Wyniki wyszukiwania - BazTech

1

Some genera and species of dissepimented solitary Rugosa (Anthozoa) from the Pennsylvanian (Carboniferous) and Cisuralian (Permian) of North America. Part 2. Dibunophylloides Fomichev, 1953

Fedorowski Jerzy, Chwieduk Edward

Acta Geologica Polonica

|

2025

|

Vol. 75, no. 3

art. no. e53

EN

Species that earlier authors included in Dibunophyllum Thomson and Nicholson, 1876 are re-identified here as belonging to Dibunophylloides Fomichev, 1953 and specimens from the Missourian (Pennsylvanian) deposits of the Glass Mountains (SW Texas, USA) are described. Species described previously in adequate detail and specimens from our collection display great morphological diversity. This and the lack of data on intraspecific variability for most species described so far resulted in the introduction here of six new species (Dibunophylloides differentialis, D. parcus, D. colligatus, D. similis, D. infirmis and D. complexus). An additional species is identified as Dibunophylloides cf. valeriae (Newell, 1935) and four species are left in open nomenclature. Stressful extrinsic conditions, documented by common rejuvenations and possibly variegated micro-environmental niches on the one hand and close relationships of specimens on the other hand are suggested as responsible for the large morphological variability and repetitions of some skeletal features across species. Dibunophylloides supplements a group of genera suggested by Fedorowski (2023) as having originated in the Paleotethyan superprovince before migrating to the North American superprovince. Paleobiogeography, including that based on rugose corals) provides an important tool for tectonic and paleoenvironmental reconstructions. However, coral taxonomy may be hampered by the great variability displayed by many taxa.

2

Some genera and species of dissepimented solitary Rugosa (Anthozoa) from the Pennsylvanian (Carboniferous) and Cisuralian (Permian) of North America. Part 1. Yuanophylloides Fomichev, 1953

Fedorowski Jerzy, Chwieduk Edward

Acta Geologica Polonica

|

2024

|

Vol. 74, no. 3

art. no. e16

EN

Several specimens derived from the Missourian (Pennsylvanian) deposits of the Glass Mountains (SW Texas, USA) are identified as Yuanophylloides Fomichev, 1953. Some species that earlier authors included in the genera Campophyllum Milne-Edwards and Haime, 1852, Bothrophyllum Trautschold, 1879, and Neokoninckophyllum Fomichev, 1939 are re-identified as belonging to Yuanophylloides. In addition to the type genus, a new subgenus Patulaxis of Yuanophylloides with the type species Y. (P.) molestus sp. nov. and the new species Y. (P.) parcus and Y. (P.) laxus are introduced. Re-identification of the upper Serpukhovian Campophyllum kansasense Miller and Gurley, 1893 as Yuanophylloides renders untenable the origin of that genus in the Donets Basin. The circum-Laurussia warm current is suggested as having carried Yuanophylloides larvae from the North American superprovince to the Paleotethyan superprovince. This genus supplements the group of genera suggested by Fedorowski (2023) as having originated in the North American superprovince and migrating to the Paleotethyan superprovince. Together, these genera demonstrate the importance of taxonomic investigation to establish paleobiogeography as a constrain on global (i.e., tectonic scale) environmental reconstructions.

3

Muzeum Ziemi UAM : od kolekcjonerstwa do nowoczesnej dydaktyki

Chwieduk Edward

Przegląd Geologiczny

|

2022

|

Vol. 70, nr 8

591--597

EN

Scientific and educational potential of the academic Earth Museum at Adam Mickiewicz University in Poznań, Poland is analysed along with its activities related to modern approaches to museums. The social context of the traditional, place-based museology is modified by 1) the dominance of science-centred role of the educational institutions and 2) the view of the museum as an educational product. The first assumption leads to the dependence on an ongoing volunteer support, while the second requires a substantial managerial effort to accomodate the support of the community. This opens up a new perspective in which the museum becomes a venue for innovative means of scientific communication in which the scientific knowledge is disseminated through the myriad of educational projects at the local and regional scale, contributing to the development of the whole community.

4

Lower Carboniferous solitary rugose corals from the Flett Formation of the Liard Basin, northwestern Canada vs. European and Asian Rugosa of the same geological age

Chwieduk Edward

Acta Geologica Polonica

|

2022

|

Vol. 72, no. 1

33--88

EN

The paper focuses on the taxonomic description of the lower Carboniferous (uppermost Tournaisian to middle Viséan) solitary rugose corals from bedded limestone and shale units in the Flett Formation in the Jackfish Gap (eastern Liard Range), northwestern Canada. The corals described herein include 12 species representing the genera Ankhelasma Sando, 1961, Bradyphyllum Grabau, 1928, Caninophyllum Lewis, 1929, Cyathaxonia Michelin, 1847, Ekvasophyllum Parks, 1951, EnniskilleniaKabakovich in Soshkina et al., 1962, Vesiculophyllum Easton, 1944 and Zaphrentites Hudson, 1941. Two of these species are new (Ankhelasma canadense sp. nov. and Ekvasophyllum variabilis sp. nov.) and 6 taxa are described in open nomenclature. The distribution and relative abundance of solitary Rugosa in Europe and the Liard Basin confirm the geographical proximity of those areas and the open marine communication between them during the early Carboniferous. It therefore represents an important contribution to the determination of the time of isolation of the western Laurussia shelf fauna from that of southeastern Laurussia, as well as the time of the possible emergence of species from southeastern Laurussia into the western Laurussia seas. Of particular importance here are cosmopolitan taxa and the timing of their disappearance from the fossil record.

5

Polish palaeontological research in the Arctic

Chwieduk Edward

Geologos

|

2009

|

Vol. 15, No. 2

133--143

6

Early Permian solitary rugose corals from Kruseryggen (Treskelodden Fm., Hornsund area, southern Spitsbergen)

Chwieduk Edward

Geologos

|

2009

|

Vol. 15, No. 1

57--75

EN

A collection of solitary rugose corals collected from the Treskelodden Formation of the Kruseryggen Hill, Hornsund area, south Spitsbergen, consists of 30 specimens representing the Bothrophyllidae family with the genera Bothrophyllum, Caninophyllum, Hornsundia, and Timania (5 species), and an indeterminate family with the genus Svalbardphyllum (one species). These large, dissepimental forms, dating from the Early Sakmarian (Tastubian), indicate a warm-water environment. The lithology, the thickness of the succession, the reddish hue and the abrasion of the fossils indicate that the area of the inner Hornsund showed a relief that enabled considerable erosion of the elevated areas and redeposition of the fossils at remote locations. The changing morphology of this area during the Early Permian was probably influenced by synsedimentary block tectonics.