The arthropod Offacolus kingi (Chelicerata) from the Silurian of Herefordshire, England: computer based morphological reconstructions and phylogenetic affinities
The arthropod Offacolus kingi (Chelicerata) from the Silurian of Herefordshire, England: computer based morphological reconstructions and phylogenetic affinities
复制标题
来自英国赫里福德郡志留纪的节肢动物 Offacolus kingi (Chelicerata)：基于计算机的形态重建和系统发育亲缘关系
DOI：
--
复制
发表时间：
2002
期刊：
影响因子：
--
通讯作者：
P. Orr
中科院分区：
文献类型：
--
作者：
M. Sutton;D. Briggs;D. Siveter;D. Siveter;P. Orr
来自英国赫里福德郡（Herefordshire）的Wenlock系列（志留系）的小型、非生物矿化、三维保存的节肢动物Offacolus kingi Orr等人被重新评估，并建立了新的Offacolidae家族。这项新的研究是基于连续研磨的标本，用计算机重建，并以彩色模型的形式渲染。Offacolus具有与limus相似的前体附属物阵列，但在附属物II-V上也具有与其他节肢动物不同的坚固和刚毛的外足。视质体附属物在数量和形态上与鲎的书鳃相似。分支分析认为Offacolus属于螯角目，是泛翅目和现存螯角目的姐妹分类群，但比泥盆纪的Weinbergina衍生得更多。
The small, non–biomineralized, three–dimensionally preserved arthropod Offacolus kingi Orr et al. from the Wenlock Series (Silurian) of Herefordshire, England, is re–evaluated, and the new family Offacolidae erected. This new study is based on specimens which have been serially ground, reconstructed by computer and rendered in the round as coloured models. Offacolus possesses a prosomal appendage array similar to that of Limulus, but also bears robust and setose exopods on appendages II–V which are unlike those found in any other arthropods. Opisthosomal appendages are similar in number and morphology to the book–gills of Limulus. Cladistic analysis places Offacolus basally within the Chelicerata, as a sister taxon to the eurypterids and extant chelicerates, but more derived than the Devonian Weinbergina.