Terebratulina d’Orbigny, 1847

Bitner, Maria Aleksandra, 2008, New data on the recent brachiopods from the Fiji and Wallis and Futuna islands, South-West Pacific, Zoosystema 30 (2), pp. 419-461 : 433-434

Genus Terebratulina d’Orbigny, 1847

TYPE SPECIES. — Anomia retusa Linnaeus, 1758 , by subsequent designation ( Brunton et al. 1967: 176).

Terebratulina japonica (G. B. Sowerby, 1846) ( Fig. 7 A-D)

Terebratula japonica G. B. Sowerby, 1846: 91 .

Terebratulina japonica – Davidson 1886: 34, pl. 3, figs 7-11. — Dall 1920: 304, 305. — Hatai 1940: 225-228, pl. 8, figs 14, 16. — Zezina 1985: 128. — Bitner 2006b: 22, 23, figs 3, 4a-g.

MATERIAL EXAMINED. — Fiji. MUSORSTOM10, Bligh Water, stn CP 1330, 9 complete specimens. — Stn DW 1333, 3 complete immature specimens. — Stn DW 1345, 2 complete immature specimens. — Viti Levu, stn CP 1363, 2 complete immature specimens. — Stn DW 1365, 3 young complete specimens. — Stn DW 1377, 4 complete specimens. — Stn DW 1383, 11 complete specimens.

BORDAU 1, Lau Ridge, stn CP 1393, 1 complete specimen. — Stn CP 1394, 24 complete specimens. — Stn CP 1397, 3 complete specimens. — Stn CP 1404, 1 complete specimen. — Stn CP 1412, 1 complete specimen. — Stn CP 1413, 15 complete specimens, 1 ventral valve. — Stn DW 1421, 1 immature complete specimen. — Stn DW 1439, 1 complete specimen. — Stn DW 1440, 2 complete specimens. — Stn DW 1450, 1 complete specimen. — Stn DW 1451, 7 complete specimens. — Stn DW 1453, 3 complete specimens. — Stn CP 1460, 9 complete specimens. — Stn DW 1472, 2 young complete specimens. — Stn DW 1486, 2 complete specimens. — Stn DW 1488, 1 complete specimen. — Stn CP 1490, 1 complete specimen. — Stn CP 1491, 2 complete specimens. — Stn DW 1498, 3 complete specimens. — Stn CP 1506, 1 complete specimen.

SUVA 2, Suva Lagoon, stn BS 18, 1 complete specimen.

DEPTH RANGE. — 83- 820 m.

MEASUREMENTS. — See Table 9.

REMARKS

This is a common species found in 28 stations. Its presence was already noted from the Fiji region ( Bitner 2006b). Terebratulina japonica is a mediumsized species, ornamented by numerous, fine ribs. The ring of the loop is subquadrate in outline (see Bitner 2006b: fig. 4f, g). Terebratulina waimanensis Ladd, 1934 described from the Miocene deposits of Fiji shows a great similarity in size and ornamentation to T. japonica .

Station No. Length Width Thickness Figure DW 1479 11.3 10.9 4.8 –

DW 1479 11.1 10.2 5.1 –

DW 1479 7.4 7.7 2.9 Fig. 7E DW 1485 10.0 10.3 4.2 Fig. 7 F-I

Terebratulina australis Bitner, 2006 ( Fig. 7 E-I)

Terebratulina australis Bitner 2006b: 25-27 , fig. 5d-j.

MATERIAL EXAMINED. — Fiji. BORDAU 1, Lau Ridge, stn DW 1417, 1 dorsal valve. — Stn DW 1479, 3 complete specimens, 1 dorsal valve. — Stn DW 1485, 1 complete specimen.

DEPTH RANGE. — 353- 707 m.

MEASUREMENTS. — See Table 10.

REMARKS

This species was already recorded from the Fiji region ( Bitner 2006b).It is very rare in the investigated material. Terebratulina australis can be easily distinguished from any other Terebratulina species by its rounded outline, short hinge margin and a very small foramen. The shell surface is covered with numerous distinct ribs that increase mostly by bifurcation.The posterior part of the shell is thickened with well-visible muscle scars. The dorsal valve interior with high, narrow inner socket ridges, short crura and a broad ring sharply arched (see Bitner 2006b: fig. 5i, j).

Figures

FIG. 7. — A-D, Terebratulina japonica (G. B. Sowerby, 1846), Fiji: A, dorsal view of complete specimen (MNHN BRA-3079), Lau Ridge, BORDAU 1, stn DW 1413, 669-676 m; B-D, dorsal, lateral and anterior views of complete specimen (MNHN BRA-3080), Bligh Water, MUSORSTOM 10, stn CP 1330, 567-699 m; E-I, Terebratulina australis Bitner, 2006,Fiji,Lau Ridge BORDAU 1; E, dorsal view of young complete specimen (MNHN BRA-3081),SEM,stn DW 1479,450-460 m; F-I, ventral,dorsal,lateral andanterior viewsof complete specimen (MNHN BRA-3082),stn DW 1485,700-707 m; J-L, Dallithyris pacifica Bitner,2006,dorsal,lateral and anterior views of complete specimen (MNHN BRA-3078), Fiji, Bligh Water,MUSORSTOM 10, stn DW 1331, 694-703 m. Scale bars:A-D, F-I, 0.5 cm; E, 2 mm; J-L, 1 cm.