An architectonic comparison of the ventrobasal complex of two megachiropteran and one microchiropteran bat: implications for the evolution of Chiroptera
| Autor: | Rita Collins, Marcello G. P. Rosa, Paul R. Manger |
|---|---|
| Rok vydání: | 2001 |
| Předmět: |
Ventral Thalamic Nuclei
biology Physiology Thalamus Arcuate Nucleus of Hypothalamus Macroderma gigas Anatomy Ventrobasal complex biology.organism_classification Somatosensory system Biological Evolution Sensory Systems Pteropus poliocephalus Nyctimene robinsoni Archonta Species Specificity Chiroptera Flying fox (fish) Animals Phylogeny Lateral Thalamic Nuclei |
| Zdroj: | Somatosensorymotor research. 18(2) |
| ISSN: | 0899-0220 |
| Popis: | The architectonic features of the thalamic ventrobasal complex (Vb) of two species of Megachiropteran (Grey-headed flying fox, Pteropus poliocephalus, and the Eastern tube-nosed bat, Nyctimene robinsoni) are compared with those of a Microchiropteran (Australian ghost bat, Macroderma gigas). The somatosensory system was chosen for comparison as it represents a sensory system that has undergone analogous modifications in both Chiropteran lineages (the evolution of the wing). The components of Vb were examined as there are taxon-specific features in this region of the brain. Within the Megachiropteran Vb, four subnuclei were recognized: the ventral posterior medial (VPM), the ventral posterior lateral (VPL), the ventral posterior inferior (VPI), and the basal ventral medial (VMb). In the ghost bat only VPM and VPL were identified with certainty. No VPI was evident in the ghost bat, however a putative VMb was observed. Vb of the ghost bat also lacked the arcuate lamina, which distinguishes VPM from VPL in the Megachiropterans and many other mammals. These taxon-specific differences lend support to the proposal that the order Chiroptera has a diphyletic origin. |
| Databáze: | OpenAIRE |
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