• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Journal of Systematic Palaeontology >New semionotiform (Actinopterygii: Neopterygii) from the Late Jurassic of southern Germany
【24h】

New semionotiform (Actinopterygii: Neopterygii) from the Late Jurassic of southern Germany

机译：来自德国南部侏罗纪晚期的新的拟似鸟类（Actinopterygii：Neopterygii）

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

We report on a new semionotiform taxon, Scheenstia zappi gen. et sp. nov., from Schamhaupten in the Late Jurassic limestones of the Franconian and Swabian Alb, southern Germany. Although the taxon is so far represented by a single specimen, excellent preservation allows a detailed description of its skeletal anatomy. Scheenstia zappi is distinguished by the presence of a sensory canal in the supraorbital bones and a saddle-like articular surface in the quadratojugal, both features so far unknown in other semionotiforms. The new taxon is further diagnosed by a unique combination of characters: more than three pairs of extrascapular bones; frontals less than three times longer than their maximal width; semitritorial dentition; four anterior infraorbitals; middle pit line contained in a groove in the dermopterotic and parietal; concave posterior border of the angular, robust bugle-like process of the posttemporal bone; large basal fulcra; eleven fin rays in the lower lobe of the caudal fin (below the lateral line); and a first, scale-like caudal fin ray reduced. Among semionotiforms it most closely resembles Lepidotes, in particular the large tritorial forms of the Late Jurassic and Early Cretaceous of Europe, such as L mantelli, L. maximus and L. laevis. The peculiar shape of the quadratojugal in Scheenstia zappi resembles the condition in some basal teleosts in which a ventral articular surface of the quadrate probably served in the rotation of the lower jaw.
机译：我们报告了一种新的半单形分类单元，Scheenstia zappi gen。等。 11月，来自德国南部法兰克和斯瓦比亚Alb侏罗纪晚期石灰岩中的Schamhaupten。尽管到目前为止，该分类单元仅由单个标本代表，但出色的保存可以对其骨骼解剖结构进行详细描述。 Scheenstia zappi的特征是在眶上骨骼中存在感觉管，而在四趾颌中存在鞍状关节表面，这两个特征在其他半卵形动物中尚属未知。新的分类单元通过字符的独特组合来进一步诊断：超过三对肩cap骨；额线小于最大宽度的三倍；半三叉戟牙列四个前眶下;皮下和顶突沟中的中坑线；颞后角的有角，坚固的号角状过程的凹后边界；大基底ful骨尾鳍下叶中的十一条鳍条射线（在侧线下方）；并减少了鳞片状尾鳍。在半蛋形动物中，它最类似于鳞翅目，特别是欧洲的侏罗纪晚期和白垩纪早期的大型三部曲形式，例如芒特里（L. mantelli），马克西姆斯（L. maximus）和莱维斯（L. laevis）。 Scheenstia zappi的四头颌骨的奇特形状类似于某些基底硬骨的情况，其中四头肌的腹侧关节面可能在下颌的旋转中起作用。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号