J Syst Evol ›› 2011, Vol. 49 ›› Issue (4): 372-378.DOI: 10.1111/j.1759-6831.2011.00118.x

• Research Articles • Previous Articles    

A neotype for Colpodexylon gracilentum Dou (Lycopsida) from the Middle Devonian of North Xinjiang, China

Hong-He XU* Yi WANG   

  1. (State Key Laboratory of Palaeobiology and Stratigraphy, Nanjing Institute of Geology and Palaeontology, Chinese Academy of Sciences, Nanjing 210008, China)
  • Received:2010-04-15 Published:2011-05-22

Abstract: According to newly collected and well preserved specimens, herbaceous lycopsids Colpodexylon gracilentum Dou and Colpodexylon laminatum Dou from the late Middle Devonian of Xinjiang, NW China are reduced to C. gracilentum, for which a neotype is designated and emended diagnosis is given. Colpodexylon gracilentum has leaves with three nearly equal segments, an elliptical sporangium adaxially attached by a pad on the isomorphic sporophyll.

Key words: Colpodexylon, Devonian, lycopsid, neotype, Xinjiang