Microcardium trapezoidale, Poutiers, 2006
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publication ID |
https://doi.org/ 10.5281/zenodo.5390212 |
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persistent identifier |
https://treatment.plazi.org/id/03BA8443-6552-5C04-FF28-CD18FCD9FC4D |
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treatment provided by |
Marcus |
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scientific name |
Microcardium trapezoidale |
| status |
sp. nov. |
Microcardium trapezoidale View in CoL n. sp. ( Figs 6-9 View FIG View FIG View FIG )
Microcardium sp. B View in CoL – Poutiers 1992: 141, fig. 2L.
TYPE MATERIAL. — Holotype: MUSORSTOM 6, stn CP 464, E of Lifou , 21°02.30’S, 167°31.60’E, 430 m, 1 sh (MNHN). Paratypes: same locality, 5 sh (3 MNHN, 1 NSMT, 1xUSNM) GoogleMaps ; 1 lv, 1 rv (MNHN). — Stn DW 458, E of Lifou, 21°00.93’S, 167°29.96’E, 400 m, 1 spm (MNHN). — Stn DW 459, E of Lifou, 21°01.39’S, 167°31.47’E, 425 m, 1 sh (MNHN). — Stn CP 465, E of Lifou , 21°03.55’S, 167°32.25’E, 480 m, 1 spm (MNHN), 3 sh (1 AMS, 1 BMHN, 1 NMNZ) GoogleMaps .
TYPE LOCALITY. — Loyalty Ridge, E of Lifou, NE Cap des Pins, 21°02.30’S, 167°31.60’E, 430 m, MUSORSTOM 6, stn CP 464.
ETYMOLOGY. — The name alludes to the general outline of the shell.
OTHER MATERIAL EXAMINED. — New Caledonia. VAU- BAN 1978-1979, stn 2, S Lagoon, off Presqu’île de Kuebeni, external slope, 22°17’S, 167°14’E, 425-430 m,
2 rv. — Stn 3, S Lagoon, off Presqu’île de Kuebeni, external slope, 22°17’S, 167°12’E, 390 m, 1 lv, 3 rv. — Stn DR 40, S Lagoon, off Passe de Boulari, external slope, 22°30’S, 164°24’E, 250-350 m, 1 lv.
MUSORSTOM 4, stn CP 171, N Lagoon, northern slope, 18°57.8’S, 163°14.0’E, 425 m, 1 spm (alcohol preserved). — Stn DC 235, S Lagoon, NNE Cap Coronation, 22°13.0’S, 167°12.0’E, 405-415 m, 1 lv. — Stn CP 239, S Lagoon, NNE Cap Coronation, 22°14.8’S, 167°15.7’E, 2 sh, 2 lv, 3 rv. — Stn CC 248, S Lagoon, NNE Cap Coronation, 22°09.5’S, 167°10.0’E, 380- 385 m, 1 spm, 2 sh.
BIOCAL, stn DW 77, S Lagoon, off Presqu’île de Kuebeni, external slope, 22°15’S, 167°15’E, 440 m, 2 spm (alcohol preserved), 5 lv, 1 rv.
MUSORSTOM 5, stn DW 316, Banc Nova, S of Chesterfield Ridge, 22°25’S, 159°24’E, 330 m, 1 rv. — Stn DW 328, Chesterfield, 20°23’S, 158°44’E, 340-355 m, 1 lv. — Stn DW 350, Chesterfield, 19°34’S, 158°35’E, 280 m, 2 lv, 1 rv. — Stn DW 380, S of Chesterfield, 19°37.70’S, 158°33.90’E, 555-570 m, 19 lv, 8 rv. — Stn DW 381, S of Chesterfield, 19°38’S, 158°47’E, 620 m, 4 rv, 1 lv. — Stn DW 382, S of Chesterfield, 19°37’S, 158°43’E, 580 m, 1 lv. — Stn DW 388, Coral Sea, 20°45’S, 160°54’E, 500-510 m, 1 lv. — Stn DW 389, Coral Sea, 20°45’S, 160°54’E, 500 m, 1 lv.
SMIB 2, stn DW 21, S Île des Pins, 22°40.3’S, 167°41.3’E, 460-500 m, 1 spm.
