Spiriferideand Spiriferinide Brachiopods Acrossthe Devonianand Carboniferous Boundaryin Western Junggar, Xinjiang
详细信息
- 责任者：Zong Pu(School of Earth and Space Sciences ; Peking University ; Key Laboratory of Orogenic Belts and Crustal Evolution ; Beijing 100871) ; Ma Xueping
- 刊名：Acta Palaeontologica Sinica
- 出版年：2012
- 卷期：51(2)
- 页码：p.157-175
- issnNo：ISSN0001-6616
- isbnNo：CN32-1188/Q
摘要
Six genera and seven species of spiriferide and spiriferinide brachiopods are described from three upper Devonian-lower Carboniferous boundary sections (Bulongguoer, Hebukehe, and Emuha), near Hoxtolgay Town, Hoboksar County, Xinjiang. These brachiopod species are Austrospirifer? sp., Spirifer gapeevi Simorin, Unispirifer persianum Brice, Syringothyris textiformis F M Zhang, Syringothyris hannibalensis (Swallow), Histosyrinx sp. and Tylothyris sp. Amongst them, Austrospirifer? sp., Syringothyris hannibalensis (Swallow) and Histosyrinx sp. were discovered from the upper part of the Famennian, whilst the others were colleted from Late Devonian Famennian to Early Carboniferous strata. The ventral internal structures of both Syringothyris textiformis F M Zhang and Syringothyris hannibalensis (Swallow) are mainly characterized by having a well-developed syrinx and lacking a median septum, but the former species possesses a distinctly thickened ventral posterior (callus deposits) and a much longer syrinx. Early Carboniferous Tournaisian brachiopod specimens (especially spiriferide and spiriferinide taxa) in this study are relatively rare compared with those of the latest Famennian, which makes a meaningful comparison of brachiopod faunas impossible. The Late Devonian-Early Carboniferous spiriferide and spiriferinide brachiopods of western Junggar, which can tentatively be named the Syringothyris-Spirifer assemblage, are similar to contemporaneous assemblages of Kazakstan, Kuznetsk Basin, Moscow Basin and North America, and are distinctively different from those of South China.