Osteology Of The Middle Eocene Ceratomorph Hyrachyus Modestus (Mammalia, Perissodactyla) Author Bai, Bin Author Meng, Jin Author Wang, Yuan-Qing Author Wang, Hai-Bing Author Holbrook, Luke text Bulletin of the American Museum of Natural History 2017 2017-06-09 2017 413 1 68 http://www.bioone.org/doi/10.1206/0003-0090-413.1.1 journal article 10.1206/0003-0090-413.1.1 0003-0090 4612938

TABLE 10 Measurements of metacarpals (Mc) of Hyrachyus modestus (AMNH FM 12664) (mm) APD = anteroposterior distance; DAF = distal articular facet.

	Mc II	Mc III	Mc IV	Mc V
1. Total length	71.0	78.5	66.3	49.7
2. Proximal end, width	8.5	14.3	?	8.3
3. Proximal end, APD	15.7	?	?	9.9
4. Distal end, width	12.4	17.2	12.5	10.6
5. DAF, width	11.2	13.9	10.5	7.9
6. Distal end, APD	11.3	11.1	12.1	8.8
7. Width at midshaft	9.7	11.7	9.3	7.7
8. APD at midshaft	6.8	7.6	6.5	5.1
Ratio (%)
2:1	12.0	18.2	?	16.7
4:1	17.5	21.9	18.8	21.2
2:3	54.4	?	?	84.0
5:6	99.6	125.0	86.2	90.2