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Wyświetlanie 1-10 z 158
Tytuł:
Parasites of carnivorous mammals in Bialowieza Primeval Forest
Autorzy:
Gorski, P
Zalewski, A.
Lakomy, M.
Tematy:
parasite
protozoan species
carnivorous mammal
mammal
nematode
trematode
wild mammal
Bialowieza National Park
Pokaż więcej
Wydawca:
Polskie Towarzystwo Parazytologiczne
Powiązania:
https://bibliotekanauki.pl/articles/840376.pdf  Link otwiera się w nowym oknie
Opis:
Background. Although the parasitofauna of wild carnivorous mammals in Poland is quite well recognized, there has been only one research carried on this issue so far in Białowieża Forest - the last lowland primeval forest of temperate zone in Europe. Material and methods. Twelve wild and two domestic species of carnivorous mammals are living in Białowieża Forest. In our work faeces or intestines of all of them except ermine (Mustela erminea) have been examined and parasites or their eggs (or oocysts) recorded. In total 222 faecal probes from 13 species and 11 intestines of weasels have been investigated. Results. All species of examined carnivorous mammals were infected with parasites. The most infected species has occurred red fox Vulpes vulpes (over 70% infected with parasites) meanwhile only about 30% of otters Lutra lutra were infected. We found at least three protozoan species, one trematode, one tapeworm and nine species of nematodes. Except trematode Alaria alata, all of them are reported for the first time from Białowieża Primeval Forest. Oocysts of coccidia have been found in faeces of nine host species, with the highest prevalence (29.4%) in badger. Six species of carnivorous mammals have been occurred infected with trematodes (highest prevalence 42.1% in wolves) and two with tapeworms (Diphyllobothrium latum with the prevalence 2.6% in otter and 31.6% in wolves). All examined host species were infected with nematodes (with prevalence from 14.7% in lynx to 72.7% in red fox). Results of our work should be treated as preliminary researches on the species composition of parasitic fauna invading carnivorous mammals in Białowieża Primeval Forest.
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Parasites of carnivorous mammals in Bialowieza Primeval Forest
Autorzy:
Górski, P.
Zalewski, A.
Łakomy, M.
Tematy:
parasite
protozoan species
carnivorous mammal
mammal
nematode
trematode
wild mammal
Bialowieza National Park
Pokaż więcej
Wydawca:
Polskie Towarzystwo Parazytologiczne
Powiązania:
https://bibliotekanauki.pl/articles/2144088.pdf  Link otwiera się w nowym oknie
Opis:
Background. Although the parasitofauna of wild carnivorous mammals in Poland is quite well recognized, there has been only one research carried on this issue so far in Białowieża Forest - the last lowland primeval forest of temperate zone in Europe. Material and methods. Twelve wild and two domestic species of carnivorous mammals are living in Białowieża Forest. In our work faeces or intestines of all of them except ermine (Mustela erminea) have been examined and parasites or their eggs (or oocysts) recorded. In total 222 faecal probes from 13 species and 11 intestines of weasels have been investigated. Results. All species of examined carnivorous mammals were infected with parasites. The most infected species has occurred red fox Vulpes vulpes (over 70% infected with parasites) meanwhile only about 30% of otters Lutra lutra were infected. We found at least three protozoan species, one trematode, one tapeworm and nine species of nematodes. Except trematode Alaria alata, all of them are reported for the first time from Białowieża Primeval Forest. Oocysts of coccidia have been found in faeces of nine host species, with the highest prevalence (29.4%) in badger. Six species of carnivorous mammals have been occurred infected with trematodes (highest prevalence 42.1% in wolves) and two with tapeworms (Diphyllobothrium latum with the prevalence 2.6% in otter and 31.6% in wolves). All examined host species were infected with nematodes (with prevalence from 14.7% in lynx to 72.7% in red fox). Results of our work should be treated as preliminary researches on the species composition of parasitic fauna invading carnivorous mammals in Białowieża Primeval Forest.
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Ankle structure in Eocene pholidotan mammal Eomanis krebsi and its taxonomic implications
Autorzy:
Horovitz, I
Storch, G.
Martin, T.
