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Showing results for tags 'pragian'.
Found 6 results
Adam's Early / Lower Devonian
Tidgy's Dad posted a topic in Member CollectionsThe Devonian period is known as "The Age of Fish", but could also be known as "The Age of Brachiopods." In the Early / Lower Devonian, brachiopods reached the height of their diversity towards its end in the Emsian. We see the ancestral groups occurring, lingulids, craniids, orthids, protorthids, pentamerids, rhynchonellids and strophomenids, as well as the later successful groups we have seen before such as atrypids, athyrids and orthotetids, plus the rise of spiriferids, spiriferinids and productids and the beginning of the terebratulids. By the end of the Devonian , several of these g
oilshale posted a fossil in PlantsProbably Gosslingia breconensis Heard 1927. Taxonomy from Fossilworks.org. Edwards 1970, p. 226: “In his preliminary report in 1925, Heard had called the plant Psilophyton, but he renamed it Gosslingia when he presented an account of its anatomy and morphology in 1927.” Emended diagnosis for the genus (Edwards 1970, p. 237): "Plant rootless and leafless. Gregarious erect axes cylindrical, dichotomously and pseudomonopodially branched, arising from dichotomously branched rhizomes with rhizoids. Stems circinately coiled in apical regions: surfaces of some axes with protuberances;
Lower Devonian plant
paleoflor posted a topic in Fossil IDL.S., Hope someone on TFF can help me with the identification of a plant fragment from the Lower Devonian (Pragian) of the Belgian Ardennes. The specimen in question consists of a 17 mm-long, 12 mm-wide oval-shaped body, which is seemingly covered in equant scales (though this could also be an artefact of the surface preservation) and has curved spine-like protrusions (see right hand-side of specimen in first two photographs). The detailed structure of the specimen is quite difficult to capture, so I added four photographs taken under different lighting conditions. Hope this is eno
Victoraspis longicornualis Carlsson & Blom, 2008
oilshale posted a fossil in FishesTaxonomy according to Carlsson et Blom, 2008. Voichyshyn, 2011 p. 157:” Diagnosis (based on data of Carlsson and Blom 2008). — Medium sized scolenaspidians (L is about 65 mm). The width of the shield considerably exceeds its length (L/S about 0.5). The prepineal part of the shield is somewhat shorter than the postpineal one (B/C 0.8). Anterior margin of the shield somewhat narrows and has poorly expressed obtuse rostral corner. The cornual processes are very long, narrow, and bent caudally. The abdominal division of the shield is narrow and probably narrows backwards. The hypophyseal divi
Rhinopteraspis dunensis Roemer, 1855 - a pteraspidid heterostracan agnathan
oilshale posted a gallery image in Members Gallery
From the album: VertebratesRhinopteraspis dunensis Roemer, 1855 Early Devonian Upper Pragian Odenspiel North Rhine-Westphalia Germany Length 10cm / 4"
Odd ichno ?
Rockwood posted a topic in Fossil IDThese seem to be traces, but have an odd assortment of characteristics. Found in lake shore glacial float. Most likely Tarratine sandstone,a Pragian marine delta related formation. Any thoughts ?