Ichthyerpeton bradleyae (Huxley in Wright and Huxley, 1866) is one of the seven tetrapods originally described by Huxley from the Jarrow Assemblage (Pennsylvanian, Langsettian Regional Substage equated with the Bashkirian International Stage) in south-eastern Ireland. The holotype, one of only two specimens considered to represent the taxon, consists of the postcranial skeleton, which has been highly compressed and has undergone extensive replacement of bone by carbonaceous material. The holotype is studied using microcomputed tomography, which reveals that the vertebral column has at least 25 diplospondylous vertebrae with cylindrical centra. Neural arches and a haemal arch are described for the first time. Neural arches in the caudal region are paired and neural spines only contact one another dorsally. The hemal arch is fused and wraps around the ventral margin of the centrum. A stout femur and tibia are described. The morphology of the femur is unique for early tetrapods, with fibular and tibial condyles of similar length and lacking an adductor crest. The morphology of the femur, and its length relative to the tibia, suggests that the holotype of I. bradleyae preserves an immature individual. The tibia is a flat bone characteristic of stem tetrapods. Phalanges from the right and left pes are present. Because the phalanges are disarticulated, a phalangeal count cannot be determined. Despite the new anatomical information, the systematic position of I. bradleyae is still difficult to establish; however, it does not belong within the colosteids, temnospondyls, or embolomeres, to which it has previously been assigned.

中文翻译：

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爱尔兰宾夕法尼亚人早期四足动物 Ichthyerpeton bradleyae (Huxley in Wright and Huxley, 1866) 正模标本的微型计算机断层扫描

布拉氏鱼（赫胥黎在赖特和赫胥黎，1866 年）是赫胥黎最初描述的七个四足动物之一，来自爱尔兰东南部的 Jarrow Assemblage（宾夕法尼亚州，Langsettian 区域亚阶段，等同于 Bashkirian 国际阶段）。正模标本是被认为代表该分类群的仅有的两个标本之一，由颅后骨骼组成，该骨骼已被高度压缩，并已被碳质材料广泛替代骨骼。使用微型计算机断层扫描对正模进行研究，结果显示脊柱至少有 25 个具有圆柱形中心的双脊椎椎骨。首次描述了神经弓和血管弓。尾部区域的神经弓是成对的，神经棘只在背部相互接触。血管弓融合并包裹在中心的腹侧边缘。描述了粗壮的股骨和胫骨。早期四足动物的股骨形态是独特的，腓骨和胫骨髁的长度相似，没有内收肌嵴。股骨的形态及其相对于胫骨的长度表明，I. 布拉氏菌保留一个不成熟的个体。胫骨是茎四足动物的扁平骨特征。存在来自右侧和左侧 pes 的趾骨。由于指骨关节分离，无法确定指骨计数。尽管有新的解剖学信息，I. 布拉氏菌仍然难以成立；然而，它不属于之前分配的结肠、椎骨或栓子。