Brocchinia harasewychi, De, José Carlos N. & De, Silvio Felipe B., 2007

De, José Carlos N. & De, Silvio Felipe B., 2007, Three new species of Cancellariidae (Gastropoda: Neogastropoda) from northeast Brazil with first record of Gergovia for the Atlantic ocean, Zootaxa 1387, pp. 59-68 : 61-65

Brocchinia harasewychi n. sp.

( Figures 6–11 )

Type material: Holotype, MZUSP 77069, [Lt 6.3 mm, Wt 3.4 mm],; Paratype 1, LMUFRPE 0 10, along the state of Alagoas, Brazil, D­32, 09 °20’30’’S, 34°59’11’’W, 452 m, muddy bottom, 18.xii.2001; Paratype 2, MNRJ 10574, along the state of Pernambuco, Brasil, D­11, 08°46,5’00’’S, 34°44,5’00’’W, 690 m, muddy bottom, 18.xi.2000; Paratype 3, MORG 50.659, along the state of Pernambuco, Brasil, D­11, 08°46,5’00’’S, 34°44,5’00’’W, 690 m, muddy bottom, 18.xi.2000.

Type locality: along the state of Pernambuco, Brazil, D­11, 08°46,5’00’’S, 34°44,5’00’’W, 690 m, muddy bottom, 18.xi.2000.

Diagnosis: Large protoconch, with 1¼ whorls; teleoconch with 3½ whorls, first whorl with 3 strong spiral cords, penultimate whorl with 4 cords, one smooth and subsutural and 3 nodulose cords below. Body whorl with 5 cords, 3 strongly nodulose and 2 lower smooth cords. Outer lip with no internal sculpture, columella with 2 folds.

Description: Broad, white, conical shell, very ample body whorl, with 3½ post­nuclear whorls ( Figs. 6– 8 ) (Lt 4.6–6.3 mm). Smooth, large, globular, paucispiral protoconch, 1¼ whorls, with transition to the teleoconch marked by a thin axial edge (fig. 10–11). First teleoconch whorl with 3 equally strong spiral cords, uppermost bordering the suture and 2 more median ones with no evident nodulations. Subsequent whorls with strong blunt axial ribs, over which the cords become more prominent, forming broad interstices ornamented only by axial growth lines. Penultimate whorl with a weak, smooth subsutural spiral cord and 3 nodulose spiral cords passing over broad ribs. Body whorl ornamented by 3 strong spiral cords, uppermost near suture and separated from it by a narrow subsutural area. The 2 median spiral cords have a similar appearance. There are another 3 weaker, smooth spiral cords, the middle of which emerges from the suture. Suture well marked. Conic base ornamented spirally by a smooth spiral cord emerging from the interior of the aperture at the height of the parietal region. Elliptical aperture, narrower on the posterior side (fig. 9). Small prosocline outer lip, with no internal lirae. Inner lip slightly reflected. Very thin parietal callus. Reinforced columella, with 2 oblique folds, the posterior of which is bigger, with the smaller one just anterior to the primary fold. Small, short, rounded siphonal canal.

Etymology: In homage to Dr. M. G. Harasewych, of the Department of Invertebrate Zoology of the National Museum of Natural History — Smithsonian Institution, Washington, DC.

Geographic Distribution: From the state of Pernambuco to the state of Alagoas, Northeast Brazil.

Figures

FIGURES 6 – 11. Brocchinia harasewychi n. sp. (SEM): 6. Holotype, MZUSP 77069 (Lt 6.3 mm), ventral view; 7. Holotype, lateral view; 8. Holotype, dorsal view; 9. Holotype, view aperture (La 2.8 mm; Wa 1.3); 10. Paratype 3, MORG 50.659, detail of protoconch (Lp 0.7 mm; Wa 0.8 mm); 11. Holotype, detail of protoconch (Lp 0.8 mm; Wa 0.8 mm).