Wyniki wyszukiwania

1

Artykuł dostępny w postaci pełnego tekstu - kliknij by otworzyć plik

Major aspects of evolution on the graptolites

100%

Rickards R. B.

Acta Palaeontologica Polonica

|

1978

|

tom 23

|

nr 4

The sequences of graptolite faunas, originations and extinctions, origin of new morphological types, and palaebiogeographical provinces are aspects of graptolite evolution which may be interpreted in terms of their essential coloniality, their change from benthos to plankton, inbreeding and outbreeding, genetic polymorphism and in terms of anagenetic and cladogenetic grades. Within this framework several topics are discussed which have been variously favoured over the years by neontologists and palaeontologists alike, to whit: neotony, paedomorphosis and recapitulation; adaptiveness and preadaptation; phyletic gradualism and punctuated equilibria; mosaic evolution, convergence and parallelism; orthogenesis, programme evolution and the theory of trends; penetrance and expressivity biocharacters; and Cope's Rule. Some of these are rejected as untenable in a modern context and the others are considered against the evolutionary patterns peculiar to graptolites, and their major adaptive trends through time.

2

Response of Paramecium primaurelia on the air pollution

100%

Komala Z.

Folia Biologica

|

1993

|

tom 41

|

nr 1-2

3

The Paramecium aurelia species complex of Poland

100%

Przybos E., Komala Z.

Folia Biologica

|

1993

|

tom 41

|

nr 1-2

4

Pliocene bats of the genus Myotis [Mammalia: Chiroptera] from Podlesice [Poland] and Osztramos 9 and 13 [Hungary]

100%

Godawa J.

Acta Zoologica Cracoviensia

|

1993

|

tom 36

|

nr 2

5

Karyotypes of Psylloidea [Homoptera]. III. Chromosomal numbers of eight species belonging to the families Aphalaridae, Psyllidae, Homotomidae and Triozidae

100%

Maryanska-Nadachowska A., Glowacka E., Warchalowska-Sliwa E.

Folia Biologica

|

1993

|

tom 41

|

nr 1-2

6

Enigmatic morphological disparity in tarsometatarsi of giant penguins from the Eocene of Antarctica

80%

Acosta Hospitaleche C., Jadwiszczak P.

Polish Polar Research

|

2011

|

tom 32

|

nr 2

7

Like phoenix from the ashes: How modern baleen whales arose from a fossil “dark age”

80%

Marx F. G., Fitzgerald E. M. G., Fordyce R. E.

Acta Palaeontologica Polonica

|

2019

|

tom 64

|

nr 2

The evolution of baleen whales (Mysticeti), the largest animals on Earth, was punctuated by a pivotal turnover event. Following their emergence around 36 million years (Ma), mysticetes diversified into a disparate range of toothed and toothless species until 23 Ma, but then nearly vanished from the global fossil record for the next five million years. Following this early Miocene “dark age”, toothless mysticetes spectacularly reappeared around 18–17 Ma, whereas toothed mysticetes had gone entirely extinct. Here, we suggest that this turnover event reflects a change in mysticete habitat occupancy. Using the well-sampled record of Australasia as a case study, we show that Oligocene pre-“dark age” mysticetes formed distinct coastal and offshore assemblages, dominated by small (2–4 m), ecologically disparate toothed species, and larger (5–6 m) toothless filter feeders, respectively. Environmental change around the Oligocene–Miocene boundary led to the decline of the endemic coastal assemblages, leaving nearshore deposits virtually devoid of mysticetes. Filter feeders persisted offshore and subsequently re-invaded coastal habitats during the mid-Miocene Climatic Optimum, thus establishing the modern, cosmopolitan mysticete fauna.

8

A re-evaluation of the enigmatic dinosauriform Caseosaurus crosbyensis from the Late Triassic of Texas, USA and its implications for early dinosaur evolution

80%

Baron M. G., Williams M. E.

