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The development of the mid‐intestine in melanoplus differentialis (acrididae : Orthoptera)

1935; Wiley; Volume: 58; Issue: 2 Linguagem: Inglês

10.1002/jmor.1050580205

1097-4687

Richard R. Stuart,

Neurobiology and Insect Physiology Research

Abstract A histological study has been made of the developing mid‐gut or mesenteron of Melanoplus differentialis from diapause until after hatching. The primitive mid‐gut consists at first of a single laver os squamous epithelium surrounding the yolk; to this is added later an outer layer. These two layers give rise to the muscular and connective tissue elements of the definitivo mid‐gut. Near the of hateching, vitellophanges which have been present in the yolk since earlier stages migrate peripherally to form a lining upon the inner surface of the primitive mid‐gut. The vitellophage nuclei divide to form the smaller nuclei of the definitive epithelium of the mid‐gut. The vitellophage nuclei divede to form the smaller nuclei of the definitive epithelium of the mid‐gut. The development of the definitive mesenteron fron the primitive mid‐gut takes place rapidly and occurs near the time of hatching.