crista transversalis

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Related to transverse ridge: Oblique ridge, triangular ridge

cris·ta trans·ver·sa·lis

[TA]
a crest or ridge on the occlusal surface of a tooth formed by the union of two triangular crests.
Synonym(s): transverse ridge [TA], transverse crest (2)

cris·ta trans·ver·sa·lis

(kristă tranzvĕr-sālis) [TA]
Crest or ridge on occlusal surface of a tooth formed by union of two triangular crests.
Synonym(s): transverse ridge [TA] .
References in periodicals archive ?
Its is distinct, however with its closest relative (dromedarii) in having without lateral projections of basis capituli, dorsal posterior margin angular and deeply concave, conscutum with deep and long cervical grooves but very short marginal grooves, postero-median groove does not reach the parma, and remain separated, paramedian festoons parma generally rectangular and broad, large punctuations on caudal and lateral fields but sparse, however small punctuations always dense, transverse ridges present in caudal area, broad, angle of paraparmal festoons eject, sub-anal plates smaller in size and a very short dorsal prolongation of the spiracular plates and not clear from the body of the plate.
3A): lateral ocelli and medial ocellus situated on an irregular-shaped broad black mark which extends to the vertex, not extending to the base of the antennae; median ocellus in a frontal position; distance between the lateral ocelli nearly twice the distance that separates them from the corresponding eyes; eyes salient and oblique, with discrete sub-ocular marks; long postclypeus dorsal portion, brownish and slightly arched; postclypeus face distinctly arched, ochre, with nine transverse ridges with black and light brown markings on both sides of the black medial furrow; black anteclypeus; rostrum ochre, long, with apex reaching the insertion of the hind femur.
4A): lateral ocelli and the medial ocellus situated on an irregular-shaped, broad black mark which stops short of the base of the antennae and vertex; median ocellus in frontal position; distance between the lateral ocelli nearly three times the distance that separates them from the corresponding eyes; eyes in short ellipsoids, wide, oblique, with subocular joined marks; postclypeus dorsal portion short and arched; postclypeus face arched, brown, with nine transverse ridges on both sides of the medial furrow; anteclypeus black; rostrum brownish, long, with apex reaching the level of the insertion of the hind trochanters.
The occlusal surfaces of some teeth in the specimen are exceptionally flat and possess low, thin transverse ridges that extend fully to the marginal area.
In the scales described herein the ridges are robust and blunt (however, the latter character might be connected with the state of preservation of scales); the grooves between the ridges are much wider, the transverse ridges on these scales not only bifurcate, but they also give off small short side branches.
First male gonopod with mesial side nearly convexe and subdistal shallow depression; margin fringed with minute, acute spinules on distal portion; lateral lobe wide, semicircular with distal portion rounded, directed distally; accessory lobe elongated with transverse ridges on caudal surface, internal subdistal protuberance and sinus, ending semi-acute distally (Fig.
bataensis shows transverse ridges on caudal surface, internal protuberance and sinus subdistal, ending semi-acute distally, meanwhile in N.
8, 10, 12, 14, 16, 18, 22) has parallel longitudinal ridges on the basal half and parallel transverse ridges on the apical half (which are continued by the circular ridges in the posterior face).
weberi because the former lacks transverse ridges on its head, has well-defined propodeal spines, and is larger in size.

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