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New dinosaur, crocodylomorph and swim tracks from the Late Jurassic of the Lusitanian Basin: implications for ichnodiversity
Lethaia ( IF 1.5 ) Pub Date : 2020-11-04 , DOI: 10.1111/let.12402
Diego Castanera 1 , Elisabete Malafaia 2, 3, 4 , Bruno C. Silva 4, 5 , Vanda F. Santos 2, 6 , Matteo Belvedere 7, 8
Affiliation  

New dinosaur (theropod and sauropod), crocodylomorph and swim tracks from Upper Jurassic units of the Lusitanian Basin, housed at the Sociedade de História Natural in Torres Vedras, are here described. They were collected from three different geological formations, the Praia da Amoreira‐Porto Novo (upper Kimmeridgian) and the Alcobaça (Kimmeridgian‐lower Tithonian) formations in the Consolação Sub‐basin and the Freixial Fm. (middle‐upper Tithonian) in the Turcifal Sub‐basin. Four different theropod morphotypes are identified as follows: cf. Jurabrontes isp., Megalosauripus cf. transjuranicus, Grallatoridae indet. and an indeterminate morphotype (Theropoda indet.) that have affinities with other Therangospodus‐like tracks described in Europe. An indeterminate sauropod track is also identified. These five morphotypes suggest high saurischian dinosaur ichnodiversity, similar to that seen in other European Late Jurassic areas (e.g. the Swiss Jura Mountains), but represent just a portion of the higher diversity exhibited by the osteological record in the Lusitanian Basin. Further, one crocodylomorph pes track identified as Crocodylopodus isp. and swim tracks assigned to Characichnos isp., possibly also produced by crocodylomorphs, are also identified. The newly identified ichnotaxa, together with the older and other recent identifications, indicate ichnodiversity comparable with the richest coeval Upper Jurassic units.

中文翻译:

Lusitanian盆地晚侏罗世的新恐龙,鳄形和游动轨迹:对鱼类多样性的影响

这里描述了新的恐龙(兽脚亚目和蜥脚类恐龙),鳄形动物和来自卢西塔尼亚盆地上侏罗纪单元的游泳道,它们位于托雷斯韦德拉什自然历史学会内。它们是从Consolação次盆地和Freixial Fm的三个不同的地质构造中收集的,它们分别是Praia da Amoreira-Porto Novo(基默尼迪安河上层)和Alcobaça(Kimmeridgian-下提通尼安河下)地层。(图提尼克阶中上层)。鉴定出四种不同的兽脚类动物形态,如下所示:cf. Jurabrontes ISP,Megalosauripus参见 Transjuranicus,Gra科。和一个不确定的形态型(Theropoda indet。),与其他Therangospodus有亲缘关系在欧洲描述的类似曲目。还确定了一条不确定的蜥脚类动物足迹。这五种形态类型表明,萨里斯基恐龙的鱼类多样性较高,与欧洲其他侏罗纪晚期地区(如瑞士侏罗山地区)相似,但仅代表卢西塔尼亚盆地骨学记录所显示的较高多样性的一部分。此外,一个被鉴定为鳄鳄isp的鳄形纲轨迹。并确定了可能也由鳄形动物产生的,分配给Characichnos isp。的泳道。新近鉴定的鱼鳞目,与较早的和其他最近的鉴定相吻合,表明鱼鳞多样性可与最富有的上侏罗纪单位相提并论。
更新日期:2020-11-04
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