Distribution and evolution of serotonin-like immunoreactive cells in Thaliacea (Tunicata)

Braun, K.-P.; Stach, Thomas

doi:10.1007/s00435-018-0416-9

Cited by 3 publications

(12 citation statements)

References 36 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“… Serotonin‐lir in the brain of adult specimens: (0) absent; (1) present. Serotonin‐lir in the brain has been detected only in investigated outgroup species (Baumgarten et al., ; Sakharov and Salimova, ; Holland and Holland, ; Candiani et al., ; Barreiro‐Iglesias et al., ), Salpida, Doliolida (Braun and Stach, 2018) and O. fusiformis (Stach, ), but could not be detected in other tunicate species examined. Serotonin‐lir in the peripharyngeal band: (0) absent; (1) present. Serotonin‐lir in the peripharyngeal band is described for all Thaliacea, all examined ascidian species, and lampreys (Sakharov and Salimova, ; Barreiro‐Iglesias et al., ; Braun and Stach, , 2018; Fig.…”

Section: List Of Charactersmentioning

confidence: 99%

“…It contains glandular cells, ciliated cells and produces mucus involved in feeding. In Pyrosomatida and ascidians serotonin‐lir cells are located in the endostyle (Braun and Stach, , 2018; Fig. c,h,l,p; Fig.…”

Section: List Of Charactersmentioning

confidence: 99%

“…The retropharyngeal band limits the branchial basket to the posterior and is a conspicuous ciliated band. Information on character distribution is found in Braun and Stach (, ); see also Fig. b,e,n. Serotonin‐lir in the oesophagus: (0) absent; (1) present.…”

Section: List Of Charactersmentioning

confidence: 99%

“…The oesophagus is the part of the intestinal tract that connects the branchial basket with the stomach. Serotonin‐lir cells are present in the esophagus of Thaliacea and ascidians (Braun and Stach, , 2018; Figs d,i,m,r and d,h,m). Serotonin‐lir in the gastrointestinal tract: (0) absent; (1) present. The gastrointestinal tract is the part of the intestinal tract posterior to the esophagus.…”

Section: List Of Charactersmentioning

confidence: 99%

“…The characters were chosen to allow for hypotheses of primary homology hypotheses across the entire diversity of tunicate taxa. Among these are characters traditionally used in tunicate taxonomy, such as characteristics of the branchial basket or the morphology of the gonads, but also characters recently compiled in the authors’ own research, such as the kinds and distribution of serotonergic cells in the nervous system (see also Braun and Stach, , 2018). Besides being an independent source of evidence for phylogenetic analyses, homology hypotheses of morphological characters are quintessential for any understanding of organismal evolutionary changes beyond the branching pattern of a cladogram.…”

Section: Introductionmentioning

confidence: 99%

See 4 more Smart Citations

Phylogenetic analysis of phenotypic characters of Tunicata supports basal Appendicularia and monophyletic Ascidiacea

2019

Self Cite

View full text Add to dashboard Cite

With approximately 3000 marine species, Tunicata represents the most disparate subtaxon of Chordata. Molecular phylogenetic studies support Tunicata as sister taxon to Craniota, rendering it pivotal to understanding craniate evolution. Although successively more molecular data have become available to resolve internal tunicate phylogenetic relationships, phenotypic data have not been utilized consistently. Herein these shortcomings are addressed by cladistically analyzing 117 phenotypic characters for 49 tunicate species comprising all higher tunicate taxa, and five craniate and cephalochordate outgroup species. In addition, a combined analysis of the phenotypic characters with 18S rDNA-sequence data is performed in 32 OTUs. The analysis of the combined data is congruent with published molecular analyses. Successively up-weighting phenotypic characters indicates that phenotypic data contribute disproportionally more to the resulting phylogenetic hypothesis. The strict consensus tree from the analysis of the phenotypic characters as well as the single most parsimonious tree found in the analysis of the combined dataset recover monophyletic Appendicularia as sister taxon to the remaining tunicate taxa. Thus, both datasets support the hypothesis that the last common ancestor of Tunicata was free-living and that ascidian sessility is a derived trait within Tunicata. "Thaliacea" is found to be paraphyletic with Pyrosomatida as sister taxon to monophyletic Ascidiacea and the relationship between Doliolida and Salpida is unresolved in the analysis of morphological characters; however, the analysis of the combined data reconstructs Thaliacea as monophyletic nested within paraphyletic "Ascidiacea". Therefore, both datasets differ in the interpretation of the evolution of the complex holoplanktonic life history of thaliacean taxa. According to the phenotypic data, this evolution occurred in the plankton, whereas from the combined dataset a secondary transition into the plankton from a sessile ascidian is inferred. Besides these major differences, both analyses are in accord on many phylogenetic groupings, although both phylogenetic reconstructions invoke a high degree of homoplasy. In conclusion, this study represents the first serious attempt to utilize the potential phylogenetic information present in phenotypic characters to elucidate the inter-relationships of this diverse marine taxon in a consistent cladistic framework.