BIOGEOCAL, stn DW 308, NW of Lifou, 20°40.00’S, 166°58.00’E, 510-590 m, 1 spm, 1 lv.
CORAIL 2, stn DE 16, S slope of Banc Lansdowne, Lord Howe-Fairway Ridge, 20°47.75’S, 160°55.87’E, 500 m, 2 rv.
MUSORSTOM 6, stn DW 391, Lifou, N Baie du Santal, 20°47.35’S, 167°05.70’E, 390 m, 1 sh, 3 lv. — Stn DW 393, E Baie du Santal, 20°48.29’S, 167°09.54’E, 420 m, 1 lv, 4 rv. — Stn DW 397, E Baie du Santal, 20°47.35’S, 167°05.17’E, 380 m, 1 rv. — Stn DW 398, same region, 20°47.19’S, 167°05.65’E, 370 m, 1 sh. — Stn DW 406, NW of Lifou, 20°40.65’S, 167°06.80’E, 373 m, 1 lv, 4 rv. — Stn DW 407, NW of Lifou, 20°40.70’S, 167°06.60’E, 360 m, 1 spm. — Stn DW 410, NW of Lifou, 20°38.05’S, 167°06.65’E, 490 m, 1 lv, 4 rv. — Stn DW 411, NW of Lifou, 20°40.65’S, 167°03.35’E, 424 m, 1 sh, 2 rv. — Stn DW 413, NW of Lifou, 20°40.10’S, 167°03.50’E, 463 m, 1 spm (broken), 2 rv. — Stn CP 428, NW of Ouvéa Atoll, 20°23.54’S, 166°12.57’E, 420 m, 1 sh. — Stn DW 446, Lifou, 20°54.33’S, 167°18.59’E, 360 m, 1 spm. — Stn DW 458, E of Lifou, 21°00.93’S, 167°29.96’E, 400 m, 2 lv, 1 rv. — Stn DW 459, E of Lifou, 21°01.39’S, 167°31.47’E, 425 m, 4 lv, 3 rv. — Stn CP 464, E of Lifou, 21°02.30’S, 167°31.60’E, 430 m, 2 spm (1 incomplete), 4 lv, 6 rv. — Stn CP 465, E of Lifou, 21°03.55’S, 167°32.25’E, 480 m, 4 lv, 2 rv. — Stn DW 481, NE slope of Maré, 21°21.85’S, 167°50.30’E, 300 m, 2 lv, 1 rv.
New Protocardiinae (Mollusca, Bivalvia) from Southwest Pacific
BERYX 11, stn CP 21, Norfolk Ridge, 24°44’S, 168°07’E, 430-450 m, 1 sh, 1 rv.
BATHUS 1, stn DW 642, off Passe de Kouakoué,
external slope, 21°52’S, 166°50’E, 302-305 m, 1 lv, 1 rv. — Stn DW 643, off Passe de Kouakoué, external slope, 21°50’S, 166°48’E, 383 m, 2 lv. — Stn DW 670,
Poutiers J.-M.
FIG. 7. — Microcardium trapezoidale n. sp., length 10.3 mm, S New Caledonia, BIOCAL, stn DW 77: A, hinge of left valve; B, hinge of right valve; C, dorsal view of left valve; D, dorsal view of right valve; E, anterodorsal area of left valve (SEM); F, anterodorsal area of right valve (SEM). Scale bars: A, B, 2 mm; E, F, 0.6 mm.
off Passe de Cap Baye, 20°54’S, 165°53’E, 394-397 m, 1 rv. — Stn CP 707, off Passe de Ngoé, 21°43’S, 166°36’E, 347-375 m, 1 sh.
BATHUS 2, stn DW 717, SW Île des Pins, external slope, 22°44’S, 167°17’E, 350-393 m, 3 lv, 2 rv. — Stn DW 724, SW Île des Pins, external slope, 22°48’S, 167°26’E, 344-358 m, 1 spm. — Stn DW 730, off Passe de Kouaré, 23°03’S, 166°58’E, 397-400 m, 1 spm, 1 rv. — Stn DW 731, off Passe de Kouaré, 22°49’S, 166°45’E, 300-370 m, 1 lv, 2 rv. — Stn CP 736, off Passe de Kouaré, 23°03’S, 166°59’E, 452-464 m, 1 sh, 2 lv, 5 rv.
