Fine structure and distribution of antennal sensilla of the desert locust, Schistocerca gregaria (Orthoptera: Acrididae)

1998 ◽  
Vol 291 (3) ◽  
pp. 525-536 ◽  
Author(s):  
Samuel A. Ochieng ◽  
Eric Hallberg ◽  
B. S. Hansson
Keyword(s):  
Fine Structure ◽  
Schistocerca Gregaria ◽  
Antennal Sensilla ◽  
Desert Locust

The architecture of the accessory reproductive glands of the desert locust IV. Fine structure of the glandular epithelium

1969 ◽  
Vol 256 (802) ◽  
pp. 85-114 ◽  
Keyword(s):  
Fine Structure ◽  
Phase Contrast ◽  
Electron Microscope Study ◽  
Schistocerca Gregaria ◽  
Mirror Image ◽  
Secretory Process ◽  
Desert Locust ◽  
Accessory Glands ◽  
Accessory Reproductive Glands ◽  
Gland Type

The male desert locust, Schistocerca gregaria , has two masses of thin glands, each mass containing 16 glands. The glands in each mass are arranged in a precise manner, which is a mirror image of the arrangement to be found in the other gland mass. They produce secretions which participate in the production of the spermatophore and most of its contents during mating. The fine structure of these glands is described in detail on the basis of an electron-microscope study of sectioned glands and their secretions. It is revealed that the characteristics of the glandular epithelia and their corresponding secretions lead to the division of the accessory glands into nine distinct types. This finding strengthens the recent division of the glands into nine types based on histological, histochemical, and phase-contrast features. One gland produces a proteinaceous, crystalline secretion (gland 1), three types of glands produce a minutely fibrous secretion (glands 2 and 4, and ‘homogeneous’ glands), three other gland types produce a globular secretion (glands 6, 11 and 12), and one gland type has a lipoid secretion (gland 3). Gland 16, the functional seminal vesicle, does not produce a recognizable secretion. The cytoplasmic organelles that are concerned in the secretory process, and the manner in which their development varies with each gland type, are discussed.

THE HISTOLOGY OF THE GIANT FIBRE SYSTEM IN THE ABDOMINAL VENTRAL NERVE CORD OF THE DESERT LOCUST

1970 ◽  
Vol 102 (9) ◽  
pp. 1163-1168 ◽  
Author(s):  
W. D. Seabrook
Keyword(s):  
Single Cell ◽  
Nerve Cord ◽  
Ventral Nerve Cord ◽  
Schistocerca Gregaria ◽  
Desert Locust ◽  
Giant Fibre ◽  
Metathoracic Ganglion ◽  
Giant Fibres ◽  
Giant Fibre System

AbstractSchistocerca gregaria possess four neurones of giant fibre proportions within the abdominal ventral nerve cord. These fibres arise from single cell bodies in the terminal ganglionic mass and pass without interruption to the metathoracic ganglion. Fibres become reduced in diameter when passing through a ganglion. Branching of the giant fibres occurs in abdominal ganglia 6 and 7.

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