骨轮
- 网络bony ring
骨轮-
显然，眼睛没有在石化过程中存留下来，但通常情况下，眼眶周围的骨轮是眼睛大小的标志。
Obviously , eyes don 't survive the fossilization process , but a bony ring that forms around the eye socket is usually a good indicator of size .
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令古生物学者不解的是，从下孔类动物眼睛周围的骨轮可以看出，这些动物大多于夜晚行动。之前的传统观点认为，早期的哺乳动物为了躲避恐龙而成为夜行动物。
And the bony rings around synapsid eyes indicate that they mostly operated at night , which paleontologists found puzzling.Previously , the conventional wisdom held that the earliest mammals became nocturnal to avoid dinosaurian detection .