Platidia anomioides (Scacchi & Philippi, 1844)

Bitner, Maria Aleksandra, 2009, Recent Brachiopoda from the Norfolk Ridge, New Caledonia, with description of four new species, Zootaxa 2235, pp. 1-39 : 16

Platidia anomioides (Scacchi & Philippi, 1844)

( Fig. 9 B–H)

This is a cosmopolitan brachiopod (see Logan 2007), noted also from the vicinity of New Caledonia ( Laurin 1997) and now from the Norfolk Ridge. Laurin (1997) also reported P. davidsoni (Deslongchamps, 1855) from the Norfolk Ridge. These two species are very similar externally but can be readily distinguished by their internal structures ( Logan 1979; Logan et al. 2008); descending branches present in P. anomioides are absent in P. davidsoni . However, Laurin (1997) did not describe the internal structures of the specimens investigated by him, thus it is difficult to know which Platidia species was present. In the studied material, P. anomioides was found in a single sample on Zorro seamount at 609 m.

Figures

FIGURE 9. A, Phaneropora galatheae Zezina, 1981 a, dorsal view of complete specimen, Norfolk Ridge, Norfolk 1 Stn DW 1724, 200 – 291 m, MNHN BRA- 3158. B – H, Platidia anomioides (Scacchi & Philippi, 1844), Norfolk Ridge, Norfolk 2 Stn DW 2073, 609 m; B – E, dorsal valve, inner, enlargement (C) and lateral (D, E) views to show details of brachial skeleton, MNHN BRA- 3159; F-H, ventral and dorsal views of complete specimen, and enlargement (H) of the ventral shell surface to show nodes, MNHN BRA- 3160. All SEM.