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Hystricopini
Taxonomy
Subtaxa
Synonymy list
| Year | Name and author |
|---|---|
| 2017 | Hystricopini Korth p. 250 |
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If no rank is listed, the taxon is considered an unranked clade in modern classifications. Ranks may be repeated or presented in the wrong order because authors working on different parts of the classification may disagree about how to rank taxa.
Tr. †Hystricopini Korth 2017
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G. †Priusaulax Korth and Bailey 2006
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†Priusaulax browni Korth and Bailey 2006
†Priusaulax senrudi Wood 1945
†Priusaulax wilsoni Korth 2017
Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| W. W. Korth 2017 | Derived features shared with castorines, castoroidines, and palaeocastorines: P3 lacking; P4/p4 larger than molars; upper tooth rows slightly diverge posteriorly; upper diastema arched; posterior palatine foramina intersected by maxillary-palatine suture; palatal surface dis- tinctly grooved; length of incisive foramen less than 30% length of upper diastema; loss of stapedial foramen in au- ditory bulla. Derived characters shared with castoroidines: larger size (compared to contemporaneous species); angle of dentary laterally expanded with flattened ventral surface, mandibular condyle medial to angle and ascending ramus (= zig-zag pattern). Retained primitive features of castorids: cheek teeth mesodont in crown-height; occlusal morphology of cheek teeth with single, persistent re-entrant (lingual hypoflexus on upper; buccal hypoflexid on lowers) and three persistent, transversely oriented fossettes (-ids); jugal bone contacts lacrimal at its anterior end; enamel surface of incisors smooth, and unornamented; nasal bones extend more posteriorly than premaxillaries on dorsal surface of cranium; rostrum elongated; upper incisors slightly procumbent. |