I would call it a midline incision:
Deciding the right type of surgical incision is extremely important.
The ideal incision allows:
ease of access to the desired structures
can be extended if needed
ideally muscles should be split rather than cut
heals quickly with minimal scarring
aesthetically pleasing
It is also important that incisions are placed in the direction of lines of cleavage of the skin (Langer's lines) so that a hairline scar is the outcome. These lines correspond to the direction of collagen fibres in the dermis and epidermis.
Incisions should also be placed as far as possible from stoma sites in order to avoid interfering with the stoma site and causing complications such as retraction and prolapse of the stoma.
Surgical incisions on the abdomen can be divided into transverse, vertical and oblique incisions.
Vertical incision 1: Midline incision
Use: Virtually all abdominal procedures may be performed through this incision.
Location: in the midline of the abdomen, and can extend from the xiphoid process to just above the umbilicus. It can be continued to below the umbilicus by curving the incision around the umbilicus.
Layers of the abdominal wall: skin, fascia (camper's and scarpa's), linea alba, transversalis fascia, extraperitoneal fat and peritoneum.
Midline abdominal scar
Advantages
Adequate exposure of most if not all of the abdominal viscera
Minimal blood loss as the incision is through the linea alba
Minimal nerve injury
Minimal muscle injury
Can be quickly made, such as in an emergency and quickly closed with a mass closure technique
Disadvantages
Care needs to be taken just above the umbilicus where the falciform ligament is
Midline scar
http://www.fastbleep.com/medical-notes/surgery/8/8/37