A simple mushroom body in an African scarabid beetle

The Journal of Comparative Neurology
Mattias C LarssonN J Strausfeld

Abstract

This account describes novel mushroom body organization in a coleopteran insect, the African fruit chafer Pachnoda marginata. Each of its prominent mushroom bodies possesses a pair of simple calyces comprising two populations of Kenyon cells, the dendrites of which are organized into a central and an annular zone. Kenyon cells of the central zone extend their dendrites downward and toward the perimeter of the calyx. Their axon-like processes in the pedunculus are densely packed to make up a distinctive shaft of neuropil. Toward the front of the brain, the shafts, one from each calyx, bifurcate to provide a pair of subdivisions in the medial and vertical lobes. Dendrites of Kenyon cells supplying the annular zone extend from the calyx perimeter toward its center. Axons from the annular zones of both calyces together provide a sleeve of axons that ensheaths the two shafts. Sleeve axons bifurcate to provide a second pair of divisions in each of the lobes. These arrangements provide each lobe with a discrete representation of the two Kenyon cell populations of the two calyces. Kenyon cells supplying the central zone have dendritic morphologies reminiscent of class II clawed Kenyon cells that supply the gamma lobes in other taxa. Ke...Continue Reading

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Citations

Dec 8, 2005·Annual Review of Entomology·Susan E Fahrbach
Oct 27, 2015·Cell and Tissue Research·Martin KollmannJoachim Schachtner
Dec 24, 2014·Current Biology : CB·Gabriella H Wolff, Nicholas J Strausfeld
Jul 2, 2008·Arthropod Structure & Development·Sarah M Farris
Apr 15, 2008·Arthropod Structure & Development·Irina SinakevitchNicholas J Strausfeld
Jan 20, 2009·The Journal of Comparative Neurology·Nicholas J StrausfeldSarah M Farris
Apr 9, 2008·The Journal of Comparative Neurology·Nobuaki K TanakaKei Ito
Feb 10, 2009·Izvestiia Akademii nauk. Seriia biologicheskaia·A A Panov
Sep 1, 2005·The Journal of Comparative Neurology·Marcus SjöholmBill S Hansson
Sep 1, 2013·Izvestiia Akademii nauk. Seriia biologicheskaia·A A Panov

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