Results 101 to 110 of about 211 (138)

Two new Pseudoceros (Polycladida: Pseudocerotidae) and a Prostheceraeus (Polycladida: Euryleptidae) from Andaman and Nicobar Islands, India

Zootaxa, 2017
Polyclads are free-living marine flatworms known for their striking colour and patterns. These animals though frequently encountered are still understudied in the Indian context. The present paper describes three new species, two belonging to the genus Pseudoceros Lang, 1884 and one to the genus Prostheceraeus Schmarda, 1859.
Dixit, Sudhanshu, Raghunathan, C., Chandra, Kailash   +2 more
openaire   +3 more sources

Biodiversity of intertidal marine flatworms (Polycladida, Platyhelminthes) in southeastern Australia

Zootaxa, 2021
Flatworms of the Order Polycladida are a group of free-living invertebrates found in a diversity of marine habitats, with over 800 species described worldwide. Marine flatworms are a conspicuous component of Australia’s marine fauna yet have received little attention.
Rodríguez, Jorge, Hutchings, Pat A., Williamson, Jane E.   +2 more
openaire   +3 more sources

Taxonomic Distribution of Tetrodotoxin in Acotylean Flatworms (Polycladida: Platyhelminthes)

Marine Biotechnology, 2020
Tetrodotoxin (TTX), also known as pufferfish toxin, causes a respiratory disorder by blocking neurotransmission, with voltage-gated sodium channel inhibition on muscle and nerve tissues. The toxin is widely distributed across vertebrates, invertebrates and bacteria. Therefore, it is generally thought that TTX in pufferfish accumulates via the food webs,
Maho, Kashitani, Taiki, Okabe, Hikaru, Oyama, Kaede, Noguchi, Haruka, Yamazaki, Rei, Suo, Tetsushi, Mori, Haruo, Sugita, Shiro, Itoi   +8 more
openaire   +2 more sources

A molecular framework for the phylogeny of the Pseudocerotidae (Platyhelminthes, Polycladida)

Hydrobiologia, 2001
Systematic relationships within the cotylean family Pseudocerotidae were examined using nucleotide sequences of the D3 expansion segment of the 28S rDNA gene. A previously suggested separation of Pseudoceros and Pseudobiceros based on the number of male reproductive systems was confirmed.
M. K. Litvaitis, L. J. Newman
openaire   +2 more sources

Ultrastructure of the ovary and oogenesis in the flatworm Prosthiostomum siphunculus (Polycladida, Cotylea)

Cell Biology International, 2016
AbstractBased on light and electron microscopy observations, oogenesis in the cotylean polyclad Prosthiostomum siphunculus was investigated for the first time. The numerous ovarian follicles are dispersed essentially in the dorsal parenchyma. In the follicles, a ventral germinative zone with undifferentiated germs cells of different sizes and a dorsal ...
Mehrez, Gammoudi, Willi, Salvenmoser, Saïda, Tekaya, Bernhard, Egger   +3 more
openaire   +2 more sources

Some New Zealand Polyclads (Platyhelminthes, Polycladida)

Zootaxa, 2007
Eight species of poyclads from New Zealand are presented. Five species were already known to science, and are redescribed. Four of these species have been previously reported from New Zealand, the fifth, Echinoplana celerrima, is new to New Zealand. Two are new species of the genus Chromoplana, Chromoplana sirena n. sp. and Chromoplana kaikouris n. sp.
openaire   +1 more source

Fine structure of the eyes of Pseudoceros canadensis (Turbellaria, Polycladida)

Zoomorphology, 1981
The cerebral and epidermal ocelli of the Muller's larva and the cerebral and tentacular eyes of the adult turbellarian Pseudoceros canadensis were studied by electron microscopy. The right cerebral ocellus of the larva consists of one cup-shaped pigmented cell and three sensory cells that bear microvilli.
Richard M. Eakin, Jean L. Brandenburger
openaire   +1 more source

Polycladida biodiversity and systematics: an integrative approach

2017
In face of the fact that marine biodiversity is highly threatened by human impacts on the environment, it is important to know what we want to protect. This thesis addresses the biodiversity and systematics of Polycladida, which are free-living Platyhelminthes with highly ramified intestine.
openaire   +1 more source

Tissue Localization of Tetrodotoxin in the Flatworm Planocera multitentaculata (Platyhelminthes: Polycladida)

Marine Biotechnology
Tetrodotoxin (TTX), a pufferfish toxin, is a highly potent neurotoxin that has been found in a wide variety of animals. The TTX-bearing flatworm Planocera multitentaculata possesses a large amount of TTX and is considered responsible for the toxification of TTX-bearing animals such as pufferfish (Takifugu and Chelonodon) and the toxic goby Yongeichthys
Ryo, Yonezawa, Kentaro, Hayashi, Hikaru, Oyama, Kazutoshi, Yoshitake, Soshi, Sato, Jayan Duminda M, Senevirathna, Ashley R, Smith, Taiki, Okabe, Rei, Suo, Shigeharu, Kinoshita, Tomohiro, Takatani, Osamu, Arakawa, Shuichi, Asakawa, Shiro, Itoi   +13 more
openaire   +2 more sources

Biodiversity of marine flatworms (Polycladida, Platyhelminthes) in southeastern Australia

2021
Polycladida is an order of free-living invertebrates of the Phylum Platyhelminthes, commonly referred to as flatworms. The functional roles of polyclad flatworms in ecological communities are anticipated to be complex and variable but our understanding of such processes is currently hampered by a lack of information on fundamental knowledge, such as ...
openaire   +1 more source