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Features of the fossil record of evolution

100%

Dzik J.

Acta Palaeontologica Polonica

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1991

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tom 36

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nr 2

Neither allopatric speciations nor extinctions of lineages are directly observable in the fossil record. This significantly reduces the value of inferred durations of taxa as a basis for studies on patterns of evolution. The ranges of taxa detected in rock strata are inevitably shorter than the real durations of lineages. Rates of evolution estimated by counting reported ranges of taxa therefore appear higher than they really were. Biometric studies of gradually evolving lineages indicate that the durations of ‘species’ (morphologies) were actually many times longer. Therefore, the ancestor-descendant relationships along monospecific lineages remain the most important subjects of study in evolutionary paleontology. A way, in which an ancestor-descendant hypothesis can be falsified, is presented.

2

Adam Urbanek (1928-2014)

100%

Kozlowska A., Zalasiewicz J.

Acta Palaeontologica Polonica

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2014

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tom 59

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nr 3

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Skeletogenesis of newly settled planulae of the hermatypic coral Porites lutea

100%

Jell J. S.

Acta Palaeontologica Polonica

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1980

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tom 25

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nr 3-4

The early development of the exoskeleton of the hermatypic scleractinian coral Porites lutea has been established by scanning electron microscopy for 1 hour to 21 day old corallites. The initial deposits are dispersed small grain-like crystallites of calcium carbonate up to 6 µm in length and 0.5 to 3 µm in maximum width. These crystallites enlarge by syntaxial growth and in addition new ones may be nucleated on their surfaces to produce rosette-like aggregations. After 6 hours these aggregates fuse laterally to form the primary layer of the basal plate. At this stage the initial tufts of crystallites of the septal trabeculae are deposited in radial rows on the primary layer of the basal plate. In 24 hour old corallites the trabeculae are well developed and traces of 1, 2 or 3 orders of septa can be recognized. Subsequently (1-7 days), the trabeculae coalesce generating the radially arranged, septa and the secondary layer of the basal plate is deposited in the interseptal areas. With further growth some trabeculae diverge laterally from the median plane of the septum to produce vepreculae which may fuse with those of adjacent septa to form synapticulae. After several orders of septa have been established, the basal plate may develop a peripheral epitheca.

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Comodon Kretzoi and Kretzoi, 2000 replaces Phascolodon Simpson, 1925 [Mammalia], not Phascolodon Stein, 1859

100%

Cifelli R. L.

Acta Palaeontologica Polonica

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2002

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tom 47

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nr 1

5

Additional evidence for the drilling behavior of Paleozoic gastropods

100%

Gahn F. J., Fabian A., Baumiller T. K.

Acta Palaeontologica Polonica

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2003

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tom 48

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nr 1

Although the record of Paleozoic drillholes is long and extensive, evidence pertaining to the identity of the drillers is sparse. The most conclusive evidence, a driller “caught in the act”, has been documented only once (Baumiller 1990). In that example, a drillhole in the calyx of a crinoid was found directly beneath an attached platyceratid gastropod. Additional evidence for drilling by platyceratids has been circumstantial, i.e., based on the association of platyceratids with certain blastoids and crinoids, and the presence of drillholes in other crinoid and blastoid taxa. To a skeptic, the lack of congruence between drilled and platyceratidinfested crinoids and blastoids is not sufficient evidence that platyceratids were the drillers. More conclusive evidence requires examples of drillholes in taxa that are known to have been platyceratid−infested, preferably from localities where both infested specimens and drilled specimens co−occur.

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Adrian Kin (1979–2012)

88%

Jagt-Yazykova E. A.

Acta Palaeontologica Polonica

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2012

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tom 57

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nr 4

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Formations recifales du Devonien des Monts de Sainte-Croix (Pologne)

88%

Pajchlowa M., Stasinska A.

Acta Palaeontologica Polonica

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1965

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tom 10

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nr 2

Sont présentés les résultats des observations sur les formations récifales dans le Frasnien et le Givétien des Monts de Sainte-Croix (Góry Świętokrzyskie), dans les localités Kadzielnia, Sitkówka et Jurkowice. A Kadzielnia ce sont les biohermes et à Sitkówka et Jurkowice - les biostromes.

8

88%

Borsuk-Białynicka M., Jakubowski G., Lefeld J.

Acta Palaeontologica Polonica

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2019

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tom 64

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nr 4

12

88%

Fedorowski J.

Acta Palaeontologica Polonica

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1974

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tom 19

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nr 4

18

A probable stegosaurian track from the Late Jurassic of Poland

88%

Gierlinski G., Sabath K.

Acta Palaeontologica Polonica

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2002

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tom 47

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nr 3

Elusive tracks of stegosaurs have been long searched for by ichnologists, and various purported stegosaur imprints have recently been reported. A fragmentary trackway of a large, quadrupedal ornithischian dinosaur was found on an isolated slab of Oxfordian dolomite, on the northeastern slope of Holy Cross Mountains, Poland. The track is similar to large, blunt−toed Late Jurassic ichnites from North America. The footprints show a distinctive morphology, which fits the stegosaurian foot. The newly described ichnites from the Upper Jurassic of Poland provide the second ichnological evidence of the Late Jurassic dinosaurs in this country; numerous rich dinosaur footprint assemblages were previously known only from the Lower Jurassic outcrops.

19

Candle wax shells, morphodynamics, and the Cambrian explosion

88%

Seilacher A.

Acta Palaeontologica Polonica

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1993

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tom 38

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nr 3-4

20

Biotic responses to the Late Devonian global events: Introductory remarks

88%

Balinski A., Olempska E., Racki G.

Acta Palaeontologica Polonica

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2002

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tom 47

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nr 2

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