Siveter David J, Siveter Derek J, Sutton Mark D, Briggs Derek E G
Department of Geology, University of Leicester, Leicester LE1 7RH, UK.
Proc Biol Sci. 2007 Feb 22;274(1609):465-9. doi: 10.1098/rspb.2006.3756.
An exceptionally preserved new ostracod crustacean from the Silurian of Herefordshire, England, preserves eggs and possible juveniles within its carapace, providing an unequivocal and unique view of parental brood care in the invertebrate fossil record. The female fossil is assigned to a new family and superfamily of myodocopids based on its soft-part anatomy. It demonstrates a remarkably conserved egg-brooding reproductive strategy within these ostracods over 425 Myr. The soft-tissue anatomy urges extreme caution in classifying 'straight-hinged' Palaeozoic ostracods based on the carapace alone and fundamentally questions the nature of the shell-based Palaeozoic ostracod record.
来自英国赫里福德郡志留纪的一种保存异常完好的新介形甲壳动物，在其甲壳内保存着卵和可能的幼体，为无脊椎动物化石记录中的亲代育雏行为提供了明确且独特的视角。根据其软组织解剖结构，该雌性化石被归入介形亚纲速足介目的一个新科和新超科。它展示了在超过4.25亿年的时间里，这些介形类动物中一种极为保守的孵卵繁殖策略。软组织解剖结构促使人们在仅基于甲壳对“直铰式”古生代介形类进行分类时要格外谨慎，并从根本上质疑基于外壳的古生代介形类记录的本质。
