LATE TRIASSIC NATICID DRILLHOLES - CARNIVOROUS GASTROPODS GAIN A MAJOR ADAPTATION BUT FAIL TO RADIATE
LATE TRIASSIC NATICID DRILLHOLES - CARNIVOROUS GASTROPODS GAIN A MAJOR ADAPTATION BUT FAIL TO RADIATE
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DOI：
10.1126/science.224.4644.78
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发表时间：
1984-01-01
期刊：
影响因子：
56.9
通讯作者：
JABLONSKI, D
中科院分区：
文献类型：
--
作者：
FURSICH, FT;JABLONSKI, D
北方意大利晚三叠世卡西安组的底栖和卧栖双壳类动物含有与现代原生腹足动物非常相似的钻孔。先前报道的最古老的钻孔来自早白垩世晚期;钻井适应可能在晚三叠世出现后不久就消失了，并在1.2亿年后独立起源于另一个原生分支。因此，这种适应的感知选择价值可能并不总是一个很好的预测其长期生存，这最终是由影响物种形成和灭绝率的因素，携带它的分支。
Infaunal and reclining bivalves of the Late Triassic Cassian Formation of northern Italy contain drillholes that closely resemble those produced by modern naticid gastropods. The oldest drillholes previously reported are from the late Early Cretaceous; the drilling adaptation probably was lost soon after its appearance in the Late Triassic and originated independently in another naticid clade 120 million years later. The perceived selective value of such an adaptation may thus not always be a good predictor of its long-term survival, which is ultimately governed by factors that affect the speciation and extinction rates of the clade that carries it.