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Comparison of population characteristics of three species of shrews and the shrew-mole in habitats with different amounts of coarse woody debris

100%

Lee S. D.

Acta Theriologica

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1995

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tom 40

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nr 4

Seasonal fluctuation and its causes for three species of Sorex shrews and the shrew-mole Neurotrichus gibbsii Baird, 1857 were investigated in three sites with high amounts of coarse woody debris (CWD) and three sites with low amounts of CWD in managed forests of western Washington, USA. Sorex trowbridgii Baird, 1857 was more abundant on sites with high amounts of CWD (captures per 100 trapping nights), and had higher reproductive rates than in sites with low amounts of CWD. Sorex monticolus Merriam, 1890 showed higher reproductive rates on sites with high amount of CWD. Population of Sorex vagrans Baird, 1857 fluctuated greater and abundance was higher in sites with low amounts of CWD. Most reproduction occurred from January to April and declined rapidly in May. Previous studies also have shown an early onset of breeding in Coastal California and Oregon. It seems that local species of soricids and Neurotrichus gibbsii gain reproductive benefits by breeding primarily in January through May.

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Late Pliocene Erinaceidae and Talpidae [Mammalia: Insectivora] from Varshets [North Bulgaria]

80%

Popov V. V.

Acta Zoologica Cracoviensia

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2004

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tom 47

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nr 1-2

One hedgehog (Erinaceus cf. lechei), two moles (Talpa cf. levantis and "Scalopoides" cf. copernici), one shrew-mole (Quyania aff. polonica), and one desman (Desmana cf. polonica) are described from a Late Pliocene (MN17) karst fissure filling near the city of Varshets. Although the material is relatively well preserved, the exact determination was not possible because of the small samples and the fact that the taxonomy of the fossil forms from these groups is in a state of confusion. Up to now Late Pliocene remains of "Scalopoides" copernici and Quyania polonica have been known from Poland only. The occurrence of similar forms in Bulgaria during the Villanyian is considered as a relic situation, due to locally favorable conditions. The described insectivore assemblage is indicative of a temperate and humid climate, similar to the present-day conditions in SE Bulgaria.

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A new talpid from the late Eocene of North America

80%

Lloyd K. J., Eberle J. J.

Acta Palaeontologica Polonica

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2008

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tom 53

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nr 3

The origin and early evolution of talpids (moles, shrew−moles, and desmans) is not well understood, in large part due to the poor fossil record of early talpids. Here we report the oldest known talpid from North America, Oreotalpa florissantensis gen. et sp. nov., based upon a tiny dentary with m1–m3 discovered in upper Eocene (Chadronian) strata of the Florissant Formation, Florissant Fossil Beds National Monument, Colorado. Oreotalpa extends the North American record of talpids back by some six Ma and appears temporally correlative with the oldest documented talpids from the late Eocene of Europe. While others have postulated a Eurasian origin for talpids, discovery of Oreotalpa suggests that the evolution of the group was underway in North America by late Eocene time and raises the possibility of a North American origin.

Ograniczanie wyników

1 Acta Palaeontologica Polonica

1 Acta Theriologica

1 Acta Zoologica Cracoviensia

1 Eberle J. J.

1 Lee S. D.

1 Lloyd K. J.

1 Popov V. V.

1 2008

1 2004

1 1995

Comparison of population characteristics of three species of shrews and the shrew-mole in habitats with different amounts of coarse woody debris

Late Pliocene Erinaceidae and Talpidae [Mammalia: Insectivora] from Varshets [North Bulgaria]

A new talpid from the late Eocene of North America