Although the type species of Ophiopsis was long considered O. procera, the genus originally included the single species Ophiopsis muensteri, which subsequent authors moved to Furo. Following the International Commission on Zoological Nomenclature code, Furo muensteri is here recognized as the type species of Ophiopsis by monotypy (Article 68.3). Ophiopsiella, gen. nov., is erected to include all remaining previously described ‘Ophiopsis’ species. Exceptionally well preserved new Ophiopsiella attenuata from the Upper Jurassic plattenkalk of Ettling (Bavaria, Germany) represents the first record of this species from Ettling, allowing for a partial revision of it and Ophiopsiella procera. New evidence allows for an emended diagnosis of Ophiopsiella attenuata, which differs from all other Ophiopsidae in the following combination of features: 27–28 dorsal fin rays, 42 vertical scale rows, and a long, low, posteroventrally inclined dorsal fin lacking elongate anterior fin rays or a strongly concave posterior border. A neotype for O. attenuata is designated, as the type is lost. ‘Ophiopsis’ attenuata actually contains two anatomically different morphotypes corresponding to distinct species, one of which is indistinguishable from ‘Ophiopsis’ procera. Exceptional preservation of the new material provides new morphological information, particularly regarding the dermal cranial bones. This revision changes the known distribution of ophiopsids in the Upper Jurassic of southern Germany and France, with possible broader paleobiogeographic and paleoecological implications for this region during the Late Jurassic. Ophiopsids remain poorly known compared with other halecomorphs (e.g., Amiidae), and closer investigation of their morphology and taxonomic relationships is therefore important to understanding broader patterns of halecomorph evolution.