BATHUS 3, stn CP 833, N Norfolk Ridge, 23°03’S, 166°58’E, 441-444 m, 1 sh, 1 lv, 1 rv.
HALIPRO 1, stn CP 951, off Passe Nord de Ngoé, 21°43’S, 166°37’E, 314-364 m, 1 rv (incomplete). — Stn CP 877, N Norfolk Ridge, 23°03’S, 166°59’E, 464- 480 m, 2 lv.
BATHUS 4, stn DW 887, off Passe de Duroc, external slope, 21°07’S, 164°28’E, 320-344 m, 1 sh. — Stn DW 889, off Passe de Duroc, external slope, 21°01’S, 164°27’E, 416-433 m, 2 lv. — Stn DW 902, Grand Passage, 19°01’S, 163°15’E, 341-351 m, 1 lv. — Stn DW 903, Grand Passage, 19°00’S, 163°14’E, 386-400 m, 1 spm, 2 lv, 2 rv. — Stn DW 907, Grand Passage, 19°01’S, 163°13’E, 370-394 m, 2 lv, 2 rv.
Vanuatu. MUSORSTOM 8, stn DW 960, S Anatom Island, 20°20’S, 169°50’E, 390-422 m, 1 spm, 2 lv, 2 rv. — Stn CP 963, S Anatom Island, 20°20’S, 169°49’E, 400-440 m, 1 spm, 2 lv, 3 rv. — Stn DW 977, NE Tanna Island, 19°25’S, 169°29’E, 410-505 m, 1 spm. — Stn DW 978, NE Tanna Island, 19°23’S, 169°27’E, 408-413 m, 1 spm, 4 lv, 4 rv. — Stn DW 1019, E Efate Island, 17°38’S, 168°34’E, 397-430 m, 1 lv. — Stn CP 1088, NE Espiritu Santo Island, 15°09’S, 167°15’E, 425-455 m, 1 spm, 1 rv. — Stn CP 1091, NE Espiritu Santo Island, 15°10’S, 167°13’E, 344-350 m, 1 lv. — Stn DW 1108, NE Espiritu Santo Island, 15°05’S, 167°15’E, 405-419 m, 3 spm, 3 lv, 2 rv.
New Protocardiinae (Mollusca, Bivalvia) from Southwest Pacific
Poutiers J.-M.
Fiji. MUSORSTOM 10, stn DW 1319, Bligh Water, 17°15.6’S, 178°01.9’E, 341-347 m, 1 spm, 3 lv. — Stn CP 1325, Bligh Water, 17°16.4’S, 177°49.8’E, 282-322 m, 2 sh, 1 lv, 1 rv. — Stn CP 1327, Bligh Water, 17°13.3’S, 177°51.6’E, 370-389 m, 1 lv (incomplete). — Stn CP 1348, SE Viti Levu, 17°30.3’S, 178°39.6’E, 353- 390 m, 1 spm. — Stn CP 1388, S Viti Levu, 18°18.8’S, 178°01.8’E, 313-446 m, 1 sh.
BORDAU 1, stn CP 1411, NE Vanua Levu, 16°05’S, 179°28’W, 390-403 m, 1 rv. — Stn DW 1450, Somosomo Strait, 16°44’S, 179°58’E, 327-420 m, 1 spm, 1 lv. — Stn CP 1467, NE Labeka, 18°12’S, 178°36’E, 417-427 m, 1 rv.
