Figure 1. Dental terminology. A in A new Oligocene Ctenodactylinae (Rodentia: Mammalia) from Ulantatal (nei Mongol): new insight on the phylogenetic origins of the modern Ctenodactylidae

Figure 1. Dental terminology. A: Lower molars: Acd, anterior cingulid; Ad, anteroconid; Md, metaconid; PaMd, posterior arm of metaconid; Prd, protoconid; Etd, entoconid; Hyd, hypoconid; AaEd, anterior arm of entoconid; AaHp, anterior arm of hypoconid; Enld, entolophid = hypolophid; Hud, hypoconulid; MI, metalophulid I; MII, metalophulid II; Ecd, ectolophid; Mcd, mesoconid; Msld, mesolophid; Msd, mesostylid; MSSD, mesosynclinid; PSD, posterosynclinid; TB, trigonoid basin. B: Upper molars: Ac, anterocone; Al, anteroloph; anterior arm of hypocone; Psy, parastyle; Pa, paracone; PaP, posterior arm of protocone; AS, anterosyncline (= paraflexus); Pr, protocone; Prl, protoloph; En, endoloph; Me, metacone; Mel, metaloph; Cr, crochet; Acr, anticrochet; Mss, mesosyncline (= mesoflexus); Hy, hypocone; PaP, posterior arm of protocone; AaH, anterior arm of hypocone; Ps, posterosyncline; Psl, posteroloph; Ptc, posterocone.