THE ONTOGENY OF PTERANODON AND OTHER PTEROSAURS
THE ONTOGENY OF PTERANODON AND OTHER PTEROSAURS
复制标题
DOI：
10.1017/s0094837300012331
复制
发表时间：
1993-12-01
期刊：
影响因子：
2.7
通讯作者：
BENNETT, SC
中科院分区：
文献类型：
--
作者：
BENNETT, SC
白垩纪晚期翼龙翼龙的未成熟标本使用三个与尺寸无关的标准进行鉴定：（1）各种颅骨和颅后元素的融合； (2)骨骺骨化程度； (3) 骨颗粒或肢体骨干的骨化程度。未成熟个体占无齿翼龙现有标本的 15%，其大小与成熟个体没有显着差异。这以及成熟骨骼的广泛融合表明无齿翼龙具有确定的生长。未成熟个体的肢骨干的骨骼是纤维板层骨，这表明它们迅速生长到成年大小。与大小无关的标准也可用于识别其他翼龙类群的未成熟和成熟个体，并且其他大型翼手龙也可能表现出快速确定的生长。
Immature specimens of the Late Cretaceous pterosaur Pteranodon were identified using three size-independent criteria: (1) fusion of various cranial and postcranial elements; (2) degree of epiphyseal ossification; and (3) bone grain or degree of ossification of limb-bone shafts. Immature individuals make up 15% of available specimens of Pteranodon and do not differ significantly in size from mature individuals. This and the extensive fusion of the mature skeleton suggest that Pteranodon had determinate growth. The bone of limb-bone shafts of immature individuals is fibro-lamellar bone, which suggests that they grew rapidly to adult size. The size-independent criteria can also be used to identify immature and mature individuals of other pterosaur taxa, and other large pterodactyloids also probably exhibited rapid determinate growth.