Preferencje help
Polish version English version Język
Widoczny [Schowaj] Abstrakt
Liczba wyników

Znaleziono wyników: 8

Liczba wyników na stronie
Pierwsza strona wyników Pięć stron wyników wstecz Poprzednia strona wyników Strona / 1 Następna strona wyników Pięć stron wyników wprzód Ostatnia strona wyników

Wyniki wyszukiwania

Wyszukiwano:
w słowach kluczowych:  Proboscidea
help Sortuj według:

help Ogranicz wyniki do:
Pierwsza strona wyników Pięć stron wyników wstecz Poprzednia strona wyników Strona / 1 Następna strona wyników Pięć stron wyników wprzód Ostatnia strona wyników
1
Artykuł dostępny w postaci pełnego tekstu - kliknij by otworzyć plik
Content available

A new large mammal from the Ypresian of Morocco: evidence of surprising diversity of early proboscideans

100%
Gheerbrant E., Sudre J., Cappetta H., Iarochene M., Amaghzaz M., Bouya B.
Acta Palaeontologica Polonica
|
2002
|
tom 47
|
nr 3
We describe a new primitive proboscidean, Daouitherium rebouli gen. et sp. nov., from the early Ypresian of the Ouled Abdoun Basin, Morocco, which also yielded Phosphatherium. It is the earliest known large mammal from Africa and one of the oldest known proboscideans. It has true lophodont molars similar to those of Barytherium and Numidotherium. It is closer to these genera and more advanced than Phosphatherium (e.g., morphology of the mandible), but it is also primitive in striking features known also in Phosphatherium (absence of diastema, retention of two additional teeth in front of p2). A parsimony analysis of Daouitherium suggests its intermediate phylogenetic position between the basal, small Phosphatherium and the large, more derived Numidotherium and Barytherium. Daouitherium is a better candidate for the ancestry of N. koholense than Phosphatherium, but it is also specialized. Daouitherium and Numidotherium may belong to the same basal radiation of “Barytherioidea”. However, the family referral of Daouitherium is uncertain (Numidotheriidae?). The discovery of such a large and derived proboscidean with respect to Phosphatherium in the same African beds of such antiquity is evidence of an unexpected early diversity of proboscideans and of the old origin of the order. It also supports the African origin of Proboscidea s.s.
2

A supernumerary tooth and an odontoma attributable to Mammuthus primigenius [Blumenbach, 1799] [Mammalia, Proboscidea] from The Netherlands, and various related finds

100%
Van E. H.
Acta Zoologica Cracoviensia
|
2004
|
tom 47
|
nr 1-2
Two dental anomalies referable to Mammuthus primigenius (BLUMENBACH, 1799) are described. The first is a unilateral supernumerary tooth in a mandible with M3 in advanced wear (part I). A mandible with two supernumerary teeth from Otterstadt (Germany) was published earlier, but interpreted as an anomalous replacement of M2 by M3 (ADAM 1994). The discussion therefore focuses on the implications of this alternative theory and the arguments against it. On the basis of specimens in mandibles, some isolated finds of mammoth teeth from various locations in western Europe are tentatively presented as supernumerary. The second anomaly is a compound odontoma that developed around a normal M3. Previously published elephantid odontomas are discussed and a preliminary survey of their macroscopic characteristics as opposed to those of supernumerary teeth is presented. Some terminological problems arising from the imperfect morphological analogy between anomalies in human and elephantid dentitions are discussed.
3
Artykuł dostępny w postaci pełnego tekstu - kliknij by otworzyć plik
Content available

Reassessment of the generic attribution of Numidotherium savagei and the homologies of lower incisors in proboscideans

80%
Delmer C.
Acta Palaeontologica Polonica
|
2009
|
tom 54
|
nr 4
Near the end of the twentieth century, a medium−sized early proboscidean found in Dor El Talha (late Eocene to early Oligocene), Libya, originally identified as a small species of Barytherium, was described as a new species of Numidotherium and designated Numidotherium savagei. Poorly known, this taxon has been excluded from most of the recent debate about the origin and diversification of the order Proboscidea. New specimens described herein show strong structural similarities of the upper teeth with those of bunolophodont early proboscideans (e.g., Moeritherium and Phiomia) and document the shared presence of derived traits in the postcranial skeleton. The newly referred material also demonstrates some unique characteristics of this taxon, notably in its mandibular morphology and the microstructure of its dental enamel. Included for the first time in a cladistic analysis (207 anatomical characters applied to all early tethytheres), N. savagei is distinct from both Numidotherium and Barytherium, and lies in an “intermediate” position between the strictly lophodont Eocene proboscideans and the bunolophodont moeritheres and elephantiforms. Accordingly, the species is herein referred to a new genus, Arcanotherium. New data on its mandibular symphysis and, especially, on its lower incisors loci and morphology, bring new support to a hypothesis of homology between the lower incisors of early proboscideans and the ever−growing lower tusks of the elephantiforms, which are identified here as di1 and i1.
4
Artykuł dostępny w postaci pełnego tekstu - kliknij by otworzyć plik
Content available

