Leptochiton linseae Sirenko, 2015, n. sp.
Leptochiton linseae n. sp. (Figs 27–29) Types. Holotype ( ZISP 2224), now disarticulated consisting of SEM stub of valves I, V, VIII, part of perinotum and radula, mount of part of perinotum and radula and vial with other valves, and one paratype (ZISP 2225). Type locality. Beagle Channel, RV Victor...
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| Format: | Other/Unknown Material |
| Language: | unknown |
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2015
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| Online Access: | https://zenodo.org/record/5687239 https://doi.org/10.5281/zenodo.5687239 |
| Summary: | Leptochiton linseae n. sp. (Figs 27–29) Types. Holotype ( ZISP 2224), now disarticulated consisting of SEM stub of valves I, V, VIII, part of perinotum and radula, mount of part of perinotum and radula and vial with other valves, and one paratype (ZISP 2225). Type locality. Beagle Channel, RV Victor Hensen, st 1045, 54° 51.8 ’S, 69 ° 55.6 ’W, 210 m (04.11.1994) Etymology. Named after Dr. Katrin Linse (British Antarctic Survey, Natural Environmental Research Council, Cambridge, UK), who has made a major contribution to the knowledge of Antarctic mollusks. Material examined. Magellan Strait and Beagle Channel, RV Victor Hensen, st. 888, 53° 42.8 ’S, 70 ° 57.4 ’W, 104 m, paratype, BL— 3.7 mm, 26.10.1994; st. 1045, 54° 51.8 ’S, 69 ° 55.6 ’W, 210 m, holotype, BL—4.0 mm, 04.11.1994; RV Hero, st. 402, 53° 41 ’S, 70 ° 24 ’W, 98-110 m, 4 spms, BL— 3.5 -4.0 mm, 13.05. 1979. Distribution. Magellan Strait and Beagle Channel, 104– 210 m. Diagnosis. Animal minute. Valves moderately elevated, rounded, not beaked. Lateral areas not raised. Tail valve with mucro anterior, postmucronal area straight. Central areas with about 28 vague longitudinal rows of weakly raised, rounded granules. Each granule with one megalaesthete and two micraesthetes. Dorsal scales wide, obtusely pointed, with 16–17 distinct ribs. Radula with numerous transverse rows of very small teeth. Central teeth narrow, first lateral teeth narrow and long, major lateral teeth with tridentate cusp. Five gills per side. Description. Holotype 4.0 x 2.0 mm. Shell elongate-oval, moderately elevated (elevation ratio in valve V 0.35). Valves thin, rounded, not beaked. Color of tegmentum white. Head valve semicircular, wider than tail valve. Intermediate valves rectangular, short and wide, anterior and posterior margins nearly straight, not beaked, lateral margins rounded. Tail valve with anterior mucro, antemucronal slope slightly convex, postmucronal slope nearly straight. Tegmentum sculptured with weakly raised rounded granules arranged in about 28 vague longitudinal ... |
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