Tonga. BORDAU 2, stn DW 1509, NW Tongatapu, 21°05’S, 175°22’W, 456-510 m, 2 lv. — Stn CP 1510, NW Tongatapu, 21°05’S, 175°23’W, 461-497 m, 3 sh, 5 lv, 9 rv. — Stn DW 1520, Eua, 21°25’S, 175°03’W, 447-450 m, 1 spm, 1 sh, 8 lv, 11 rv. — Stn CP 1526, Eua, 21°16’S, 174°59’W, 463-464 m, 4 sh, 3 lv, 1 rv. — Stn CP 1527, Eua, 21°16’S, 174°59’W, 417-424 m, 2 spm, 1 sh, 5 lv, 5 rv. — Stn DW 1544, SW Tongatapu, 21°18’S, 175°18’W, 441-443 m, 1 spm, 1 rv. — Stn CP 1545, SW Tongatapu, 21°17’S, 175°17’W, 444-447 m, 6 spm (broken), 12 sh (some incomplete), 10 lv, 9 rv. — Stn CP 1546, SW Tongatapu, 21°18’S, 175°18’W, 430- 441 m, 1 lv. — Stn CP 1547, SW Tongatapu, 21°24’S, 175°18’W, 488-491 m, 1 lv, 1 rv. — Stn DW 1549, S Nomuka Group, 20°38’S, 175°00’W, 500 m, 1 lv. — Stn DW 1555, N Nomuka Channel, 20°11’S, 174°45’W, 591 m, 1 lv. — Stn CP 1560, N Kotu Group, 19°52’S, 174°39’W, 365-372 m, 1 sh, 1 lv. — Stn CP 1562, N Kotu Group, 19°52’S, 174°42’W, 417-424 m, 2 sh, 4 lv, 9 rv. — Stn CH 1564, N Kotu Group, 19°52’S, 174°39’W, 371-387 m, 1 rv. — Stn DW 1571, N Ha’apai Group, 19°42’S, 174°32’W, 389-418 m, 2 lv, 3 rv. — Stn CP 1572, N Ha’apai Group, 19°42’S, 174°31’W, 391-402 m, 3 spm, 3 lv, 6 rv. — Stn CP 1593, N Ha’apai Group, 19°06’S, 174°18’W, 436-442 m, 2 lv, 1 rv. — Stn DW 1595, N Ha’apai Group, 19°03’S, 174°19’W, 523-806 m, 1 rv. — Stn DW 1614, “Seamount”, 23°02’S, 175°51’W, 429-549 m, 2 lv. — Stn DW 1617, “Seamount”, 23°03’S, 175°33’W, 483-531 m, 1 lv (fragmentary), 1 rv. — Stn DW 1628, “Seamount”, 23°22’S, 176°18’W, 400-416 m, 1 lv, 1 rv. — Stn DW 1631, “Seamount”, 23°23’S, 176°18’W, 407-443 m, 2 spm (incomplete), 1 sh, 5 lv, 6 rv. — Stn DW 1633, “Seamount”, 22°59’S, 175°35’W, 442-453 m, 1 rv. — Stn CP 1638, NW Tongatapu, 21°05’S, 175°23’W, 469-520 m, 1 sh. — Stn CP 1640, NW Tongatapu, 21°09’S, 175°24’W, 564- 569 m, 1 rv. — Stn CP 1641, NW Tongatapu, 21°09’S, 175°22’W, 564-569 m, 1 lv, 1 rv.
DISTRIBUTION. — West Pacific, from off New Caledonia and eastern Coral Sea to Fiji and Tonga islands, north to Vanuatu and south to northern Norfolk Ridge, in
270-806 m (living in 327-590 m). According to Marshall
(2005 in litt.), this species occurs also more in the South, on Norfolk Ridge (S of Norfolk Island) and Kermadec Ridge.
DESCRIPTION
Shell equivalve, medium-sized for the genus (attaining nearly 20 mm in height), well inflated and generally a little higher than long in the adult (length/height ratio 0.84 to 0.96), quite variable in shape with a more or less asymmetrical and roughly trapezoidal outline. Shell wall moderately thin to thin and brittle, depending on specimen examined. Umbones prosogyrate, rather prominent, situated slightly in front of mid-length of valves. Anterodorsal margin slightly convex and decidedly slanted, meeting the distinctly convex anterior margin in a slightly rounded, obtuse angulation. Posterior margin relatively high, straightish to somewhat sinuate in the middle, forming a rounded angle both with the evenly curved ventral margin and with the subhorizontal, slightly convex posterodorsal margin.
| MNHN |
Museum National d'Histoire Naturelle |
| NSMT |
National Science Museum (Natural History) |
No known copyright restrictions apply. See Agosti, D., Egloff, W., 2009. Taxonomic information exchange and copyright: the Plazi approach. BMC Research Notes 2009, 2:53 for further explanation.
