title: Neuroendocrine system and storage of neurosecretory material in the dorsal aorta in a bug Chrysocoris stollii Wolf (Heteroptera: Pentatomidae).
abstract: The neuroendocrine system of Chrysocoris stollii has been described with the help of PF bulk-stained preparations and sections. Two groups of median neurosecretory cells (NSC), each consisting of 5 A-cells in females and 7 A-cells in male individuals together with 3 B-cells, have been observed in the pars intercerebralis medialis of the brain. The lateral neurosecretory cells are absent. The axons of the two groups of median neurosecretory cells give off two bundles of neurosecretory axonal pathways which decussate in the anterodorsal part of the protocerebrum. From the point of decussation the two pathways run deep into the protocerebrum and deutocerebrum and emerge from the tritocerebrum as nervi corporis I (NCC I). The NCC I of both the sides enter into the aorta wall. The NSM is present in the aorta wall only, which comes from the bain through the NCC I. The nervi corporis cardiaci II (NCC II) are two short nerves originating from the tritocerebrum and entering the corpora cardiaca of its side. Two posteriorly fused oval corpora cardiaca are present below the aorta and dorsal to the oesophagus. A single semicircular corpus allatum is present behind the corpora cardiaca. Two oval A-type neurosecretory cells are present in the suboesophageal ganglion whereas other ganglia of the nerve cord lack the NSC. The aorta acts as a neurohaemal organ in this insect.
mesh_terms: D000818:Animals; D001011:Aorta / Q000294:innervation*; D001369:Axons / Q000648:ultrastructure; D001921:Brain / Q000033:anatomy & histology; D003335:Corpora Allata / Q000033:anatomy & histology; D005724:Ganglia / Q000033:anatomy & histology; D006430:Hemiptera / Q000033:anatomy & histology*; D009434:Neural Pathways / Q000033:anatomy & histology; D009474:Neurons / Q000648:ultrastructure; D009490:Neurosecretory Systems / Q000033:anatomy & histology*