Neural organization of first optic neuropils in the littoral crab Hemigrapsus oregonensis and the semiterrestrial species Chasmagnathus granulatus
Crustaceans are among the most extensively distributed arthropods, occupying many ecologies and manifesting a great variety of compound eye optics; but in comparison with insects, relatively little is known about the organization and neuronal morphologies of their underlying optic neuropils. Most st...
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2009
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| Acceso en línea: | https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00219967_v513_n2_p129_Sztarker http://hdl.handle.net/20.500.12110/paper_00219967_v513_n2_p129_Sztarker |
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paper:paper_00219967_v513_n2_p129_Sztarker2023-06-08T14:45:00Z Neural organization of first optic neuropils in the littoral crab Hemigrapsus oregonensis and the semiterrestrial species Chasmagnathus granulatus Ecological constraints Eumalacostraca Evolution Visual processing animal cell animal tissue arthropod article cell structure cell type cellular distribution controlled study crab Crustacea ecology efferent nerve histochemistry male nerve cell neuropil nonhuman optic lobe priority journal species difference visual discrimination visual system Animals Brachyura Male Nerve Net Neurons Neuropil Species Specificity Visual Pathways Crustaceans are among the most extensively distributed arthropods, occupying many ecologies and manifesting a great variety of compound eye optics; but in comparison with insects, relatively little is known about the organization and neuronal morphologies of their underlying optic neuropils. Most studies, which have been limited to descriptions of the first neuropil-the lamina-suggest that different species have approximately comparable cell types, However, such studies have been limited with regard to the types of neurons they identify and most omit their topographic relationships. It is also uncertain whether similarities, such as they are, are independent of visual ecologies. The present account describes and compares the morphologies and dispositions of monopolar and other efferent neurons as well as the organization of tangential and smaller centrifugal neurons in two grapsoid crabs, one from the South Atlantic, the other from the North Pacific. Because these species occupy significantly disparate ecologies we ask whether this might be reflected in differences of cell arrangements within the most peripheral levels of the visual system. The present study identifies such differences with respect to the organization of centrifugal neurons to the lamina. We also identify in both species neurons in the lamina that have hitherto not been identified in crustaceans and we draw specific comparisons between the layered organization of the grapsoid lamina and layered laminas of insects. © 2009 Wiley-Liss, Inc. 2009 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00219967_v513_n2_p129_Sztarker http://hdl.handle.net/20.500.12110/paper_00219967_v513_n2_p129_Sztarker |
| institution |
Universidad de Buenos Aires |
| institution_str |
I-28 |
| repository_str |
R-134 |
| collection |
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) |
| topic |
Ecological constraints Eumalacostraca Evolution Visual processing animal cell animal tissue arthropod article cell structure cell type cellular distribution controlled study crab Crustacea ecology efferent nerve histochemistry male nerve cell neuropil nonhuman optic lobe priority journal species difference visual discrimination visual system Animals Brachyura Male Nerve Net Neurons Neuropil Species Specificity Visual Pathways |
| spellingShingle |
Ecological constraints Eumalacostraca Evolution Visual processing animal cell animal tissue arthropod article cell structure cell type cellular distribution controlled study crab Crustacea ecology efferent nerve histochemistry male nerve cell neuropil nonhuman optic lobe priority journal species difference visual discrimination visual system Animals Brachyura Male Nerve Net Neurons Neuropil Species Specificity Visual Pathways Neural organization of first optic neuropils in the littoral crab Hemigrapsus oregonensis and the semiterrestrial species Chasmagnathus granulatus |
| topic_facet |
Ecological constraints Eumalacostraca Evolution Visual processing animal cell animal tissue arthropod article cell structure cell type cellular distribution controlled study crab Crustacea ecology efferent nerve histochemistry male nerve cell neuropil nonhuman optic lobe priority journal species difference visual discrimination visual system Animals Brachyura Male Nerve Net Neurons Neuropil Species Specificity Visual Pathways |
| description |
Crustaceans are among the most extensively distributed arthropods, occupying many ecologies and manifesting a great variety of compound eye optics; but in comparison with insects, relatively little is known about the organization and neuronal morphologies of their underlying optic neuropils. Most studies, which have been limited to descriptions of the first neuropil-the lamina-suggest that different species have approximately comparable cell types, However, such studies have been limited with regard to the types of neurons they identify and most omit their topographic relationships. It is also uncertain whether similarities, such as they are, are independent of visual ecologies. The present account describes and compares the morphologies and dispositions of monopolar and other efferent neurons as well as the organization of tangential and smaller centrifugal neurons in two grapsoid crabs, one from the South Atlantic, the other from the North Pacific. Because these species occupy significantly disparate ecologies we ask whether this might be reflected in differences of cell arrangements within the most peripheral levels of the visual system. The present study identifies such differences with respect to the organization of centrifugal neurons to the lamina. We also identify in both species neurons in the lamina that have hitherto not been identified in crustaceans and we draw specific comparisons between the layered organization of the grapsoid lamina and layered laminas of insects. © 2009 Wiley-Liss, Inc. |
| title |
Neural organization of first optic neuropils in the littoral crab Hemigrapsus oregonensis and the semiterrestrial species Chasmagnathus granulatus |
| title_short |
Neural organization of first optic neuropils in the littoral crab Hemigrapsus oregonensis and the semiterrestrial species Chasmagnathus granulatus |
| title_full |
Neural organization of first optic neuropils in the littoral crab Hemigrapsus oregonensis and the semiterrestrial species Chasmagnathus granulatus |
| title_fullStr |
Neural organization of first optic neuropils in the littoral crab Hemigrapsus oregonensis and the semiterrestrial species Chasmagnathus granulatus |
| title_full_unstemmed |
Neural organization of first optic neuropils in the littoral crab Hemigrapsus oregonensis and the semiterrestrial species Chasmagnathus granulatus |
| title_sort |
neural organization of first optic neuropils in the littoral crab hemigrapsus oregonensis and the semiterrestrial species chasmagnathus granulatus |
| publishDate |
2009 |
| url |
https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00219967_v513_n2_p129_Sztarker http://hdl.handle.net/20.500.12110/paper_00219967_v513_n2_p129_Sztarker |
| _version_ |
1768546240351436800 |