06. Ascobulla ulla (Ev. Marcus & Er. Marcus, 1970) (Fig. 2F)

Material examined: Praia de Santa Rita, Extremoz, 24. VI.2009, six specimens, 2-7 mm (body length), leg M. Delgado (MZSP 97049).

Description: Cylindrical external shell, translucent and slightly calcified with flat apex. Head with a cephalic shield with two lobes divided by a deep groove. Visceral mass visible through the shell, varying from light brown to orange. Cephalic shield translucent with numerous small white dots on its surface.

Geographic distribution: Western Atlantic: Aruba, Bahamas, Belize, Bermuda, Bonaire, Cayman Islands, Costa Rica, CuraÇao, Guadeloupe, Mexico, Turks & Caicos, USA, Venezuela, Virgin Islands, Brazil (Abrolhos, Ceará, Espírito Santo, Pernambuco, Rio Grande do Norte – present study, São Paulo) (Marcus & Marcus, 1970; Mikkelsen, 1998; Rios, 2009; Galvão-Filho et al., 2015).