摘要:

The present paper describes and illustrates an Early Permian brachiopod fauna collected from two localities from the upper part of the type Dingjiazhai Formation near Youwang, 30 km south of Baoshan in the Baoshan block, western Yunnan, China. The brachiopod fauna is dominated byStenoscismasp. andElivina yunnanensissp. nov. and exhibits strong generic and some specific links with faunas from the Bisnain assemblage of Timor and the Callytharra Formation of Western Australia and, to a lesser extent, faunas from the Jilong Formation of southern Tibet, the Tashkazyk Formation of southeastern Pamir, the lower Toinlungkongba Formation of northwestern Tibet, the upper Pondo Group of central Tibet, and the Jimba Jimba Calcarenite of the Carnarvon Basin, Western Australia. Based on these correlations, a Late Sakmarian (Sterlitamakian) age is preferred for the Dingjiazhai brachiopod fauna. Two new species are proposed:Globiella youwangensissp. nov. andElivina yunnanensissp. nov.

ISSN:0311-5518    

DOI:10.1080/03115519608619192

出版商:Taylor & Francis Group    

年代:1996

数据来源: Taylor

摘要:

Abundant and diverse proteaceous-like triaperturate pollen from Campanian-Maastrichtian sediments in the Otway Basin, southeastern Australia are systematically documented and compared with pollen of extant Proteaceae. Segregation of fossil and extant pollen types has been effected on apertural characters of which six states have been identified. Apertures are colpoid, poroid or porate. Pores ofPropylipollisMartin & Harris, 1974 conform with those of subfamilies Grevillioideae and Carnarvonioideae. Colpoids ofBeaupreaiditesCookson emend. Martin, 1973, poroids ofLewalanipollisgen. nov., and pores ofCranwellipollisMartin & Harris, 1974 are represented in subfamilies Proteoideae and Persoonioideae. Pores ofProteaciditesCookson ex Couper, 1953 occur in subfamilies Proteoideae and Sphalmioideae. In the Otway Basin fossil record, triporate apertures appear earlier than tricolpoids, triporoids and biporates; and diversity levels of proteaceous pollen are higher than reported from elsewhere implying the region may have been a diversification centre during Campanian and Maastrichtian times.

ISSN:0311-5518    

DOI:10.1080/03115519608619193

出版商:Taylor & Francis Group    

年代:1996

数据来源: Taylor