Tematy:
pholidotan mammal
Eomanis krebsi
mammal
Eocene
taxonomy
paleontology
Pokaż więcej
Wydawca:
Polska Akademia Nauk. Instytut Paleobiologii PAN
Powiązania:
https://bibliotekanauki.pl/articles/21524.pdf  Link otwiera się w nowym oknie
Opis:
Georges Cuvier (1798) established the classical concept of Edentata which included sloths, anteaters, armadillos, aardvarks, and pangolins. With the growing body of comparative morphological data becoming available during the nineteenth century, it was evident that Cuvier's “Edentata” was an artificial group (e.g., Huxley 1872). In his classical textbook, Weber (1904) excluded aardvarks and pangolins from the Edentata and put them in separate orders, Tubulidentata and Pholidota. Later on, fossil taxa were repeatedly added to and removed from Edentata, such as various xenarthran groups, taeniodonts, palaeanodonts, and gondwanatheres, but the South American Xenarthra always was considered as their core group. Even the living order Pholidota has been cited again as ?Edentata incertae sedis many years after Weber’s work (Romer 1966). The validity and extent of a higher taxon Edentata are still in dispute. In this discussion, the Middle Eocene pholidotan Eomanis and the putative xenarthran Eurotamandua from Grube Messel near Darmstadt (Germany) play an important role (Storch 1978, 1981, 2003; Rose and Emry 1993; Gaudin and Branham 1998; Rose 1999). Eomanis krebsi and Eurotamandua joresi have been subject to some discussion regarding their taxonomic distinction. It has been suggested that the only specimen known of Eo. krebsi might actually be a juvenile representative of the senior species E. joresi. A reexamination of the type specimen of Eo. krebsi has yielded some new observations regarding the identity of some of its ankle elements. An element that was previously identified as a navicular, is here reidentified as a partial distal tibia, whereas a partially exposed calcaneus had gone unnoticed. These two elements display several differences in morphology between Eo. krebsi and E. joresi, indicating that these are in fact distinct species.
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A eutherian mammal in the latest Cretaceous of Vitrolles, Southern France
Autorzy:
Tabuce, R
Vianey-Liaud, M.
Garcia, G.
Tematy:
eutherian mammal
Eutheria
mammal
Cretaceous
Mammalia
Vitrolles
France
paleontology
Pokaż więcej
Wydawca:
Polska Akademia Nauk. Instytut Paleobiologii PAN
Powiązania:
https://bibliotekanauki.pl/articles/22800.pdf  Link otwiera się w nowym oknie
Opis:
In Europe, the fossil record of the eutherian mammals is very scanty for the Late Cretaceous, as only two genera, documented by isolated teeth, are presently recorded in France and in Spain. Both genera, Labes and Lainodon, are considered to be representatives of the “zhelestids”, a paraphyletic unit regarded as being at the origin of Cenozoic ungulates within the Ungulatomorpha clade. We here describe Valentinella vitrollense gen. et sp. nov. from Vitrolles la Plaine (Maastrichtian, southern France). This species, represented by fragmentary remains of lower and upper dentitions, is tentatively assigned to the “zhelestids” according to the hypoconulid−entoconid twinning and the antero−posteriorly short trigonid on m1–3. The occlusal surfaces are obliterated by dental attrition, but Valentinella could be an evolved “zhelestid”, more derived than Labes and Lainodon by its fully compressed trigonid. Valentinella is similar to Gallolestes by other derived characters such as a crushing specialization of the teeth, associated with a probably molariform p4 (or dp4) and slightly reduced m3. The enamel microstructure, showing a radial prismatic pattern combined with a reduced interprismatic matrix, in which cristallites are oriented at about 45° to the prisms axes, appears compatible with the ancestral morphotype for all ungulates; although no synapomorphy can be proposed for the ungulatomorphs.
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
New data on anatomy of the Late Cretaceous multituberculate mammal Catopsbaatar
Autorzy:
Kielan-Jaworowska, Z
Hurum, J.H.
Currie, P.J.
Barsbold, R.
Tematy:
mammal
Cretaceous
Late Cretaceous
anatomy
Catopsbaatar catopsaloides
Catopsbaatar
multituberculate mammal
Pokaż więcej
Wydawca:
Polska Akademia Nauk. Instytut Paleobiologii PAN
Powiązania:
https://bibliotekanauki.pl/articles/19969.pdf  Link otwiera się w nowym oknie
Opis:
The Gobi Desert is famous for providing one of the worlds best preserved Cretaceous terrestrial faunas, including dinosaurs and mammals. Beginning with the Central Asiatic Expeditions in the 1920s, through the Polish−Mongolian Expeditions in the 1960s–1970s, Soviet−Mongolian Expeditions in 1970s, and finally the Mongolian Academy−American Museum Expeditions in the 1990s–2000s, the number of complete skulls (see Kielan−Jaworowska et al. 2000 for review) of Cretaceous mammals often associated with postcranial skeletons, found in Mongolia increased to several hundred. In addition to these professional expeditions, there have been other types of trips to Mongolia, also aimed at collecting fossils. The Nomadic Expeditions Company in USA organizes one of these, and has made trips to Mongolia since 1996. During the 1999 Nomadic Expedition, a skull associated with parts of the postcranial skeleton of the multituberculate mammal Catopsbaatar catopsaloides was found. The specimen is more complete than others previously known of this species and brings new data on multituberculate anatomy and ontogenetic variation. In this note we discuss the new data on the structure of C. catopsaloides; the details of its anatomy will be described in subsequent papers by the two first authors.
Dostawca treści:
Biblioteka Nauki
Artykuł
Wyświetlanie 1-10 z 158

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