Exceptional preservation in Lower Devonian coalified fossils from the Welsh Borderland: a new genus based on reniform sporangia lacking thickened borders

1995 ◽  
Vol 117 (3) ◽  
pp. 233-254 ◽  
Author(s):  
D. EDWARDS ◽  
U. FANNING ◽  
K. L. DAVIES ◽  
L. AXE ◽  
J. B. RICHARDSON
Keyword(s):  
Lower Devonian ◽  
New Genus ◽  
Exceptional Preservation

Qushiaspis, a new genus of gantarostrataspid fish (galeaspida, stem-gnathostomata) from the Lower Devonian of Yunnan, China

2021 ◽  
pp. 1-9
Author(s):  
Wenyu Jiang ◽  
Min Zhu ◽  
Xiaodong Shi ◽  
Qiang Li ◽  
Zhikun Gai
Keyword(s):  
Lower Devonian ◽  
New Genus

The first zosterophyll from the Lower Devonian Rhynie Chert, Aberdeenshire

1991 ◽  
Vol 82 (4) ◽  
pp. 324-332 ◽  
Author(s):  
A. G. Lyon ◽  
Dianne Edwards
Keyword(s):  
Lower Devonian ◽  
New Genus ◽  
New Genus And Species ◽  
Early Devonian ◽  
Precise Positioning ◽  
Cortical Zone ◽  
Lack Of Information ◽  
Rhynie Chert

ABSTRACTFragmentary remains of a vascular sporophyte from the Rhynie Chert are described as a new genus and species, Trichopherophyton teuchansii. The plant, which is characterised by the possession of unicellular spinous hairs, exarch xylem and laterally attached, marginally dehiscent sporangia, is assigned to the Zosterophyllophytina, but lack of information on the arrangement of sporangia prevents its more precise positioning within the subdivision. Unusual features include the combination of circinate tips to axes with almost terete xylem strands, and the lack of a thick-walled outer cortical zone. Associated axes, lacking spinous hairs, but having papillate or rhizoid-like epidermal emergences, are interpreted as likely rhizomes of Trichopherophyton. Features, such as unicellular spinous hairs, rhizoid-like emergences, circinate tipsand parenchymatous cortex are considered in relation to the functioning and growth of aplant inhabiting an early Devonian wetland.

Rensselaerina, a new genus of Lower Devonian brachiopods

1917 ◽  
Vol s4-43 (258) ◽  
pp. 466-470 ◽  
Author(s):  
C. O. Dunbar
Keyword(s):  
Lower Devonian ◽  
New Genus

A new vascular plant from the Lower Devonian Windyfield chert, Rhynie, NE Scotland

1999 ◽  
Vol 90 (4) ◽  
pp. 331-349 ◽  
Author(s):  
Clare L. Powell ◽  
Dianne Edwards ◽  
Nigel H. Trewin
Keyword(s):  
Lower Devonian ◽  
New Genus ◽  
Vascular Plant ◽  
New Taxon ◽  
New Genus And Species ◽  
Rhynie Chert ◽  
Microbial Film

AbstractTwo plants are described from fragmentary remains preserved in the Windyfield chert, situated c. 600 m from the classic Rhynie chert locality. Both are sometimes coated by a microbial film. The larger, fertile axes are placed in the new genus and species Ventarura lyonii. They possess a distinctive, sclerenchymatous middle cortex and terete xylem, and marginally dehiscent, lateral sporangia. The new taxon is similar to the Rhynie zosterophyll Trichopherophyton teuchansii, but is placed in a new genus on sporangial differences. Associated smaller axes with unicellular epidermal outgrowths lack the middle cortex of the larger axes and often have medullated protosteles. They are interpreted as subterranean rhizomes and probably belong to the new fertile taxon, but organic continuity between the two has not been demonstrated.

scholarly journals Taungurungia gen. nov., from the Lower Devonian of Yea, central Victoria, Australia

2022 ◽  
pp. 43-53
Author(s):  
Fearghus R. McSweeney ◽  
Jeff Shimeta ◽  
John St J.S. Buckeridge
Keyword(s):  
Lower Devonian ◽  
New Genus ◽  
Land Plants ◽  
New Taxon ◽  
Internal Anatomy ◽  
Central Victoria ◽  
Early Land

This paper records a new genus Taungurungia, which is the first new taxon with emergences to be described from the Lower Devonian of Victoria. The fossil is preserved primarily as a compression and impression, and lacks internal anatomy. The fossil extends our knowledge of known variations within early land plants, with most characteristics, such as emergences and H- or K-branching, redolent of affinities with the zosterophylls. However, having a large ovate terminal sporangium, the fossil adds to taxa that in some cases have been provisonally allied to the zosterophylls with elongate sporangia; this further demonstrates the need for reassessment of the Zosterophyllopsida.

Lower Devonian calmoniid trilobites from the Argentine Precordillera: new taxa of the Bouleia Group, and remarks on the tempo of calmoniid radiation

1994 ◽  
Vol 131 (4) ◽  
pp. 449-464 ◽  
Author(s):  
Gregory D. Edgecombe ◽  
Norberto E. Vaccari ◽  
Beatriz G. Waisfeld
Keyword(s):  
Related Species ◽  
Lower Devonian ◽  
New Genus ◽  
Closely Related Species ◽  
Geographic Ranges ◽  
Assemblage Zone ◽  
Argentine Precordillera ◽  
Gradual Transformation ◽  
High Diversity ◽  
Stratigraphic Range

AbstractNew calmoniids from the Lower Devonian Talacasto Formation in the Precordillera of San Juan, Argentina, extend the stratigraphic and geographic ranges of a clade including Bouleia Kozlowski, 1923 and Parabouleia Eldredge, 1972. The new genus Talacastops accommodates the Lochkovian T. zarelae sp.nov. from the Talacasto Formation and a closely related species from western Bolivia (Talacastops sp.nov. A). The diagnosis of Parabouleia is broadened to include P. eldredgei sp.nov., from Lochkovian strata in the lower part of the Talacasto Formation. Calmoniids from below the Scaphiocoelia Assemblage Zone display morphological disparity that rivals later occurrences, and do not conform to a model of gradual transformation of an acastomorph ancestor. Stratigraphic range extensions based on correction for ghost lineages imply a high diversity within Calmoniidae very early in the Devonian.

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