Calliostomatidae, Colloniidae, Margaritidae, and Solariellidae (Gastropoda: Trochoidea) collected by the Marion Dufresne (MD 55) expedition in southeastern Brazil, with description of a new species of Calliostoma Author Cavallari, Daniel C. Author Salvador, Rodrigo B. Author Dornellas, Ana P. S. Author Simone, Luiz R. L. text Zootaxa 2019 2019-05-24 4609 3 401 428 journal article 26678 10.11646/zootaxa.4609.3.1 c80bd1b6-a3cc-4c22-94fd-e231913ac8d5 1175-5326 3227892 F38E6655-0EC4-48E1-A002-CAC599F3556D Gaza compta Simone & Cunha, 2006 ( Fig. 6 G–I) Gaza compta Simone & Cunha, 2006 : 4 , figs 1–10, 49–52, 67–77, 92. Type material. Holotype : MZSP 40324 . Paratypes : MZSP 40325 , 5 spm; ANSP 413312, 1 sh; MNRJ 10531, 1 sh; ZSM 20060173, 1 sh, all from type locality . Type locality. Brazil , Rio de Janeiro , off Cabo Frio , 22º53’S 42º01’W , 700–800 m depth (otter trawl, i/2004 . C.M. Cunha leg.) . Previously known distribution. Known only from type locality, 800–900 m (live specimens). New occurrence. Off Espírito Santo , Abrolhos Slope, down to 940 m depth (shells only). Material examined. Additional material: Brazil : Espírito Santo : off São Mateus , Abrolhos Slope , 18°59’S , 37°48’W , MD55 , sta. DC73, 607– 620 m , MNHN , 1 sh ( 27/v/1987 ); 19°36’S , 38°53’W , MD55 sta. CB 93, 640 m , MNHN , 1 sh ( 30/v/1987 ); 19°40’S , 37°48’W , MD55 sta. CB77 , 790– 940 m , MNHN , 1 sh ( 27/v/1987 ). Additional non-MD55 material : Brazil : Rio de Janeiro : holotype . Measurements. ~5¾ whorls, H= 10.2 mm , D= 14.1 mm (largest juvenile specimen). Remarks. The MD 55 specimens are all juvenile and fragmentary but retain enough conchological features to allow identification, such as the faintly purple-colored initial teleoconch whorls that also show well-marked axial undulations, the overall shell profile, and the compatible height/width ratio (~1.45 according to Simone & Cunha 2006 ). The new records from the MD55 expedition presented herein are the first published since the original description and expand the range of the species ca. 470 km to the north. The bathymetric range is also expanded from the previously known maximum depth of 800 m to 940 m .