Horolodectidae: a new family of unusual eutherians (Mammalia: Theria) from the Palaeocene of Alberta, Canada Author Scott, Craig S. text Zoological Journal of the Linnean Society 2019 2018-08-23 185 431 458 journal article 3273 10.1093/zoolinnean/zly040 685b49cb-9812-445d-842d-c5566f2de2cb 0024-4082 5715169 D50F5678-824D-477B-9DC9-F39DD40002B9 HOROLODECTIDAE FAM. NOV. Z o o b a n k L S I D . — u r n: l s i d: z o o b a n k. org:act: E0294887-BA5E-4A5D-BC17-A8B81D9390A0 Type genus: Horolodectes Scott, Fox & Webb, 2006 . Other genera: Ferrequitherium gen. nov. Etymology: In reference to Horolodectes . Occurrence: Earliest Tiffanian (Ti1) to Middle Tiffanian (Ti3) (Late Palaeocene) of Alberta , Canada . Diagnosis: Differs from other Eutheria in having unique combination of lower molars with talonids longer and wider than trigonids, protoconid arm of protocristid shorter than metaconid arm, and m3 with enlarged and closely approximated entoconid, entoconulid and hypoconulid positioned along the lingual margin of crown. Differs further in lower molars combining low trigonid that becomes increasingly anteroposteriorly compressed from m1 to m3, tall and trenchant paraconid lingual in position and closely positioned to metaconid, cristid obliqua contacting postvallid wall labial to protocristid notch and m1–2 hypoconulid anteroposteriorly compressed, with nearly flat basin-facing surface.