Swiss Journal of Palaeontology

Table 2 Measurements of teeth of Tachyoryctoides (in mm)

From: Tachyoryctoides (Muroidea, Rodentia) fossils from Early Miocene of Lanzhou Basin, Gansu Province, China

	T. engesseri			T. minor	T. kokonorensis				Tachyoryctoides sp. I	Tachyoryctoides sp.		T. obrutschewi
	V 18176.1		V 18176.2	V 18177	V 6000			V 18178	V 18179	V 18181	V 18182	Sh 499	No. 17-(1)
	Holotype												Dashzeveg (1971)	Bendukidze et al. (2009)
	Left	Right			Left	Right
M1-3 L	13.1	13.3			12.4+	12.0+
M1 L	5.6	5.6			4.9	5.1			5.5					42.0–50.3
M1 W	4.7	4.5			4.7	4.6			4.0					34.7–41.6
M2 L	4.2	4.1	4.3		4.5	4.7								33.4
M2 W	4.8	4.7	4.5		4.5	4.4								34.0
M3 L	3.4	3.3		2.0	3.5	3.5								27.7
M3 W	4.3	4.1		2.4	3.8	3.8								31.5
m1-3 L		15.3			14.2	13.7				14.2^a	16.7^a	11.4	12
m1 L		4.8			4.8	4.7		4.8	5.0	4.3		3.6	4.5	36.6–42.4
m1 W		3.7		2.1+	3.8	3.7		3.6	3.8	3.2+		3.3	3.0	29.7–34.3
m2 L		4.6		2.8	4.2	4.2				3.9		3.2	4.0	37.9–38.2, 38.5
m2 W		4.4		2.4	4.2	4ca.						3.5	3.3	33.7–35.5, 35.8
m3 L		5.7			4.5	4.6						3.5	4.0	33.5, 34
m3 W		4.2		2.4+	3.7	3.7						3.3	3.0	31.2–32.8, 29
i2 H		5ca			5ca					5.8	5.4	2.8
i2 W		4			4.1					5.7	4.5	2.8
m1-2		9.1			9.4	9.1				8.5		7.3

	T. obrutschewi (?)		T. intermedius	T. pachygnathus	T. gigas	T. glikmani
	MgM-III/38	MgM-III/39	Sh 498	Sh 829	PIN 210-7	PIN 1978-1
	Kowalski (1974)				Argyropulo (1939)	Vorontsov (1963)
M1-3 L
M1 L
M1 W
M2 L
M2 W
M3 L
M3 W
m1-3 L	13.0			15.4	11.1
m1 L	3.8	3.9		5.1	3.8	3.6
m1 W	3.4	3.1		3.2	3.0
m2 L	4.0	3.5	3.6	4.1	3.8	3.5
m2 W	4.1	3.7	3.8	3.4	3.3
m3 L	4.2		3.7		3.5
m3 W	3.8		3.5		3.0
i2 H				5.7
i2 W			3.7	4.9
m1-2			7.6	9.4	7.9^b	7.2

H vertical distance between labial and lingual sides of incisor, L length, W width, ca circa
^a Alveolar length of m1-3
^bAfter Vorontsov (1963)

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