The INTERNATIONAL FOSSIL PLANT NAMES INDEX
Global registry of scientific names of fossil organisms covered by the International Code of Nomenclature for Algae, Fungi, and Plants and the International Code of Zoological Nomenclature © 2014-2022

IDNAME urn:idName:ifpni.org:species:F8E50BAC-1E0E-4CD7-BAB4-D1E84940F23C species
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Estinnophyton yunnanense

Estinnophyton yunnanense S.-G. Hao, De-M. Wang, Q. Wang Bot. J. Linn. Soc., 146(2): 202. 6 Oct 2004
Name
Estinnophyton yunnanense
Rank
Species
Generic Name
[Genus] Estinnophyton
Authors (Pub.)
Hao S.-G. Wang D.-M. Wang Q.  
Publication
A new species of Estinnophyton from the Lower Devonian Posongchong Formation, Yunnan, China; its phylogenetic and palaeophytogeographical significance [2004/10]
Journal
Botanical Journal of the Linnean Society
Volume
146
Issue
2
Page number
202
Year
2004
Fossil Status
stems (with sporophylls)
Stratigraphy
Pragian
Location
Mountain outcrop approximately 200 m west of Zhichang village, Gumu Town, Wenshan District, Yunnan Province, China
Paleoregion
Cathaysia (South)
Data for Holotypus
Repository
Beijing University, Department of Geology, Beijing, China
Repository Number
BUH-Es.01
Diagnosis
STEMS slender, 1.1–(2.6)-4.0 mm wide (N = 18), isotomously branching at angles of 30–50∞. Rounded or narrowly oval protuberances or depressions, representing leaf bases, alternately arranged in a low spiral or pseudowhorled pattern, three to six of each gyre. Sometimes decurrent bases connect with ridges, due to preservational crushing. VEGETATIVE LEAVES persistent attached on the axis at various angles, from acute to approximately right angles. Successive distance between (leaf) gyres 2.0–(2.8)- 3.5 mm (N = 24). Leaves 3.3–(4.2)-5.0 mm long (N = 28) and 0.4–(0.6)-0.8 mm wide (N = 16) at base, once or closely twice bifurcate, branching c. 3/5 from the base, the resulting segments diverging at angles of 60–70∞. Ultimate segments 0.8–(1.3)-1.8 mm long (N = 28) and about 0.1–0.2 mm wide, tapering to expanded oblate or truncated apices. FERTILE LEAVES with two stalked and recurved sporangia, borne adaxially on either side below or near the division of the once bifurcate leaf, or below the points of successive divisions in a twice bifurcate leaf. SPORANGIA ovoid-elongate, 1.5–(1.8)–2.0 (N = 32) mm long and 0.6–(0.7)–0.8 mm wide (N = 26). Sporangial stalks 0.3–(0.5)-0.7 mm long (N = 12) and c. 0.2 mm wide. ISOSPORES with subtriangular amb, 16–(21)-25 mm in diameter (N = 36). Trilete rays simple, extending to 1/2–2/3 of the radius.

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