Guildfordia yoka Jousseaume, 1888

Helwerda, Renate Ariane, Wesselingh, Frank Pieter & Williams, Suzanne T., 2014, On some Vetigastropoda (Mollusca, Gastropoda) from the Plio-Pleistocene of the Philippines with descriptions of three new species, Zootaxa 3755 (2), pp. 101-135 : 131

Guildfordia yoka Jousseaume, 1888

( Figures 69–73 )

2000 Guildfordia yoka Jousseaume, 1888 —Sasaki: p. 101, fig. 51.

2008 Guildfordia yoka delicata Habe & Okutani, 1983 —Kreipl & Alf: p. 250, pl. 70, fig, 5.

Material. Anda 1 (42); Anda 2 (38); Anda 3 (24); Anda 4 (18); Anda 6 (4); AndaDeVos (4); AndaClif1 (1); AndaClif3 (4); Roxas (1).

Characterization. Shell almost planispiral, with reddish surface, H 5.9 mm, W 15.7 mm; P planispiral, 1.1 whorls, two discontinuous spiral ribs and granulate surface in between, DN 0.16–0.23 mm; slightly elevated terminal varix; T 7–9 long spines per whorl, initially triangular, thin hollow, on later whorls elongate and massive; rows of knobs below the suture; umbilicus covered with white, shiny callus.

Distribution. Today the species occurs in Central southern Japan and southward to Indo-West Pacific, at 200– 500 m depth on sand bottom ( Sasaki 2000). It has also been reported from the Philippines, Aliguay Island, from 50–150 m depth ( Kreipl & Alf 2008).

Figures

FIGURES 69 – 73. Turbinidae. 69. Guildfordia yoka Jousseaume, 1888. RGM 608.376. Locality Anda 1. (a) rear view, (b) apertural view, (c) basal view, (d) apical view. 70. Guildfordia yoka Jousseaume, 1888. RGM 608.377. Locality Anda 1. (a) rear view, (b) apertural view, (c) basal view, (d) apical view. 71. Guildfordia yoka Jousseaume, 1888. RGM 608.378. Locality Anda 2. (a) basal view, (b) apical view. 72. Guildfordia yoka Jousseaume, 1888. RGM 608.379. Locality Anda 1. (a) apertural view, (b) basal view, (c) apical view. 73. Guildfordia yoka Jousseaume, 1888. RGM 608.380. Locality Anda 3. (a) SEM detail of protoconch.