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浙江天台盆地上白垩统赤城山组发现的巨型长形蛋类可鉴定为西峡巨型长形蛋(Macroelongatoolithusxi xiaensis)和一新蛋属、新蛋种——桥下巨型纺锤蛋(Megafusoolithus qiaoxiaensis oogen.etoosp.nov.)。西峡巨型长形蛋此前仅发现于河南西峡盆地,其特征为个体巨大(>35cm),蛋壳外表面具瘤点状纹饰,蛋壳锥体层与柱状层界线明显,呈波浪形,锥体层与柱状层厚度之比为1:5—1:2。已记述的产自天台的张氏巨型长形蛋(M.zhangi)和产自河南西峡盆地的西峡长圆柱蛋(Longiteresoolithus xixiaensis)均为西峡巨型长形蛋的同物异名。桥下巨型纺锤蛋的特征包括蛋壳中部外表面具有棱脊状纹饰,蛋壳锥体层与柱状层界线不明显,二者厚度之比近1:3,这些特征区别于巨型长形蛋属。目前已知巨型长形蛋科仅包含巨型长形蛋属和巨型纺锤蛋属,订正的科征为:蛋化石巨大,长径大于35cm;蛋长形,两端大致对称,长宽之比约为3:1;蛋化石在蛋窝中一般两枚为一组,呈单层圆环状排列,蛋窝直径近3m;蛋壳外表面具瘤点状或棱脊状纹饰,蛋壳由锥体层与柱状层组成。这些特征明显区别于其他类型的蛋化石,因此它们代表了一个独立的蛋科:巨型长形蛋科(Macroelongatoolithidae)。
The giant long-shaped eggs found in the Upper Cretaceous Chichengshan Formation in the Tiantai Basin of Zhejiang Province can be identified as Macroelongatoolithus xiaensis and a new egg family, Megafusoolithus qiaoxiaensis oogen. etoosp.nov.) Xixia giant long-shaped egg was only found in the Xixia Basin in Henan Province, which is characterized by a huge individual (> 35cm), the outer surface of the eggshell with dotted ornamentation, eggshell cones and columnar layer boundaries obvious wavy, cone The ratio of body layer to columnar layer thickness is 1: 5-1: 2. The described M. zhangi from Tiantai and the Longiteresoolithus xixiaensis from the Xixia Basin in Henan Province are synonymous with the Xiongxia giant asteroid. The characteristics of the giant spindles eggs under the bridge include the ridge-like ornamentation on the outer surface of the middle of the egg shell and the borderline between the conical layer and the columnar layer of the egg shell. The ratio between the two is nearly 1: 3, which is different from those of the giant long- . It is known that the giant long-toothed egg contains only giant long-shaped egg and giant spindle egg egg. Corrected subjects are: large egg fossils, long diameter greater than 35cm; egg long, symmetrical at both ends, the ratio of length to width 3: 1; egg fossils in the nest generally two as a group, was a single ring arranged in a circle, the nest diameter of nearly 3m; egg shell surface with knobby or ridged decoration, eggshell from the cone Layer and columnar composition. These traits are significantly different from other types of egg fossils, and therefore they represent an independent egg family: Macroelongatoolithidae.