Persistent frontal sutures are of no clinical significance, although they can be mistaken for cranial fractures.

Frontal sutures are distinct, longitudinal edges are sharply defined.

"Frontal Suture."

Members of Calliphoridae have branched Rs 2 veins, frontal sutures are present, and calypters are well developed.

It is also called metopic suture, although this term may also refer specifically to a persistent frontal suture (further detailed in section below).

In most vertebrates, the frontal bone is paired, rather than presenting the single, fused structure found in humans (see frontal suture).

The frontal suture is a dense connective tissue structure that divides the two halves of the frontal bone of the skull in infants and children.

The antennae are three-segmented and aristate; vein Rs is two-branched, a frontal suture is present, and the calypters are well developed.

At birth the bone consists of two pieces, separated by the frontal suture, which is usually obliterated, except at its lower part, by the eighth year, but occasionally persists throughout life.

Not all species of insects have frontal sutures, but in those that do, the sutures split open during ecdysis, which helps provide an opening for the new instar to emerge from the integument.

A frontal eminence (or tuber frontale) refers to one of two rounded elevations on the frontal bone that lie about three centimeters above the supraorbital margin on each side of the frontal suture.

The large, inverted "U"-shaped suture in the face through which it came, however, is still quite visible, and it is this ptilinal suture or frontal suture from which the name "Schizophora" ("split-bearers") is derived.

Furthermore, some significant identifying characteristics for the adult flies in the family musicdae include a pair of antennae, three segmented plumose aristae, a frontal suture, well developed calypters, hypo pleura without bristles, and more than one sternopleural bristles.

It is used to force off the end of the puparium in order for the fly to emerge, and after this inflation at emergence, the ptilinum collapses back inside the head, marked thereafter only by the ptilinal suture or frontal suture (which defines the aperture through which it everts).

As persistent frontal sutures are visible in radiographs they can be useful for the forensic identification of human skeletal remains; Persistent frontal sutures should not be confused with supranasal sutures (a small zig-zag shaped suture located at and/or immediately superior to the glabella).