5 per cent of basilar length); ventral surface of rostrum markedly concave dorsally, especially immediately behind upper incisors; nasals extend posterior to premaxillae. [Please select]
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The skull of the older animal has the longer nasals and more pronounced cranial ridges, which perhaps indicate a tendency toward _E. [Please select]
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The nasals are of moderate size and in broad contact with the ethmoid, but are separated from one another medially. [Please select]
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The available material from Tamaulipas can be divided into two groups on the basis of shape and proportion of the nasals. [Please select]
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In opossums from the southeast the nasals are truncate posteriorly and average 47. [Please select]
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4) per cent of the condylobasal length, whereas in specimens from elsewhere the nasals are acute posteriorly and average 50. [Please select]
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