Frenulina Dall, 1895

Bitner, Maria Aleksandra & Logan, Alan, 2016, Recent Brachiopoda from the Mozambique-Madagascar area, western Indian Ocean, Zoosystema 38 (1), pp. 5-41 : 22-24

Genus Frenulina Dall, 1895

TYPE SPECIES. — Anomia sanguinolenta Gmelin, 1791 , by original designation of Dall (1895: 724).

Frenulina sanguinolenta ( Gmelin, 1791) ( Fig. 13A ; Table 12)

Anomia sanguinolenta Gmelin, 1791: 3347 .

Megerlia sanguinea – Davidson 1887: 108-111, pl. 20, figs 1-8.

Frenulina sanguinolenta – Dall 1920: 336-337. — Hatai 1940: 327- 329, pl. 4, figs 42, 44-47, 49, 50, 52-54. — Cooper 1973a: 21-22, pl. 6, figs 1-3; pl. 8, figs 12-16. — Zezina 1985: 168. — Emig 1987: 169, pl. 2.V.1, figs b, c. — d’Hondt 1987: 38. — Saito 1996: 492, fig. 5. — Laurin 1997: 450-451, fig. 47H-J. — Bitner 2006a: 420- 422, figs 2D-M, 3A-F; 2006b: 28; 2008: 439, Fig. 10 C-G; 2009: 16, 7F-H; 2010: 649, fig. 3K-M; 2014: 250-253, fig. 8A-E.

MATERIAL EXAMINED. — North-West Madagascar. MIRIKY, stn DW 3230, 1 bivalved specimen.

South Madagascar. ATIMO VATAE, stn TA 01, 1 bivalved specimen. — Stn TB01, 1 bivalved specimen. — Stn TS09, 2 bivalved specimens. — Stn DW 3519, 2 bivalved specimens. — Stn DW 3531, 3 bivalved specimens. — DW 3532, 1 bivalved specimen. — Stn DW 3534, 1 bivalved specimen.

DEPTH RANGE. — 5- 158 m.

MEASUREMENTS. — See Table 12.

REMARKS

Frenulina sanguinolenta is a common and widely distributed species in the Pacific region and has been recorded by many authors (see Bitner 2006 a, b, 2008, 2009, 2010, 2014). Apart from a contentious occurrence of a single specimen from the eastern Mediterranean ( Taddei Ruggiero 2000; Logan et al. 2004) the species appears to be otherwise restricted to the Pacific Ocean . Cooper (1973a) described Frenulina cruenta from the coast of Mozambique and Somalia in the western Indian Ocean and distinguished it from F. sanguinolenta by its greater size, more intense colour banding and conjunct deltidial plates, in contrast to the disjunct deltidial plates usually seen in F. sanguinolenta . Here we record F. sanguinolenta for the first time from the Indian Ocean and also note the presence of several specimens attached to corals from shallow reefs of Toleara, South-West Madagascar collected by Bernard Thomassin in 1975 and presented to A. Logan for study.

Figures

FIG. 13. — A, Frenulina sanguinolenta (Gmelin, 1791), dorsal view of complete specimen (MNHN IB-2013-77), South Madagascar, Bay of Galions, ATIMO VATAE, stn TA01, 7-14 m, SEM. B-E, Jolonica suffusa (Cooper,1973):B, C, interior views of dorsal and ventral valves, showing brachidium, of open specimen (MNHN IB- 2013-78), Mozambique Channel, Maputo transect,MAINBAZA,stn CP 3130, 112-127 m, D, E, inner view of ventral valve (MNHN IB-2013-79), and tilted view (H) to show dentral plates, North-West Madagascar, between Majumga and Cap Saint-André, MIRIKY, stn CP 3261, 197-217 m. Scale bars: A, 2 mm; B-E, 5 mm.

FIG. 10. — A-D, Eucalathis magna Cooper, 1981, ventral, dorsal, lateral and anterior views of complete specimen (MNHN IB-2013-60), South Madagascar, sector of Manantenina, stn DW 3529, 402-407 m; E-O, Eucalathis daphneae n. sp., North-West Madagascar, MIRIKY, SEM: E, inner view of ventral valve (MNHN IB- 2013-62), paratype, West of Cap d’Ambre, stn DW 3196, 238-249 m; F-J, dorsal view of complete specimen, enlargement of umbonal part (G) and anterior view to show rounded ribs (H), and inner view of dorsal valve (I, J) of the same specimen to show cardinalia and loop, holotype (MNHN IB-2013-61), West of Nosy Be, stn DW 3234, 187-247 m; K-O, inner view of dorsal valve (MNHN IB-2013-63), enlargement (L) and tilted (M) views of posterior part,and a fragment of incomplete transverse band (O), paratype, stn DW 3196, 238-249 m. Scale bars: A-D, 5 mm; E, F, H, I, K, 2 mm; G, J, L,1 mm; M, 500 µm; O, 200 µm.