Addisonia enodis (Vetigastropoda: Lepetelloidea) associated with an elasmobranch egg capsule from the South Atlantic Ocean and the discovery of the species from deep waters off northeastern Brazil

Abstract

A gastropod specimen of the subfamily Addisoniinae Dall, 1882 is reported here for the first time associated with an elasmobranch egg capsule from the South Atlantic Ocean. A specimen of Addisonia enodis Simone, 1996 was found living inside an egg capsule of Atlantoraja castelnaui (Miranda Ribeiro, 1907) (Arhynchobatidae Fowler, 1934) from shallow waters off southeastern Brazil. Previous studies have reported the association of members of the genus Addisonia Dall, 1882 only with the egg capsules of sharks from the family Scyliorhinidae Gill, 1862 and skates from the family Rajidae de Blainville, 1816. Other specimens of A. enodis are also here reported to occur off northeastern Brazil based on shells found in deep waters off the state of Sergipe, which fills a gap in its distribution in the Southwestern Atlantic to the north of this region. Addisonia enodis was recognized as a synonym of A. excentrica (Tiberi, 1855). However, we consider A. enodis as a valid species until further data clarify this issue based on a large sample of Addisonia from Brazilian waters.

The Mollusca of Galicia Bank (NE Atlantic Ocean)

“…from 110 to 293 m, andMcLean (1985) recorded it from 119 to 1170 m, deepest records being probably shells. Addisonia enodis Simone, 1996, described from Brazil, was recorded alive down to 184 m(Simone 1996;Lima et al 2016) and theNE Pacific A. brophyi McLean, 1985 from 155 to 174 m depth. Besides, this is the first record of an Addisonia species living inside a holocephalan egg-capsule.…”