Gastropods from the Burdwood Bank (southwestern Atlantic): an overview of species diversity Author Luca, Javier Di Author Zelaya, Diego G. text Zootaxa 2019 2019-01-10 4544 1 41 78 journal article 27685 10.11646/zootaxa.4544.1.2 2f89f82f-be57-45b4-ad3c-ed72a7647551 1175-5326 2618137 211842AA-6C98-425B-9377-1AF0DC78C893 Microdeuthria michaelseni (Strebel, 1905) Fig. 3J Euthria ( Pareuthria ) michaelseni Strebel, 1905b : 621 , pl. 21, figs. 6, 6a–b Microdeuthria michaelseni — Pastorino, 2016 : 337 , figs. 27A–O, 28A–G ( syntypes , synonymy, protoconch and radula) Examined material. 7 sh. (MACN-In 40684). Description. Shell height to 6.8 mm (up to 11 mm according to Pastorino 2016 ); elongate-fusiform, moderately solid. Protoconch large, of 2.25 slightly convex whorls, the first slightly keeled. Teleoconch of up to 2.75 whorls, almost straight in outline; last whorl comprising about 70% of total shell height. Suture impressed. Surface brownish, with a paler band at the middle of the last whorl and at the suture of the spire whorls; sculptured with 7 to 10 fine spiral grooves on the spire whorls and about 40 on the last whorl. Aperture ovate; columellar callus narrow; siphonal canal short, somewhat oblique, wide.