Sorex runtonensis Hinton, 1911

(Fig. 4)

Material – 1 left corpus mandibulae with condyle; 1 left mandible fragment with I 1 and A 2 -M 3 (M 1: L = 1.34, W = 0.76; M 2: L = 1.16, W = 0.68); 1 left mandible fragment with M 1 -M 3 (M 1: L = 1.50, W = 0.80; M 2: L = 1.30, W = 0.78); 1 left mandible fragment with M 1 -M 2 (M 1: L = 1.56, W = 0.84; M 2: L = 1.32, W = 0.80); 1 incomplete left mandible with I 1 fragment and A 2 -M 2 (M 1: L = 1.48, W = 0.80; M 2: L = 1.32, W = 0.76); 1 left mandible fragment with A 2 -M 2 (M 1: L = 1.54, W = 0.84; M 2: L = 1.36, W = 0.76); 1 right I 1 (L = 3.04, H = 0.78); 2 left P 4 (LL = 1.08, BL = 1.40, W = 1.68; LL = 0.96, BL = 1.56, W = 1.62); 1 left M 1 (LL = 1.45, BL = 1.44, AW = 1.56, PW = 1.73); 3 right M 1 (LL = 1.32, BL = 1.33, AW = 1.44, PW = 1.52; LL = 1.44, BL = 1.44, AW = 1.48, PW = 1.64; LL = 1.40, BL = 1.36, AW = 1.52, PW = 1.66); 1 right M 1 and 1 right M 2 fragments.

Description – The teeth are pigmented with orange to red colour. The pentagonal P 4 has a well-developed parastyle and protocone. The protocone is placed in the central part of the anterior side of the tooth. The subquadrate M 1 has well-developed hypocone and indistinct metaloph.The posterior emargination of P 4 and M 1 is moderately developed. The coronoid process is tall and leans forwards; its anterior margin is concave. The deep external temporal fossa of coronoid process runs along the posterior border of the process. The coronoid spicule is well-developed. The internal temporal fossa is high and triangular. I

1 is tricuspulate. M

1 is bigger than M 2. M 1 buccal cingulum is undulate while it is straight in M 2 and M 3. The molars are characterized by high entoconid crests. M 3 is unreduced with basined talonid.