{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,3,23]],"date-time":"2026-03-23T15:49:18Z","timestamp":1774280958573,"version":"3.50.1"},"reference-count":55,"publisher":"Walter de Gruyter GmbH","issue":"2","license":[{"start":{"date-parts":[[2005,2,8]],"date-time":"2005-02-08T00:00:00Z","timestamp":1107820800000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/www.karger.com\/Services\/SiteLicenses"},{"start":{"date-parts":[[2005,2,8]],"date-time":"2005-02-08T00:00:00Z","timestamp":1107820800000},"content-version":"tdm","delay-in-days":0,"URL":"https:\/\/www.karger.com\/Services\/SiteLicenses"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["IJFP"],"published-print":{"date-parts":[[2005,2,8]]},"abstract":"<jats:p>Schultz\u2019s rule (as reconstructed by Smith) states that there is a relationship between the pattern (or relative order) of eruption of molar versus secondary (replacement) teeth and the overall pace (or absolute timing) of growth and maturation. Species with \u2018fast\u2019 life histories (rapid dental development, rapid growth, early sexual maturation, short life spans) are said to exhibit relatively early eruption of the molars and late eruption of the secondary replacement teeth (premolars, canines, incisors), whereas species with \u2018slow\u2019 life histories are said to exhibit relatively late eruption of the molars and early eruption of the secondary dentition. In a recent review, B.H. Smith noted that primates with tooth combs might violate this rule because tooth combs tend to erupt early, regardless of the pace of life history. We show that exceptions to Schultz\u2019s rule among lemurs are not limited to the relative timing of eruption of the tooth comb. Rather, among lemurs, some species with extremely accelerated dental development exhibit a pattern of eruption of molars and of secondary teeth in direct opposition to the expectations of Schultz\u2019s rule. We focus particularly on the pattern (order) and pace (absolute timing) of dental development and eruption in Avahi and Lepilemur \u2013 two relatively small, nocturnal folivores with rapid dental development. These taxa differ markedly in their eruption sequences (the premolars erupt after M2 and M3 in Lepilemur but not Avahi ). We offer an explanation for the failure of Schultz\u2019s rule to predict these differences. Schultz\u2019s rule presumes that eruption timing is dependent on the size of the jaw and that, therefore, molar crown formation and eruption will be delayed in species with slow-growing jaws. We show that a variety of processes (including developmental imbrication) allows the crowns of permanent teeth to form and to erupt into jaws that might appear to be too small to accommodate them.<\/jats:p>","DOI":"10.1159\/000083615","type":"journal-article","created":{"date-parts":[[2005,3,16]],"date-time":"2005-03-16T09:57:17Z","timestamp":1110967037000},"page":"77-99","source":"Crossref","is-referenced-by-count":40,"title":["Schultz\u2019s Unruly Rule: Dental Developmental Sequences and Schedules in Small-Bodied, Folivorous Lemurs"],"prefix":"10.1163","volume":"76","author":[{"given":"Laurie R.","family":"Godfrey","sequence":"first","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Karen E.","family":"Samonds","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Patricia C.","family":"Wright","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Stephen J.","family":"King","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"374","reference":[{"key":"sref_1_187","doi-asserted-by":"crossref","first-page":"297","DOI":"10.1007\/s12064-002-0016-5","volume":"121","author":"BinindaEmonds ORP","year":"2002","journal-title":"Theory in Bioscience"},{"key":"sref_2_188","doi-asserted-by":"crossref","first-page":"366","DOI":"10.1671\/0272-4634(2002)022[0366:NPPFTC]2.0.CO;2","volume":"22","author":"Bloch JI","year":"2002","journal-title":"Journal of Vertebrate Paleontology"},{"key":"sref_3_189","first-page":"3","volume":"1","author":"CharlesDominique P","year":"1971","journal-title":"Terre et Vie"},{"key":"sref_4_190","unstructured":"Della Serra O (1952). 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