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The lobopod Onychodictyon from the Lower Cambrian Chengjiang Lagerstatte revisited

100%

Liu J., Shu D., Han J., Zhang Z., Zhang X.

Acta Palaeontologica Polonica

2008

tom 53

nr 2

Onychodictyon ferox, from the Lower Cambrian Chengjiang Lagerstätte, is a worm−like armored lobopod with 10 pairs of dorsal plates and a pair of probable sensory appendages (“antennae”). Newly discovered complete specimens show that Onychodictyon is represented by two species: O. ferox with a “head” bearing a pair of dorsal “antennae” and a trunk with 11 pairs of limbs, whereas O. gracilis has a blunt anterior end without any appendages and a trunk with 12 pairs of limbs. Because of the close resemblance of the “antennae” of O. ferox and those of the lobopod Miraluolishania, they are considered to be homologous structures. The “antennae” of Cambrian lobopodians are proposed to be homologous with the arthropod antennulae.

Habitat selection and the change in distribution of Asian elephants in Mengyang Protected Area, Yunnan, China

80%

Lin L., Feng L., Pan W., Guo X., Zhao J., Luo A., Zhang L.

Acta Theriologica

2008

tom 53

nr 4

Elephants were confined to Mengyang Protected Area in China and their distribution range had reduced greatly compared to past records. A preliminary study of habitat selection by Asian elephantsElephas maximus Linnaeus, 1758 and their distribution was conducted in Mengyang Protected Area and its surrounds using site visits and transect surveys from July 2003 to December 2006. Although no variable significantly influenced their habitat selection, elephants still showed preference for altitudes between 900 and 1200 m, gradients <30°, and orientations to the south-east, south and south-west. Human activities, including habitat transformation and degradation, disturbance by large infrastructure and poaching were considered to be the main factors inducing elephant distribution changes.

Fossil Trapa L. of China. 1. A new locality from the Miocene of the Liang He Coal Mine, West Yunnan

80%

Wojcicki J. J., Song S., Wang Y.

Acta Palaeobotanica

1999

tom 39

nr 1

Ograniczanie wyników

1 Acta Palaeobotanica

1 Acta Palaeontologica Polonica

1 Acta Theriologica

1 Feng L.

1 Guo X.

1 Han J.

1 Lin L.

1 Liu J.

1 Luo A.

1 Pan W.

1 Shu D.

1 Song S.

1 Wang Y.

1 Wojcicki J. J.

1 Zhang L.

1 Zhang X.

1 Zhang Z.

1 Zhao J.

2 2008

1 1999

Wyniki wyszukiwania

The lobopod Onychodictyon from the Lower Cambrian Chengjiang Lagerstatte revisited

Habitat selection and the change in distribution of Asian elephants in Mengyang Protected Area, Yunnan, China

Fossil Trapa L. of China. 1. A new locality from the Miocene of the Liang He Coal Mine, West Yunnan