Joerg Habersetzer

Learn More
Bats (Chiroptera) represent one of the largest and most diverse radiations of mammals, accounting for one-fifth of extant species. Although recent studies unambiguously support bat monophyly and consensus is rapidly emerging about evolutionary relationships among extant lineages, the fossil record of bats extends over 50 million years, and early evolution(More)
BACKGROUND The best European locality for complete Eocene mammal skeletons is Grube Messel, near Darmstadt, Germany. Although the site was surrounded by a para-tropical rain forest in the Eocene, primates are remarkably rare there, and only eight fragmentary specimens were known until now. Messel has now yielded a full primate skeleton. The specimen has an(More)
1. Rhinopoma hardwickei were studied under natural conditions in the Madurai region of southern India. 2. Frequency modulated (FM) sounds of 3 ms duration were emitted shortly before landing and during times when 10–70 individuals were flying in clusters as they left their roosts. 3. Constant frequency (CF) sounds of 48 ms duration were produced in open(More)
1. YoungHipposideros speoris emit multiharmonic sounds in groups of three to four notes. Newborns emit a relatively uniform pattern of FM- and FM/CF/FM-sounds. From ten days of age onwards the initial sound (first note) of a group is a FM-sound whereas the successive ones are CF/FM-sounds of consistently higher frequencies. At prevolant and volant stages of(More)
Despite being internal organs, digestive structures are frequently preserved in Cambrian Lagerstätten. However, the reasons for their fossilisation and their biological implications remain to be thoroughly explored. This is particularly true with arthropods--typically the most diverse fossilised organisms in Cambrian ecosystems--where digestive structures(More)
1. Myotis myotis was trained to discriminate a plate with 8 mm deep holes from plates of stepwise varied hole depth. Depth differences in the two plates equal or larger than 1 mm were discriminated by the echolocating bat (Fig. 3). 2. In a second series of experiments a plate with 4 mm deep holes was discriminated from other plates with hole depth(More)
In living organisms, color patterns, behavior, and ecology are closely linked. Thus, detection of fossil pigments may permit inferences about important aspects of ancient animal ecology and evolution. Melanin-bearing melanosomes were suggested to preserve as organic residues in exceptionally preserved fossils, retaining distinct morphology that is(More)
The question of monoor diphyletic origin of bats and the systematic status of the oldest known bats from the Eocene of Europe and North America has been the subject of controversy [ 1 6]. It is now generally accepted that all of these Eocene bats are microchiropterans and not ancestors of either Microor Megachiroptera as formerly proposed [2]. For the(More)
The early Middle Eocene locality of Grube Messel, near Darmstadt (Germany), is famous for its complete vertebrate skeletons. The degree of preservation of soft tissues, such as body silhouettes, internal organs and gut contents, is frequently remarkable. The present specimen was analyzed for remnants of the reproductive system. Classic anatomy and osteology(More)
1. Two hipposiderid bats,H. bicolor andH. speoris, were observed in their natural foraging areas in Madurai (South India). Both species hunt close together near the foliage of trees and bushes but they differ in fine structure of preferred hunting space:H. bicolor hunts within the foliage, especially whenH. speoris is active at the same time, whereasH.(More)