Premaxillary‐maxillary suture fusion and anterior nasal tubercle morphology in the chimpanzee

Mooney, Mark P.; Siegel, Michael I.

doi:10.1002/ajpa.1330850408

Cited by 38 publications

(37 citation statements)

References 15 publications

(19 reference statements)

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“…These observations are in strong contrast to those of Mooney and Siegel (1991). Their Figure 1 shows a cranium with a fully patent PMS, which they assert is "typical" of adult male chimpanzee crania.…”

contrasting

confidence: 62%

Premaxilla in African apes: Comment on Mooney and Siegel (1991)

Simpson¹,

McCollum²

1993

American J Phys Anthropol

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contrasting

confidence: 62%

Premaxilla in African apes: Comment on Mooney and Siegel (1991)

Simpson¹,

McCollum²

1993

American J Phys Anthropol

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“…Given the early ontogenetic fusion of the premaxillary suture in humans, the contribution of nasal septal and premaxillary growth may be restricted to prenatal and early postnatal growth. Nevertheless, species-specific (e.g., Neandertal versus modern human) and population-specific variation in facial form begins to manifest early in ontogeny (Minugh-Purvis, 1988;Mooney and Siegel, 1991;Maureille and Bar, 1999;Williams, 2000Williams, , 2006Ponce de Léon andZollikofer, 2001, 2006;Viǒarsdottir et al, 2002;Krovitz, 2003). Moreover, although the nasal septum likely influences facial prognathism via premaxillary sutural growth, its influence on other aspects of facial growth (e.g., growth at other facial sutures, and anteroinferior displacement of the palate) is unknown.…”

Section: Discussionmentioning

confidence: 99%

Nasal Septal and Premaxillary Developmental Integration: Implications for Facial Reduction in Homo

Holton

Franciscus

Marshall

et al. 2010

The Anatomical Record

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The influence of the chondrocranium in craniofacial development and its role in the reduction of facial size and projection in the genus Homo is incompletely understood. As one component of the chondrocranium, the nasal septum has been argued to play a significant role in human midfacial growth, particularly with respect to its interaction with the premaxilla during prenatal and early postnatal development. Thus, understanding the precise role of nasal septal growth on the facial skeleton is potentially informative with respect to the evolutionary change in craniofacial form. In this study, we assessed the integrative effects of the nasal septum and premaxilla by experimentally reducing facial length in Sus scrofa via circummaxillary suture fixation. Following from the nasal septal-traction model, we tested the following hypotheses: (1) facial growth restriction produces no change in nasal septum length; and (2) restriction of facial length produces compensatory premaxillary growth due to continued nasal septal growth. With respect to hypothesis 1, we found no significant differences in septum length (using the vomer as a proxy) in our experimental (n ¼ 10), control (n ¼ 9) and surgical sham (n ¼ 9) trial groups. With respect to hypothesis 2, the experimental group exhibited a significant increase in premaxilla length. Our hypotheses were further supported by multivariate geometric morphometric analysis and support an integrative relationship between the nasal septum and premaxilla. Thus, continued assessment of the growth and integration of the nasal septum and premaxilla is potentially informative regarding the complex developmental mechanisms that underlie facial reduction in genus Homo evolution. Anat Rec, 294:68-78, 2011. V V C 2010 Wiley-Liss, Inc.

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“…Mooney and Siegel (1991:452-453) find a ''patent facial component of the premaxillary-maxillary suture'' in males and ''a greater than 50% fused facial premaxillary-maxillary suture'' in females. However, the observation of a complete patent anterior component of the incisive suture in the common chimpanzee as reported by Mooney and Siegel (1991) is highly questionable. Simpson and McCollum (1993) stress this point and mention three studies to support their view (Krogman, 1930;Ashley-Montagu, 1935;Schultz, 1948).…”

mentioning

confidence: 83%

Chimpanzee variation facilitates the interpretation of the incisive suture closure in South African Plio-Pleistocene hominids

Braga

1998

Am. J. Phys. Anthropol.

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For a better understanding of early hominid growth patterns, we need to compare skeletal maturation among humans and chimpanzees. This study provides new data on variation of the incisive suture closure in extant species to facilitate the understanding of growth patterns among South African Plio-Pleistocene hominids. The complete anterior closure of the incisive suture occurs early during human life, mostly before birth. In contrast, in chimpanzees a complete anterior closure occurs mostly after the eruption of either the first permanent molars (pygmy chimpanzees) or the third molars (common chimpanzees). The first aim of this study is to test whether the patterns of closure of both the anterior and palatal components of the incisive suture in chimpanzees accurately mirror their polytypism by investigating 720 museum specimens of known geographical origin. Then we use the data gleaned from the incisive suture closure in chimpanzees to determine whether there are different growth patterns among South African Plio-Pleistocene hominids and to interpret them. Results about the pattern of incisive suture closure are consistent with the differences among chimpanzees as revealed by molecular data. Thus, the variation in chimpanzee patterns of incisive suture closure facilitates the interpretation of morphology in South African fossil hominids. In Australopithecus (Paranthropus) robustus as compared to Australopithecus africanus, the complete anterior closure and, probably, the complete palatal closure of the incisive suture occurs during early life in the same way as they occur in humans. Moreover, the closure pattern observed on Stw 53, a supposed early Homo from Sterkfontein Member 5, is similar to that seen in A. africanus and in chimpanzees. Thus, with respect to the anterior component of the incisive suture, A. africanus and Stw 53 retain the primitive feature for which A. (P.) robustus and Homo share the derived character state. Finally, it is worth noting that the Taung child does not show the robust condition.

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Premaxillary‐maxillary suture fusion and anterior nasal tubercle morphology in the chimpanzee

Cited by 38 publications

References 15 publications

Premaxilla in African apes: Comment on Mooney and Siegel (1991)

Premaxilla in African apes: Comment on Mooney and Siegel (1991)

Nasal Septal and Premaxillary Developmental Integration: Implications for Facial Reduction in Homo

Chimpanzee variation facilitates the interpretation of the incisive suture closure in South African Plio-Pleistocene hominids

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