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First report of a Pliocene pike (Esocidae: Esox) in Transylvania, Romania

100%

Codrea V. A. , Trif N. , Toth L.

Geological Quarterly

2018

tom Vol. 62, No. 3

644--652

Pliocene fish species based on skeleton remains and associated teeth ever reported from the inner Carpathian area in Romania in the Braşov Basin (Baraolt sub-basin), which refers to a pike (Esox sp.). The fish fossils illustrating a large-sized specimen originate from the South Racoş coal open pit (Racoşu de Sus, Covasna County), in the so-called “Formation with Limnocardium” (Dacian, Lower Pliocene). Comparisons with osteological material of recent pikes originating from various localities in Romania are presented. The associated mollusc fauna known from the formation that yielded the pike remains suggests the presence of a lake with a stratified water column in the Baraolt sub-basin.

Gadiform remains from the La Meseta Formation (Eocene) of Seymour Island, West Antarctica

86%

Jerzmańska A. , Świdnicki J. , Jerzmańska A. , Świdnicki J.

Hydrodynamic performance of psammosteids: New insights from computational fluid dynamics simulations

72%

Dec M.

Acta Palaeontologica Polonica

2019

tom 64

nr 4

The shape of dermal armor protecting the body in the Paleozoic agnathans such as the Heterostaci has an important hydrodynamic role in providing lift or drag force generation. Here, by performing computational fluid dynamics simulations (CFD), the measurements of hydrodynamic lift/ drag force and lift or drag coefficients were taken for two psammosteids Guerichosteus and Tartuosteus with reference to the pteraspid Errivaspis. This study shows the substantially higher values of the lift coefficient and lift-to-drag ratio for the psammosteids Guerichosteus and Tartuosteus compared with Errivaspis. The tendencies in the evolution of dermal exoskeleton, especially the widening of the branchial plates of psammosteids was directed towards the increased generation of lift force to provide efficient cruising.

Anna Jerzmanska [1928-2003]

72%

Elzanowski A.

Acta Palaeontologica Polonica

2003

tom 48

nr 1

Mississippian chondrichthyan fishes from the area of Krzeszowice, southern Poland

58%

Ginter M. , Zlotnik M.

Acta Palaeontologica Polonica

2019

tom 64

nr 3

Two new assemblages of Mississippian pelagic chondrichthyan microremains were recovered from the pelagic limestone of the area of Krzeszowice, NW of Kraków, Poland. The older assemblage represents the upper Tournaisian of Czatkowice Quarry and the younger one the upper Viséan of the Czernka stream valley at Czerna. The teeth of symmoriiform Falcatidae are the major component of both collections. A comparison of the taxonomic composition of the assemblage from Czerna (with the falcatids and Thrinacodus as the major components) to the previously published materials from the Holy Cross Mountains (Poland), Muhua (southern China), and Grand Canyon (Northern Arizona, USA) revealed the closest similarity to the first of these, probably deposited in a deeper water environment, relatively far from submarine carbonate platforms. A short review of Mississippian falcatids shows that the late Viséan–Serpukhovian period was the time of the greatest diversity of this group.