scholarly journals Stauromatidium and Stauromatidiidae, new genus and family of Upper Silurian and Lower Devonian rugose corals

1982 ◽  
Author(s):  
A E H Pedder ◽  
W A Oliver
Keyword(s):  
Lower Devonian ◽  
New Genus ◽  
Rugose Corals ◽  
Upper Silurian

Lower Devonian (Emsian) rugosa of the Izarne Formation, Montagne Noire, France

1998 ◽  
Vol 72 (6) ◽  
pp. 967-991 ◽  
Author(s):  
Alan E. H. Pedder ◽  
Raimund Feist
Keyword(s):  
New Species ◽  
Lower Devonian ◽  
New Genus ◽  
New Genus And Species ◽  
Coral Fauna ◽  
The North ◽  
Lower Member ◽  
Rugose Corals ◽  
Montagne Noire ◽  
Middle Member

An account of the systematics, biostratigraphy, ecological setting and the biogeographic implications of rugose corals from olistoliths of the Cabrières area is given. Corals of the lower member of the Izarne Formation are dated by conodonts as gronbergi Zone age, and include Lythophyllum sp. indet., Calceola sandalina (Linné), Tryplasma sp. A, Breviphrentis roharti Pedder new species, B. exigua Pedder new species, and Aqishaphyllum sp. A. Corals from the middle member of the formation include Frechocystis pertinax Pedder new genus and species, Calceola sp. undet., Rhizophyllum sp. aff. R. ukalundense Hill and Jell, Tryplasma enorme Pedder new species, Tryplasma sp. A, Breviphrentis sp. A, Platysmatophyllum halleri Pedder new genus and species, Pseudochonophyllum sentum Pedder new species, and Izarneophyllum barroisi (Frech) new genus. No age significant conodont has been recovered from the middle member. However, scutelluid trilobites, which, together with other trilobites, evidently used the underside of Izarne corals for shelter during molting, provide correlation with conodont sequences in the nappe domain to the north and southwest of Cabrières. From this line of evidence, the middle Izarne coral fauna is deduced to be nothoperbonus Zone age. The association of a variety of benthic trilobites, all with large eyes, provides evidence of a photic zone environment for the middle Izarne corals.Rugose corals from the Izarne Formation belong to the Old World Realm and have nothing in common with similar age Rugosa of the Eastern Americas Realm. This implies that the dissolution of the boundary between these realms, which occurred in the Middle Devonian, did not begin before latest Emsian time.

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
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