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- W4249760179 abstract "Abstract In over 150 years of nervous system research on Branchiopoda, numerous detailed descriptions are available. Branchiopods constitute one of the morphologically most disparate taxa in Crustacea, but the nervous system architecture appears to be fairly homogeneous across the taxon. As in all other crustaceans, the branchiopod brain consists of a proto-, deuto-, and tritocerebrum and is connected posteriorly to the ventral nerve cord. Proto- and deutocerebra are often completely confluent and are both connected posteriorly with the tritocerebrum by circumoral connectives. Each brain part is connected to sensory or mechanosensory organs by nerves (antennule, antenna) or tracts (compound eyes), and possesses a discrete centre for integrative processing (central body, optical neuropils, deutocerebral lobes). The presence of olfactory glomeruli is still uncertain; hemiellipsoid bodies, however, appear to be absent. The ventral nerve cord consists of a well-separated pair of ganglia in each appendage-bearing segment, which are interconnected by two parallel longitudinal connectives and two transversal commissures. Laterally, each ganglion projects nerves into the appendages and also sends nerves into the integument and the visceral body cavity. At the posterior end, two longitudinal neurite bundles extend into the telson and innervate the proctodaeum and the dorsal setae. Investigations into neuro-active substances have revealed a uniform distribution pattern of individually identifiable neurons (e.g. serotonin-like immunoreactive neurons). Although the phylogenetic position of Branchiopoda within Tetraconata is still uncertain, it appears more likely that the branchiopod brain is secondarily simplified instead of being primitive. It is uncertain whether or not this also concerns the ventral nerve cord." @default.
- W4249760179 created "2022-05-12" @default.
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- W4249760179 date "2015-12-01" @default.
- W4249760179 modified "2023-09-25" @default.
- W4249760179 title "Branchiopoda" @default.
- W4249760179 doi "https://doi.org/10.1093/acprof:oso/9780199682201.003.0043" @default.
- W4249760179 hasPublicationYear "2015" @default.
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