Cardiolucina undula, Glover & Taylor, 2007

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 : 156-158

publication ID	https://doi.org/ 10.5281/zenodo.5392295
persistent identifier	https://treatment.plazi.org/id/039087F4-FFEE-6A13-1001-FBE3FDD5D428
treatment provided by	Marcus
scientific name	Cardiolucina undula
status	sp. nov.

Treatment

Cardiolucina undula View in CoL n. sp.

( Figs 23D View FIG ; 31 View FIG )

TYPE MATERIAL. — Holotype: 1 sh, L 4.0 mm, H 3.6 mm, T (2v) 3.2 mm ( MNHN).

Paratypes: from type locality, 5 sh, 12 v ( MNHN) ; 2 sh, 1 v ( BMNH 20050576 ). — Figured paratypes: from type locality, 2 v, L 4.1 mm, H 4.0 mm, T 1.7 mm ; L 3.1 mm, H 3.0 mm, T 1.2 mm ( MNHN).

TYPE LOCALITY. — New Caledonia, MUSORSTOM 4, stn DW 149, 19°08’S, 163°23’E, 155 m.

ETYMOLOGY. — Undula refers to the undulating surface of the shell.

MATERIAL EXAMINED. — Touho. 1 stn, 80-140 m, 1 v. Other New Caledonia. Baie de St Vincent, LAGON, stn 190, 22°02’S, 165°57’E, 135-150 m, 2 v. — Stn 410, Grand Récif Sud, 22°42’S, 167°22’E, 35 m, 1 v. MUSORSTOM 4, stn DW 149, Grand Passage, 19°08’S, 163°23’E, 155 m, 7 sh, 14 v. — Stn DW150, 19°07’S, 163° 22’E, 110 m, 11 sh, 20 v. — Stn DW 151, 19°07’S, 163°22’E, 200 m, 8 v.

DESCRIPTION

Shells small,L to 5.0 mm, H to 4.5mm, white or pink, solid, subcircular, anteriorly extended (H/L 0.97), inflated (T/L 0.4). Posterior sulcus prominent.Lunule small, heart-shaped.Sculpture of prominent, fl aring, regularly spaced, undulate commarginal lamellae. Interspaces with low radial ribs. Shell surface with linear punctations ( Fig. 31F View FIG ). Radial sculpture absent in anterior and posterior dorsal areas. Commarginal lamellae more closely spaced on juvenile shells. Hinge teeth: LV with 2 small cardinal teeth and large anterior and posterior laterals, RV with 2 cardinal teeth, the anterior much smaller, and anterior and posterior lateral sockets. Anterior adductor muscle scar short, detached for 1/5 of length. Pallial line continuous. Interior shell margin crenulate, finer crenulae anteriorly and posteriorly.

REMARKS

Previously, Taylor & Glover (1997: 102) included samples of this species from New Caledonia within Cardiolucina civica (Yokoyama,1927) , but that species is larger, has a more circular shell and more prominent radial ribs.Another similar species is C. rugosa ( Hedley, 1909) of the W Pacific but this is smaller (c. 3.0 mm shell length), with relatively larger hinge teeth, the commarginal lamellae less conspicuously folded and the inner shell margin with far fewer crenulations.