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Development of Central Nervous System in Scuttle Fly
Korean J Clin Lab Sci 2018;50:284-288  
Published on September 30, 2018
Copyright © 2018 Korean Society for Clinical Laboratory Science.

Ho-Hyun Park1, Mi-Suk Park2, Kil-Ju Na3

1Department of Biomedical Laboratory Science, Mokpo Science University, Mokpo, Korea
2Department of Medical Laboratory Science, Gimhae College, Gimhae, Korea
3Department of Radiology Science, Mokpo Science University, Mokpo, Korea
Correspondence to: Ho-Hyun Park
Department of Biomedical Laboratory Science, Mokpo Science University, 413-1 Yeongsan-ro, Mokpo 58644, Korea
Tel: 82-61-270-2745
Fax: 82-61-270-2745
This is an Open Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License ( which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.
The scuttle fly central nervous system (CNS) is unobservable during egg and larvae instar stage 1. During days 2∼3 of larvae instar stage 2, the left and right hemisphere of the brain can be observed. Below the brain, the subesophageal ganglion (SOG) connects to the ventral nerve cord (VNC). During days 3∼5 of larvae instar stage 3, the CNS enlarged slightly with no other changes. During days 1∼3 of the pupal stage the CNS moved to the head with no distinguishable changes from the previous stage. During days 4∼6 of the pupal stage, the left and right hemisphere of the brain had fused into one mass and the optic lobe (OL) located on the side of the brain completed its development. During days 7∼9 of the pupal stage, the OL began to show eyeball pigment. The SOG was connected to the brain and the VNC began to separate, which was accompanied by an increase in nerve fibers. During days 10∼12 of the pupal stage, the brain of the CNS and VNC was clearly distinguished and the brown pigmentation of OL became darker. During days 13∼15 days of the pupal stage, the separated brain and VNC became connected by thin nerve fiber. The VNC began to separate into two with a greater increase in nerve fibers. The adult fly showed similar features to the previous stage, but the brain was located in the head and the VNC in the chest.
Keywords : Brain, Central nervous system, Megaselia scalaris, Scuttle fly, Ventral nerve cord

September 2018, 50 (3)
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