白垩统）中的GT3（Itapecuru-Alcantara-Santana）。 Mawsoniidae的起源至少可以追溯到Pangaea的三叠纪晚期。与盘古和冈瓦纳解体以及海洋演化有关的构造事件被认为是模拟该分类群在整个中生代分布的维多利亚时代事件。

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