Epitonium nanum (Jeffreys, 1884)

Ortega, José Rafael & Gofas, Serge, 2019, The unknown bathyal of the Canaries: new species and new records of deep-sea Mollusca, Zoosystema 41 (26), pp. 513-551 : 528

Epitonium nanum (Jeffreys, 1884)

( Fig. 12H )

MATERIAL EXAMINED. — 1 sh., DW130.

REMARKS

The lectotype, collected in 985 m in the northern part of Bay of Biscay, was figured by Bouchet & Warén (1986: 520). This species was so far only known from the type locality and from the Azores.It is easily distinguished from E. pseudonanum Bouchet & Warén, 1986 , which also occurs around the Canaries but in shallower water, by its definite umbilicus, the finer and more flexuous ribs and the absence of spiral grooves between these. New to Spanish waters.

Figures

FIG. 12. — A-E, Epitonium polacia (Dall, 1889): A, shell from DW130 (4.9 mm height); new to the eastern Atlantic; B, protoconch of the same shell; C, scanning electron micrograph of the same protoconch; D, E, shell from DW130 (4.3 mm height); F, G, Opaliopsis opalina (Dall, 1927): F, shell from DW130 (5.9 mm height); new to the eastern Atlantic; G, protoconch of the same shell; H-K, Epitonium nanum (Jeffreys, 1884), shell from DW130 (2.9 mm height); new to Spanish waters; I, Narrimania concinna (Sykes, 1925), shell from DW130 (4.6 mm height); new to Spanish waters; J, protoconch of the same specimen; K, scanning electron micrograph of the protoconch of a juvenile, live taken specimen, same locality; the arrow points to the protoconch-teleoconch limit. Scale bars: 100 µm.