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New insights into the early diversification of the Ostracoda: Tremadocian ostracods from the Cordillera Oriental, Argentina

100%
Salas M. J., Vaccari N. E.
Acta Palaeontologica Polonica
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2012
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tom 57
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nr 1
New species of ostracods from the Tremadocian in the northwest region of Argentina are described. These are among the earliest well−documented records of ostracods, which shed new light onto the early diversification of the group. The described fauna consists of seven species, five of which are new: Saltite uchuy sp. nov., Saltite kuraq sp. nov., Conchoprimitia? iglesiasi sp. nov., Orechina violetae sp. nov., and Orechina catalinae sp. nov. The fauna consists primarily of soanellids, a non−dimorphic family of palaeocopids, and of binodicopids. One factor leading to diversification of the group in this region may have been the complex configuration of the northwest basin, which had a restricted pattern of circulation. The distribution of the first ostracods is largely restricted to Gondwana and peri−Gondwana regions. Accordingly, it is possible to envision that the origin or at least an important radiation of the group was centred in this region. Both the Soanellidae and the genus Orechina would have originated in Gondwana and would have become widespread later during the Middle Ordovician. The Tremadocian fauna located in Argentina show significant affinities with fauna located in the warm−water setting of the east Gondwana, mainly in Australia and China.
2

Structural insights into AGC-kinase inhibitor binding from studies with the workhorse PKA

100%
Gabel M., Breitenlechner C. B., Herrero de Vega S., Engh R. A., Bossemeyer D.
Cellular and Molecular Biology Letters
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2003
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tom 08
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nr 2A
3
Artykuł dostępny w postaci pełnego tekstu - kliknij by otworzyć plik
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Capturing the social and cultural values of European forests: insights from “EFORWOOD”

84%
Edwards D.
Folia Forestalia Polonica. Series A . Forestry
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2009
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tom 51
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nr 1
This paper draws from research carried out as part of the EU-funded project ‘EFORWOOD-IP: Tools for Sustainability Impact Assessment of the European Forestry-Wood Chain’. The paper reports on a literature review to develop a generic template of social and cultural values and indicators associated with forests in Europe, and research to develop ‘forest recreational use’ as an indicator to assess the social impacts of changes in forest management as part of European impact assessment procedures.
4

Taxonomic history of the genus Anoura (Chiroptera: Phyllostomidae) with insights into the challenges of morphological species delimitation

84%
Jarrin-V P., Kunz T. H.
Acta Chiropterologica
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2008
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tom 10
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nr 2
A surge in new species descriptions must be accompanied by an equal amount of healthy skepticism. Herein, we critique the current approach to species delimitation for the genus Anoura and assess the methodology used in these studies. It is not uncommon for studies committed to the delimitation of species to incur in a mismatch between their underlying epistemological perspective and the nature of species as real entities or ontological individuals. This is the reason why these studies must capitalize on the statistical paradigm to ascertain the degree of vagueness upon their particular approximation to real or purportedly real species. It is common for species to have fuzzy boundaries and numerous sources of variation. Furthermore, as multi-organismal entities, species deserve a more cautious action to their delimitation than purely verbal descriptions from the point of view of a single observer. We highlight the need for quantifiable methods that provide clear perspectives on the magnitude of overlap and variability within and among species. We argue that the delimitation of complex entities as evolutionary species must be framed under the paradigm of hypothesis testing and measurable and concrete estimates of character states. Quantitative hypothesis testing should be a requirement for the practice of systematics, taxonomy and species delimitation. Species are not mind constructs but complex ontological individuals awaiting discovery by means of precise statements of uncertainty.
5

Land-cover change dynamics and insights into ecosystem services in European stream riparian zones

84%
Clerici N., Paracchini M. L., Maes J.
International Journal of Ecohydrology and Hydrobiology
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2014
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tom 14
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nr 2
6
Artykuł dostępny w postaci pełnego tekstu - kliknij by otworzyć plik
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New insight into the distribution and palaeobiology of the pycnodont fish Gyrodus

84%
Kriwet J., Schmitz L.
Acta Palaeontologica Polonica
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2005
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tom 50
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nr 1
The pycnodont fish Gyrodusis reported for the first time from the Lower Cretaceous of Germany based on two lower jaw elements from the Hauterivian and Barremian. The stratigraphic and geographic distribution of Gyrodus is summarized. Gyrodusranges from the Middle Jurassic to the Early Cretaceous making it one of the longest living pycnodonts. Unambiguous Late Cretaceous records of Gyrodus are still missing. Gyrodus displays its widest distribution and greatest taxonomic diversity in the Late Jurassic. The distribution of Gyrodusimplies not only near−coastal mode of life but also a pelagic lifestyle conversely to most other pycnodonts. External body features and function of the unpaired fins support this interpretation.
7

Etho-ecology of ciliates: a reappraisal of their adaptive biology, an insight in their environmental constraints

67%
Ricci N.
Acta Protozoologica
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1992
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tom 31
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nr 1
8
Artykuł dostępny w postaci pełnego tekstu - kliknij by otworzyć plik
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Connecting Hunter-Schreger Band microstructure to enamel microwear features: New insights from durophagous carnivores

59%
Tseng Z. J.
Acta Palaeontologica Polonica
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2012
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tom 57
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nr 3
Several recent studies have clarified the link between microwear features and diet among living carnivorans, but it is still unclear whether previously interpreted evolutionary trends for dietary specialization, based on examination of enamel microstructure, are consistent with such insights from microwear analysis. This study examined the relationship between microwear and microstructure features using a sample of fossil hyaenids and canids. Hunter−Schreger Bands (HSB) and microwear features were examined at the same magnification level using optical stereomicroscopy. Multiple trials conducted on each specimen showed higher variance of smaller (<0.03 mm) microwear features compared to large (>0.03 mm) features. The number of pits was positively correlated with more derived HSB in both p4 and m1; fossil teeth with derived HSB possessed microwear features similar to patterns found in modern spotted hyenas. Microscopic scratches were not as closely associated with HSB patterns, but large scratches were more tightly linked to HSB than smaller ones on p4. An examination of evolutionary trends in HSB specialization in the two carnivoran lineages showed that derived HSB patterns evolved prior to the highly robust craniodental characteristics typical of later bone−cracking ecomorphologies. Therefore, the increase of hard food in the diet of less specialized hyaenids and canids was accompanied by a mosaic mode of evolution, with microstructural changes preceding key macrostructural morphological adaptations.
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