Fig. 2. Ungulate left proximal tarsal terminology. A in Postcranial remains of basal typotherian notoungulates from the Eocene of northwestern Argentina

Fig. 2. Ungulate left proximal tarsal terminology. A. Calcaneum; orientation used for description (A1), dorsal (A2), plantar (A3), lateral (A4), and medial (A5) views. B. Astragalus; orientation used for description (B1), dorsal (B2), plantar (B3), medial (B4), and lateral (B5) views. Abbreviations: acf, astragalocalcaneal facet; aflig, attachment for the fibuloastragalar ligament; ampt; astragalar medial plantar tuberosity; asth, astragalar head; astn, astragalar neck; atlig, attachment for the tibioastragalar ligament; be, "beak" (Cifelli 1983, 1993); cub, cuboidal facet; dfor, dorsal astragalar foramen; ect, ectal facet; epro, ectal protuberance; fib, fibular facet; gfhl, groove for the tendon of the flexor hallucis longus muscle (groove for deep digital flexor tendon in Cifelli 1983; groove for the tendon of muscle flexor fibularis in Szalay 1985); ifor, inferior astragalar foramen; ints, interarticular sulcus; lcre, lateral crest; mcre, medial crest; mfdb; muscle flexor digitorum brevis (attachment of flexor digitorum superficialis muscle in Cifelli 1983); mmt, facet for the medial malleolus of the tibia; nav, navicular facet; odc, oblique dorsal crest (nuchal crest or tibial stop); pfo, peroneal fossa; plt, plantar tubercle; psh, peroneal shelf; ptub, peroneal tubercle; qpm, attachment of the quadratus plantae muscle (Cifelli 1983); st, sustentaculum; sus, sustentacular facet; tg, tendinous groove (for the attachment of calcaneocuboid ligaments; Muizon et al. 1998); tr, tibial trochlea; trf, fossa trochlear; tub, tuber calcis; tubn, tuber neck.图2 有蹄类（Ungulate）左侧近端跗骨术语。A. 跟骨（calcaneum）：描述所用方位包括（A1）标准取向、（A2）背侧（dorsal）面、（A3）跖侧（plantar）面、（A4）外侧（lateral）面及（A5）内侧（medial）面。B. 距骨（astragalus）：描述所用方位包括（B1）标准取向、（B2）背侧面、（B3）跖侧面、（B4）内侧面及（B5）外侧面。 缩略词说明：acf：跟距关节面（astragalocalcaneal facet）；aflig：腓距韧带附着点（attachment for the fibuloastragalar ligament）；ampt：距骨内侧跖侧结节（astragalar medial plantar tuberosity）；asth：距骨头（astragalar head）；astn：距骨颈（astragalar neck）；atlig：胫距韧带附着点（attachment for the tibioastragalar ligament）；be："喙突"（引自Cifelli 1983、1993）；cub：骰骨关节面（cuboidal facet）；dfor：距骨背侧孔（dorsal astragalar foramen）；ect：外踝面（ectal facet）；epro：外踝隆起（ectal protuberance）；fib：腓骨关节面（fibular facet）；gfhl：拇长屈肌腱沟（groove for the tendon of the flexor hallucis longus muscle；Cifelli 1983中称指深屈肌腱沟，Szalay 1985中称腓骨屈肌肌腱沟）；ifor：距骨下孔（inferior astragalar foramen）；ints：关节间沟（interarticular sulcus）；lcre：外侧嵴（lateral crest）；mcre：内侧嵴（medial crest）；mfdb：短屈肌附着点（muscle flexor digitorum brevis；Cifelli 1983中称指浅屈肌附着点）；mmt：胫骨内踝关节面（facet for the medial malleolus of the tibia）；nav：舟骨关节面（navicular facet）；odc：斜背侧嵴（oblique dorsal crest，又称项嵴或胫骨止点）；pfo：腓骨肌窝（peroneal fossa）；plt：跖侧结节（plantar tubercle）；psh：腓骨肌嵴（peroneal shelf）；ptub：腓骨肌结节（peroneal tubercle）；qpm：足底方肌附着点（attachment of the quadratus plantae muscle；引自Cifelli 1983）；st：距骨载距突（sustentaculum）；sus：载距关节面（sustentacular facet）；tg：肌腱沟（用于跟骰韧带附着；引自Muizon等1998）；tr：胫骨滑车（tibial trochlea）；trf：滑车窝（fossa trochlear）；tub：跟结节（tuber calcis）；tubn：结节颈（tuber neck）。