Getting a Head with Ptychodera flava Larval Regeneration

2018 ◽  
Vol 234 (3) ◽  
pp. 152-164 ◽  
Author(s):  
Shawn M. Luttrell ◽  
Yi-Hsien Su ◽  
Billie J. Swalla
Keyword(s):  
2004 ◽  
Vol 21 (1) ◽  
pp. 69-78 ◽  
Author(s):  
Yoko Nakajima ◽  
Tom Humphreys ◽  
Hiroyuki Kaneko ◽  
Kunifumi Tagawa

2001 ◽  
Vol 3 (6) ◽  
pp. 375-390 ◽  
Author(s):  
Jonathan Q. Henry ◽  
Kunifumi Tagawa ◽  
Mark Q. Martindale

2015 ◽  
Vol 32 (1) ◽  
pp. 33-37 ◽  
Author(s):  
Asuka Arimoto ◽  
Kuni Tagawa
Keyword(s):  

2013 ◽  
Vol 13 (1) ◽  
pp. 129 ◽  
Author(s):  
Tetsuro Ikuta ◽  
Yi-Chih Chen ◽  
Rossella Annunziata ◽  
Hsiu-Chi Ting ◽  
Che-huang Tung ◽  
...  

2018 ◽  
Author(s):  
Chiara Colantuono ◽  
Marco Miralto ◽  
Mara Sangiovanni ◽  
Luca Ambrosino ◽  
Maria Luisa Chiusano

Next-generation sequencing (NGS) technologies are greatly facilitating the sequencing of whole genomes leading to the production of different gene annotations, released often from both reference resources (such as NCBI or Ensembl) and specific consortia. All these annotations are in general very heterogeneous and not cross-linked, providing ambiguous knowledge to the users. In order to give a quick view of what is available, and trying to centralize all the genomic information of reference marine species, we set up GENOMA (GENOmes for MArine biology). GENOMA is a multilevel platform that includes all the available genome assemblies and gene annotations about 12 species (Acanthaster planci, Branchiostoma floridae, Ciona robusta, Ciona savignyi, Gasterosteus aculeatus, Octopus bimaculoides, Patiria miniata, Phaeodactylum tricornutum, Ptychodera flava and Saccoglossus kowalevskii). Each species has a dedicated JBroswe and web page, where is summarized the comparison between the different genome versions and gene annotations available, together with the possibility to directly download all the information. Moreover, an interactive table including the union of different gene annotations is also consultable on-line. Finally, a query page system that allows to search specific features in one or more annotations simultaneously, is embedded in the platform. GENOMA is publicly available at http://bioinfo.szn.it/genoma/.


1897 ◽  
Vol s2-40 (157) ◽  
pp. 165-184
Author(s):  
ARTHUR WILLEY

1. This is the first time that an Enteropneust with a free pharynx has been studied in the living condition. 2. The Ptychodera flava of Eschscholtz (char. emend. mihi) is rightly assigned by Spengel to his amended genus Ptychodera, as shown by the presence of the genital pleura, of external liver saccules, and by the length of the collar region. 3. P. flava belongs to Spengel's sub-genus Chlamydothorax, as shown by the ventral origin of the genital pleura, the diffuse gonads, and the free pharynx. 4. In the fact of the gill-slits being open directly to the exterior throughout their entire length, P. flava is more closely related to P. bahamensis than to any other described species. This is also indicated by the simple rows of paired liver saccules as opposed to the irregular multiple arrangement met with in P. erythræa. 5. The genus Ptychodera. (referring more especially to the sub-genus Chlamydothorax) probably represents an archaic type, as shown by the diffuse arrangement of the gonads, the free pharynx, and its littoral habitat; and it is probably not, as Spengel supposes it to be, phylogenetically younger than the other genera of Enteropneusta. 6. The gill-slits, branchial skeleton, and the temporary atrium formed by the apposition of the genital pleura in Ptychodera, offer a general homology to the corresponding structures in Amphioxus and the Ascidians, while presenting many differences in the details of their structure and relations. 7. Some of these differences are comparatively unimportant, and such as might well be expected to occur in distantly related forms with such totally different habits of existence, while others are to be accounted for by a wide interpretation of the principle of correlation between structure and function. 8. Many differences of detailed structure in the pharyngeal wall and its skeletal supports between the Enteropneusta and Amphioxus are to be correlated with the fact that, in the former, the tongue-bars are larger (often, as in P. flava, very much larger) than the primary bars, while in the latter the reverse condition obtains.


2012 ◽  
Vol 279 (1740) ◽  
pp. 3041-3048 ◽  
Author(s):  
C. B. Cameron ◽  
C. D. Bishop

Here, we report the discovery and characterization of biominerals in the acorn worms Saccoglossus bromophenolosus and Ptychodera flava galapagos (Phylum: Hemichordata). Using electron microscopy, X-ray microprobe analyses and confocal Raman spectroscopy, we show that hemichordate biominerals are small CaCO 3 aragonitic elements restricted to specialized epidermal structures, and in S. bromophenolosus, are apparently secreted by sclerocytes. Investigation of urchin biomineralizing proteins in the translated genome and expressed sequence tag (EST) libraries of Saccoglossus kowalevskii indicates that three members of the urchin MSP-130 family, a carbonic anhydrase and a matrix metaloprotease are present and transcribed during the development of S. kowalevskii . The SM family of proteins is absent from the hemichordate genome. These results increase the number of phyla known to biomineralize and suggest that some of the gene-regulatory ‘toolkit’, if not mineralized tissue themselves, may have been present in the common ancestor to hemichordates and echinoderms.


2014 ◽  
Vol 15 ◽  
pp. 35-43 ◽  
Author(s):  
Shu-Hwa Chen ◽  
Kun-Lin Li ◽  
I-Hsuan Lu ◽  
Yu-Bin Wang ◽  
Che-Huang Tung ◽  
...  
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