Pseudophyllidea

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Pseudophyllidea
Scientific classification Edit this classification
Domain: Eukaryota
Kingdom: Animalia
Phylum: Platyhelminthes
Class: Cestoda
Subclass: Eucestoda
Order: Pseudophyllidea
Pseudophyllid

Pseudophyllid

ventral surface, and the ovary is bilobed ("dumbbell
-shaped").

The order has been discovered by phylogenetic analysis to be

paraphyletic, and has been broken up into two orders, Bothriocephalidea and Diphyllobothriidea.[1]
Eggs have one flat end (the operculum) and a small knob on the other end. All pseudophyllid cestodes have a procercoid stage in their life cycle, and most also have a plerocercoid stage.

The majority of genera in this group have fish as their definitive hosts, but the most important

intermediate hosts. Typical mammalian hosts are whales and other cetaceans, and pinnipeds.[2]
The hermaphroditic Schistocephalus solidus parasitizes fish and fish-eating water birds, with a cyclopoid copepod as the first intermediate host.

When humans harbor

sparaganosis
.

References