Steneofiber depereti Mayet, 1908

Mörs, Thomas & Stefen, Clara, 2010, The castorid Steneofiber from NW Germany and its implications for the taxonomy of Miocene beavers, Acta Palaeontologica Polonica 55 (2), pp. 189-198 : 190

Steneofiber depereti Mayet, 1908

Figs. 2–6 .

Assigned subspecies: Steneofiber depereti depereti Mayet, 1908 , subspecies assignment Ginsburg, 1971; Steneofiber depereti caliodorensis Ginsburg, 1971 ; Steneofiber depereti janvieri Ginsburg, 1988 .

Material.—Left I: IPB−HaH 6415, 6416 (frag.), 6417 (frag.); right I: IPB−HaH 6418 (frag. juv.), 6429 (frag.); left DP4: IPB−HaH 5166; left P4: IPB−HaH 5088, 6374, 6375, 6378, 6380; right P4: IPB−HaH 6376; left M1/2: IPB−HaH 5102, 5086, 6382, 6383 (germ), 6384 (germ), 6385 (germ), 6387, 6388, 6401, 6442; right M1/2: IPB−HaH 5107, 5109, 6377, 6386; left M3: IPB−HaH 5165, 6389, 6390; right M3: IPBHaH 5101, 6391; left mandible with i (frag.), p4–m3: IPBHaH 5149; right mandible with i, m1–m3: IPB−HaH 5150; left mandible with i, p4–m2: IPB−HaH 5167; left mandible with i (frag.), p4–m3: IPB−HaH 6408; right mandible with i, p4–m3: IPB−HaH 6409; left mandible (frag.) with i: IPB−HaH 6422; left i: IPB−HaH 6415, 6419 (frag.), 6420 (frag.), 6421 (frag.), 6423 (frag.), 6425 (frag. juv.); right i: IPB−HaH 5103 (frag.), 5104 (frag.); left dp4: IPB−HaH 6392, 6394; right dp4: IPBHaH 6393; left p4: IPB−HaH 6397, 6440; right p4: IPB−HaH 5105, 6395, 6396; left m1/2: IPB−HaH 6443 (germ), 6399; right m1/2: IPB−HaH 5043, 5100, 5106, 6400; left m3: IPBHaH 6404; right m3: IPB−HaH 5110, 6402; for measurements see Table 1.

Figures

Fig. 2. Mandibles of the castorid Steneofiber depereti from the middle Miocene of Hambach 6C, northwestern Germany. A. IPB−HaH 6409 in lingual (A1) and labial (A2) views. B. IPB−HaH 5149 in labial (B1), lingual (B2), ventral (B3), and posterior (B4) views; B5, tooth row in occlusal view. C. IPB−HaH 5167, tooth row in occlusal view.

Fig. 3. Incisors of the castorid Steneofiber depereti from the middle Miocene of Hambach 6C, northwestern Germany. A. Tip of right I (IPB−HaH 6418) in oblique−lateral (A1) and lingual (A2) views. B. Tip of left I (IPB−HaH 6419) in lateral view.

Fig. 4. Occlusal pattern of lower cheek teeth of the castorid Steneofiber depereti from the middle Miocene of Hambach 6C, northwestern Germany. Mandibular tooth rows (A–E), deciduous teeth (F, G), premolars (H–J), molars (K–R); left p4–m3, IPB−HaH 6408 (A); right p4–m3, IPB−HaH 6409 (B); left p4–m3, IPB−HaH 5149 (C); right m1–m3, IPB−HaH 5150 (D); left p4–m2, IPB−HaH 5167 (E); left dp4, IPB−HaH 6392 (F); right dp4, IPB−HaH 6393 (G); right p4, IPB−HaH 6396 (H); right p4, IPB−HaH 6395 (I); left p4, IPB−HaH 6397 (J); left m1/2, IPB−HaH 6399 (K); right m1/2, IPB−HaH 5100 (L); right m1/2, slightly worn with a lingually open metaflexid, IPB−HaH 5043 (M); right m1/2, IPB−HaH 5106 (N); right m1/2, IPB−HaH 6400 (O); right m3, IPB−HaH 5110 (P); left m3, IPB−HaH 6404 (Q); right m3, IPB−HaH 6402 (R).

Fig. 5. Cheek teeth of the castorid Steneofiber depereti from the middle Miocene of Hambach 6C, northwestern Germany. DP4 in occlusal view: IPB−HaH 5166 (A); P4 in occlusal view: IPB−HaH 5088 (B), IPB−HaH 6374 (C), IPB−HaH 6376 (D), IPB−HaH 6380 (E); M1/2 in occlusal view: IPB−HaH 5102 (F), IPB−HaH 6377 (G), IPB−HaH 6383 (H), IPB−HaH 6384 (I), IPB−HaH 6385 (J), IPB−HaH 6401 (K); M3 in occlusal view: IPB−HaH 5101 (L), IPB−HaH 6390 (M), IPB−HaH 5165 (N); dp4 in occlusal view: IPB−HaH 6392 (O), IPB−HaH 6393 (P), IPB−HaH 6394 (Q); p4 in occlusal view: IPB−HaH 6396 (R), IPB−HaH 6397 (S), IPB−HaH 6440 (T); m1/2 in occlusal view: IPB−HaH 5043 (U); P4 in lingual view: IPB−HaH 6375 (V); M3 in labial view: IPB−HaH 5165 (W); dp4 in lingual view: IPB−HaH 6394 (X); p4 in labial view: IPB−HaH 6396 (Y), IPB−HaH 6440 (Z), IPB−HaH 6397 (AA); m1/2 in lingual view: IPB−HaH 5043 (AB).

Fig. 6. Occlusal pattern of upper cheek teeth of the castorid Steneofiber depereti from the middle Miocene of Hambach 6C, northwestern Germany. Deciduous tooth (A), premolars (B–G), molars (H–S); left DP4, IPB−HaH 5166 (A); right P4, IPB−HaH 6376 (B); left P4, IPB−HaH 6375 (C); left P4, IPB−HaH 6374 (D); left P4, IPB−HaH 6378 (E); left P4, IPB−HaH 5088 (F); left P4, IPB−HaH 6380 (G); left M1/2, IPB−HaH 6388 (H); left M1/2, IPB−HaH 6387 (I); right M1/2, IPB−HaH 6377 (J); left M1/2, IPB−HaH 6382 (K); right M1/2, IPB−HaH 5109 (L); right M1/2, IPB−HaH 5107 (M); right M1/2, IPB−HaH 6386 (N); left M1/2, IPB−HaH 6401 (O); right M3, IPB−HaH 6391 (P); left M3, IPB−HaH 6389 (Q); right M3, IPB−HaH 5101 (R); left M3, IPB−HaH 6390 (S).