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Histological studies of the neurosecretory and retrocerebral complex of the water beetle, Hydrophilus olivaceus Fabr. (Insecta, Coleoptera) (1972)

Gundevia, H. S. ; Ramamurty, P. S.

Springer

Zoomorphology 71 (1972), S. 355-375

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ISSN: 1432-234X

Source: Springer Online Journal Archives 1860-2000

Topics: Biology

Notes: Abstract The neurosecretory cells (NSC) in the breeding phases show gigantic sized droplets. NSC show two peaks of activity in females at midnight and at 9 A.M., while a single peak occurs in males between midnight and 3 A.M. Light has a triggering effect on the neurosecretory release. The corpus cardiacum is the main neurohaemal organ. It has a nerve core formed by the nervi corpus cardiacum I and II, which is surrounded by the glandular region. Intrinsic secretory chromophilic cells and chromophobic cells occur randomly. Aorta is probably not a storage-release centre. The corpora allata are lobulated structures, showing cyclical activity which is correlated with egg-maturation. No neurosecretory material occurs in allatum.

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1007/BF00298344

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