Skull ontogeny of Lycalopex culpaeus (Carnivora: Canidae): description of cranial traits and craniofacial sutures

Segura, Valentina

doi:10.1515/mammalia-2012-0028

Cited by 11 publications

(14 citation statements)

References 30 publications

(53 reference statements)

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“…The sequence classically accepted for placentals (vault, base, circum‐meatal, palatal, facial, cranio‐facial; Krogman, ) is variable for the sampled placentals and marsupials. Alternatively, we found that the interoccipital synchondroses at the base of the skull obliterate first in all mammalian groups starting by the basioccipito‐exoccipital synchondrosis and reveals a common pattern (Segura, ).…”

Section: Discussionmentioning

confidence: 80%

“…In most of the species previously examined (Brunner et al, ; Wilson and Sánchez‐Villagra, ; Sánchez‐Villagra, ; Bärmann and Sánchez‐Villagra, 2012; Goswami et al, ; Segura, ) a subgroup of sutures/synchondroses, that is, the interoccipital, the occipito‐sphenoid, the occipito‐parietal and the interparietal, were among the first five to close (with the exception of the occipito‐sphenoid in carnivorans) and greater variability was observed in the later sequence, which is consistent with this study.…”

Section: Discussionmentioning

confidence: 98%

“…Previous studies of timing of cranial suture closure in Placentalia dealt with primates (e.g., Krogman, ; Chopra, ; Wang et al, ; Cray et al, ; Flores and Barone, ), carnivorans (Schweiker, 1930; Brunner et al, ; Segura and Flores, ; Goswami et al, ; Segura, ), hystricognath rodents (Wilson and Sánchez‐Villagra, ), a bat (Giannini et al, ), peccaries (Herring, ), deer (Sánchez‐Villagra, ) and artiodactyls in general (Bärmann and Sánchez‐Villagra, 2012); afrotherians have been barely studied (e.g., Hoson et al, ) and previous works did not examine cranial suture closure in xenarthrans. Marsupial clades have barely been studied in this regard (e.g., Gardner, ; Flores et al, ).…”

Section: Introductionmentioning

confidence: 99%

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Timing of cranial suture closure in placental mammals: Phylogenetic patterns, intraspecific variation, and comparison with marsupials

Rager

Hautier

Forasiepi

et al. 2013

Journal of Morphology

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Used as markers of postnatal growth closure sequences of 22 ectocranial sutures and synchondroses were recorded in a sample of 1161 skulls belonging to 38 species from all major placental clades: Afrotheria, Xenarthra, Laurasiatheria and Euarchontoglires (Boreoeutheria). The maximum closure level, which is not significantly correlated to body mass, is higher in Afrotheria and Xenarthra than in Boreoeutheria. Only the basioccipito-basisphenoid and the basioccipito-exoccipital synchondroses close in all species sampled, the supraoccipito-exoccipital and the inter-parietal sutures do in most species. Parsimov retrieved more heterochronic shifts for Afrotheria and Xenarthra than for Boreoeutheria. The amount of intraspecific variation differs among the species sampled being high among xenarthran species and low among afrotherians. Specimens (162) representing 12 marsupial genera were also analysed. Placentals exhibit a larger number of suture closures than marsupials and in both groups the sutures at the base of the skull are the first to fuse starting with the basioccipito-exoccipital. ABSTRACT Used as markers of postnatal growth closure sequences of 22 ectocranial sutures and synchondroses were recorded in a sample of 1161 skulls belonging to 38 species from all major placental clades: Afrotheria, Xenarthra, Laurasiatheria and Euarchontoglires (Boreoeutheria). The maximum closure level, which is not significantly correlated to body mass, is higher in Afrotheria and Xenarthra than in Boreoeutheria. Only the basioccipito-basisphenoid and the basioccipito-exoccipital synchondroses close in all species sampled, the supraoccipito-exoccipital and the inter-parietal sutures do in most species. Parsimov retrieved more heterochronic shifts for Afrotheria and Xenarthra than for Boreoeutheria. The amount of intraspecific variation differs among the species sampled being high among xenarthran species and low among afrotherians. Specimens (162) representing 12 marsupial genera were also analysed. Placentals exhibit a larger number of suture closures than marsupials and in both groups the sutures at the base of the skull are the first to fuse starting with the basioccipitoexoccipital. J. Morphol. 275:125-140, 2014.Wiley Periodicals, Inc.

