Flatworm reproduction is hermaphroditic, meaning each individual produces eggs and sperm. When two flatworms mate, they exchange sperm so both become fertilized. They usually do not fertilize their own eggs.
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Platyhelminthes - phylum containing about 20,000 species of soft-bodied, bilaterally symmetrical, invertebrate animals, commonly called flatworms. There are four classes: the free-living, primarily aquatic class, Turb...
Acoel Flatworm Waminoa species
The diminutive acoel flatworms look like colored spots on the bubble coral on which they live.
Flatworms are unsegmented, bilaterally symmetrical worms that lack a coelom (acoelomate) but that do have three germ layers. Some forms are free living but many are parasitic.
Bedford's flatworm, Pseudobiceros bedfordi
The Platyzoa include the phylum Platyhelminthes, the flatworms. These were originally considered some of the most primitive Bilateria, but it now appears they developed from more complex ancestors.
Worms include flatworms, roundworms and the segmented worms: earthworms, leeches and marine polychaete worms.
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Worms ...
Numerous parasites infest moose, including flatworms (e.g., giant liver flukes, rumen flukes (Paramphistomum spp.), and tapeworms (hydatid worm (Echinococcus granulosus) and Taenia spp.), nematodes (e.g.
Some of these parasites include round worms, pinworms, flatworms, and tapeworms. They will rob the nutrients from your iguana.
Many of the 25,000 species of flatworm — flat, ribbon- or leaf-shaped animals — are parasitic, including the familiar tapeworm. There are over 80,000 species of roundworm, 15,000 of which are parasitic.
indicus have been declining: A land snail, Achatina fulica , has been greatly reduced due to the introduction of the predaceous flatworm, Platydemus manokwari, ...
The so-called flatworms (Platyelmia, q.v.), including the Planarians, Flukes (see Trematodes), Cestodes (see Tapeworm) and the curious Mesozoa, are no doubt related. The marine Nemertine worms (see Nemertina) are isolated.
Molluscs are thought to have evolved from a segmented, wormlike animal similar to present-day flatworms. Their closest living relatives are either the annelids (also known as segmented worms) or platyhelminths (non-segmented worms or flatworms).
Non-segmented worms (flatworms) - Phylum Platyhelminthes
Segmented worms - Phylum Annelida
Joint-legged animals - Phylum Arthropoda
Soft-bodied animals (shellfish) - Phylum Arthropoda ...
February 27, 2012 " Researchers have demonstrated how a species of flatworm overcomes the aging process to be potentially immortal. The discovery may shed light on the possibilities of alleviating aging and age-related ... > full story ...
Parasitic flatworms or tapeworms (cestodes) Baerietta gerrhonoti and Mesocestoides sp.
Host to Western Black Legged Ticks which may carry spirochete bacteria (Borrelia burgdorferi) that cause Lyme disease in humans ...
mouth -- Front opening of the digestive tract, into which food is taken for digestion. In flatworms, the mouth is the only opening into the digestive cavity, and is located on the "belly" of the worm.
Moreover, the threatened KAS is subject to natural predation by passerine birds and probably field mice, and it is vulnerable to infestation by a parasitic flatworm trematode (Leucochloridium cyanocittae).
Jeff's Nudibranch Site and Coral Reef Gallery
The Slug Site
Nudibranchs of Eastern Australia (South Qld and NSW), Lady Musgrave Island, Thailand, Red Sea, and Australian Flatworms
Sea Slug Forum
OKINAWAN OPISTHOBRANCH OF THE WEEK ...
There are also at least two species of crabs - including the large, beautiful Gulfweed Swimming Crab - a relative of the Blue Crab. There are flatworms and mollusks known as nudibranchs.
Echiura and Sipuncula, previously regarded as separate phyla, are now regarded as sub-groups of polychaetes. Annelids are considered members of the Lophotrochozoa, a "super-phylum" of protostomes that also includes molluscs, brachiopods, flatworms ...
 See also: Diver, Shell, Genet, Platyhelminthes, Shark
  
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