A re-examination of fossil material from the Late Cretaceous Cambridge Greensand Member (CGM) of the West Melbury Marly Chalk Formation revealed a number of new specimens of edentulous pterosaur jaw fragments previously identified as shark fin spines and fish jaws and accessioned under the epithet ‘cestraciontid finray’ and ‘jaws of fish’. These are now recognised as pterosaurian jaw tips and referred to Ornithostoma sedgwicki Seeley, 1891 and Azhdarchoidea indet. This material increases the diversity of edentulous pterosaurs from the CGM.

The edentulous pterosaur Ornithostoma sedgwicki Seeley, 1891 from the Cretaceous Cambridge Greensand of eastern England is reviewed. The holotype specimen is confirmed as a fragment of a premaxilla/maxilla of a non-tapejarid azhdarchoid on account of the conspicuous curvature of the dorsal and occlusal margins posteriorly and the presence of small neural foramina on the lateral margins. Neural foramina are not seen on jaws of members of the Pteranodontia, a group to which O. sedgwicki was included previously. The referral of O. sedgwicki to Azhdarchoidea eliminates the single known Lower Cretaceous occurrence of Pteranodontidae, restricting the temporal range of this taxon to the Upper Cretaceous. Postcranial material referred to O. sedgwicki from the type horizon is regarded as indeterminate Pterosauria.

对西梅尔伯里马利粉笔组晚期白垩纪剑桥格林沙成员（CGM）的化石材料的重新检查发现了许多无牙翼龙颚骨碎片的新标本，先前被鉴定为鲨鱼鳍刺和鱼颚骨，并以“ est鳍和'鱼颚'。这些现在被认为是翼龙的颚尖，被称为Ornithostoma sedgwicki Seeley，1891年和Azhdarchoidea indet。这种材料增加了CGM的无齿翼龙的多样性。

审查了无齿翼龙Ornithostoma sedgwicki Seeley，1891年从英格兰东部的白垩纪剑桥格林桑德分校。由于后缘和咬合边缘的明显弯曲以及在侧缘上存在小的神经孔，整型标本被确认为非tapejarid azhdarchoid的上颌/上颌的片段。在翼龙目成员的颌骨上看不到神经孔，该组织以前包括O. sedgwicki。O. sedgwicki转介给Azhdarchoidea消除了已知的白垩纪下翼龙科的发生，从而限制了该分类群在上白垩纪的时间范围。颅骨后材料称为O. sedgwicki 从类型上看是不确定的翼龙。