当前位置: X-MOL 学术Mar. Micropaleontol. › 论文详情
Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)
The marine ostracod genus Tasmanocypris from the Neogene of southeastern Australia: Systematic and palaeoceanographical relationships, palaeoecology and palaeobiogeography
Marine Micropaleontology ( IF 1.9 ) Pub Date : 2020-05-01 , DOI: 10.1016/j.marmicro.2020.101855
Mark T. Warne

Abstract A new fossil paracypridine ostracod, Tasmanocypris lochardi sp.nov. is described from late Miocene shallow marine strata of southeastern Australia. It has morphological features similar to a number of modern southern Australian and southwest African Tasmanocypris species, here termed the dartnalli-group. This species group was likely present in early Cenozoic temperate, shallow seas around Antarctica. The first appearance of Tasmanocypris lochardi in late Miocene marine strata of the Bass Strait hinterland of SE Australia, equates to a late Miocene (9–7 Ma) intensification and northward latitudinal shift of the Antarctic Circumpolar Current (ACC). Late Miocene occurrences of Tasmanocypris lochardi in southeast Australia were likely associated with temperate eastward flows of the ACC north of the Subantarctic Front. During the early Pliocene, the warm Zeehan Current (aka Leeuwin Current) replaced the ACC as the dominant easterly flowing current across Bass Strait, and this 4.4 Ma palaeoceanographical event correlates with the temporary, but widespread disappearance of T. lochardi from southeast Australian marine waters. However, the presence of refugia populations of T. lochardi along the east Australian continental shelf between 4.4 and 3.4 Ma, likely enabled the brief re-establishment of T. lochardi in the east of Bass Strait during the late Pliocene (3.2–3.0 Ma). Tasmanocypris lochardi became permanently extinct in this region during the latest Pliocene to early Pleistocene (

中文翻译:

来自澳大利亚东南部新近纪的海洋介形类 Tasmanocypris:系统和古海洋学关系、古生态学和古生物地理学

摘要 一种新的化石paracypridine ostracod,Tasmanocypris lochardi sp.nov。来自澳大利亚东南部的晚中新世浅海地层。它的形态特征类似于许多现代澳大利亚南部和非洲西南部的 Tasmanocypris 物种,这里称为 dartnalli-group。该物种组可能存在于南极洲周围的早新生代温带浅海。Tasmanocypris lochardi 在澳大利亚东南部巴斯海峡腹地晚中新世海相地层中的首次出现,相当于中新世晚期(9-7 Ma)的强化和南极环极流(ACC)的北纬移动。Tasmanocypris lochardi 在澳大利亚东南部的晚中新世出现可能与亚南极锋以北的 ACC 的温带东流有关。在上新世早期,温暖的 Zeehan 洋流(又名 Leeuwin 洋流)取代了 ACC,成为横跨巴斯海峡的主要东流,这个 4.4 Ma 的古海洋事件与澳大利亚东南部海域的 T. lochardi 暂时但广泛的消失有关. 然而,在 4.4 到 3.4 Ma 之间,沿着澳大利亚东部大陆架的 T. lochardi 避难种群的存在,可能使 T. lochardi 在上新世晚期(3.2-3.0 Ma)期间在巴斯海峡东部短暂重建. Tasmanocypris lochardi 在最新上新世至早更新世期间在该地区永久灭绝(4 Ma 古海洋学事件与澳大利亚东南部海域的 T. lochardi 暂时但广泛的消失有关。然而,在 4.4 到 3.4 Ma 之间,沿着澳大利亚东部大陆架的 T. lochardi 避难种群的存在,可能使 T. lochardi 在上新世晚期(3.2-3.0 Ma)期间在巴斯海峡东部短暂重建. Tasmanocypris lochardi 在最新上新世至早更新世期间在该地区永久灭绝(4 Ma 古海洋学事件与澳大利亚东南部海域的 T. lochardi 暂时但广泛的消失有关。然而,在 4.4 到 3.4 Ma 之间沿着澳大利亚东部大陆架存在 T. lochardi 避难种群,可能使 T. lochardi 在上新世晚期(3.2-3.0 Ma)在巴斯海峡东部短暂重建. Tasmanocypris lochardi 在最新上新世至早更新世期间在该地区永久灭绝(0 马)。Tasmanocypris lochardi 在最新上新世至早更新世期间在该地区永久灭绝(0 马)。Tasmanocypris lochardi 在最新上新世至早更新世期间在该地区永久灭绝(
更新日期:2020-05-01
down
wechat
bug