show abstract

Section: List Of Charactersmentioning

confidence: 99%

Section: List Of Charactersmentioning

confidence: 99%

Section: List Of Charactersmentioning

confidence: 99%

Section: List Of Charactersmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Phylogenetic analysis of phenotypic characters of Tunicata supports basal Appendicularia and monophyletic Ascidiacea

2019

Self Cite

View full text Add to dashboard Cite

show abstract

Comparative Neurobiology of Biogenic Amines in Animal Models in Deuterostomes

et al. 2020

View full text Add to dashboard Cite

We review the occurrence of biogenic amines and their potential role as neurotransmitters in the nervous system of three groups of invertebrate deuterostomes: tunicates, cephalochordates, and echinoderms. In addition to an overview of biogenic amines in each subphylum, we focus on a few species, including the sea squirts Ciona intestinalis, C. robusta, C. savignyi, and Phallusia mammillata (tunicates), the lancelets Branchiostoma lanceolatum and Branchiostoma floridae (cephalochordates), and the sea urchin Strongylocentrotus purpuratus (echinoderms). We chose these species as they are the most studied invertebrate deuterostomes in the field of evolutionary developmental biology (EvoDevo). Providing a comparative picture of the expression and role of neurotransmitters in deuterostomes will contribute to understanding the evolution of these neural signaling systems. Such an approach represents a new frontier of comparative neuroanatomy and neurobiology, and a prerequisite to uncover the homology of neuronal structures and circuits in deuterostomes with such diverse body plan organization and complexity.

show abstract

Serotonin system in tunicates: insight from morphological and molecular approaches

Pennati,

Blumer,

Mercurio

et al. 2024

Front. Ecol. Evol.

View full text Add to dashboard Cite

Serotonin (5 hydroxytryptamine, 5-HT) is a biogenic amine of ancient origin that is widespread among animals. It plays multiple roles during development and in adults as neurotransmitter at synaptic level and neuro hormone controlling complex behaviors in both vertebrates and invertebrates. Tunicates occupy a key phylogenetic position to understand the evolution of serotonin functions since they are the sister group of vertebrates. The presence of serotonin in tunicates was first reported in adults of the ascidian Ciona robusta (formerly Ciona intestinalis) in the 1946. Since then, serotonin systems have been in many tunicate species and its functions during embryogenesis and metamorphosis explored. We reviewed the current knowledge about serotonin in these animals first by comparing its presence and localization in larvae and adults of different species. Then, we focused on the model organism Ciona for which data regarding sequences and expression patterns of genes involved in serotonin synthesis and function have been reported. Overall, we provided a comprehensive overview of serotonergic machinery in tunicates and gave hints for future studies in this field.

show abstract

Distribution and evolution of serotonin-like immunoreactive cells in Thaliacea (Tunicata)

Cited by 3 publications

References 36 publications

Phylogenetic analysis of phenotypic characters of Tunicata supports basal Appendicularia and monophyletic Ascidiacea

Phylogenetic analysis of phenotypic characters of Tunicata supports basal Appendicularia and monophyletic Ascidiacea

Comparative Neurobiology of Biogenic Amines in Animal Models in Deuterostomes

Serotonin system in tunicates: insight from morphological and molecular approaches

Contact Info

Product

Resources

About