Magnella malmii Dall 1889

• Main Authors: Figueira, Raquel Medeiros Andrade, Absalão, Ricardo Silva
• Format: Other/Unknown Material
• Language: unknown
• Published: Zenodo 2012
• Subjects: Biodiversity; Taxonomy; Animalia; Mollusca; Gastropoda; Neogastropoda; Raphitomidae; Magnella; Magnella malmii; Northeast Atlantic; Northwest Atlantic
• Online Access: https://doi.org/10.5281/zenodo.5632965; http://treatment.plazi.org/id/8E7187D88E33674B47C0E2B9FDF46ADC

Magnella malmii (Dall, 1889) (Figs. 20–21) Pleurotomella ( Gymnobela ?) malmii Dall, 1889: 127: Dall (1881: 70); Taranis moerchii auct . non Malm, 1861: Dall (1881: 70); Taranis malmii (Dall, 1889): Bouchet & Warén (1980: 78, figs. 167, 272–273); Gymnobela malmii (Dall, 1889): Absalão et al . (2005: 33, fig. 91); Rios (2009: 350, species 909); Pleurotoma pycnoides Dautzenberg & Fischer, 1896: 418, pl.16, figs. 3, 4: Dautzenberg (1927: 66, pl. 2, figs. 23, 24). Type material : Not located. Type locality : Off Havana, Cuba, 1472 m. Material examined : 18407 [1] OP II # 80; 15980 [3] OP II # 54; 15357 [1] OP I # 74; 17173 [2] OP I # 44. Description: Shell plump, biconical, white, up to 3.00 mm long. Protoconch with about three whorls. Protoconch 1 with spiral rows of tiny crosses. Protoconch 2 with diagonal cancellation on the lower half of the whorls and axial riblets crossed by very fine and faint spiral threads on the upper half. Clear-cut proto-teleoconch boundary. Teleoconch whorls with one strong subsutural cord and two more spiral cords on the lower half of the whorls, crossed by 13–15 strong axial ribs (on the second whorl). Nodules on the intersections of the ribs with the two lower spiral cords, but the subsutural cord shows large nodules which are not strictly related to the axial sculpture. Slightly depressed area separates the subsutural cord from the lower half of the whorls, and the axial ribs are fainter in this part. Shell surface covered by spirally aligned granules. Suture well marked. Base short, axial ribs vanishing toward the aperture and about 10 spiral cords. Anal sinus not discernible. Inner lip reflected over parietal wall. Outer lip thick. Anterior siphonal canal oblique, short and wide. Aperture elliptical. Geographic distribution : Northeast Atlantic: Azores (Dautzenberg & Fischer, 1896; Dautzenberg, 1927; Bouchet & Warén, 1980). Northwest Atlantic: Cuba (Dall, 1889); Florida (Bouchet & Warén, 1980). Southwest Atlantic: Espírito Santo and Rio de Janeiro (Absalão et ...