Avimaia is a genus of fossil birds of the Enantiornithes clade [2] that lived about 115 million years ago in Northwest China. [1] The only known species is A. schweitzerae. [1]

慈母鸟属 （学名： Avimaia）为 蜥臀目 的一个 属。 [1] 該属已灭绝。 該屬生活在大约1.15亿年前的中国西北地区。 目前已知的該屬唯一物种是A. schweitzerae。 [2]

2019年3月20日 · Here we describe a new enantiornithine, Avimaia schweitzerae gen. et sp. nov., from the Lower Cretaceous Xiagou Formation with an unlaid egg two-dimensionally preserved within the...

2019年3月22日 · Her team came across the deceased mother bird, which has been indentified as a new prehistoric species called Avimaia schweitzerae. According to a press release, when they extracted a bit of the...

该标本发现于中国甘肃玉门市，距今 1.1 亿年的早白垩世下沟组的湖相沉积物中，是一个全新的属种，被命名为施氏慈母鸟（Avimaia schweitzerae）。 标本保存在扁平的页岩内，头部虽然残缺，但是，体腔内基本成型的蛋壳（包括表层膜、角质层等）却被罕见地保存至今。 组织切片和扫描电镜结果显示，蛋壳异常纤薄，呈现了双层的病态结构（这也是首次在反鸟蛋化石中发现双壳），研究人员据此推测这只雌鸟在产卵时出现了现生爬行类所常见的“挟蛋症”，即鸟蛋未能及 …

该标本出土于早白垩世下沟组的湖相沉积物中，是一个全新的种属，被命名为施氏慈母鸟（Avimaia schweitzerae）。 标本头部虽然残缺，但是，体腔内基本成型的蛋壳（包括表层膜、角质层等）却被罕见地保存至今。

2019年3月20日 · Understanding non-crown dinosaur reproduction is hindered by a paucity of directly associated adults with reproductive traces. Here we describe a new enantiornithine, Avimaia schweitzerae gen. et...

2019年3月20日 · Here we describe a new enantiornithine, Avimaia schweitzerae gen. et sp. nov., from the Lower Cretaceous Xiagou Formation with an unlaid egg two-dimensionally preserved with …

2019年3月20日 · Understanding non-crown dinosaur reproduction is hindered by a paucity of directly associated adults with reproductive traces. Here we describe a new enantiornithine,Avimaia schweitzeraegen. et sp. nov., from the Lower Cretaceous Xiagou Formation with an unlaid egg two-dimensionally preserved within the abdominothoracic cavity.

2019年3月20日 · About 110 million years ago, a sparrow-sized bird died with her egg still inside her body. That egg, crushed and flattened by pressure over time, is the first unlaid bird egg known to be preserved...