Denglongia

Name

Denglongia

Rank

Genus

Authors (Pub.)

Xue J.-Z. Hao S.-G.  

Publication

Denglongia hubeiensis gen. et sp. nov., a new plant attributed to Cladoxylopsida from the Upper Devonian (Frasnian) of South China [2008/12]

Journal

International Journal of Plant Sciences

Volume

169

Issue

9

Page number

1315

Year

2008

Parent Taxon

[Class] Cladoxylopsida

Fossil Status

stems (with sporangia)

Type

Denglongia hubeiensis

Diagnosis

Plant monopodial, with nodose and ridged main axis. Dense aerial roots attached on basal nodes of main axis. Whorls of four to six first-order branches, sterile or fertile, inserted at nodes of main axis, separated by conspicuous internodes. First-order branches, with proximal alternate or subopposite sterile ultimate appendages and distal whorls of second-order branches, three or four at each node. Sterile ultimate appendages planate or three-dimensional, composed of dichotomous branching systems, with three to six successive dichotomies. One or two pairs of umbrella-shaped fertile structures, attached suboppositely on proximal portions of first-order branches; fertile structure with an initial dichotomy forming two sister branches, along which lateral branches are alternately arranged in a pinnate pattern; each lateral branch further dichotomizing several times. Small, fusiform sporangia in clusters of two to four, terminating short branchlets along inner side of lateral branches. Anisosporous.