The most ancient spiral galaxy discovered to date.
We thank the anonymous referee for his/her report, which helped to restructure and improve the work significantly. This work is a tribute to the late Peter McGregor who built NIFS/Gemini and taught TY how to reduce the NIFS data. This research was conducted by the Australian Research Council Centre of Excellence for All Sky Astrophysics in 3 Dimensions (ASTRO 3D), through project number CE170100013. TY thanks useful discussions with Ken Freeman, Lars Hernquist, Enrico Teodoro, Yusuke Fujimoto, Ben Davis and the GEARS3D group. TY acknowledges the support from the ASTRO 3D fellowship. BG gratefully acknowledges the support of the Australian Research Council as the recipient of a Future Fellowship (FT140101202). CF acknowledges funding provided by the ARC Discovery Pro jects (grants DP150104329 and DP170100603). JR acknowledges support from the ERC starting grant 336736-CALENDS. LK gratefully acknowledges support from an Australian Research Council (ARC) Laureate Fellowship (FL150100113). RC acknowledges grants NNX12AF91G and AST15-15389. YB acknowledges ISF grant 1059/14. We thank Stuart Ryder for his assistance with the Gemini observations. The data for this work is based on observations obtained at the Gemini Observatory, which is operated by the Association of Universities for Research in Astronomy, Inc., under a cooperative agreement with the NSF on behalf of the Gemini partnership: the National Science Foundation (United States), the National Research Council (Canada), CONICYT (Chile), Ministe- rio de Ciencia, Tecnologia e Innovacion Productiva (Argentina), and Ministerio da Ciencia, Tecnologia e Inovacao (Brazil). The authors wish to recognize and acknowledge the very significant cultural role and reverence that the summit of Mauna Kea has always had within the indigenous Hawaiian community.