Pleurotomella anceyi Dautzenberg & Fischer 1897

• 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; Pleurotomella; Pleurotomella anceyi; Northeast Atlantic
• Online Access: https://doi.org/10.5281/zenodo.5632991; http://treatment.plazi.org/id/8E7187D88E29675147C0E297FCCC6F20

Pleurotomella cf. anceyi Dautzenberg & Fischer, 1897a (Figs. 47–48) Pleurotoma anceyi Dautzenberg & Fischer, 1897a: 38: Dautzenberg & Fischer (1897b: 151, pl. 3, fig. 3); Dautzenberg (1927: 33, 49, pl. 2, fig. 19). Pleurotomella anceyi (Dautzenberg & Fischer, 1897): Bouchet & Warén (1980: 35, fig. 90). Type material : In Museé Océanographique de Monaco. Type locality : Azores, Princesse Alice (1896), sta. 74 (39º 21’ 20”N, 33º 26’W), 1360 m. Material examined : 18984 [1] OP I # 86; 18985 [2] OP II # 77. Description : Shell wide and conical, white, up to 6.90 mm long. Protoconch with about four whorls. Protoconch 1 with rows of tiny crosses. Protoconch 2 with diagonal cancellation on the lower 2/3 of the whorls, and axial riblets crossed by very fine spiral threads on the upper third. Clear-cut proto-teleoconch boundary. Teleoconch whorls with a slightly concave area below the suture, ornamented with faint fine axial riblets and 1–2 fine spiral threads. Below this area, two undulating acute spiral cords, forming oblong, horizontally oriented nodules on the apices. Additional secondary spiral cordlets, one above the cords and others between and below them. Fine suprasutural cord present. Shell surface granulose. Suture indistinct. Base sculptured by numerous spiral lines. Inner lip reflected over parietal wall. Outer lip thin. Anterior siphonal canal short and narrow. Aperture elliptical. Geographic distribution : Northeast Atlantic: Azores (Dautzenberg & Fischer, 1897a; Dautzenberg & Fischer, 1897b; Dautzenberg, 1927; Bouchet & Warén, 1980). Southwest Atlantic: Campos Basin, Rio de Janeiro (this paper). Bathymetry : 1300 m (Dautzenberg, 1927)– 1670 m (this paper). Discussion : This species does not have the shouldered whorls that are typical of this genus. It is also characterized by a fairly rectilinear profile, wide subsutural area and two undulating nodulose spiral cords. Our material differs from the typical P . anceyi in having two spiral cords, while P . anceyi has three to ...