Gonimyrtea Marwick, 1929

Glover, Emily A. & Taylor, John D., 2007, Diversity of chemosymbiotic bivalves on coral reefs: Lucinidae (Mollusca, Bivalvia) of New Caledonia and Lifou, Zoosystema 29 (1), pp. 109-181 : 128

Genus Gonimyrtea Marwick, 1929

Gonimyrtea Marwick, 1929: 912 .

TYPE SPECIES. — Loripes concinna Hutton, 1885 (original designation). New Zealand ( Figs 12A, B ; 13A ) .

DIAGNOSIS. — Shell small, subcircular to ovate, higher than long, inflated. Sculpture of closely spaced, thin, low commarginal lamellae. Right valve with single cardinal tooth and small anterior and posterior lateral teeth, left valve with two cardinals, the anterior much larger and small anterior and posterior lateral teeth. Lunule narrow, lanceolate. Ligament short, curved, shallowly inset. Anterior adductor scar medium long, ventrally detached from pallial line for 1/3 of length. Pallial line thick, sometimes divided into rounded blocks.

REMARKS Concepts of this genus have been confused because Chavan’s (1969: fig. E7.3) illustration for Gonimyrtea was of an Eocene species with little resemblance to the type species. Chavan (1969) also regarded Alucinoma Habe, 1958 (type species A. soyae Habe, 1958 ), as a synonym of Gonimyrtea , but the shells are quite distinct. For example, A. soyae lacks cardinal teeth and has widely-spaced, commarginal lamellae.Because of this confusion we illustrate Gonimyrtea concinna here ( Figs 12A, B ; 13A ).

Figures

FIG. 12. — A, B, Gonimyrtea concinna (Hutton, 1885), Omaha Bay, Northland, New Zealand (NMNZ), exterior and interior of left valve; C-F, G. fidelis n. sp.; C, D, holotype (MNHN), exterior and interior of left valve, Loyalty Ridge, MUSORSTOM 6, stn DW 441, 80 m, New Caledonia; E, F, detail of hinge of right and left valves (E,paratype; F, holotype);G-L, Gonimyrtea avia n. sp., Lansdowne-Fairway Banks, New Caledonia, CORAIL 2, stn DW 18, 69 m, holotype (MNHN); G-J, exterior and interior of left and right valves; K, L, details of hinge of right and left valves. Scale bars: A-D, G-J, 5 mm; E, F, K, L, 1 mm.

FIG. 13 — Outline drawings of interiors of right valves of Gonimyrtea species: A, G. concinna (Hutton, 1885); B, G. fidelis n. sp.; C, G. avia n. sp. Not to scale.