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 Solariella carvalhoi Lopes & Cardoso, 1958 ( Fig. 9 A–C) Solariella carvalhoi Lopes & Cardoso, 1958 : 59 , figs 1–3; Rios, 1970 : 23 ; Abbott, 1974 : 41 ; Rios, 1975 : 21 , pl. 4, fig. 45; Rios, 1985 : 23 , pl.10, fig. 95; Calvo, 1987 : 59 , fig. 24; Rios, 1994 : 35 , pl. 10, fig. 105; Miyaji, 2004 : 78 ; Barros, Santos & Francisco, 2008 : 11 , figs 8–14; Rios, 2009 : 55 , text fig.; Barros, 2010 : 58 , figs 8–14; Daccaret & Bossio, 2011 : 54 , fig. 92; Dornellas & Simone, 2011 : 10 , figs 41–43; Cavallari et al. , 2016 : 1 , figs 1–23. Solariella sp. 2: Leal, 1991 : 47 , pl. 3, figs E–G. Solariella quadricincta Quinn, 1992 : 50 , figs 1–4; Barros, Santos & Francisco, 2008 : 9 , figs 1–7; Barros, 2010 : 56 , figs 1–7; Miloslavich et al. , 2010 : table S6. Solariella staminea Quinn, 1992 : 53 , figs 11–12; Benkendorfer & Soares-Gomes, 2009 : 147 . Type material. Holotype : MZSP 18446 . Paratype : Paulo de Sá Cardoso Collection , same data as Holotype (probably lost; J. Heise , pers. comm.) . Type locality. Brazil , off São Paulo state, 31°35’08”S , 50°50’00”W , 54 m ( Moreira leg., 11/xi/1956 ) . Distribution. From Venezuela to southern Brazil , live specimens from 0–350 m ( Cavallari et al. 2016 ). Habitat. Coralline and muddy bottoms. Material examined. Brazil : Espírito Santo : Davis Seamount , 20°40’S , 34°40’W , 60 m , MNHN-IM-2012- 37682, 3 paratypes of S. staminea , MORG 26530 , holotype of S. staminea MD55 sta. DC40 ( 17/v/1987 ). Rio de Janeiro : off Cabo Frio , 22°58’S , 42°06’W , MD55 sta. CB101 , 50 m, MNHN , 4 sh ( 01/vi/1987 ). Additional non- MD55 material : Brazil : São Paulo : holotype . Measurements. 5–6 whorls, H=5.0–7.0 mm, D=5.5–8.0 mm (n=4). Remarks. The present material compares well with S. carvalhoi . This species can be readily told apart from the local congener Solariella quinni Barros & Pereira in Barros et al. , 2008 ( Fig. 9 D–G - see below) mainly by its larger and proportionally wider shell, its much wider umbilicus ( Fig. 9 C ), which was correctly emphasized by Lopes & Cardoso (1958) , its more delicate axial and much stronger spiral sculpture ( Fig. 9 A–B). The two remaining local congeners, S. quadricincta Quinn, 1992 and S. staminea Quinn, 1992 , were considered junior synonyms of S. carvalhoi by Cavallari et al. (2016) . Their study was based on a large sample, which revealed that both morphotypes ( S. quadricincta and S. staminea ) fall within a continuum of conchological variation. Solariella quinni Barros & Pereira in Barros et al. , 2008 ( Fig. 9 D–G) Solariella quinni Barros & Pereira in Barros et al. , 2008 : 13 , figs 15–21; Barros, 2010 : 60 , figs 15–21; Cavallari et al. , 2016 : 44 . Type material. Holotype : MZSP 77083 . Paratypes : MZSP 77082 , 08°11’S , 34°34’W , 66–71 m ( 18/xii/2004 ) ; MZSP 77084 , 08°11’S , 34°36’W , 69–71 m ( 19/xii/2004 ) ; MZSP 77085 , 08°11’S , 34°36’W , 69–71 m ( 19/xii/2004 ) . Type locality. Brazil , off Pernambuco , 08°09’S , 34°34’W , gravel bottom, 51–71 m ( 19/xii/2004 ) . FIGURE 9. Solariellidae collected by the MD55 expedition. A–C. Solariella carvalhoi MNHN, sta. CB101 (H=6.9 mm, D=7.8 mm). A. apertural view. B. apical view. C. umbilical view. D–G. Solariella quinni MNHN, sta. DC73 (H=4.2 mm, D=4.2 mm). D. apertual view. E. apical view. F. umbilical view. G. SEM, protoconch detail. H–L. Suavotrochus lubricus . H–J. MNHN, sta. DC75, apertural view (H=4.8 mm, D=3.5 mm). I. apical view. J. umbilical view. K. MNHN, sta. DC75, detail of protoconch under SEM. L. MNHN, sta. CB93, juvenile specimen with ribbed sculpture (H=2.2 mm, D=2.1 mm). Previously known distribution. Northeast Brazil , off Pernambuco state, live specimens from 51–71 m ( Barros et al. 2008 ). New occurrence. Espírito Santo state, off Southeast Brazil , Abrolhos Slope , 290–620 m (shells only) . Habitat. Gravel and muddy bottoms ( Barros et al. 2008 ; present study). Material examined. 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 ); 18°59’S , 37°49’W , MD55 sta. CB80 , 290– 315 m , MNHN , 1 sh ( 28/ v/1987 ). Additional non-MD55 material : Brazil : Pernambuco : types . Measurements. 5 whorls, H= 4.2 mm , D= 4.2 mm (largest specimen). Remarks. The present specimens compare well with the type material. The species can be readily diagnosed by the sculpture pattern on the whorl shoulder ( Fig. 9 E ) and base, as well as by the narrow, internally smooth umbilicus ( Fig. 9 F ). This species is similar to S. lacunella ( Dall, 1881 ) from the Caribbean, but can be distinguished from it by: (1) being much smaller (H=~ 4.2 mm , as opposed to 8.5 mm in S. lacunella ); (2) presenting an overall stronger axial sculpture with conspicuous axial ribs on the whorl shoulder, and weaker spiral sculpture with narrower cords, especially on the base; (3) having a more convex base; and (4) presenting a much narrower umbilicus. The records presented here greatly expand the species range ~ 1,200 km southward to Espírito Santo state. The maximum depth for the species is also updated herein from 71 to 620 m . Solariella quinni was originally described by Barros et al. (2008) . The subsequent paper by the senior author ( Barros 2010 ) is an almost entirely verbatim repetition of the previous version and is herein considered a re-publication, even though it does not contain a reference to the former.