Kanakythyris pachyrhynchos Laurin, 1997

Bitner, Maria Aleksandra, 2009, Recent Brachiopoda from the Norfolk Ridge, New Caledonia, with description of four new species, Zootaxa 2235, pp. 1-39 : 11

Kanakythyris pachyrhynchos Laurin, 1997

( Fig. 6 G–J)

This is the first record of this species from the Norfolk Ridge. It is characterized by the strongly thickened posterior part of the shell and curved beak with a very small foramen. The species is a member of the same family and subfamily as S. crosnieri . It was found on only two seamounts ― Munida and Kaimon Maru ( Tables 1, 2) with a depth range of 295–410 m ( Fig. 14 ). Kanakythyris pachyrhynchos was originally described by Laurin (1997) from the Loyalty Islands and New Caledonia. It is not yet known from any other region and can be regarded as endemic to New Caledonia and adjacent waters.

Figures

FIGURE 14. Depth ranges of particular brachiopod species collected during the Norfolk 1 and Norfolk 2 cruises to the Norfolk Ridge, New Caledonia.

FIGURE 6. A – D, Xenobrochus australis Cooper, 1981, Norfolk Ridge, Norfolk 2 Stn DW 2081, 500 – 505 m, SEM; A, dorsal view of complete specimen, MNHN BRA- 3139, B – D, inner view of dorsal valve, enlargement (C) and oblique (D) views of posterior part to show details of brachial skeleton, MNHN BRA- 3140. E, F, Dyscolia johannisdavisi (Alcock, 1894), Norfolk Ridge, Norfolk 2 Stn DW 2086, 707 – 777 m, outer and inner views of dorsal valve, brachidium not preserved, MNHN BRA- 3141. G-J, Kanakythyris pachyrhynchos Laurin, 1997, Norfolk Ridge; G – I, dorsal, lateral and anterior views of complete specimen, Norfolk 2 Stn DW 2092, 320 – 345 m, MNHN BRA- 3142; J, SEM micrograph of dorsal interior to show cardinalia and brachidium, Norfolk 2 Stn DW 2136, 402 – 410 m, MNHN BRA- 3143. K – M, Stenosarina crosnieri (Cooper, 1983), Norfolk Ridge, Norfolk 2 Stn DW 2069, 795 – 852 m; K, L, dorsal and lateral views of complete specimen, MNHN BRA- 3144; M, SEM micrograph of dorsal interior to show brachial skeleton, MNHN BRA- 3145.