Brachiopods from the Chlamys Ledge Member (Polonez Cove Formation, Oligocene) of King George Island, West Antarctica

Abstract

Abstract:Brachiopods from the Chlamys Ledge Member, uppermost part of the Polonez Cove Formation (Oligocene), of King George Island, West Antarctica are represented by the undeterminable Rhynchonellida, one short−looped terebratulide Liothyrella Thomson, and two long−looped terebratellidines: Rhizothyris Thomson and Terebratelloidea gen. et sp. indet. Liothyrella is a well known genus in the Cenozoic strata and Recent waters of the Southern Hemisphere, while Rhizothyris is noted for the second time in the Antarctic re− gion. This is the first record of brachiopods from the Chlamys Ledge Member.

Shell beds from the Low Head Member (Polonez Cove Formation, early Oligocene) at King George Island, west Antarctica: new insights on facies analysis, taphonomy and environmental significance

“…2008, Bitner et al . 2009). Fossil specimens are mostly fragmented and sparsely distributed along the unit, except for the base of the Low Head Member at its type area (Troedson & Smellie 2002) which contains relatively extensive and thick shell beds – the subject of this work (Figs 1 & 2).…”

Invertebrates from the Low Head Member (Polonez Cove Formation, Oligocene) at Vauréal Peak, King George Island, West Antarctica

“…The so called “pecten conglomerate” of the Low Head Member (Adie 1962, Barton 1965, discussed in Birkenmajer & Gazdzicki 1986, and Birkenmajer 2001) in the type-area, is the most fossiliferous component of the Polonez Cove Formation. It contains marine macro- and microfossils, including coccoliths, diatoms, foraminifers, polychaete worms, bryozoans, brachiopods, gastropods, scaphopods and echinoderms (Bitner & Pisera 1984, Gazdzicki & Pugaczewska 1984, Jesionek-Szymanska 1984). Some taxa described herein are comparable with fossils previously described from the “pecten conglomerate”; others are for the first time described for the Polonez Cove Formation or even for KGI.…”

“…from Vauréal Peak differs from Liothyrella sp. from Cape Melville Formation (Lower Miocene) at Melville Peninsula (Bitner & Crame 2002) in its greater size, more circular shape and higher convexity of the dorsal valve. It is impossible to compare other features of the two taxa because only external characters of the Miocene Liothyrella sp.…”

“…The Polonez Cove Formation, cropping out at King George Island (KGI), West Antarctica (Fig. 1), preserves a diverse Cenozoic marine biota that has been subject of numerous papers dealing with coccoliths (Gazdzicka & Gazdzicki 1985), foraminifers, ostracods (Blaszyk 1987), brachiopods (Bitner & Pisera 1984, Bitner & Thomson 1999), polychaete worms, bryozoans, gastropods, bivalves (Gazdzicki & Pugaczewska 1984), scaphopods (Pugaczewska 1984), and echinoderms (Jesionek-Szymanska 1984). The Low Head Member of the Polonez Cove Formation is a richly fossiliferous unit (Bitner & Thomson 1999), and crops out at various sites along the eastern coast of KGI.…”

Nuculidae (Bivalvia) in the Cape Melville Formation, King George Island, Antarctica, with an overview of the bivalve fauna

“…The fauna includes gastropods (Karczewski 1987), solitary corals (Roniewicz & Morycowa 1985), a nephropid lobster (Feldmann & Crame 1998), crabs (Förster et al . 1987), brachiopods (Bitner & Crame 2002), bryozoans (Hara & Crame 2004), echinoids (Jesionek-Szymańska 1987), scaphopods, polychaetes (Szaniawski & Wrona 1987) and bivalves (Jonkers 2003, Anelli et al . 2006, Whittle et al .…”