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Simple Predictors Of Bite Force In Bats: The Good, The Better, And The Better Still, Patricia W. Freeman, Cliff A. Lemen
Simple Predictors Of Bite Force In Bats: The Good, The Better, And The Better Still, Patricia W. Freeman, Cliff A. Lemen
University of Nebraska State Museum: Mammalogy Papers
Bite forces of 39 species from six families of New World bats with a variety of diets are quantified with a force meter under field conditions. Using regression approaches we search for a model that is a good morphological predictor of these bite forces. Body mass, an index that ignores differences in skull morphology, has a statistically significant relationship with bite force (R2 = 0.76) but is a relatively poor predictor compared with our best model (R2 = 0.94). The two best models of the eight we examine are one based on an estimate of strength …
Canine Teeth Of Bats (Microchiroptera): Size, Shape And Role In Crack Propagation, Patricia W. Freeman
Canine Teeth Of Bats (Microchiroptera): Size, Shape And Role In Crack Propagation, Patricia W. Freeman
University of Nebraska State Museum: Mammalogy Papers
Upper canines in microchiropteran bats show a variety of cross-sectional shapes. A consistent feature of all species studied here is that the tooth is edged and not simply round or oval. Prominent sharp edges are positioned in several directions but particularly antero-medially toward the incisors and posteriorly toward the premolars. These edges appear to direct the cracks made in food items to the incisors or to the premolars. A continuous cutting edge is apparent in the occlusal view of the palate running from tip of canine to the ectoloph of the molars. Size and shape analysis indicates that larger bats …
Frugivorous And Animalivorous Bats (Microchiroptera): Dental And Cranial Adaptations, Patricia W. Freeman
Frugivorous And Animalivorous Bats (Microchiroptera): Dental And Cranial Adaptations, Patricia W. Freeman
University of Nebraska State Museum: Mammalogy Papers
The most derived fruit-eating bats have small canines, wide palates and molars with a distinctive labial rim. Paracone and metacone have moved from a dilambdodont position in the middle of the tooth to the labial side of the tooth where they form the labial cutting edge. Along with the well-developed and close fitting labial cutting edges of the premolars and canines, this cutting edge skirts nearly the entire perimeter of the palate. The labial rim of the lower teeth fit inside the labial rim of the upper teeth like two cookie cutters nesting one inside the other. Frugivores have a …
Functional Cranial Analysis Of Large Animalivorous Bats (Microchiroptera), Patricia W. Freeman
Functional Cranial Analysis Of Large Animalivorous Bats (Microchiroptera), Patricia W. Freeman
University of Nebraska State Museum: Mammalogy Papers
Large animalivorous bats include carnivorous, piscivorous and insectivorous microchiropterans. Skull proportions and tooth morphology are examined and interpreted functionally. Four wide-faced bats from four families are convergent in having wide skulls, large masseter muscle volumes and stout jaws, indicating a powerful bite. Three of the four also have long canine teeth relative to their maxillary toothrows. Carnivorous bats have more elongate skulls, larger brain volumes and larger pinnae. The wide-faced bats are all oral emitters and have heads positively tilted relative to the basicranial axis. The carnivorous species are nasal-emitting bats and have negatively tilted heads. The orientation of the …