title: The number and arrangement of elements in the lamina cartridge of the dragonfly Sympetrum rubicundulum.
abstract: Five monopolar cells and two long visual fibres are a consistent component of the lamina cartridge of the ventral half of the eye of the dragonfly Sympetrum rubicundulum. They communicate with the chiasm via a cartridge axon bundle comprising a minimum of ten fibres. The arrangement of these elements is documented with respect to the ommatidial photoreceptor axon bundle innervating them. These relationship are described both within the lamina cortex and in the cross-section of the underlying cartridge.
mesh_terms: D000818:Animals; D001369:Axons / Q000648:ultrastructure; D005123:Eye / Q000648:ultrastructure; D007313:Insecta / Q000648:ultrastructure*; D009412:Nerve Fibers / Q000648:ultrastructure; D009474:Neurons / Q000648:ultrastructure; D010786:Photoreceptor Cells / Q000648:ultrastructure