链鳄亚科(学名:Desmatosuchinae)是坚蜥目锹鳞龙科的一个亚科,包含:坚蜥类之中,所有亲缘关系接近于链鳄,而与链鳄、锹鳞龙的最近共同祖先较远的所有物种[1]。链鳄亚科的共有衍征都来自于皮内成骨(鳞甲),例如荐部前段的背部鳞甲与身体两侧鳞甲的连接方式,以及颈部、背部、尾部两侧有大型尖刺鳞甲[2]。
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