Szabó János szerk.: Fragmenta Mineralogica Et Palaentologica 23. 2005. (Budapest, 2005)

^ buccal lingual • Figure 2 — Terminology of the lower molars of anomalomyines. Figured is Anomalomys gaudryi from Neudorf. — C o n i d s: Acd = anteroconid; Ecd = entoconid; Hcd = hypoconid; Held = hypoconulid; Mtcd = metaconid; Mscd = mesoconid; Prcd = protoconid. — Lophids: Aldb = anterolophid buccal; Aldi = anterolophid lingual; Ecld = ectolophid; Eclda = ectolophid anterior; Ecldp = ectolophid posterior; Ecmld = ectomesolophid; Hid = hypolophid; Msld = mesolophid; Mtld = metalophulid; Mtlda = metalophulid anterior; Mtldp = metalophulid posterior; Postld = posterolophid; Poststd = posterostylid; Prld = protolophid. — S i n i d s: Asd = anterosinid, Ecmsd = ectomesosinid; Hsd = hyposinid; Msda — mesosinid anterior; Msdb = mesosinid buccal; Msdl = mesosinid lingual; Msdp = mesosinid posterior; Postsd = posterosinid; Prsd = protosinid. Ontogenetic age categories of anomalomyines The more derived anomalomyines have hypselodont molars, which permit the recognition of ontogenetic age categories. On the basis of the lower first molar, the following age categories can be recognized (Figure 3): Age Category 1 — The crown is high, with poorly developed roots. The anterior part of the occlusal surface is concave. The anteroconid-metaconid complex includes two or three enamel lakes. The remainder of the enamel folds is visible and has no enamel lakes. Age Category 2 — The crown height is at its maximum at this stage-of-wear. The anteroconid-metaconid complex includes one enamel lake and the tooth's shape is similar to that found in Age Category 1. No enamel lakes are present on the remainder of the occlusal surface. Age Category 3 — The crown height is lower than in the previous stages and the roots are well developed for