trapeziform


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Related to trapeziform: Trapes

trapeziform

[trə′pē·zə‚fȯrm]
(biology)
Having the form of a trapezium.
References in periodicals archive ?
Head including eyes narrower than pronotum, vertex trapeziform, with margins well defined.
This species is identified as new rather than the male of Lysiteles amoenus (Ono 1980) from Taiwan, because the carapace is trapeziform, and the posterior eye row is longer than the anterior row (Fig.
Prepops is recognized by the following characteristics: coloration mostly black or black and redor orange; head vertical, gula short; pronotum trapeziform with lateral margins rounded and collar prominent with posterior sulcus interrupted laterally, not reaching the anterior coxal cleft (Kelton, 1980; Ferreira and Coelho, 2006).
Wider than long, trapeziform, strongly declivent; collar wide; frontal angles obtuse, not exposed; humeral angles projected on large, slender and acute spine, directed outward, and slightly backward; anterior border smooth, weakly curved; anterolateral borders obliquely straight, smooth, not emarginated; posterolateral borders straight, with upper third stout, tuberculate; triangular process broad, laminate; posterior border straight, smooth; calli flat, entire, separated at midline by two deep pits, each lateral to midpoint (Fig.
The color of the stalks passing into the segment bases, quadrangulate to trapeziform median segments with rounded apices, glabrous rachises, as well as glabrous segments on both surfaces distinguish this species.