Premium
A study of mistichthys luzonensis with special reference to conditions correlated with reduced size
Author(s) -
Te Winkel Lois E.
Publication year - 1935
Publication title -
journal of morphology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.652
H-Index - 74
eISSN - 1097-4687
pISSN - 0362-2525
DOI - 10.1002/jmor.1050580207
Subject(s) - biology , hatching , yolk , epithelium , anatomy , connective tissue , ecology , genetics
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 layer of 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 definitive mid‐gut. Near the time of hatching, vitellophages 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 development of the definitive mesenteron from the primitive mid‐gut takes place rapidly and occurs near the time of hatching.