Hello there, We are happy to share our recent publication in The Anatomical Record: Frainer, G. , Plön, S. , Serpa, N. B., Moreno, I. B. and Huggenberger, S. (2018), Sound Generating Structures of the Humpback Dolphin *Sousa plumbea* (Cuvier, 1829) and the Directionality in Dolphin Sounds. Anat. Rec.. . doi: 10.1002/ar.23981 <https://doi.org/10.1002/ar.23981> You can get full access here: https://rdcu.be/bbi8p <http://em.rdcu.be/wf/click?upn=lMZy1lernSJ7apc5DgYM8dCmsSAp6-2FrUzdHjkGMQC7Q-3D_O6HXdzI2Bs0mZkjGcawip1m-2BmSirG3TOkyJWGc0hARE-2BTI0pB5nBdPVr0O7LO72bKrERVukZjkNq3XmF-2B8PxxgWx1JiZBHakCcBtJ2eTVPAvfjk7Q66kYvHLsxWKBFPv9-2B0jP0nO90wPhsNeVRwuCdXp3cokuGntgNIt4R6lRllWtMRpIhgt7fuKrrAcZZxnpl4JEABVfz-2FoQLI-2FrYrT16OF5Gou-2FObHynmz736JC1tNIa9LIOV-2B7EDkDgksJPZJIQp72Ckrf7U77qA0ujTx1A-3D-3D> Abstract: The macroscopic morphology of structures involved in sound generation in the Indian Ocean humpback dolphin (*Sousa plumbea*) were described for the first time using computed tomography imaging and standard gross dissection techniques. The Indian Ocean humpback dolphin may represent a useful comparative model to the bottlenose dolphin (*Tursiops* sp.) to provide insights into the functional anatomy of the sound production in dolphins, since these coastal dolphins exhibit similar body size and share similarities on acoustic behavior. The general arrangement of sound generating structures, that is, air sacs and muscles, was similar in both the bottlenose dolphin and the Indian Ocean humpback dolphin. The main difference between the two species existed in a small left posterior branch of the melon in the Indian Ocean humpback dolphin*,* which was not found in the bottlenose dolphin and might reflect an adaptation of directionality for high frequency communication sounds as seen in some other delphinids (e.g., *Lagenorhynchus* sp., *Grampus griseus*). Thus, this may be the main reason for the asymmetry of the sound production structures in dolphins. Additionally, the longer rostrum in Indian Ocean humpback dolphins might suggest a more directional echolocation beam compared to the Lahille's bottlenose dolphin. Anat Rec, 2018. © 2018 Wiley Periodicals, Inc. *Guilherme Frainer * Programa de Pós-Graduação em Biologia Animal (PPGBAN/UFRGS). Departamento De Zoologia. Universidade Federal do Rio Grande do Sul. Centro de Estudos Costeiros, Limnológicos e Marinhos (CECLIMAR/UFRGS). Universidade Federal do Rio Grande do Sul. <http://www.avg.com/email-signature?utm_medium=email&utm_source=link&utm_campaign=sig-email&utm_content=webmail> Livre de vírus. www.avg.com <http://www.avg.com/email-signature?utm_medium=email&utm_source=link&utm_campaign=sig-email&utm_content=webmail>. <#DAB4FAD8-2DD7-40BB-A1B8-4E2AA1F9FDF2>