中国科学院南京地质古生物研究所机构知识库

After the initial description of Ampullula Righi 1991 and Stelomorpha Yin 1994, several researchers discussed these two acritarch genera and their relationship. A literature revision and investigation of new material from South China indicate that the genus Stelomorpha is a synonym of the genus Ampullula, but Ampullula is not the synonym of the genus Tranvikium Tynni 1982 emend. Uutela and Sarjeant 2000. The generic diagnosis of Am pullula is emended. Six species belong to the genus: Ampullula calix (Quintavalle and Playford, 2008) comb. nov.. Ampullula composta (Yin etal., 1998) comb. nov., Ampultula crassula (Vavrdova, 1990) comb. et emend. nay., Ampullula erch unensis (Fang, 1986) Brocke 1997 emend. nov., Ampultula princeps Brocke 1997. and Arnpullula suetica R:ighi 1991. Ampullula was widely distributed throughout peri-Gondwana and Baltica suggesting a global distribution during the late Early-Middle Ordovician. Biostratigraphically, Ampullula is an important genus indicating upper Lower to Middle Ordovician intervals. Ampullula was first present in the eobifidus graptolite. Biozone in South China, where it possibly originated, and subsequently was also present on Baltica and other parts of the margin of Gondwana. Thus, Atnpullula was an important Early-Middle Ordovician acritarch with a global distribution, which probably was both eurythermic and eurytopic. (C) 2010 Elsevier B.V. All rights reserved.