Alimentary canal formation in the stonefly,Kamimuria tibialis (pictet) (Plecoptera : Perlidae) |
| |
| Affiliation: | 1. Whitehead Institute for Biomedical Research, Nine Cambridge Center, Cambridge, MA 02142, USA;2. Department of Biology, Massachusetts Institute of Technology, Cambridge, MA 02142, USA;3. Department of Biological Engineering, Massachusetts Institute of Technology, Cambridge, MA 02139, USA;4. Chromosome Instability and Dynamics Laboratory, Instituto de Biologia Molecular e Celular, Universidade do Porto, 4200-135 Porto, Portugal;5. i3S – Instituto de Investigação e Inovação em Saúdem, Universidade do Porto, 4200-135 Porto, Portugal;6. Cell Division Unit, Department of Experimental Biology, Faculdade de Medicina, Universidade do Porto, 4200-135 Porto, Portugal |
| |
| Abstract: | The alimentary canal formation in the stonefly, Kamimuria tibialis (Plecoptera : Perlidae) is described. The stomodaeum is formed as in other insect embryos. The proctodaeum is derived from the ectodermal fold an the caudal end of the embryo without the contribution of the amnion. The 3 Malpighian tubules develop from the blind end of the proctodaeum. The rectal pad is formed by the thickening of the dorsal wall of the proctodaeum. The midgut epithelium rudiment arises only from the blind end of the proctodaeum, i.e. it is completed by unipolar formation instead of bipolar. The yolk cells do not contribute to the formation of the midgut epithelium. The alimentary canal is transformed during the 1st nymphal instar and becomes functional in the next instar. The stomodaeum is differentiated into 3 parts: pharynx, oesophagus, and proventriculus. The midgut becomes shortened and its epithelium is well developed. Gastric caeca with tapering processes are formed. |
| |
| Keywords: | |
| 本文献已被 ScienceDirect 等数据库收录！ |
|
