记述河南义马中侏罗世义马组一新的苔类植物-义马中国鳞苔Sinolejeunea yimaensis gen. et sp. nov.此植物茎叶体和生殖器官(雌苞和雄苞)的形态特征及叶细胞构造与叶苔目(Jungermanniales)顶蒴叶苔亚目(Acrogyniineae)有着一定的亲缘关...记述河南义马中侏罗世义马组一新的苔类植物-义马中国鳞苔Sinolejeunea yimaensis gen. et sp. nov.此植物茎叶体和生殖器官(雌苞和雄苞)的形态特征及叶细胞构造与叶苔目(Jungermanniales)顶蒴叶苔亚目(Acrogyniineae)有着一定的亲缘关系,并与细鳞苔科 (Lejeuneaceae)某些现代属颇为相似.配子体长有生殖器官(雌苞和雄苞)的苔类化石全球仅报道过一属,在叶苔目中,尚为首次记录;配子体分化成茎叶状的苔类化石也非常少见,全球仅报道过4属10余种.因此,当前珍稀苔类化石在我国中侏罗世的发现颇具科学意义.展开更多
A new liverwort with perichaetium and perigonium collected from the Middle Jurassic Yima Formation is described.Gametophyte is dorsivental,irregularly branched,bearing two-ranks of lateral leaves obliquely attached to...A new liverwort with perichaetium and perigonium collected from the Middle Jurassic Yima Formation is described.Gametophyte is dorsivental,irregularly branched,bearing two-ranks of lateral leaves obliquely attached to main axis,and one rank of ventral leaves transversely attached to ventral surface of the axis.Lateral branch bearing perigonium arises from axil of ventral leaves.Perigonium consists of small paired perigonial bracts arranged in a spike.Two perichaetia are borne on the top of lateral branches with an ovate perianth bearing longitudinal ridges and grooves.Setae are thin and straight and stretch out from the aristulate perianth mouth.General morphology of this fossil bears resemblance to some living liverworts of Jungermanniales.It is so far the oldest fossil record of Jungermanniales in the world.展开更多
文摘记述河南义马中侏罗世义马组一新的苔类植物-义马中国鳞苔Sinolejeunea yimaensis gen. et sp. nov.此植物茎叶体和生殖器官(雌苞和雄苞)的形态特征及叶细胞构造与叶苔目(Jungermanniales)顶蒴叶苔亚目(Acrogyniineae)有着一定的亲缘关系,并与细鳞苔科 (Lejeuneaceae)某些现代属颇为相似.配子体长有生殖器官(雌苞和雄苞)的苔类化石全球仅报道过一属,在叶苔目中,尚为首次记录;配子体分化成茎叶状的苔类化石也非常少见,全球仅报道过4属10余种.因此,当前珍稀苔类化石在我国中侏罗世的发现颇具科学意义.
基金supported by Knowledge Innovation Program of the Chinese Academy of Sciences (Grant No. KZCX2-YW-154)National Basic Research Programme of China (Grant No. 2006CB701400)
文摘A new liverwort with perichaetium and perigonium collected from the Middle Jurassic Yima Formation is described.Gametophyte is dorsivental,irregularly branched,bearing two-ranks of lateral leaves obliquely attached to main axis,and one rank of ventral leaves transversely attached to ventral surface of the axis.Lateral branch bearing perigonium arises from axil of ventral leaves.Perigonium consists of small paired perigonial bracts arranged in a spike.Two perichaetia are borne on the top of lateral branches with an ovate perianth bearing longitudinal ridges and grooves.Setae are thin and straight and stretch out from the aristulate perianth mouth.General morphology of this fossil bears resemblance to some living liverworts of Jungermanniales.It is so far the oldest fossil record of Jungermanniales in the world.
