Abstract
ABSTRACT The deep-water Naticidae Guilding, 1834 collected in the expedition MD55 off SE Brazil are taxonomically studied; of the eleven species found, nine species and one genus are new. Microlinices n. gen., mainly characterized by its minute shell size (5–8 mm), thick unpigmented shell walls, weak callus, umbilicus wide lacking central fold, corneous operculum, absence of eyes, osphradium somewhat peduncular, penis at right of or ventral to right cephalic tentacle, nerve ring highly concentrated, and found in deepwater environment. The following taxa are studied here: Microlinices latiusculus n. gen., n. sp., the type species, off Rio de Janeiro (RJ), 430–450 m (anatomy included); M. ibitingus n. gen., n. sp., off Espirito Santo (ES) and RJ, 640–1575 m (anatomy included); M. benthovus n. gen., n. sp., same distribution, 607–1575 m (anatomy included); M. ombratus n. gen., n. sp., off ES, 1500–1575 m; M. apiculus n. gen., n. sp., off ES, 367 m; M. gaiophanis n. gen., n. sp., off RJ, 830 m; Natica jukyriu...
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