510


Journal of Paleontology 92(3):506–522


Figure 3. Occlusal morphology of teeth in Sardolagus obscurus n. gen. n. sp. (1) left p3, DSG/URT-053/474; (2) left p3, DSG/URT-053/495; (3) right p3, DSG/URT-053/420, reversed; (4) left p3, DSG/URT-053/422; (5) left p3, DSG/URT-053/424; (6) left tooth row p3-m2, DSG/URT-053/476; (7) right p3, DSG/ URT-053/418, reversed; (8) left p3, DSG/URT-053/423; (9) left p3, DSG/URT-053/481; (10) right p3, DSG/URT-053/421, reversed; (11) right p3, DSG/ URT-053/419, reversed; (12) left p3, DSG/URT-053/494; (13) left p3, DSG/URT-053/475; (14) right P2, DSG/URT-053/498, reversed; (15) right P2, DSG/ URT-053/429, reversed; (16) left P2, DSG/URT-053/425; (17) left P2, DSG/URT-053/426; (18) left P2, DSG/URT-053/428; (19) left P2, DSG/URT-053/427; (20) right I1, DSG/URT-053/487, reversed; (21) left i1, DSG/URT-053/481; (22) left i1, DSG/URT-053/482; (23) left m3, DSG/URT-053/488; (24) left m3, DSG/URT-053/489; (25) left m3, DSG/URT-053/490; (26) right P3, DSG/URT-053/492, reversed; (27) right P4, DSG/URT-053/492, reversed; (28) right M2, DSG/URT-053/447, reversed; (29) right upper molariform, DSG/URT-053/500, reversed; (30) left upper molariform, DSG/URT-053/441.


Differential diagnosis.—The combination of advanced p3 (A1/PR3) and primitive P2 (absent/incipient hypoflexus, shal- low mesoflexus) discriminates Sardolagus obscurus n. gen. n. sp. from the Old World: (1) species of Hypolagus bearing p3 with A0/PR0+P2 with absent–medium hypoflexus and inci- pient–medium mesoflexus; (2) species of Serengetilagus bear- ing p3 with A0–1/PR0 + P2 with incipient–deep hypoflexus and shallow/medium mesoflexus; (3) Nuralagus rex bearing p3 with A0/PR0–1+P2 with absent hypoflexus and incipient/shallow mesoflexus; (4) species of Alilepus bearing p3 with A0/PR1– 2+P2 with absent/shallow hypoflexus and mesoflexus;


(5) species of Pliopentalagus bearing p3 with A1/PR1–2+P2 with medium/deep hypoflexus and mesoflexus; (6) species of Trischizolagus bearing p3 with A0–1/PR0–1–2+ P2 with med- ium/deep hypoflexus and mesoflexus; and (7) species of Lepus and Oryctolagus bearing p3 with A1/PR3+P2 with medium/ deep hypoflexus and mesoflexus.


Occurrence.—Sardinia (Italy), Monte Tuttavista fissure fillings X4, IVm, and VIIbs; early Pleistocene, MN17–MQ1, Capo Figari/Orosei 1 FSC of the Nesogoral FC and Orosei 2 FSC of the Microtus (Tyrrhenicola) FC.


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