@article {115,
	title = {Studies on Annalepis from Middle Triassic along the Yangtze river and its bearing on the origin of Iso{\"e}tes},
	journal = {Acta Botanica Sinica},
	volume = {40},
	year = {1998},
	note = {Cited By (since 1996):6Export Date: 11 November 2013Source: Scopus},
	month = {1998///},
	pages = {768 - 774},
	abstract = {Specimens of Annalepis have been found from the Middle Triassic Series in the Yangtze River valley and described, including a new species. Annalepis is similar to the living plant, Iso{\"e}tes , in many aspects, such as the herb with a corm, more or less clustering sporophylls, presence of a ligule, monolete suture microspores of Aratrisporites -type and trilete megaspores, etc. The similarities of features between the two plants indicate their close affinities and that A . brevicystis might be the ancestry of Iso{\"e}tes . Since there is a ligule on the sporophyll of Pleuromeia, the Pleuromeiaceae represented by Pleuromeia could be allied to the Iso{\"e}taceae, and both families should belong to Iso{\"e}tales. Iso{\"e}tales represents a distinct evolutionary sequence and is inferred as being evolved probably from Palaeozoic Sigillaria . In Mesozoic age, two evolutionary lines are proposed: one as a line from Pleuromeia to Nathorstiana in relation to wood-monopolar rhizophore; the other as a line from Annalenis to Iso{\"e}tes related to herb-bipolar corm. Annalepis appeared almost simultaneously in the Yangtze River valley in early Middle Triassic, but the distribution of Annalepis was concentrated from east to west during middle-late Middle Triassic, in relation to the marine regression which occurred cyclically from east to west on the Yangtze Platform during that time.},
	keywords = {Annalepis, Evolution, Isoetes, Middle Triassic, Origin, Yangtze river valley},
	url = {http://www.scopus.com/inward/record.url?eid=2-s2.0-0032414084\&partnerID=40\&md5=b6306b3189c6672809b1bab17e2dd168},
	author = {Meng, F.-S.}
}
