Results 21 to 30 of about 211 (138)

Reinvestigating the early embryogenesis in the flatworm Maritigrella crozieri highlights the unique spiral cleavage program found in polyclad flatworms [PDF]

EvoDevo, 2019
Background Spiral cleavage is a conserved, early developmental mode found in several phyla of Lophotrochozoans resulting in highly diverse adult body plans.
Johannes Girstmair, Maximilian J. Telford   +1 more
doaj   +2 more sources

Does the frontal sensory organ in adults of the hoplonemertean Quasitetrastemma stimpsoni originate from the larval apical organ? [PDF]

Frontiers in Zoology, 2020
Background The apical organ is the most prominent neural structure in spiralian larvae. Although it has been thoroughly investigated in larvae of the class Pilidiophora in phylum Nemertea, studies on its structure in other nemertean larvae are limited ...
Timur Yu Magarlamov, Vyacheslav Dyachuk, Alexey V. Chernyshev   +2 more
doaj   +2 more sources

Regeneration of the flatworm Prosthiostomum siphunculus (Polycladida, Platyhelminthes). [PDF]

Cell Tissue Res, 2021
AbstractFueled by the discovery of head regeneration in triclads (planarians) two and a half centuries ago, flatworms have been the focus of regeneration research. But not all flatworms can regenerate equally well and to obtain a better picture of the characteristics and evolution of regeneration in flatworms other than planarians, the regeneration ...
Schadt T, Prantl V, Grosbusch AL, Bertemes P, Egger B.   +4 more
europepmc   +4 more sources

Fantastic Flatworms and Where to Find Them: Insights into Intertidal Polyclad Flatworm Distribution in Southeastern Australian Boulder Beaches

Diversity, 2023
There is a rapid and extensive decline of our marine biodiversity due to human impacts. However, our ability to understand the extent of these effects is hindered by our lack of knowledge of the occurrence and ecology of some species groups.
Louise Tosetto, Justin M. McNab, Pat A. Hutchings, Jorge Rodríguez, Jane E. Williamson   +4 more
doaj   +1 more source

First record of Stylostomum ellipse (Dalyell, 1853) (Platyhelminthes, Polycladida) from the Pacific Ocean [PDF]

Check List, 2020
The polyclad flatworm Stylostomum ellipse (Dalyell, 1853) has hitherto been recorded from the Antarctic region, Mediterranean Sea, Patagonian region, Scandinavia, South Africa, and South Georgia Island. In this study, we report S.
Aoi Tsuyuki, Yuki Oya, Hiroshi Kajihara
doaj   +3 more sources

The ultrastructure of the apical organ of the Müller's larva of the tiger flatworm Prostheceraeus crozieri

Cell Biology International, Volume 47, Issue 8, Page 1354-1367, August 2023., 2023
Abstract The tiger flatworm Prostheceraeus crozieri (Polycladida) develops via an eight‐lobed, and three‐eyed planktonic Müller's larva. This larva has an apical organ, ultrastructural details of which remain elusive due to a scarcity of studies.
Isabel L. Dittmann, Alexandra L. Grosbusch, Magdalena Nagler, Willi Salvenmoser, Armin Zankel, Maximilian J. Telford, Bernhard Egger   +6 more
wiley   +1 more source

The serotonergic nervous system of prolecithophorans shows a closer similarity to fecampiids than to triclads (Platyhelminthes)

Journal of Morphology, Volume 282, Issue 4, Page 574-587, April 2021., 2021
The nervous system in Prolecithophora has been studied for the first time using fluorescent immunocytochemistry. It consists of a brain and three longitudinal nerve cords, which are connected on either side of the body by the main lateral commissure. The ventral cords are considered as main cords and show two pairs of brain roots.
Alexandra L. Grosbusch, Philip Bertemes, Bernhard Egger   +2 more
wiley   +1 more source

Characterization and phylogenetic position of two sympatric sister species of toxic flatworms Planocera multitentaculata and Planocera reticulata (Platyhelminthes: Acotylea)

Mitochondrial DNA. Part B. Resources, 2020
The complete mitochondrial genomes of two toxic flatworm species of the genus Planocera were determined. The total length of mitochondrial DNA (mtDNA) was 15,657 bp in Planocera multitentaculata and 15,486 bp in Planocera reticulata and included 12 ...
Ryo Yonezawa, Shiro Itoi, Yoji Igarashi, Kazutoshi Yoshitake, Hikaru Oyama, Shigeharu Kinoshita, Rei Suo, Shinichi Yokobori, Haruo Sugita, Shuichi Asakawa   +9 more
doaj   +1 more source

Cotylea (Polycladida): a cladistic analysis of morphology [PDF]

Invertebrate Biology, 2008
Abstract. Polyclad flatworms are acoelomate bilaterians found in benthic communities worldwide, predominantly in marine environments. Current polyclad systematics is unstable, with two non‐concordant classification schemes resulting in a poor understanding of within‐group relationships. Here we present the first phylogenetic framework for the suborder
Rawlinson, Kate A., Litvaitis, Marian K.
openaire   +2 more sources

Policládidos (Platyhelminthes: "Turbellaria"€) del Atlántico Tropical Occidental

Biota Colombiana, 2004
El phylum Platyhelminthes es considerado una ramificación ancestral dentro de los phyla bilaterales (Hyman 1951). A éste pertenecen gusanos acelomados y dorsoventralmente aplanados que carecen de sistemas circulatorio y respiratorio (Hyman 1951).
Sigmer Y. Quiroga, Marcela Bolaños, Marian K. Litvaitis   +2 more
doaj   +8 more sources