Coevolution of generalist feeding ecologies and gyrencephalic mushroom bodies in insects. Export

@article{citeulike:432015, abstract = {Here we demonstrate the independent acquisition of strikingly similar brain architectures across divergent insect taxa and even across phyla under similar adaptive pressures. Convoluted cortical gyri-like structures characterize the mushroom body calyces in the brains of certain species of insects; we have investigated in detail the cellular and ecological correlates of this morphology in the Scarabaeidae (scarab beetles). "Gyrencephalic" mushroom bodies with increased surface area and volume of calycal synaptic neuropils and increased intrinsic neuron number characterize only those species belonging to generalist plant-feeding subfamilies, whereas significantly smaller "lissencephalic" mushroom bodies are found in more specialist dung-feeding scarab beetles. Such changes are not unique to scarabs or herbivores, because the mushroom bodies of predatory beetles display similar morphological disparities in generalists vs. specialists. We also show that gyrencephalic mushroom bodies in generalist scarabs are not associated with an increase in the size of their primary input neuropil, the antennal lobe, or in the number of antennal lobe glomeruli but rather with an apparent increase in the density of calycal microglomeruli and the acquisition of calycal subpartitions. These differences suggest changes in calyx circuitry facilitating the increased demands on processing capability and flexibility imposed by the evolution of a generalist feeding ecology.}, address = {Department of Biology, West Virginia University, P.O. Box 6057, Morgantown, WV 26506.}, author = {Farris, S. M. and Roberts, N. S.}, citeulike-article-id = {432015}, citeulike-linkout-0 = {http://dx.doi.org/10.1073/pnas.0508430102}, citeulike-linkout-1 = {http://view.ncbi.nlm.nih.gov/pubmed/16293692}, citeulike-linkout-2 = {http://www.hubmed.org/display.cgi?uids=16293692}, day = {29}, doi = {10.1073/pnas.0508430102}, issn = {0027-8424}, journal = {Proc Natl Acad Sci U S A}, keywords = {05matheco25\_empiric, afferent, behavior, carnivore, cat\_evolution, method\_analysis, sociality}, month = {November}, number = {48}, pages = {17394--17399}, posted-at = {2005-12-09 14:54:14}, priority = {0}, title = {Coevolution of generalist feeding ecologies and gyrencephalic mushroom bodies in insects.}, url = {http://dx.doi.org/10.1073/pnas.0508430102}, volume = {102}, year = {2005} }

TY - JOUR ID - citeulike:432015 L3 - citeulike-article-id:432015 N2 - Here we demonstrate the independent acquisition of strikingly similar brain architectures across divergent insect taxa and even across phyla under similar adaptive pressures. Convoluted cortical gyri-like structures characterize the mushroom body calyces in the brains of certain species of insects; we have investigated in detail the cellular and ecological correlates of this morphology in the Scarabaeidae (scarab beetles). "Gyrencephalic" mushroom bodies with increased surface area and volume of calycal synaptic neuropils and increased intrinsic neuron number characterize only those species belonging to generalist plant-feeding subfamilies, whereas significantly smaller "lissencephalic" mushroom bodies are found in more specialist dung-feeding scarab beetles. Such changes are not unique to scarabs or herbivores, because the mushroom bodies of predatory beetles display similar morphological disparities in generalists vs. specialists. We also show that gyrencephalic mushroom bodies in generalist scarabs are not associated with an increase in the size of their primary input neuropil, the antennal lobe, or in the number of antennal lobe glomeruli but rather with an apparent increase in the density of calycal microglomeruli and the acquisition of calycal subpartitions. These differences suggest changes in calyx circuitry facilitating the increased demands on processing capability and flexibility imposed by the evolution of a generalist feeding ecology. IS - 48 JF - Proc Natl Acad Sci U S A SN - 0027-8424 AD - Department of Biology, West Virginia University, P.O. Box 6057, Morgantown, WV 26506. EP - 17399 TI - Coevolution of generalist feeding ecologies and gyrencephalic mushroom bodies in insects. VL - 102 SP - 17394 KW - 05matheco25_empiric KW - afferent KW - behavior KW - carnivore KW - cat_evolution KW - method_analysis KW - sociality AU - Farris, SM AU - Roberts, NS PY - 2005/11/29/ UR - http://dx.doi.org/10.1073/pnas.0508430102 ER -