Description
Original diagnosis after Underwood & Schlögl, 2013 [18090]: Extreme dignathic heterodonty present. Lower teeth with high cusp comprising nearly half of total tooth height. Cusp triangular with straight edges, inclined distally but not extending distally of short but well differentiated and semicircular distal heel. Tooth below cusp of similar height and width. Enameloid on labial face extends at least three quarters of distance to basal edge. A major labial foramen is present just above base of enameloid in centre of tooth, with a vertical groove below extending to root basal edge, forming a distinct notch on basal edge. A single smaller foramen is present behind main one. Major curved concavity marks mesial edge of enameloid below anterior part of cusp. Mesial profile of root with concavity below mesial end of cusp with swelling immediately below that. Tooth thickest at swollen horizontal ridge at base of enameloid on lingual face. Well developed concavity present below distal heel on lingual face. Upper teeth slender with single elongate cusp comprising over half of tooth height. Cusp weakly inclined distally and faintly sigmoidal. Cusp biconvex with continuous cut− ting edges that reach base of cusp. On labial face, base of cusp bifurcates into two short ridges on top of root lobes. These lobes have an acute edge and several short but sharp− edged ridges are present. Root low and flat−based, slightly asymmetrical, with short and rounded root lobes giving “heart−shaped” basal profile. Weak lingual protuberance is present with a large terminal foramen.

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