Zobrazeno 1 - 10
of 11
pro vyhledávání: '"Virgella"'
Autor:
Juozas Paškevičius
Publikováno v:
Geologija. Geografija. 3
A new genus of graptolites named Lithuanograptus has been found in Lithuania and studied by the present author (Paskevicius, 1972, 1976) in the Silurian Llandovery cyphus zone of the Rasytė Formation and the following 4 species have been described:
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::1a03d112f76506122048e9ae02f60101
https://doi.org/10.6001/geol-geogr.v3i2.3540
https://doi.org/10.6001/geol-geogr.v3i2.3540
Publikováno v:
Proceedings of the Yorkshire Geological Society. 58:211-222
SUMMARY A number of graptolites with thickened periderm, both dendroids and graptoloids, have been examined with the SEM. The thickening is by the deposition of layers of ectocortical tissue, clearly as bandages in the graptoloids. In Colonograptus c
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::a2dab6c2d3db8925e353148eb9f76daa
https://doi.org/10.1144/pygs.58.4.285
https://doi.org/10.1144/pygs.58.4.285
Autor:
Jörg Maletz
Publikováno v:
Palaeontology. 53:415-439
The virgellar spine is one of the most consistent features of the graptolite sicula. It is present in a large number of graptoloid groups, but evolved separately and independently in these as it is seen from the presence of the spine in either ventra
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::c865ecf06bfc9c3cbd380d27f14aafa9
https://doi.org/10.1111/j.1475-4983.2010.00940.x
https://doi.org/10.1111/j.1475-4983.2010.00940.x
Autor:
Jörg Maletz, David K. Loydell
Publikováno v:
Palaeontology. 52:273-296
Isolated material of 13 graptolite species from the Aeronian (middle Llandovery) Lituigraptus convolutus Biozone is described. A considerable amount of late astogenetic peridermal thickening is revealed in Normalograptus scalaris and Rivagraptus bell
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::36284c29df9275fc5424dc039854a279
https://doi.org/10.1111/j.1475-4983.2008.00843.x
https://doi.org/10.1111/j.1475-4983.2008.00843.x
Autor:
Denis E. B. Bates, Anna Kozłowska
Publikováno v:
Acta Palaeontologica Polonica. 53:105-112
The new retiolitid graptolite Kirkigraptus inexpectans gen. et sp. nov., from the Neodiversograptus nilssoni Biozone of the Bartoszyce borehole, Poland is described. It is unique among the retiolitids not having a preserved virgella or ancora. Instea
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::8b20878182d728b816df54f36cb09124
https://doi.org/10.4202/app.2008.0107
https://doi.org/10.4202/app.2008.0107
Autor:
Lorna C. Clarke, S. Henry Williams
Publikováno v:
Palaeontology. 42:1003-1015
Studies on graptolite taxonomy and phylogeny in recent years have placed great emphasis on the proximal development of the rhabdosome, particularly the presence or absence of a virgella and early thecal growth patterns. As the prosicula was the earli
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::1a6705be3d49c939e318c4e03d968b0f
https://doi.org/10.1111/1475-4983.00107
https://doi.org/10.1111/1475-4983.00107
Autor:
Sherrill J. H. Senior
Publikováno v:
Canadian Journal of Earth Sciences. 28:822-826
A recently discovered graptoloid, Dicellograptus uncatus n.sp., is described from the Blue Mountain Formation of southern Ontario, Canada. This species is characterized by an axial angle of 120–180° and a prominent, hook-shaped virgella. Dicellogr
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::75e28c045f870446c8776e64236682f5
https://doi.org/10.1139/e91-071
https://doi.org/10.1139/e91-071
Publikováno v:
Descriptions of Fungi and Bacteria. 148
A description is provided for Virgella robusta . Information is included on the disease caused by the organism, its transmission, geographical distribution, and hosts. DISEASE: DARKER (1932) wrote that the parasitism of this fungus 'has never been pr
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::51818e66108afdc592e1663b8f8d01a5
https://doi.org/10.1079/dfb/20056401480
https://doi.org/10.1079/dfb/20056401480
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Autor:
R. B. Rickards, T. N. Koren
Publikováno v:
Geological Magazine. 111:193-204
SummaryOrthograptus obuti sp.nov. and Orthograptus insectiformis Nicholson are shown to exhibit a complex proximal meshwork developed from a much-divided virgella which closely resembles retiolitid clathrial and lacinial networks. The virgellar meshw
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::1c5753784fcdb73b5576c781f3600602
https://doi.org/10.1017/s0016756800038437
https://doi.org/10.1017/s0016756800038437