Acta Palaeontologica Polonica

|

2018

|

tom 63

|

nr 1

The holotype specimen of the Late Triassic dinosauriform Caseosaurus crosbyensis is redescribed and evaluated phylogenetically for the first time, providing new anatomical information and data on the earliest dinosaurs and their evolution within the dinosauromorph lineage. Historically, Caseosaurus crosbyensis has been considered to represent an early saurischian dinosaur, and often a herrerasaur. More recent work on Triassic dinosaurs has cast doubt over its supposed dinosaurian affinities and uncertainty about particular features in the holotype and only known specimen has led to the species being regarded as a dinosauriform of indeterminate position. Here, we present a new diagnosis for Caseosaurus crosbyensis and refer additional material to the taxon—a partial right ilium from Snyder Quarry. Our comparisons and phylogenetic analyses suggest that Caseosaurus crosbyensis belongs in a clade with herrerasaurs and that this clade is the sister taxon of Dinosauria, rather than positioned within it. This result, along with other recent analyses of early dinosaurs, pulls apart what remains of the “traditional” group of dinosaurs collectively termed saurischians into a polyphyletic assemblage and implies that Dinosauria should be regarded as composed exclusively of Ornithoscelida (Ornithischia + Theropoda) and Sauropodomorpha. In addition, our analysis recovers the enigmatic European taxon Saltopus elginensis among herrerasaurs for the first time. This result suggests a greater body-size range for herrerasaurs than previously thought and provides further evidence for their presence in Europe during the Late Triassic. If this hypothesis is correct then this clade of herrerasaurs also represents the first clade of non-dinosaurian dinosauromorphs known to contain large-bodied carnivorous species. The results of our analyses also highlight the distinction between the clades Herrerasauridae and Herrerasauria, as they are currently defined, and necessitate a provisional revival of the latter until future works can better resolve the relationships among these important early taxa.

9

Variability of conch morphology in a cephalopod species from the Cambrian to Ordovician transition strata of Siberia

80%

Dzik J.

Acta Palaeontologica Polonica

|

2020

|

tom 65

|

nr 1

10

Morphological homology, evolution, and proposed nomenclature for bear dentition

80%

Jiangzuo Q., Liu J., Chen J.

Acta Palaeontologica Polonica

|

2019

|

tom 64

|

nr 4

Bears are a group of carnivores with diverse diets and complicated dental structure. Several large rearrangements of dental structures are known in different lineages of bears, making the homology of dental structures between the different bears difficult to evaluate. By tracing the evolutionary processes of the two lineages of bears with the most complicated dental structure, i.e., the giant panda lineage (Ailuropodinae) and cave bear lineage (Ursinae), we were able to clarify the homology of dental structures of the two subfamilies. We define a new assemblage of dental nomenclature (based mainly on the homology to the giant panda) that can be very useful to infer the evolution of fossil bears. The evolutionary positions of some fossil bears are reviewed based on our results.

11

A new dolphin from the early Miocene of Patagonia, Argentina: Insights into the evolution of Platanistoidea in the Southern Hemisphere

80%

Viglino M., Buono M. R., Gutstein C. S., Cozzuol M. A., Cuitino J. I.

Acta Palaeontologica Polonica

|

2018

|

tom 63

|

nr 2

The contents of the superfamily Platanistoidea, an early-diverging lineage comprising extinct species and a single extant representative of South Asian river dolphin (Platanista gangetica), remain controversial. We describe here a partial skull and associated tympano-periotic bones identified as a new genus and species, Aondelphis talen gen. et sp. nov., collected in the lower levels of the Gaiman Formation (early Miocene), in Patagonia (Chubut Province, Argentina). Aondelphis is the first Patagonian platanistoid species named in almost a century. Phylogenetic analyses suggest Aondelphis talen gen. et sp. nov. and a taxon from New Zealand (cf. Papahu ZMT-73) are basal Platanistoidea sensu lato. Unambiguous synapomorphies related to the ear bones allowed us to determine its phylogenetic position. Aondelphis talen markedly differs from the other well-known early Miocene Patagonian platanistoid Notocetus, suggesting the coexistence of at least two different morphotypes that may have occupied different ecological niches at that time. The putative close relationship with a species from New Zealand indicates there was a rapid diversification and widespread distribution of the group in the Southern Hemisphere during the early Miocene. The description of new species and revision of historical records of Patagonian platanistoids can help shedding light on cetacean assemblages of the Patagonian sea during this epoch.

