New records of the Oligo-Miocene mekosuchine crocodylian, Baru, from Queensland and the Northern Territory are described. Baru wickeni and Baru darrowi are accepted as valid species in the genus and their diagnoses are revised. Both species are present in Queensland and the Northern Territory but are restricted in time, with B. wickeni known from the late Oligocene and B. darrowi from the middle Miocene. The broad geographic distributions and restricted time spans of these species indicate that this genus is useful for biochronology. The record of B. wickeni from the Pwerte Marnte Marnte Local Fauna in the Northern Territory establishes that the species inhabited the north-western margin of the Lake Eyre Basin (LEB) drainage system. More southerly Oligo-Miocene sites in the LEB contain only one crocodylian species, Australosuchus clarkae. The Pwerte Marnte Marnte occurrence of B. wickeni indicates that the separation of Baru and Australosuchus did not correspond with the boundaries of drainage basins and that palaeolatitude was a more likely segregating factor.

译文

:描述了来自昆士兰州和北领地的Oligo-中新世Mekosuchine鳄鳄Baru的新记录。 Baru wickeni和Baru darrowi被认为是该属中的有效物种,其诊断也有所修改。这两个物种都存在于昆士兰州和北领地,但时间受到限制,其中,早新世晚期的种是威尼森芽孢杆菌,而中新世中期的种是达罗氏芽孢杆菌。这些物种的广泛地理分布和有限的时间跨度表明该属对于生物年代学很有用。北领地Pwerte Marnte Marnte当地动物区系中的B. wickeni记录表明,该物种居住在Eyre盆地(LEB)排水系统的西北边缘。 LEB的更南端的Oligo-中新世遗址仅包含一种鳄鱼种,澳大利亚紫红色(Australosuchus clarkae)。 B. wickeni的Pwerte Marnte Marnte发生表明,Baru和Australosuchus的分离与流域的边界不对应,古纬度是更可能的分离因素。

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