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Cutting the Gordian knot: a historical and taxonomic revision of the Jurassic crocodylomorph Metriorhynchus
Zoological Journal of the Linnean Society ( IF 2.8 ) Pub Date : 2020-11-03 , DOI: 10.1093/zoolinnean/zlaa092 Mark T Young 1 , Arnaud Brignon 2 , Sven Sachs 3 , Jahn J Hornung 4 , Davide Foffa 5 , James J N Kitson 6 , Michela M Johnson 1 , Lorna Steel 7
Zoological Journal of the Linnean Society ( IF 2.8 ) Pub Date : 2020-11-03 , DOI: 10.1093/zoolinnean/zlaa092 Mark T Young 1 , Arnaud Brignon 2 , Sven Sachs 3 , Jahn J Hornung 4 , Davide Foffa 5 , James J N Kitson 6 , Michela M Johnson 1 , Lorna Steel 7
Affiliation
Metriorhynchidae was a clade of extinct crocodylomorphs that adapted to a pelagic lifestyle, becoming a key component of Mesozoic lagoonal and coastal marine ecosystems. The type genus Metriorhynchus is one of the best-known genera of Mesozoic crocodylomorphs, and since the mid-19th century, the ‘concept’ of Metriorhynchus has become associated with the referred species Me. superciliosus. Historically Metriorhynchus has been the most species-rich genus in Metriorhynchidae, with most Middle Jurassic species and many Late Jurassic species referred to the genus at some point in their history. However, the type species Me. geoffroyii has largely been omitted in the literature. Its type series is a chimera of multiple metriorhynchid species, and a type specimen has never been designated. Moreover, phylogenetic analyses have repeatedly shown that the 19th–20th century concept of Metriorhynchus is not monophyletic – to the point where only referring every metriorhynchid species, and some basal metriorhynchoids, to the genus would render it monophyletic. Herein we designate a lectotype for Me. geoffroyii, re-describe it and restrict the genus Metriorhynchus to the type species. We also establish the new genus Thalattosuchus for Me. superciliosus, thereby cutting the ‘Gordian knot’ of Metriorhynchus with Th. superciliosus.
中文翻译:
解开戈尔迪之结:侏罗纪鳄鱼形目Metriorhynchus的历史和分类学修订
Metriorhynchidae 是已灭绝的鳄鱼科,适应远洋生活方式,成为中生代泻湖和沿海海洋生态系统的重要组成部分。类型属地蜥鳄属是中生代鳄形超目的最知名的属之一,并且由于中间19个世纪,的“概念”地蜥鳄属已成为关联与称为物种我。目空一切。从历史上看,Metriorhynchus一直是Metriorhynchidae中物种最丰富的属,大多数中侏罗世物种和许多晚侏罗世物种在其历史上的某个时刻都提到了该属。然而,类型物种Me。杰佛罗伊文献中基本省略。它的模式系列是多个metriorhynchid 物种的嵌合体,从未指定模式标本。此外,系统发育分析一再表明,19日-20日的世纪概念地蜥鳄属不单系-到仅指每metriorhynchid品种,以及一些基础metriorhynchoids点,属会使其单系。在此,我们为我指定了一个选型。geoffroyii,重新描述它并将Metriorhynchus属限制为模式种。我们还为我建立了新的Thalattosuchus属。superciliosus,从而切断了“戈尔迪之结”Metriorhynchus与Th。目空一切。
更新日期:2020-11-03
中文翻译:
解开戈尔迪之结:侏罗纪鳄鱼形目Metriorhynchus的历史和分类学修订
Metriorhynchidae 是已灭绝的鳄鱼科,适应远洋生活方式,成为中生代泻湖和沿海海洋生态系统的重要组成部分。类型属地蜥鳄属是中生代鳄形超目的最知名的属之一,并且由于中间19个世纪,的“概念”地蜥鳄属已成为关联与称为物种我。目空一切。从历史上看,Metriorhynchus一直是Metriorhynchidae中物种最丰富的属,大多数中侏罗世物种和许多晚侏罗世物种在其历史上的某个时刻都提到了该属。然而,类型物种Me。杰佛罗伊文献中基本省略。它的模式系列是多个metriorhynchid 物种的嵌合体,从未指定模式标本。此外,系统发育分析一再表明,19日-20日的世纪概念地蜥鳄属不单系-到仅指每metriorhynchid品种,以及一些基础metriorhynchoids点,属会使其单系。在此,我们为我指定了一个选型。geoffroyii,重新描述它并将Metriorhynchus属限制为模式种。我们还为我建立了新的Thalattosuchus属。superciliosus,从而切断了“戈尔迪之结”Metriorhynchus与Th。目空一切。