frontal border

(redirected from frontal margin)

frontal border

[TA]
edge of a bone that articulates with the frontal bone. See: frontal border of parietal bone, frontal margin of sphenoid.
Synonym(s): margo frontalis [TA], frontal margin

fron·tal bor·der

(frŏntăl bōrdĕr) [TA]
Edge of a bone that articulates with frontal bone.
See: frontal border of parietal bone
References in periodicals archive ?
Frontal margin evenly arcuate, slightly projecting, marginal carina beaded.
nivalis (Fleutiaux & Germain) in size, differing in having the integument pale yellow, including the head; reduced elytral maculae; dorsal sculpture finer in diameter and depth, with the pronotal and elytral punctures larger and the interpunctural spaces wider, 1.0-1.3 time their own diameter; the frontal margin finely carinate and lacking a narrow submarginal impression; and the aedeagal parameres shouldered and attenuate, with a long apical seta each (Fig.
Frontal margin narrowly shelf-like, slightly reflexed, carinate; nasale with median carina.
Along this transect, deformation is mostly concentrated in the frontal margin of the Khisor Range that makes the hanging wall strata of the Khisor Thrust.
Pronotum relatively flat, frontal margin of pronotum slightly projecting as obtuse triangle; median carina completed, lateral carinae parallel on prozona, the prozona nearly square; humeri forming an obtuse triangle, with a pair of abbreviated carinaes between humeri.
Short frontal margin completely covering anterior edge and extending to turning point between anterior and posterior curves.
fluviatilis: (A) individuals with the carapace tending toward a square shape, its surface flattened and irregular, the branchial region flattened or concave, and the lateral margins sharp, provided with 2 (rarely 3) notches; the frontal margin is visible in dorsal view; the lower orbital margin has distinct granules; (B) individuals with the carapace more orbicular in shape, its surface less irregular, the branchial region clearly convex, and the lateral margins rounded and smooth, devoid of teeth; the frontal margin not visible in dorsal view; the lower orbital margin with smaller granules.
However, during the preliminary examination of the material deposited at MZUESC, some extreme morphological variations among the specimens were observed, especially in the lateral margin of the carapace, the frontal margin, and the orbits.
fluviatilis collected in the study area: form A--characterized by the frontal margin of the carapace bordered by conspicuous granules, the anterolateral margin provided with developed teeth plus granules, and the posterolateral margin provided with granulation similar to that found on the front (Figs.
Deformation intensity and crustal shortening observed high southeastward in the frontal margin of Khisor Range where the deepest and non-outcropping rocks of the Marwat Range protrude southeast against the Siwalik Group rocks in the form of a tectonic wedge.
The species of Uroleucon have a frontal margin and a frontal medial tubercle varying in shape; the following terms are used to describe the frontal margin: (1) V-shaped if it is deep with a small frontal medial tubercle that does not alter the profile of the frons; (2) subrectangular, if it is well-defined though not very deep and the frontal medial tubercle is low; and (3) sinuate, if the frontal margin is not very deep and the frontal medial tubercle is almost as high as the frontal lateral ones delimiting the margin.
Head dark brown, like coxae, and darker than trochanters; frontal margin subrectangular; dorsal setae 58-70 [micro]m, 1.8-2.3 times D.