2016
DOI: 10.1186/s12862-016-0690-4
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Owenia fusiformis – a basally branching annelid suitable for studying ancestral features of annelid neural development

Abstract: BackgroundComparative investigations on bilaterian neurogenesis shed light on conserved developmental mechanisms across taxa. With respect to annelids, most studies focus on taxa deeply nested within the annelid tree, while investigations on early branching groups are almost lacking. According to recent phylogenomic data on annelid evolution Oweniidae represent one of the basally branching annelid clades. Oweniids are thought to exhibit several plesiomorphic characters, but are scarcely studied - a fact that m… Show more

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Cited by 45 publications
(115 citation statements)
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References 64 publications
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“…The position and configuration of the brain vary among annelids, most commonly consisting of a subepidermal dorsal neuropil with peripheral perikarya, subdivided into discrete clusters or lobes [1, 5, 6, 9, 10], but occasionally situated intraepidermally (e.g., [11, 12]) and ventrally (e.g., [1315]), or anteriorly [13], or having a uniform compact morphology without apparent compartmentalization [11, 12, 1626]. Despite this morphological diversity, the underlying molecular patterns of neural-related genes that are evolutionarily conserved in Protostomia (e.g., Mollusca, Platyhelminthes, Nemertea, Nematoda, Arthropoda and Brachiopoda [1626]) and Deuterostomia (e.g., Hemichordata and Chordata, e.g., [9, 2730]) have been analyzed only in a handful of annelid taxa [23, 3135].…”
Section: Introductionmentioning
confidence: 99%
“…The position and configuration of the brain vary among annelids, most commonly consisting of a subepidermal dorsal neuropil with peripheral perikarya, subdivided into discrete clusters or lobes [1, 5, 6, 9, 10], but occasionally situated intraepidermally (e.g., [11, 12]) and ventrally (e.g., [1315]), or anteriorly [13], or having a uniform compact morphology without apparent compartmentalization [11, 12, 1626]. Despite this morphological diversity, the underlying molecular patterns of neural-related genes that are evolutionarily conserved in Protostomia (e.g., Mollusca, Platyhelminthes, Nemertea, Nematoda, Arthropoda and Brachiopoda [1626]) and Deuterostomia (e.g., Hemichordata and Chordata, e.g., [9, 2730]) have been analyzed only in a handful of annelid taxa [23, 3135].…”
Section: Introductionmentioning
confidence: 99%
“…The conserved receptor ligand pair in P. dumerilii and T. transversa stands in contrast to the various actions that FMRFamide can have in trochozoans. Several studies on trochozoan larvae have shown that FMRFamide like immuno-reactive nerves can be associated with several structures in a single animal and often include a combination of the apical organ, ciliary bands and the musculature, which would suggest different regulatory roles [39][40][41][66][67][68]. However, in this context it is important to mention that antibodies against FMRFamide strongly cross-react with other peptides ending in RFamide, even within the same specimen [69,70].…”
Section: Farp Receptor-ligand Pair Was Redeployed Several Times Durinmentioning
confidence: 99%
“…So far only one study has shown a muscular effect of FMRFamide in larvae, which describes a twitching of the ciliated velum of Tritia obsoleta larvae [24]. Many immunohistochemical analyses on trochozoan larvae show FMRFamide-like immuno-reactivity associated with muscles or ciliary bands [39][40][41] but experimental data are mostly missing.…”
Section: Introductionmentioning
confidence: 99%
“…This stage called 'trochophora larva' is the name giving characteristic of the spiralian taxon that is referred to as Trochozoa (27)(28)(29)(30)(31). While antibodies against neuropeptides (usually FMRFamide) have been used widely to describe neuroanatomies of trochozoan larvae (32)(33)(34)(35)(36)(37)(38)(39)(40), there are comparably few studies that investigated the behavioral effect of neuropeptides in such larvae (41)(42)(43)(44)(45) and neither behavioral nor immunohistochemical studies investigated the EP/CCHamide in trochozoan larvae.…”
Section: Introductionmentioning
confidence: 99%