Journal of the Royal Society of New Zealand abstracts

---

Marine Mollusca of oxygen isotope stages of the last 2 million years in New Zealand. Part 2. Biostratigraphically useful and new Pliocene to Recent bivalves

A. G. Beu¹

¹GNS Science, PO Box 30368, Lower Hutt 5040, New Zealand. a.beu@gns.cri.nz

Abstract   New Zealand Plio-Pleistocene bivalves revised: Limopsis, oysters, Pecten, Mactra (Maorimactra), Oxyperas, Lutraria, Austrovenus, Barnea, Myadora. Recent Indo-West Pacific Lutraria species are reviewed; the Red Sea-East African species L. (Lutraria) turneri Jousseaume resembles L. grandis (Hutton) (adopted in place of the junior homonym L. solida Hutton). Six new species proposed: Saccella maxwelli (Nukumaruan-Recent; known previously as S. bellula (A. Adams)); Limopsis turnbulli (Castlecliffian, OIS 15 - 20, SW Fiordland); Mactra (Maorimactra) marwicki (late Nukumaruan); M. (Maorimactra) carteri (early Castlecliffian, OIS 45? - 19); Paphies delta (early Castlecliffian, OIS 31? - 17); Myadora fortecosta (Kapitean-Opoitian). Further Indo-West Pacific warm-water migrants to New Zealand: Chama ruderalis Lamarck (Kapitean-Nukumaruan; = C. huttoni Hector, = C. pittensis Marwick); Lutraria (Psammophila) vellai (Beu) (late Nukumaruan); probably the two New Zealand late Neogene Ctenoides species. Further temperate migrant from the Atlantic: Lutraria (Lutraria) grandis. New synonymy: Xenostrobus Wilson = Limnoperna Rochebrune; Pecten novaezelandiae (Reeve) = all other New Zealand Pecten names; Serratina eugonia (Suter) = S. charlottae (E. A. Smith); Oxyperas komakoensis (Carter) = O. elongata (Quoy & Gaimard); Austrovenus stutchburyi (Wood) varies clinally over New Zealand, = A. aucklandica Powell, = A. crassitesta Finlay; Dosinia (Austrodosinia) horrida Marwick = D. anus (Philippi) (Nukumaruan-Recent); Panopea wanganuica Powell = P. smithae Powell (Nukumaruan-Recent); Myadora stephaniae Carter = M. waitotarana Powell (Waipipian-Nukumaruan). Distinctive bivalves extinct at the end of Nukumaruan time: Glycymeris shrimptoni Marwick, Patro undatus (Hutton), Lutraria (Lutraria) grandis, L. (Psammophila) vellai, Paphies crassiformis (Marshall & Murdoch), Eumarcia plana Marwick, Dosinia (Raina) nukumaruensis Marwick, Myadora waitotarana. Ennucula Iredale is used for Cenozoic and Recent Nuculominae; the application of Leionucula Quenstedt is unclear. Saccostrea glomerata (Gould) is used in place of S. circumsuta (Gould). Protothaca crassicosta (Deshayes) (formerly Haweran-Recent) is recorded from Opoitian rocks. Pecten novaezelandiae appeared below Potaka Tephra (1.0 Ma) during OIS 29 or earlier in eastern New Zealand, but just above the Brunhes-Matuyama transition (0.78 Ma, early OIS 19) in Wanganui Basin. Oxyperas elongata and Barnea similis (Gray) changed anagenetically through late Miocene-Pleistocene time; earlier forms are conspecific with Recent ones. Tawera Marwick is restored as a genus. Purpurocardia Maxwell is compared with Glans Megerle von Muhlfeld and Glyptoactis Stewart, and all are retained. Limnoperna huttoni (Suter) became extinct during OIS 13, Barytellina crassidens Marwick during OIS 9 or younger. Pholadidea tridens (Gray) (OIS 23 & 5a) and Ostreola virescens (Angas, 1868) are recorded fossil.

Keywords   biostratigraphy; Bivalvia; Castlecliffian; dispersal; evolution; Haweran; Holocene; Mollusca; new species; New Zealand; Nukumaruan; oxygen isotope stages; Pleistocene; Pliocene; taxonomy; time scale; Wanganui Basin

R06008 Received 23 June 2006; accepted 31 October 2006; Online publication date 14 November 2006

Journal of the Royal Society of New Zealand
Volume 36, Number 4, December, 2006, pp 151–338

PDF file of entire paper: Print-quality (30224K) | screen-quality (2949K)

---

This year's abstracts | Journal home page | All abstracts | Publishing home page