|
|
Post by Gorilla king on Dec 10, 2021 10:34:24 GMT -5
|
|
|
|
Post by Gorilla king on Dec 10, 2021 10:47:11 GMT -5
|
|
|
|
Post by Gorilla king on Dec 10, 2021 10:50:35 GMT -5
|
|
|
|
Post by Gorilla king on Dec 10, 2021 13:28:18 GMT -5
|
|
|
|
Post by Gorilla king on Dec 10, 2021 14:01:56 GMT -5
The first finding of Asian black bear (Carnivora, Ursidae, Ursus (Euarctos) thibetanus G. Cuvier, 1823) in the Late Pleistocene of northern Eurasia
Abstract
An M1 tooth of Asian black bear (Ursus (Euarctos) thibetanus G. Cuvier, 1823) was found in deposits of the Tetyukhinskaya cave (Middle Sikhote-Alin, 44°35′N, 135°36′E). This finding is the first reliable evidence of Asian black bear’s presence in Pleistocene of Primorye. Its morphological and morphometric descriptions are given. The period of inhabitation of U. (E.) thibetanus determined based on the radiocarbon date obtained during the study of the tooth, is 39 874 ± 133 BP (NSK-850, UGAMS-21786), which corresponds to the middle of Marine Isotope Stage 3 (MIS 3) of Late Pleistocene. The composition of ancient theriofauna indicates the existence of wide variety of landscapes in Primorye in the middle of Late Pleistocene. A refugium of forest fauna, in which species of taiga, nemoral, and Central Asian mountain–forest theriocomplexes were present, was located in southern Primorye in Late Pleistocene.
www.researchgate.net/publication/312263226_The_first_finding_of_Asian_black_bear_Carnivora_Ursidae_Ursus_Euarctos_thibetanus_G_Cuvier_1823_in_the_Late_Pleistocene_of_northern_Eurasia
|
|
|
|
Post by Gorilla king on Jun 15, 2022 12:15:24 GMT -5
|
|
|
|
Post by Gorilla king on Jun 15, 2022 12:20:16 GMT -5
 Middle Pleistocene black bear from Japan with a comparison of the left upper second molars (M2) among bears. 1, Middle Pleistocene (ca. 337–330 Kilo annum, MIS 9 [68]) black bear, Ursus thibetanus subsp. indet., from Aomori Prefecture, northern Japan (NMNS-PV 22666). 2, Extant Japanese black bear, Ursus thibetanus japonicus, from Nagano Prefecture, central Japan (NMNS-PO 52). 3, Extant Tibetan black bear, Ursus thibetanus thibetanus, from Thailand (NMNS-PO 207). 4, Extant Hokkaido brown bear, Ursus arctos yesoensis, from Hokkaido, northern Japan (NMNS-PO 208). The black bears share a combination of M2 characters such as a relatively large metacone (as large as the paracone), a distinct constriction between the paracone and the metacone, and a less developed posterior talon. In contrast, the brown bear has a smaller metacone relative to the paracone, a less distinct constriction between the two cusps, and a well developed posterior talon in M2. These comparisons suggest that the tooth of Middle Pleistocene Japanese black bear is closer in size and shape to the teeth of continental black bears than it is to extant Japanese black bears, but it is far from the brown bearswww.researchgate.net/figure/Middle-Pleistocene-black-bear-from-Japan-with-a-comparison-of-the-left-upper-second_fig4_282243778 |
|
