Search results for: Barbara De Kegel

Items from 1 to 10 out of 10 results

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Comparative anatomy and functional implications of variation in the buccal mass in coleoid cephalopods

Marjorie Roscian, Louise Souquet, Anthony Herrel, Theodore Uyeno, more

Journal of Morphology > 284 > 6 > n/a - n/a

In contrast to the well‐studied articulated vertebrate jaws, the structure and function of cephalopod jaws remains poorly known. Cephalopod jaws are unique as the two jaw elements do not contact one another, are embedded in a muscular mass and connected through a muscle joint. Previous studies have described the anatomy of the buccal mass muscles in cephalopods and have proposed variation in muscle...

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The anatomy of the head muscles in caecilians (Amphibia: Gymnophiona): Variation in relation to phylogeny and ecology?

Aurélien Lowie, Barbara De Kegel, Mark Wilkinson, John Measey, more

Journal of Anatomy > 242 > 2 > 312 - 326

In limbless fossorial vertebrates such as caecilians (Gymnophiona), head‐first burrowing imposes severe constraints on the morphology and overall size of the head. As such, caecilians developed a unique jaw‐closing system involving the large and well‐developed m. interhyoideus posterior, which is positioned in such a way that it does not significantly increase head diameter. Caecilians also possess...

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Regional differences in vertebral shape along the axial skeleton in caecilians (Amphibia: Gymnophiona)

Aurélien Lowie, Barbara De Kegel, Mark Wilkinson, John Measey, more

Journal of Anatomy > 241 > 3 > 716 - 728

Caecilians are elongate, limbless and annulated amphibians that, as far as is known, all have an at least partly fossorial lifestyle. It has been suggested that elongate limbless vertebrates show little morphological differentiation throughout the postcranial skeleton. However, relatively few studies have explored the axial skeleton in limbless tetrapods. In this study, we used μCT data and three‐dimensional...

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The evolutionary relationship between arm vertebrae shape and ecological lifestyle in brittle stars (Echinodermata: Ophiuroidea)

Mona Goharimanesh, Fereshteh Ghassemzadeh, Barbara De Kegel, Luc Van Hoorebeke, more

Journal of Anatomy > 240 > 6 > 1034 - 1047

Ophiuroidea are one of the most diverse classes among extant echinoderms, characterized by their flexible arms composed of a series of ossicles called vertebrae, articulating with each other proximally and distally. Their arms show a wide range of motion, important for feeding and locomotion, associated with their epizoic and non‐epizoic lifestyles. It remains to be explored to what degree the phenotypic...

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Body size miniaturization in a lineage of colubrid snakes: Implications for cranial anatomy

Mahdi Rajabizadeh, Dominique Adriaens, Barbara De Kegel, Aziz Avci, more

Journal of Anatomy > 238 > 1 > 131 - 145

As body size strongly determines the biology of an organism at all levels, it can be expected that miniaturization comes with substantial structural and functional constraints. Dwarf snakes of the genus Eirenis are derived from big, surface‐dwelling ancestors, considered to be similar to those of the sister genus Dolichophis. To better understand the structural implications of miniaturization on the...

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From yellow to silver: Transforming cranial morphology in European eel (Anguilla anguilla)

Jochem Baan, Jens De Meyer, Barbara De Kegel, Dominique Adriaens

Journal of Anatomy > 237 > 5 > 979 - 987

The European eel (Anguilla anguilla) has been extensively studied, especially because of its highly specialized migratory behaviour associated with substantial phenotypic transformations. During this migration, one of those transformations the eel undergoes is from yellow to silver eel, a process known as silvering. Although the cranial morphology during the earlier glass, elver and yellow eel stages...

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Is variation in tail vertebral morphology linked to habitat use in chameleons?

Allison M. Luger, Anouk Ollevier, Barbara De Kegel, Anthony Herrel, more

Journal of Morphology > 281 > 2 > 229 - 239

Chameleons (Chamaeleonidae) are known for their arboreal lifestyle, in which they make use of their prehensile tail. Yet, some species have a more terrestrial lifestyle, such as Brookesia and Rieppeleon species, as well as some chameleons of the genera Chamaeleo and Bradypodion. The main goal of this study was to identify the key anatomical features of the tail vertebral morphology associated with...

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Morphological and histological characterization of an ectopically mineralized structure in a gilthead sea bream Sparus aurata with opercular deformation

Nguyen Phuc Thuong, Edina Prondvai, Barbara De Kegel, Tania De Wolf, more

Journal of Fish Diseases > 42 > 9 > 1259 - 1270

In this study, we describe an abnormal ectopically mineralized structure (EMS) that was found inside the skull of a juvenile Sparus aurata that also showed a bilateral opercular deformation. The overall phenotype and tissue composition were studied using micro‐CT scanning and histological analyses. The ectopic structure occupies a large volume of the brain cavity, partially extruding into the gill...

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Musculoskeletal anatomy and feeding performance of pre‐feeding engyodontic larvae of the European eel (Anguilla anguilla)

Mathias Bouilliart, Jonna Tomkiewicz, Peter Lauesen, Barbara De Kegel, more

Journal of Anatomy > 227 > 3 > 325 - 340

Being part of the elopomorph group of fishes, Anguillidae species show a leptocephalus larval stage. However, due to largely unknown spawning locations and habitats of their earliest life stages, as well as their transparency, these Anguilla larvae are rarely encountered in nature. Therefore, information regarding the early life history of these larvae, including their exogenous feeding strategy and...

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Functional and evolutionary anatomy of the African suckermouth catfishes (Siluriformes: Mochokidae): convergent evolution in Afrotropical and Neotropical faunas

Tom Geerinckx, Barbara De Kegel

Journal of Anatomy > 225 > 2 > 197 - 208

Of those fishes scraping food off substrates and using head parts in substrate attachment for station‐holding, the catfish families Loricariidae, Astroblepidae and Mochokidae display the most dramatically adapted morphologies. Loricariidae and Astroblepidae, living in the Neotropical freshwaters, exclusively contain suckermouth catfish species, and their anatomy and head kinematics have already been...

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INFONA - science communication portal

Search results for: Barbara De Kegel

Comparative anatomy and functional implications of variation in the buccal mass in coleoid cephalopods

The anatomy of the head muscles in caecilians (Amphibia: Gymnophiona): Variation in relation to phylogeny and ecology?

Regional differences in vertebral shape along the axial skeleton in caecilians (Amphibia: Gymnophiona)

The evolutionary relationship between arm vertebrae shape and ecological lifestyle in brittle stars (Echinodermata: Ophiuroidea)

Body size miniaturization in a lineage of colubrid snakes: Implications for cranial anatomy

From yellow to silver: Transforming cranial morphology in European eel (Anguilla anguilla)

Is variation in tail vertebral morphology linked to habitat use in chameleons?

Morphological and histological characterization of an ectopically mineralized structure in a gilthead sea bream Sparus aurata with opercular deformation

Musculoskeletal anatomy and feeding performance of pre‐feeding engyodontic larvae of the European eel (Anguilla anguilla)

Functional and evolutionary anatomy of the African suckermouth catfishes (Siluriformes: Mochokidae): convergent evolution in Afrotropical and Neotropical faunas

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