12

The sauropodomorph biostratigraphy of the Elliot Formation of southern Africa: Tracking the evolution of Sauropodomorpha across the Triassic–Jurassic boundary

80%

Acta Palaeontologica Polonica

|

2017

|

tom 62

|

nr 3

The latest Triassic is notable for coinciding with the dramatic decline of many previously dominant groups, followed by the rapid radiation of Dinosauria in the Early Jurassic. Among the most common terrestrial vertebrates from this time, sauropodomorph dinosaurs provide an important insight into the changing dynamics of the biota across the Triassic–Jurassic boundary. The Elliot Formation of South Africa and Lesotho preserves the richest assemblage of sauropodomorphs known from this age, and is a key index assemblage for biostratigraphic correlations with other similarly- aged global terrestrial deposits. Past assessments of Elliot Formation biostratigraphy were hampered by an overly simplistic biozonation scheme which divided it into a lower “Euskelosaurus” Range Zone and an upper Massospondylus Range Zone. Here we revise the zonation of the Elliot Formation by: (i) synthesizing the last three decades’ worth of fossil discoveries, taxonomic revision, and lithostratigraphic investigation; and (ii) systematically reappraising the stratigraphic provenance of important fossil locations. We then use our revised stratigraphic information in conjunction with phylogenetic character data to assess morphological disparity between Late Triassic and Early Jurassic sauropodomorph taxa. Our results demonstrate that the Early Jurassic upper Elliot Formation is considerably more taxonomically and morphologically diverse than previously thought. In contrast, the sauropodomorph fauna of the Late Triassic lower Elliot Formation remains relatively poorly understood due to the pervasive incompleteness of many key specimens, as well as the relative homogeneity of their diagnostic character suites. Our metrics indicate that both Elliot Formation and global sauropodomorph assemblages had greater morphological disparity within the Early Jurassic than the Late Triassic. This result is discussed in the context of changing palaeoclimatic conditions, as well as macroevolutionary events associated with the end-Triassic extinction.

13

Evolution of postcranial skeleton in worm lizards inferred from its status in the Cretaceous stem-amphisbaenian Slavoia darevskii

80%

Acta Palaeontologica Polonica

|

2017

|

tom 62

|

nr 1

Amphisbaenians are one of the most derived fossorial groups among Squamata. Studies of their evolution were hampered by their specialized limbless morphology and unrecognized early fossil record. This study presents a detailed description of the postcranial anatomy of the oldest known stem-amphisbaenian Slavoia darevskii. The skeleton shows an incipient adaptation to the fossorial mode of life, expressed in the early stages of limb reduction and elongation of the trunk, typical aspects of modern worm lizards. The forelimbs show a hyperphalangy of the first digit. They were probably strengthened this way to support the head in burrowing. Such an anatomy of the most ancient amphisbaenians implies that the forelimbs were lost multiple times in the amphisbaenians to be retained only in the Bipedidae. The hindlimb reduction was initiated early (before the split into modern families) but may have been completed independently. Despite these changes, S. darevskii still had the plesiomorphic 26 presacral vertebrae but the neck region was shorter, as shown by the ribs morphology and position.

14

Morphological and systematic re-assessment of the late Oligocene “Halitherium” bellunense reveals a new crown group genus of Sirenia

80%

Acta Palaeontologica Polonica

|

2017

|

tom 62

|

nr 1

“Halitherium” bellunense is exclusively known from a single individual from upper Oligocene glauconitic sandstone near Belluno, northern Italy. According to a review of its morphological basis, which consists of associated cranial elements, some vertebrae and ribs, this specimen is identified as a juvenile, because the first upper incisor (I1) and supposedly second upper molar (M2) are not fully erupted. However its juvenile status allowed only cautious conclusions on its taxonomy and systematic affinity. The presence of a nasal process of the premaxilla with a broadened and bulbous posterior end, and a lens-shaped I1, corroborate an evolutionarily-derived status of this species that places it well within the sirenian crown group Dugonginae. Considering these new data and in order to avoid continued misuse of the inappropriate generic name of Halitherium, a new generic name, Italosiren gen. nov., and emended species diagnosis are supplied for this taxon.

