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 Diaphana paessleri (Strebel, 1905) Fig. 5K Utriculus paessleri Strebel, 1905b : 577 , pl. 22, figs. 34, 34a Diaphana paessleri — Schiøtte, 1998 : 90 , figs. 9–10, 11a–i, 19e ( holotype , synonymy, protoconch and radula) Examined material. 1 an. and 8 sh. (MACN-In 40706). Description. Shell height to 3 mm (up to 3.3 mm according to Schiøtte 1998 ); ovate, delicate. Protoconch tilt, translucent in well-preserved specimens, of 1.25 markedly convex whorls. Teleoconch of up to 2 whorls, slightly convex in outline, with prominent shoulder; last whorl comprising about 85% of total shell height. Suture deep, slightly channeled. Surface white; only sculptured with faint growth lines. Aperture elongate-ovate, interior white; columellar callus narrow, expanded over the umbilical area. Umbilicus open, narrow, delimited by a thin rim.