封面说明： 中三叠世安尼期云南罗平生物群龙鱼属一新种，披刺龙鱼 (Saurichthys spinosa sp. nov.)。这种小型龙鱼身披两列平行的具强壮棘刺的针状侧鳞，代表着龙鱼类新的适应策略——底栖生活及其相应的形态变化。披刺龙鱼可能以较小的虾等底栖甲壳类为食；与食鱼的同类相比，它代表着中三叠世龙鱼类辐射演化阶段在营养生态位上的分化。详见本期吴飞翔等人文 (p. 273)。 ( 绘图：杨定华 )
Cover image: A new species of Saurichthys, Saurichthys spinosa sp. nov. from the Anisian (Middle Triassic) Luoping biota of Yunnan, is a small-sized saurichthyid fish characterized by two paralleling needle-like ?anks scales provided with strong spines. It shows a series of morphological modifcations, which probably underlies a novel bottom-dwelling life. Given a small body size, it might feed on the coexisting small shrimps or other crustaceans, and hence representing the trophic disparity from other fish-eating saurichthyid fishes during the radiating evolutionary stage of the group in the Middle Triassic. See details in the paper of Wu et al. (p. 273). (Illustrated by Yang Ding-Hua)