Lamellaria Montagu 1816
Creators: name: Fassio, Giulia
name: Stefani, Matteo
name: Russini, Valeria
name: Buge, Barbara
name: Bouchet, Philippe
name: Treneman, Nancy
name: Malaquias, Manuel António E.
name: Schiaparelli, Stefano
name: Modica, Maria Vittoria
name: Oliverio, Marco
Publisher: name: Zenodo
Year: 2022
Subjects: Biodiversity
Taxonomy
Animalia
Mollusca
Gastropoda
Littorinimorpha
Velutinidae
Lamellaria

description: LAMELLARIA MONTAGU, 1816
(FIGS 2, 3, 5F, G, 8C, 9I, J, 10K, L, 11K)
Lamellaria Montagu, 1816: 184;
type species Lamellaria tentaculata Montagu, 1816 by subsequent designation of Wenz, 1940: 955 as Bulla latens O. F. Muller, 1776.
Cryptocella H. Adams & A. Adams, 1853: 202;
type species Lamellaria tentaculata Montagu, 1816 by subsequent designation of Kobelt, 1876 –1881: 78.
Included species: Lamellaria diegoensis Dall, 1885, Lamellaria fella (Er. Marcus & Ev. Marcus, 1970) comb. nov., Lamellaria inflata (C. B. Adams, 1852), Lamellaria latens (O. F. Müller, 1776), Lamellaria mopsicolor Ev. Marcus, 1958.
Description: Body of small to medium size for the subfamily, 0.3–1.1 cm total length. Shell thin, weakly calcified; ear shaped, low spire, with expanded aperture; smooth or weakly sculptured by axial growth lines; completely enclosed by the mantle. Periostracum not visible.
Protoconch of 1.1–2.0 whorls; protoconch I 0.56–1.10 whorls, nucleus diameter 125–214 μm, smooth, with subsutural axial folds; protoconch II with or without axial growth lines; protoconch–teleoconch boundary not always distinct.
Mantle flat or dome shaped, outline rounded; thick or thin, rarely with dorsum tubercles; with anterior siphon folds; texture smooth/wrinkled/jelly-like; colour highly variable, almost transparent to white, grey, beige, yellow, orange, red, violet, brown, often patterned with dots or streaks of colour.
Penis to the right of the right cephalic tentacle; with or without a lateral subterminal papilla. Vas deferens with or without a free loop or several folds in the haemocoel.
Radula reduced taenioglossate, with formula 0:1:1:1:0; rachidian tooth base bifurcated; rachidian cusp with few to several small external denticles on the right side only; lateral teeth elongated, composed of an external, pointed and bold cusp without denticles, plus an internal truncated projection, with several small denticles on the distal side.
Jaws short to elongated.
Distribution: Tropical and temperate Eastern Pacific, Tropical Atlantic, north-eastern Atlantic, Mediterranean Sea, North Sea; 0–61 m deep.
Remarks: The genus Lamellaria can be distinguished from the others thanks to the rachidian tooth with a bifurcated base and denticles only on the left side of the cusp and the lateral tooth composed of one cusp and one projection. Species of this genus can be divided in two main lineages: one present in the temperate north-eastern Atlantic and one in the central–western Atlantic tropics and in the tropical and temperate eastern Pacific. Our analyses indicate that the type species, Lamellaria latens, is part of a monophyletic complex of cryptic species (at least four).
We include in this genus Coriocella fella, owing to its characteristic rachidian tooth, unilaterally denticulated, the general shape of the shell and the absence of the typical mantle dorsal warts of Coriocella.
description: Published as part of Fassio, Giulia, Stefani, Matteo, Russini, Valeria, Buge, Barbara, Bouchet, Philippe, Treneman, Nancy, Malaquias, Manuel António E., Schiaparelli, Stefano, Modica, Maria Vittoria & Oliverio, Marco, 2023, Neither slugs nor snails: a molecular reappraisal of the gastropod family Velutinidae, pp. 924-964 in Zoological Journal of the Linnean Society 197 (4) on pages 955-956, DOI: 10.1093/zoolinnean/zlac091, http://zenodo.org/record/7814306