Full resolution (JPEG) - On this page / på denna sida - On the Systematic Position of Æluropus Melanoleucus
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| Tooth formula: 123 1 .23456 123 1 123456 [1] | | | | | Tooth formula: 123 1 123456. 123 1 • 234567. | | | | | Tooth formula: 123 1 1(2)(3)456. 123 1 1(2)(3)4567. |
| Teeth (except p1) broad, stout, cusps strong, conical, cingulum well developed on the upper teeth, with tendency to form accessory cusplets. | | | | | | | | | | | Teeth (except i 1—2 1—2 and p1) broad, extremely stout, cusps very strong. There is a great tendency to form not only cingulum cusps, but also accessory cusplets in the valleys in between the ordinary cusps. | | | | | | | | | | | Premolars reduced, p 2—3 2—3 often wanting, molars stout, somewhat broadened, especially m2—3 and m2—3, which show a tendency to form cingulum cusps and accessory cusplets and folds between the ordinary cusps. |
| m2 broader than long, shorter than m1. | | | | m2 elongated, longer than m1. | | | | m2 elongated, longer than m1. |
| m3 absent. | | | m3 only a little reduced. | | | m3 somewhat reduced. |
| p3 quinque-cuspid, with a special root supporting the two inner cusps. | | | | | | p3 quinque-cuspid, but the two inner cusps are widely separated cingulum-cusps with no special root. | | | | | | p3 rudimentary, with one or three small cusps, often absent in adult animals. |
| p4 as large as m1, the two inner cusps (6—7 Winge, pr. and hy. Osborn) form more than ½ of the tooth, they are supported by a very strong root which is placed mainly under the anterior cusp. | | | | | | | | | | p4 smaller than m1, the inner cusps form only 1/3 of the tooth, only the posterior one is supported by the weak root and is thus the true “heel-cusp” (Winge l. c), the anterior is a cingulum-cusp with no root. (Bardenfleth l. c.) | | | | | | | | | | p4 reduced, much smaller than m1; the “heel-cusp” is placed far back, but connected with the anterior outer cusp (5 Winge) by a cingulum ridge which sometimes develops a small cusp. (c in pl. I 9.). |
| p3 strong, with one rather blunt cusp. | | | | p3 strong, with three sharp cusps. | | | | p3 reduced, often absent. |
| p4 quinque-cuspid. | | | | p4 tri-cuspid, with sharp edges. | | | | p4 reduced, with 1—3 irregular cusps. |
| Number of vertebræ 7 c., 14 d., 6l., 3s., 18 caud. | | | | | Number of vertebræ : 7 c., 13 d., 4l., 6s., 7 caud. (at least) (according to Gervais). | | | | | Number of vertebræ: 7 c., 14—15d., 6—5l, 4—6s., 9—10 caud. |
| Scapula small, the supra- scapular border almost not extending beyond the ridge running along the glenoid border. Glenoid and coracoid border somewhat diverging. | | | | | | | | | | | | The supra-scapular border of the scapula forms a very small area behind the upper 1/5 the ridge running along the glenoid border. Glenoid and coracoid border somewhat diverging. | | | | | | | | | | | | The supra-scapular border forms (in some species) a prominent area behind the ridge running along the glenoid border, this area occupying the upper half of the glenoid border (it is rather small in U. ornatus, Melursus a.o.). Glenoid and coraoid border often nearly parallel. |
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