Myrtina porcata, 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 : 120

publication ID	https://doi.org/ 10.5281/zenodo.5392295
persistent identifier	https://treatment.plazi.org/id/039087F4-FFCA-6A2E-102B-FE05FEB3D5E5
treatment provided by	Marcus
scientific name	Myrtina porcata
status	sp. nov.

Treatment

Myrtina porcata View in CoL n. sp.

( Figs 6B View FIG ; 7 View FIG )

TYPE MATERIAL. — Holotype: 1 sh, L 10.8 mm, H 10.3 mm, T 2.9 mm ( MNHN).

Paratypes: New Caledonia, secteur de Touho, Passe de Touho , stn 1249, 20°49’S, 165°19’E, 80-140 m, 1 sh, 115 v ( MNHN). — Figured paratypes: same locality, 1 LV, L 6.3 mm, H 6.2 mm ( MNHN) GoogleMaps ; 1 LV, L 6.9 mm, H 6.7 mm ( MNHN); 1 LV, L 3.7 mm, H 3.1 mm ( MNHN); 1 RV, L 4.0 mm, H 3.5 mm ( MNHN); 1 LV, L 6.6 mm, H 6.1 mm ( BMNH 20050569 ) ; 1 RV, L 7.6 mm, H 7.3 mm ( BMNH 20050569 ) ; 1 sh, L 7.1 mm ( BMNH 20050569 ) .

TYPE LOCALITY. — New Caledonia, secteur de Poindimie, stn 835, 20°47’S, 165°17’E, 135- 150 m.

ETYMOLOGY. — Latin porcata , a ridge between furrows, a reference to the evenly spaced, commarginal lamellae.

MATERIAL EXAMINED. — Koumac. 4 stn, 30-120 m, 57 v, 3 live.

Other New Caledonia. LAGON, stn 326, Grand Récif Sud, 22°26’S, 167°02’E, 67 m, 1 v. — Stn 580, 22°44’S, 167°19’E, 95-100 m, 1 v. — Stn 604, secteur de Yaté, 22°14’S, 167°04’E, 80 m, 1 v. — Stn 605, 22°15’S, 167°02’E, 65-70 m, 1 v.

BATHUS 1, côte est, stn DW 692, 20°35’S, 164°59’E, 140 m, 2 v. — Stn DW 674, 20°49’S, 165°19’E, 105 m, 1 v. — Stn DW 640, 21°52’S, 166°48’E, 174 m, 2 v. — Stn DW 666, 20°57’S, 165°34’E, 105 m, 1 v. — Stn DW 700, 20°57’S, 165°35’E, 122-160 m, 10 sh. — Stn DW 1234, Cap N’Doua, 22°24’S, 166°55’E, 47-52 m, 1 v. MUSORSTOM 4, stn DW 149, 19°08’S, 163°23’E, 155 m, 3 v. — Stn DW 203, 22°36’S, 167°05’E, 105- 110 m, 1 v.

DESCRIPTION

Shell white, small to medium H to 10.3 mm, L to 10.8 mm, outline subcircular (H/L 0.91-0.95), valves relatively flat (T/L 0.23-0.26); posterior margin straight. Protoconch 215 µm, PI large, smooth, PII a narrow rim. Sculpture of regular, closely spaced, flat-topped commarginal lamellae; interspaces narrow without radial striations. Commarginal lamellae elevated into folia along posterior and antero-dorsal margins. Posterior and anterior sulci marked by lower elevation of lamellae. Lunule short, lanceolate, asymmetrical, most in RV. Ligament external, short. Hinge plate narrow, RV with one cardinal and tiny anterior and posterior lateral teeth; LV with two cardinals and lateral teeth vestigial or absent. Anterior adductor muscle scar short, detached from pallial line for 1/5 of length. Posterior scar ovate. Pallial line entire, broad. Shell margin smooth.