湘西北地区志留、泥盆系遗迹化石再研究

A RESTUDY ON SILURIAN─DEVONIAN ICHNOFOSSILS FROM NORTHWESTERN HUNAN AREA

记述了湘西北地区志留、泥盆系的遗迹化石１４属，２８种、亚种（包括１５新种，２新亚种）。这些遗迹化石主要集中于Ｔｒａｕｅｕｍｉｃｈｉｓ－Ａｒｔｈｒｏｐｈｙｃｕｓ群落（代表前滨下部或近滨上部），Ｔｈａｌａｓｓｉｎｏｉｄｅｓ－Ｌｏｃｋｅｉａ群落（代表近滨上部或前滨下部环境）和Ｃｒｕｚｉａｎａ－Ｄｉｍｏｒｐｈｉｃｈｎｕｓ群落（代表近滨环境），并对上述３个遗迹群落的古生态作了分析。

Here described are Silurian-Devonian ichnofossils from northwestern Hunan, with a total of 14 genera,28 species and 2 subspecies(including 15 new species and 2 new subspecies).These ichnofossils are mainly concentrated in the Thaueumichis-Arthrophycus Community (representing the lower part of foreshore or the upper part of nearshore),the Thalassinoides-Lockeia Community (representing the environment in the upper part of nearshore or the lower part of foreshore)and the Cruziana-Dimorphichus Community(representing the nearshore environment).An analysis also has been made on the palaeoecology of these 3 ichnocoenoses.