Bats : a world of science and mystery by Fenton, Melville Brockett; Simmons, Nancy B

By Fenton, Melville Brockett; Simmons, Nancy B

There are greater than 1,300 species of bats - or nearly 1 / 4 of the world's mammal species. yet prior to you curb in worry from those hairy "creatures of the night," think about the bat's primary function in our environment. A unmarried ten-gram bat may perhaps consume a number of thousand bugs in an evening. during the tropics and subtropics, fruit and nectar-feeding bats also are an important to the lives of crops, offering both Read more...

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There are greater than 1,300 species of bats - or nearly 1 / 4 of the world's mammal species. yet ahead of you lessen in worry from those hairy "creatures of the night," ponder the bat's fundamental Read more...

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This may be due to changes in climate and vegetation. Modern bat faunas are much more diverse in tropical forests than in grassland environments, so perhaps the differences in diversity seen over time at Riversleigh reflect ecological changes. Conversely, preservation may be biasing the composition of these faunas. For example, the Pliocene bat fossils come mostly from a single fossil cave at Riversleigh known as Rackham’s Roost. Any local bat species not roosting in that cave when the deposits were laid down remain undiscovered.

1) Note that while Old World Disk-winged Bats (Myzopodidae) and New Zealand Short-tailed Bats (Mystacinidae) have a very restricted distribution, Vesper Bats are widespread. ), Smoky Bats (Furipteridae) and New World Disk-winged Bats (Thyropteridae), occur only in the Western Hemisphere (the Americas). , Southampton Island in Hudson’s Bay, there are none from the Antarctic. Mind you, it is only a matter of time before fossil bats are found in both areas, reflecting changes in the distributions of bats that in turn reflect changes in prevailing climates.

Details of the shapes of surfaces at the two ends of the humerus where they connect with other bones differ in different lineages of bats, often being characteristic of individual species. Some fossil bats are known only from isolated humerus bones. One such species is Mormoops magna from the Caribbean. Living species of Mormoops occur throughout much of the Neotropics, ranging southern Arizona to Peru and on many Caribbean islands. The large extinct Mormoops— bigger than any living member of the group—was described in 1974 based on two isolated humeri recovered from Pleistocene Cuban cave deposits.

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