Earth Sciences, University of Manitoba, Winnipeg, Manitoba, Canada.
PeerJ. 2023 Aug 3;11:e15493. doi: 10.7717/peerj.15493. eCollection 2023.
Microvertebrate assemblages of the Upper Cretaceous (late Cenomanian to mid-Turonian) Favel Formation of Manitoba are formally described for the first time. New vertebrate occurrences from the Favel Formation include the actinopterygians Caturidae indet., cf. Albulidae , , , sp., , chondrichthyans cf. , , , , and , the avian cf. sp., the reptile Testudines indet., and an unknown taxon referred to as Vertebrate A. Changes in faunal occurrences throughout the formation suggest an offshore open marine environment for the lower and middle horizons and nearshore marine for the upper horizon, represent ing mid- and late stages of the Greenhorn third-order marine cycle. This newly described diversity increases biogeographic affinities of the late Cenomanian to mid-Turonian vertebrate assemblages of Manitoba with central WIS localities in South Dakota and Kansas, providing additional support for a central vertebrate biogeographic subprovince during late Cenomanian to early Turonian times, as well as WIS localities further south in Texas decreasing the gradient of the north-south or central-south community boundary during early and mid-Turonian times.
首次正式描述了来自加拿大马尼托巴省上白垩统（晚坎潘期至中阿尔比期）法韦尔组的微脊椎动物组合。来自法韦尔组的新脊椎动物包括硬骨鱼纲的不确定卡塔鱼科、疑似阿尔布鱼科、、、、、软骨鱼纲的疑似、、、、、、、疑似、爬行动物龟鳖目不确定以及被称为脊椎动物 A 的未知分类单元。整个地层中动物群的出现变化表明，下部和中部地层为近海开阔海洋环境，上部地层为近岸海洋环境，代表了绿角石三级海洋旋回的中晚期。这种新描述的多样性增加了曼尼托巴晚坎潘期至中阿尔比期脊椎动物组合与南达科他州和堪萨斯州中部 WIS 地点的生物地理亲缘关系，为晚坎潘期至早图伦期的中央脊椎动物生物地理亚区提供了额外的支持，同时德克萨斯州南部更远的 WIS 地点减少了早中阿尔比期南北社区边界的梯度。
