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Ann MacLarnon

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Papers by Ann MacLarnon

Journal of Zoological Research

Organisms Diversity & Evolution, Oct 12, 2015

International Journal of Primatology, Jul 3, 2013

S. Karger AG eBooks, Apr 16, 2015

International Journal of Primatology, Apr 20, 2013

Bulletins et Mémoires de la Société d'Anthropologie de Paris, 2019

There is considerable variation in mid-late Pleistocene hominin paranasal sinuses, and in some ta... more There is considerable variation in mid-late Pleistocene hominin paranasal sinuses, and in some taxa distinctive craniofacial shape has been linked to sinus size. Extreme frontal sinus size has been reported in mid-Pleistocene specimens often classified as Homo heidelbergensis, and Neanderthal sinuses are said to be distinctively large, explaining diagnostic Neanderthal facial shape. Here, the sinuses of fossil hominins attributed to several mid-late Pleistocene taxa were compared to those of recent H. sapiens. The sinuses were investigated to clarify differences in the extent of pneumatisation within this group and the relationship between sinus size and craniofacial variation in hominins from this time period. Frontal and maxillary sinus volumes were measured from CT data, and geometric morphometric methods were used to identify and analyse shape variables associated with sinus volume. Some mid-Pleistocene specimens were found to have extremely large frontal sinuses, supporting pre...

Biology Letters, 2016

Selection is expected to favour the evolution of flexible metabolic strategies, in response to en... more Selection is expected to favour the evolution of flexible metabolic strategies, in response to environmental conditions. Here, we use a non-invasive index of basal metabolic rate (BMR), faecal thyroid hormone (T3) levels, to explore metabolic flexibility in a wild mammal inhabiting a highly seasonal, challenging environment. T3 levels of adult male Barbary macaques in the Atlas Mountains, Morocco, varied markedly over the year; temporal patterns of variation differed between a wild-feeding and a provisioned group. Overall, T3 levels were related to temperature, foraging time (linked to food availability) and intensity of mating activity, and were higher in the provisioned than in the wild-feeding group. In both groups, T3 levels began to increase markedly one month before the start of the mating season, peaking four to six weeks into this period, and at a higher level in the wild-feeding group. Our results suggest that while both groups demonstrate marked metabolic flexibility, resp...