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Section: Discussionmentioning

confidence: 80%

Section: Discussionmentioning

confidence: 98%

Section: Introductionmentioning

confidence: 99%

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Timing of cranial suture closure in placental mammals: Phylogenetic patterns, intraspecific variation, and comparison with marsupials

Rager

Hautier

Forasiepi

et al. 2013

Journal of Morphology

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“…Highly specialized species need particular skull morphologies to capture, kill and process their food. Segura () described the ontogenetic changes over the first year in the skull of the culpeo, and identified that most changes were associated with increased ability to capture, kill and process a highly carnivorous diet (Eisenberg & Redford, ). Other specialists, such as bone‐crushing spotted hyenas (La Croix et al ., ) show similar marked ontogenetic changes in skull morphology due to their diet, and juveniles are at a distinct disadvantage compared to adults in their ability to process food.…”

Section: Discussionmentioning

confidence: 99%

Diet and bite force in red foxes: ontogenetic and sex differences in an invasive carnivore

et al. 2017

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Bite force is often used as a predictive indicator of an animal's feeding ecology, although the premise that there is a direct link between diet and cranial morphology can be difficult to test empirically. Studies that have examined this question tend to rely on generalizations of a species’ diet, and age and sex differences are rarely considered. Red foxes (Vulpes vulpes) are introduced predators in Australia, allowing large sample size collection through culling for comparison of skull morphology (size, morphometry, weight), demographics (age, sex) and diet (stomach contents). Over half (57%) of the 540 animals we sampled were juveniles (<1 year old; dispersing from their natal sites) and most variation in skull morphometry was driven by age; adults had significantly more robust skulls than juveniles, with greater estimated bite force. Sexual dimorphism (body mass and body length) was reflected in longer, heavier skulls of males. We also recorded significant sex and age differences in diet. Sheep carrion comprised 47–65% of diet volume; however, adult females ate less sheep but had more mice and invertebrates in their diet than males or juveniles of both sexes. This dietary separation for adult females does not appear to be directly due to estimated bite force constraints, but probably rather prey availability, which may reflect feeding behaviour and space use patterns. Juveniles (both sexes) showed as much consumption of sheep carrion as adult males, despite their lower estimated bite force than adults. This is the first study that directly compares ontogenetic and sex differences in the diet of a carnivore together with their cranial morphology and estimated bite force, and highlights limitations of inferring diet partitioning from skull morphology alone.

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“…A similar trend was previously detected in species studied with different methods (e.g. P. concolor , Segura & Flores, ; Giannini et al ., ; Lycalopex culpaeus , Segura & Prevosti, ; Segura, ; Canis latrans , La Croix et al ., 2011a, b; Crocuta crocuta , Tanner et al ., ). Using sexual maturity as a landmark to compare these species (Fig.…”

Section: Discussionmentioning

confidence: 99%

Cranial ontogeny in the Puma lineage,Puma concolor,Herpailurus yagouaroundi, andAcinonyx jubatus(Carnivora: Felidae): a three-dimensional geometric morphometric approach

2013

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The Puma lineage is a monophyletic group that includes three living species: Puma concolor, Herpailurus yagouaroundi, and Acinonyx jubatus. It has been analysed from ecological and taxonomic perspectives, but their cranial ontogeny has been poorly studied. In this study, we assessed the cranial shape and size variation through three‐dimensional geometric morphometric techniques, and explored the acquisition of definitive shape and size in relation to key life‐history events. Each species occupied different locations in the shape morphospace: A. jubatus and P. concolor showed shorter and wider skulls, with more expanded zygomatic arches, than H. yagouaroundi, which presented the most divergent pattern of change. Ontogeny was more similar between P. concolor and A. jubatus than between the closely related P. concolor and H. yagouaroundi. The evolution of ontogenetic change in the lineage seems to be more influenced by size. Changes detected between juvenile and adult skulls enhanced predatory skills, coincident with the change from a diet of milk to a carnivorous diet. Change patterns suggest that the skull is not morphologically conservative in the lineage, in contrast with other carnivores such as canids and hyaenids. The enlargement of the rostrum observed in some canids and the reinforcement of the bite mechanism of hyaenids were not detected in this group. © 2013 The Linnean Society of London

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Skull ontogeny of Lycalopex culpaeus (Carnivora: Canidae): description of cranial traits and craniofacial sutures

Abstract: Ontogenetic changes in the skull of

Cited by 11 publications

References 30 publications

Timing of cranial suture closure in placental mammals: Phylogenetic patterns, intraspecific variation, and comparison with marsupials

Timing of cranial suture closure in placental mammals: Phylogenetic patterns, intraspecific variation, and comparison with marsupials

Diet and bite force in red foxes: ontogenetic and sex differences in an invasive carnivore

Cranial ontogeny in the Puma lineage,Puma concolor,Herpailurus yagouaroundi, andAcinonyx jubatus(Carnivora: Felidae): a three-dimensional geometric morphometric approach

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