Dear colleagues Ewan and I are very pleased to announce a new paper - describing a new genus and species of baleen whale from the Oligocene of New Zealand - *Toipahautea waitaki*. Tsai CH and Fordyce RE 2018. A new archaic baleen whale *Toipahautea waitaki* (early Late Oligocene, New Zealand) and the origins of crown Mysticeti. *Royal Society Open Science *5: 172453 Abstract A new genus and species of extinct baleen whale †*Toipahautea waitaki *(Late Oligocene, New Zealand) is based on a skull and associated bones, from the lower Kokoamu Greensand, about 27.5 Ma (local upper Whaingaroan Stage, early Chattian). The upper jaw includes a thin, elongate and apparently toothless maxilla, with evidence of arterial supply for baleen. Open sutures with the premaxilla suggest a flexible (kinetic) upper jaw. The blowhole is well forward. The mandible is bowed laterally and slightly dorsally; unlike the Eomysticetidae, there are no mandibular alveoli, and the coronoid process is tapered and curved laterally. Jaw structure is consistent with baleen-assisted gulp-feeding. The age of early Chattian makes †*Toipahautea* a very early, if not the oldest named, toothless and baleen-bearing mysticete, suggesting that the full transition from toothed to baleen-bearing probably occurred in the Early Oligocene. Late Oligocene mysticetes vary considerably in jaw form and kinesis, tooth form and function, and development of baleen, implying a wide range of raptorial, suctorial and filter-feeding behaviour. More study may elucidate the function of jaws, teeth and baleen in terms of opportunist/generalist feeding, as in modern gray whales, versus specialized feeding. We here propose that early mysticetes, when transitioned from toothed to baleen-bearing, were generalists and opportunists instead of specializing in any forms of feeding strategies. In addition, two different phylogenetic analyses placed †*Toipahautea* either in a polytomy including crown Mysticeti, or immediately basal to the crown, and above †Eomysticetidae in both cases. Because the †*Toipahautea waitaki* holotype is an immature individual, it may plot more basally in phylogeny than its true position. This is an open-access paper and you should be able to download the full text at: http://rsos.royalsocietypublishing.org/content/5/4/172453#disqus_thread Alternatively, please feel free to email me for a pdf copy at: craniata@gmail.com; whaletsai@ntu.edu.tw; cheng-hsiu.tsai@otago.ac.nz Regards and all the best, Tsai 蔡政修（Cheng-Hsiu Tsai さい まさのぶ) Lab of evolution and diversity of fossil vertebrates（古脊椎動物演化及多樣性實驗室） Department of Life Science, National Taiwan University（台灣大學生命科學系） No. 1, Sec. 4, Roosevelt Rd., Taipei, 106-17, Taiwan（台灣 106-17 台北市羅斯福路 4 段 1 號） Email: whaletsai@ntu.edu.tw; craniata@gmail.com; cheng-hsiu.tsai@otago.ac.nz