Wyniki wyszukiwania

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Unassisted and assisted ion transport across membranes: insights from computer simulations

100%

Pohorille A., Wilson M. A.

Cellular and Molecular Biology Letters

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2001

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tom 06

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nr 2A

369-374

2

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Crinoids from the Silurian of Western Estonia

81%

Ausich W. I., Wilson M. A., Vinn O.

Acta Palaeontologica Polonica

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2012

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tom 57

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nr 3

The Silurian crinoids of Estonia are re−evaluated based on new collections and museum holdings. Nineteen species−level crinoid taxa are now recognized. All crinoid names applied to Estonian Silurian crinoids during the middle 19th century are disregarded. Especially significant is the fauna reported herein from the Pridoli because coeval crinoids are very poorly known from the Baltic region and elsewhere. One new genus and four new species are described from Estonia, namely Calceocrinus balticensis sp. nov., Desmidocrinus laevigatus sp. nov., Eucalyptocrinites tumidus sp. nov., and Saaremaacrinus estoniensis gen. et sp. nov.

3

A new microconchid tubeworm from the Artinskian (Lower Permian) of central Texas, USA

81%

Wilson M. A., Vinn O., Yancer T. E.

Acta Palaeontologica Polonica

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2011

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tom 56

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nr 4

Calcareous tubeworms are common in the Artinskian (Lower Permian) shale and limestone rocks of the Wichita−Albany Group in central Texas. In some units they form small reefs of budding tubes spreading outward from a common origin. These tubular fossils have been traditionally referred to as serpulids, but here we identify them as microconchids (Helicoconchus elongatus gen. et sp. nov.) These microconchids are unusual because of their greatly elongated impunctate tubes with centrally pitted diaphragms. They also show two types of budding: lateral with small daughter tubes that begin as small coils, and binary fission that produced two daughter tubes of equal diameters. These microconchids flourished in shallow marine environments with a fauna dominated by mollusks, echinoids, and foraminifera.

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Jurassic rhynchonellide brachiopods from the Jordan Valley

81%

Feldman H. R., Schemm-Gregory M., Ahmad F., Wilson M. A.

Acta Palaeontologica Polonica

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2012

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tom 57

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nr 1

Jurassic rhynchonellide brachiopods from the Jordan Valley are herein revised and new taxa are added to the faunal list. In this study of Jurassic rhynchonellides from Wadi Zarqa, northwestern Jordan, we recognize the following taxa: Eurysites rotundus, Cymatorhynchia quadriplicata, Daghanirhynchia triangulata, D. angulocostata, Pycnoria magna, Schizoria elongata, and Schizoria cf. intermedia. The following new taxa are described: Daghanirhynchia susanae sp. nov. and Amydroptychus markowitzi sp. nov. The Middle Jurassic Mughanniyya Formation of northwest Jordan is dominated by limestone beds. The sedimentary environment is interpreted as neritic, light, and nutrient−rich resulting in high faunal diversity. The high rhynchonellide endemism of this fauna is yet another confirmation of pronounced Middle Jurassic endemism along the southern Tethyan margin of the Ethiopian Province. Brachiopods of the Jordanian Mughanniyya Formation can be correlated with the fauna of the Aroussiah Formation in Sinai and the Zohar and Matmor formations in Southern Israel.

Ograniczanie wyników

3 Acta Palaeontologica Polonica

1 Cellular and Molecular Biology Letters

4 Wilson M. A.

2 Vinn O.

1 Ahmad F.

1 Ausich W. I.

1 Feldman H. R.

1 Pohorille A.

1 Schemm-Gregory M.

1 Yancer T. E.

2 2012

1 2011

1 2001

Unassisted and assisted ion transport across membranes: insights from computer simulations

Crinoids from the Silurian of Western Estonia

A new microconchid tubeworm from the Artinskian (Lower Permian) of central Texas, USA

Jurassic rhynchonellide brachiopods from the Jordan Valley