Anatomy of the pallial cavity and associated organs in three species of Olivella (Mollusca: Neogastropoda: Olividae) from Brazil Author Antunes, Luís Vítor Oliveira Author Figueira, Raquel Author Dilnei de Castro Oliveira, Cléo text Journal of Natural History 2022 2022-11-29 56 1801 1818 http://dx.doi.org/10.1080/00222933.2022.2133645 journal article 198289 10.1080/00222933.2022.2133645 33c672ac-0454-4418-92d5-6513f6858625 1464-5262 7380750 Olivella ( Olivella ) nivea ( Gmelin, 1791 ) ( Figures 1 (e–h), 3) Voluta nivea Gmelin, 1791: 3442 [illustr. Martini 1773 : pl. 50, figs 557, 558]. Porphyria turbinata Röding, 1798: 35 [illustr. Martini 1773 : pl. 50, fig. 558]. Oliva eburnea Lamarck, 1811: 326 [illustr. Martini 1773 : pl. 50, fig. 557]; Duclos 1835 : pl. 1, figs 13–16; Berge 1855: 238 , pl. 41, fig. 4. Oliva oryza Lamarck, 1811: 327 [illustr. Martini 1773 : pl. 50, fig. 558]; Reeve 1850 : pl. 27, fig. 81a, b; Marrat 1871: 32 , pl. 22, fig. 391. Oliva parvula Mörch, 1852: 130 ; Marrat 1871: 30 , pl. 22, figs 373–375. Oliva reeveii Ducros, 1857: 104 , pl. 3, fig. 100a, b. Oliva ( Olivella ) reeveii : Weinkauff 1878: 147 , pl. 38, figs 1, 2. Oliva nivea : Duclos 1844: 7 , pl. 1, figs 13–16; Reeve 1850 : pl. 23, fig. 64a, b. Oliva ( Olivella ) nivea : Weinkauff 1878: 136 , pl. 3, figs 17, 18, pl. 35, figs 9, 10, pl. 37, figs 3, 4. Olivella nivea : Smith 1937: 132 , pl. 50, fig. 8, pl. 51, fig. 11a, b; Abbott 1951: 115 , pl. 7, fig. 4a, b; Warmke and Abbott 1962: 122 , pl. 23, fig. n; Matthews and Rios 1967a: 72 ; Abbott 1974: 234 , fig. 2552, pl. 11, fig. 2552; Bandel 1984: 147 , fig. 289, pl. 18, figs 6, 7; Merlano and Hegedus 1994: 203 , pl. 63, fig. 788; Abbott and Dance 2000: 193 ; Redfern 2001: 109 , pl. 111, fig. 460A; Rios 2009: 273 ; Paulmier 2015: 9 , fig. 11. Olivella ( Olivella ) nivea : Olsson 1956: 172 , pl. 11, figs 3, 3a, 3b; Vokes and Vokes 1983: 27 , pl. 17, fig. 8. Geographic distribution. USA , Florida ( Smith 1937 ; Abbott 1951 ). Mexico , Gulf of Mexico ( Abbott 1951 ); Yucatan Peninsula ( Vokes and Vokes 1983 ). Caribbean Sea ( Gmelin 1791 ). Bermuda ( Abbott 1951 ). West Indies ( Reeve 1850 ; Abbott 1974 ). Bahamas ( Abbott 1951 ), Abaco ( Redfern 2001 ). Puerto Rico ( Warmke and Abbott 1962 ). Guadeloupe and Martinique ( Paulmier 2015 ). Colombia ( Merlano and Hegedus 1994 ). Brazil ( Abbott 1974 ; Abbott and Dance 2000 ); Ceará , Acaraú ( Matthews and Rios 1967a ). –Present study: Brazil , Pernambuco , Fernando de Noronha, Buraco da Raquel; Pernambuco , Ipojuca, Porto de Galinhas; Espírito Santo , Aracruz, Santa Cruz beach; Rio de Janeiro , Campos Basin. Non-verified records: Cuba ( D’Orbigny 1854 ). Puerto Rico , San Juan ( Dall and Simpson 1900 ). Saint Martin Island , Saint Barthélemy Island , Guadeloupe and Martinique ( Paulmier 2007 ). Aruba . Curaçao . Bonaire ( Coomans 1958 ). Venezuela , Cariaco Gulf ( Prieto et al. 2011 ); Isla de Aves ( Coomans 1958 ). Suriname ( Altena 1969 ). Brazil , Pernambuco , Fernando de Noronha Island ( Matthews and Kempf 1970 ); Paraíba , Cabedelo ( Gondim et al. 2011 ); Paraná , Matinhos, Farol Island ( Gernet et al. 2018 ). Examined material BRAZIL – Pernambuco State • 12 specimens , 3 ♂ , 2 ♀ ; Fernando de Noronha , Buraco da Raquel ; 10 August 1999 ; IBUFRJ 11145 • 3 specimens ; Ipojuca , Porto de Galinhas ; 28 July 2011 ; IBUFRJ 21321 . – Espírito Santo State • 37 specimens , 1 ♂ ; Aracruz , Praia de Santa Cruz ; Jul . 1970; IBUFRJ 4579. – Rio de Janeiro State • 52 specimens , 1 ♀ ; Campos Basin ; IBUFRJ 21426 . Description Shell ( Figure 1 (e–h)). Length, 15 mm , elliptical; spire conical, highly pointed; last whorl broad, about 85% of shell length. Protoconch small, smooth, with single whorl. Suture narrow, channelled. Parietal callus yellowish white, well developed, spreading through fasciolar region, with lateral fissure. Aperture narrow, about 60% of shell length; outer lip thin, internal surface smooth; siphonal channel deep; pillar structure white, broader anteriorly, reaching fasciolar region, four to seven oblique plicae; fasciolar band yellowish white, bordered by narrow groove. Columella reabsorbed. Operculum absent. Shell colour: yellowish, with subsutural triangular brown stains, irregular stains from second third of last whorl to fasciolar band, non-pigmented area below subsutural pigmented zone. Anatomy ( Figure 3 ). Auricle large, oval, slightly smaller than ventricle. Ventricle rounded, constricted near auricle, lateral groove deep. Aorta laterally connected to ventricle. Osphradium about 15% of pallial cavity area, curved near siphon, central groove larger near siphonal aperture, lamellae spaced, bilobate, shorter and not entirely involving central axis near siphonal aperture. Gill broad, about 31% of pallial cavity area, anterior end curved towards osphradium, lamellae compacted, triangular, apexes very arched towards rectum. Hypobranchial gland narrow, occupying half space between gill and rectum. Anal gland about 13% of pallial cavity area, triangular, granulated, four square masses in its interior, near mantle margin. Posterior mantle lobe large, laminar, folded. Posterior mantle tentacle tapered, as long as shell, inserted posteriorly to mantle lobe. Siphon long, tapered, margins smooth. Anterior mantle tentacle laminar, tapered, shorter than siphon, base wide, surrounding siphon. Male specimens: prostate large, formed by tangled tube wrapped by thin tissue, about 10% of pallial cavity area, rectum under prostate, far from pallial cavity margin. Female specimens: glandular complex about 7% of pallial cavity area, with digitiform extension towards nephridium, slightly granulated, rectum under glandular complex, next to hypobranchial gland.