Taxonomical study on the mollusks collected in Marion-Dufresne (MD 55) and other expeditions to SE Brazil: the Fissurellidae (Mollusca, Vetigastropoda) Author Simone, Luiz Ricardo L. Author Cunha, Carlo M. text Zootaxa 2014 3835 4 437 468 journal article 10.11646/zootaxa.3835.4.2 01da15e5-14ca-4506-89fd-2055b906f4ff 1175-5326 249622 F492B5ED-0CA7-436B-94AF-EE4C99D630AF Emarginula suspira new species Figures 90–102 Emarginula tuberculosa : Leal, 1991 : 41 (pl. 2, fig. F); Rios, 2009 : 27 (fig. 49) (part) (non Libassi, 1859 ). Emarginula sp 1: Leal, 1991 : 42 (fig. 2G). Types . Holotype MNHN 25310. Paratypes : MNHN 25311, 16 shells, MZSP 102932 , 5 shells, MZSP 102939 , 2 shells, MNRJ 25959, 3 shells, all from type locality. Brazil . Espírito Santo (MD55; Bouchet, Leal & Métivier col); off Itaúnas, continental slope of Abrolhos, 18°59’S 37°48’W , 607–620 m , MNHN 25312, 5 shells (sta. DC73; 27/ v/1987 ); off Regência, 19°40’S 37°48’W , 790–940 m , MNHN 25313, 2 shells, MZSP 102921 , 1 shell (sta. CB77; 27/v/1987 ); off Conceição da Barra, 18°58’S 37°49’W , 637 m , MNHN 25314, 1 shell (sta. CB76; 27/v/1987 ); Jaseur Seamount, 20°27’S 35°54’W , 54 m , MNHN 25315, 1 shell (sta. DC34; 15/v/1987 ); Montague Seamount, 20°26’S 36°41’W , 310–350 m , MNHN 25316, 1 shell (sta. CB79; 14/v/1987 ). FIGURES 100–102: Emarginula suspira n. sp. paratype MZSP 102932 in SEM (L 4.0 mm). Fig. 100: right view. Fig. 101: dorsal-slightly right view. Fig. 102: ventral view. FIGURES 103–108: Manganesepta atiaia , n. sp . Fig. 103: paratype MZSP 102946 (L 5.4 mm), dorsal view. Fig. 104: holotype MNHN 25317 (L 3.5 mm), right view. Fig. 105: same, dorsal view. Fig. 106: same, ventral view. Fig. 107: same, ventral-slightly left view. Fig. 108: same, right view, detail of apex (left side = 0.6 mm). FIGURES 109–115: Profundisepta denudata , n. sp. , holotype MZSP 105507 (L 3.0 mm). Fig. 109: dorsal view. Fig. 110: left view. Fig. 111: detail of apex and foramen, dorsal view (upper side= 0.8 mm). Fig. 112: ventral view. Fig. 113: ventralslightly left view. Fig. 114: right view. Fig. 115: detail of apex, right view (L 1.2 mm). Type locality. Brazil . Espírito Santo; off Itaúnas, continental slope of Abrolhos, 18°59’S 37°50’W , 295 m (MD55 sta. DC75; Bouchet, Leal & Métivier col., 27/v/1987 ). Diagnosis. Apex greatly curved inwards, located posteriorly, close to posterior apertural lip. Height ca. 40% of length. Sculpted by ca. 40 radial cords, regularly interrupted by concentric, less developed cords, forming nodes at intersections; mostly alternating wide and narrow cords. Slit ca. 30% of shell length. Description. Shell size up to 7 mm ; low, limpet-like; height ca. 40% of length. Pure white (Figs 93–95), ca. 10% of specimens with some pale beige pigmentation. Protoconch of 1.5 rounded whorls (Figs 91, 92); situated on right (Figs 94, 97); smooth, glossy; size 230 µm. Slit anterior, rectangular, width ca. 20% of length; opened anteriorly; ca. 8% of shell width and ca. 30% of shell length; edges rather irregular (Figs 93, 95, 96, 98, 99). Profile highly curved ventrally, sagittal profile as arc (imaginary center of ark located below middle point of dorsal surface, ca. 20% away from aperture) (Figs 94, 97); beak located close to posterior margin of aperture. Sculpture of ca. 40 narrow radial cords (Figs 90, 93, 97, 99–101); gradually more distinct towards aperture, wide and narrow cords disposed intercalating, narrow cords ca. 1/2–1/4 of wider cords (Figs 90, 93, 96, 99); concentric cords regularly distributed from apex to aperture ( Figs 100–101 ), ca. 1/2 to 1/3 width of primary radial cords; nodes at intersection of radial and concentric cords low in some specimens (Fig. 99), but frequently forming spine-like projections about as thick as cords (Figs 90, 93, 96); interspaces twice as wide as primary cords, covered by concentric sculpture; interval between concentric sculpture approximately twice as wide as threads; median threads with ca. 40 concentric cords; well preserved specimens with periostracum forming additional transverse, wide pits in concavity formed by radial and concentric cords (Fig. 99). Selenizone well-marked, edges sharp, as tall as adjacent radial cords; lunules regularly distributed (Figs 90, 93, 96, 99. 100). Aperture planar (Fig. 94) to slightly concave (Fig. 97), outline elliptical, width ca. 70% of length; edges undulating due to radial cords; posterior lip flattened, planar, ca. 20% of shell length; mostly convex (Fig. 95), rarely concave (Fig. 98). Inner surface smooth, glossy; apex cavity moderately deep, ca. 20% of shell length (Figs 95, 98, 102). Measurements (in mm). Holotype : 6.8 by 2.9; paratypes MNHN 25311 (Fig. 96): 3.9 by 1.6; MNHN 25315 (sta. 34, Fig. 99): 2.7 by 1.4; MZSP 102932 : #1, 5.0 by 2.7 (Fig. 90), #2, 4.0 by 1.7 ( Figs 100–102 ). Distribution. Continental slope off Espírito Santo, Brazil . Habitat. Sandy-mud bottoms, 54–940 m (dead shells). Material examined. Types . Etymology. The specific epithet is derived from the Portuguese word suspiro , a special dessert, a candy done with egg albumin and sugar; an allusion to general appearance of the shell somewhat resembling this delicate candy. The noun is in apposition.