Just out | New Sphenophyllum plant from the Upper Devonian of Zhejiang Province, China @ Historical Biology


Just out @ Historical Biology


New Sphenophyllum plant from the Upper Devonian of Zhejiang Province, China


Author(s)

Pu Huang, Lu Liu, Min Qin, Le Liu, Zhenzhen Deng, Deming Wang, James F. Basinger & Jinzhuang Xue


Abstract:

Sphenophyllum was an important and long-surviving sphenopsid genus in the Paleozoic floras, with a worldwide distribution. A new species, Sphenophyllum changxingense sp. nov., is described from the Upper Devonian Wutong Formation of Changxing County, Zhejiang Province, China. This plant is characterized by two orders of slender axes and wedge-shaped leaves borne in whorls. The axes bear short spines and show longitudinal ridges and furrows on surface. Three to eight isophyllous leaves, with one, two, or no second-order axes, are attached at each node of first-order axes. Leaves bear spines and show a bilobate morphology; the two leaf lobes divide distally to form several marginal segments, each segment with a leaf vein. Sphenophyllum changxingense represents an early and primitive species within the genus, in light of the absence of heterophylly and specialized hook-like leaves. Like some Carboniferous and Permian species, it appears to have formed dense mats with mutually supportive axes. This plant adds to the known diversity of early sphenopsids in the Late Devonian.

Keywords: Sphenophyllum, sphenopsid, leaf morphology, Wutong Formation, Devonian, fossil plant


DOI: 10.1080/08912963.2017.1322077


READ IT HERE: http://www.tandfonline.com/doi/full/10.1080/08912963.2017.1322077

Lurdes Fonseca

Assistant Professor and Researcher at University of Lisbon
Sociologist (PhD), Paleontologist (Researcher in Micropaleontology), Majors in Sociology and Biology, Minor in Geology. Main interests in Paleontology: Microfossils, Molecular fossils, Paleobiology and Paleoecology. (read more about me)