15

Evolution of Gliridae [Rodentia, Mammalia] in the Pliocene and quaternary of Poland

80%

Daoud A.

Acta Zoologica Cracoviensia

|

1993

|

tom 36

|

nr 2

16

Insectivora [Mammalia] from the Miocene of Belchatow in Poland. I. Metacodontidae: Plesiosorex Pomel, 1854

80%

Rzebik-Kowalska B.

Acta Zoologica Cracoviensia

|

1993

|

tom 36

|

nr 2

17

Gomphotherium angustidens [Cuvier, 1806] [Proboscidea, Mammalia] from the Miocene of Belchatow and the proboscidean datum in Poland

80%

Kowalski K., Kubiak H.

Acta Zoologica Cracoviensia

|

1993

|

tom 36

|

nr 2

18

Neocometes Schaub and Zapfe, 1953 [Rodentia, Mammalia] from the Miocene of Belchatow [Poland]

80%

Kowalski K.

Acta Zoologica Cracoviensia

|

1993

|

tom 36

|

nr 2

19

Catalogue of fossil and subfossil birds of Poland

80%

Bochenski Z.

Acta Zoologica Cracoviensia

|

1993

|

tom 36

|

nr 2

20

Chromosomes of Diestrammena unicolor unicolor Brunner von Wattenwyl, 1888 and Paratachycines [Hemitachycines] boldyrevi [Uvarov, 1926] [Orthoptera, Rhaphidophoridae, Aemodogryllinae]. Karyotypes, C-bands and NORs

80%

Warchalowska-Sliwa E., Maryanska-Nadachowska A., Kostia D.

Folia Biologica

|

1993

|

tom 41

|

nr 3-4

Ograniczanie wyników

Major aspects of evolution on the graptolites

Response of Paramecium primaurelia on the air pollution

The Paramecium aurelia species complex of Poland

Pliocene bats of the genus Myotis [Mammalia: Chiroptera] from Podlesice [Poland] and Osztramos 9 and 13 [Hungary]

Karyotypes of Psylloidea [Homoptera]. III. Chromosomal numbers of eight species belonging to the families Aphalaridae, Psyllidae, Homotomidae and Triozidae

Enigmatic morphological disparity in tarsometatarsi of giant penguins from the Eocene of Antarctica

Like phoenix from the ashes: How modern baleen whales arose from a fossil “dark age”

A re-evaluation of the enigmatic dinosauriform Caseosaurus crosbyensis from the Late Triassic of Texas, USA and its implications for early dinosaur evolution

Variability of conch morphology in a cephalopod species from the Cambrian to Ordovician transition strata of Siberia

Morphological homology, evolution, and proposed nomenclature for bear dentition

A new dolphin from the early Miocene of Patagonia, Argentina: Insights into the evolution of Platanistoidea in the Southern Hemisphere

The sauropodomorph biostratigraphy of the Elliot Formation of southern Africa: Tracking the evolution of Sauropodomorpha across the Triassic–Jurassic boundary

Evolution of postcranial skeleton in worm lizards inferred from its status in the Cretaceous stem-amphisbaenian Slavoia darevskii

Morphological and systematic re-assessment of the late Oligocene “Halitherium” bellunense reveals a new crown group genus of Sirenia

Evolution of Gliridae [Rodentia, Mammalia] in the Pliocene and quaternary of Poland

Insectivora [Mammalia] from the Miocene of Belchatow in Poland. I. Metacodontidae: Plesiosorex Pomel, 1854

Gomphotherium angustidens [Cuvier, 1806] [Proboscidea, Mammalia] from the Miocene of Belchatow and the proboscidean datum in Poland

Neocometes Schaub and Zapfe, 1953 [Rodentia, Mammalia] from the Miocene of Belchatow [Poland]

Catalogue of fossil and subfossil birds of Poland

Chromosomes of Diestrammena unicolor unicolor Brunner von Wattenwyl, 1888 and Paratachycines [Hemitachycines] boldyrevi [Uvarov, 1926] [Orthoptera, Rhaphidophoridae, Aemodogryllinae]. Karyotypes, C-bands and NORs