Description
Author: Jan Delsing
Text ID: 108451
Text Type: 1
Page: 0
Created: 2021-05-01 12:07:41 - User Delsing Jan
Language: EN
Text function: [[t:1640759,textblock=108451,elang=EN;Description]]
Shell small, smooth, fragile, colourless and vitrinellid-like, with thin periostracum. The larval shell consists of 0.75 whorl of rapidly increasing diameter, smooth and with flange-like aperture, total diameter 340 µm. The teleoconch has 1.5 whorls of rapidly increasing diameter, sculptured only with indistinct growth lines. The cross-section of the whorls is almost circular, slightly flattened at the umbilicus, there with more prominent growth-lines. The umbilicus is wide, exposing more than half the preceding whorl. Dimensions. Diameter 2.25 mm. Operculum : Multispiral, thin, transparent. Radula: Almost twice as long as broad; as described by Marshall (1988). Soft parts :The snout is long, tapering, and quite slender. The cephalic tentacles are about as long as the snout, flattened, and lack sensory papillae. Close to the left cephalic tentacle is a broad and flat additional tentacle, possibly two tightly appressed tentacles, which lie diagonally across the base of the snout, similar to the case in Leptogyra. There are no epipodial tentacles.
Only two poorly preserved specimens were available of this strange species. It was not possible to find out if there was a single broad or a double, additional and more central tentacle beside the left cephalic tentacle, or if perhaps this one actually is the cephalic tentacle. A likely explanation, however, is that the leftmost of the tentacles is a cephalic one and the more central one (pair?) is a copulatory organ.
Warén A. & Bouchet P. (1993) New records, species, genera, and a new family of gastropods from hydrothermal vents and hydrocarbon seeps.
Distribution
Author: Jan Delsing
Text ID: 108452
Text Type: 3
Page: 0
Created: 2021-05-01 12:09:34 - User Delsing Jan
Language: EN
Text function: [[t:1640759,textblock=108452,elang=EN;Distribution]]
Hydrothermal Vents. Fiji. Lau Basin. Hina Hina.
Warén A. & Bouchet P. (1993) New records, species, genera, and a new family of gastropods from hydrothermal vents and hydrocarbon seeps.