Structure and evolution of mammoth molar enamel

80%
Ferretti M. P.
Acta Palaeontologica Polonica
|
2003
|
tom 48
|
nr 3
This work investigates the structure of Eurasian Plio–Pleistocene Mammuthus enamel, with attention to diagenesis and individual variability. A focal point of this study was to determine whether morphological trends in Mammuthus molars were accompanied by correlated enamel microstructure changes. In the examined four taxa the enamel of the cheek teeth consists of three layers delimited by two major discontinuities in enamel prism direction. Noticeably, the enamel capping the occlusal end of the unworn molar plates retains a less derived two−layered structure, similar to that found in the basal proboscidean Moeritherium. In Mammuthus meridionalis the third deciduous premolar is differentiated from all other teeth in having more strongly decussating Hunter−Schreger bands in the middle layer, as a possible reinforcement of the very thin enamel. Evidence from this analysis shows that, in the transition from late Middle Pliocene M. rumanus to Late Pleistocene M. primigenius, the middle enamel layer, which is made up of prisms at an angle to the occlusal surface, providing greater resistance against wear, increased its relative thickness. This is consistent with the hypothesis that Mammuthus adapted to a more abrasive diet. Comparison with other proboscidean taxa indicates that the schmelzmuster (enamel pattern) found in Mammuthus is a synapomorphy of the Elephantoidea.
5

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
6
Artykuł dostępny w postaci pełnego tekstu - kliknij by otworzyć plik
Content available

Late Miocene large mammals from Yulafli, Thrace Region, Turkey, and their biogeographic implications

80%
Geraads D., Kaya T., Mayda S.
Acta Palaeontologica Polonica
|
2005
|
tom 50
|
nr 3
Collecting over the last twenty years in sand and gravel quarries near Yulafli in European Turkey has yielded a substantial fauna of large mammals. The most significant of these for biochronology are well−preserved remains of the ursid Indarctos arctoides, the suid Hippopotamodon antiquus, and several rhino genera. They point to a late Vallesian (MN 10−equivalent) age. Several other taxa, of longer chronological range, are in good agreement with this dating. The Proboscidea include, besides the Eastern Mediterranean Choerolophodon, the Deinotherium + Tetralophodon association, commonly found in Europe, and the rare “Mastodon” grandincisivus, here reported for the first time in the Vallesian. The age of Yulafli shows that the large size of some taxa, such as Deinotherium (size close to that of D. gigantissimum) and Dorcatherium, does not always track chronology. The Yulafli fauna is close in composition and ecology to other localities in Turkish Thrace, and also shares several taxa unknown in Anatolia, especially Dorcatherium, with the North−Western European Province. It reflects a forested/humid landscape that extended in Vallesian times along the Aegean coast of Turkey, perhaps as far South as Crete, quite distinct from the open environments recorded at the same period in Greek Macedonia and Anatolia, and probably more like the central European one. Together with the establishment of a Tethys–Paratethys marine connection, this “Eastern Aegean Province” likely acted as an ecological barrier that hindered East−West migrations of open−country large mammals, such as bovids or long−limbed giraffes, and might have contributed to the differentiation of Ouranopithecus and Ankarapithecus.
7

Uwagi dotyczące wykazu chronionych ssaków w Wietnamie

61%
van Sung C.
Chrońmy Przyrodę Ojczystą
|
1991
|
tom 47
|
nr 3
8

Prevalence of Cryptosporidium in mammals housed in Poznan Zoological Garden, Poland

51%
Majewska A. C., Kasprzak W., Werner A.
Acta Parasitologica
|
1997
|
tom 42
|
nr 4
At the Zoological Garden in Poznań, Poland, 66 stool specimens from animals belonging to 40 species of 4 orders (Primates, Proboscidea, Perissodactyla and Artiodactyla) were examined for Cryptosporidium oocysts. Cryptosporidium oocysts were found in 7 of 66 faecal samples (9.1%) obtained from 6 different animal species. This is the first report of C. parvum in a lesser slow loris, white rhinoceros, Indian elephant and Thorold’s deer. The remaining Cryptosporidium-positive faecal specimens were collected from Japanese macaque and Eld’s deer.
Pierwsza strona wyników Pięć stron wyników wstecz Poprzednia strona wyników Strona / 1 Następna strona wyników Pięć stron wyników wprzód Ostatnia strona wyników
JavaScript jest wyłączony w Twojej przeglądarce internetowej. Włącz go, a następnie odśwież stronę, aby móc w pełni z niej korzystać.