Ryan Photographic - Platyhelminthes- Flatworms, flukes and tapeworms


Bryozoa

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Phylum Platyhelminthes - Flatworms and kin

The phylum Platyhelminthes incorporates four major sub-groups; the turbellaria, the cestoda, monogenea and the trematoda. The animals pictured here are all turbellarians (at least so far). These are the free-living flatworms. They are almost all predators and their widespread presence suggests that they are pretty good at it. They lack a through gut and must eliminate wastes through their mouth. They are all hermaphroditic and in some of the marine species undertake an extraordinary behavior referred to as penis fencing. Reproductive adults joust with each other trying to inseminate the other through one of two dagger-like penises. Losers are often left with jagged wounds and the burden of motherhood as the eggs are fertilized. But it is often more traumatic than that - the injected sperm make a beeline for eggs, often damaging internal organs along the way. This bizarre behavior can be seen here.

Freshwater turbellarians such as the Neppia species pictured below are capable of amazing acts of regeneration. If a cut is made down the middle of the head they will grow two new heads. If two cuts are made they will grow three heads!

 

Eurylepta species

Eurylepta species Raja Ampat West Papua

WORM 1500 Eurylepta species? Raja Ampat West Papua.

Leptoplana brunnea brown flatworm

Leptoplana brunnea brown flatworm, Neww Zealand

WORM 0145 Leptoplana brunnea brown flatworm, New Zealand.

Maiazoon orsaki Orsak's flatworm

Maiazoon orsaki Orsak's flatworm, Raja Ampat, West Papua

WORM 1029 Maiazoon orsaki Orsak's flatworm, Raja Ampat, West Papua.

Neppia montana Freshwater flatworm

New Zealand freshwater planarian

Neppia montana Freshwater planarian, Cass, New Zealand.

Pseudobiceros bifurcus Flatworm

flatowrm

WORM 2282 Pseudobiceros bifurcus, marine flatworm, Raja Ampat, West Papua.

Pseudobiceros gloriosus Glorious flatworm

glorious flatworm

Pseudobiceros gloriosus, Glorious flatworm, Kadavu, Fiji.

Pseudobiceros sp. Flatworm

Pseidobiceros flatwom

Pseudobiceros sp. Marine flatworm.

Pseudoceros dimidiatus

Pseudoceros dimidiatus flatworm

Pseudoceros dimidiatus, Kadavu, Fiji

Pseudoceros flatworm

WORM 2604 Pseudoceros dimidiatus, Raja Ampat, West Papua.

Pseudoceros dimidiatus Symmetrical flatworm Raja Ampat

WORM 9658 Pseudoceros dimidiatus Symmetrical flatworm Raja Ampat.

Pseudoceros ferrugineus Flatworm

marine flatwom

WORM 5870 Pseudoceros ferrugineus Flatworm, Kona, Hawaii.

marine flatworm

Pseudoceros ferrugineus Flatworm, Fiji.

Pseudoceros lindae Linda's Flatworm

Pseudoceros lindae Linda's Flatworm, Raja Ampat, West Papua

WORM 0665 Pseudoceros lindae Linda's Flatworm, Raja Ampat, West Papua.

Pseudoceros lindae Linda's Flatworm, Raja Ampat, West Papua

WORM 0666 Pseudoceros lindae Linda's Flatworm, Raja Ampat, West Papua.

Pseudoceros species

Swimming flatworm, Raja Ampat, West Papua

WORM 2260 Swimming Pseudoceros flatworm, Raja Ampat.

Swimming flatworm, Raja Ampat, West Papua

WORM 2259 Swimming Pseudoceros flatworm, Raja Ampat.

Pseudoceros species 2

Pseudoceros species Raja Ampat

WORM 0829 Pseudoceros species Raja Ampat.

Thysanozoon nigropapillosum Gold speckled flatworm

Gold-speckled flatworm

Thysanozoon nigropapillosum Gold speckled flatworm, Fiji.

Thysanozoon nigropapillosum, swimming flatworm, Taveuni, Fiji

WORM 7460 Thysanozoon nigropapillosum, swimming flatworm, Taveuni, Fiji.

Waminoa species

Waminoa flatworm and ispods on coral Kri Eco, Raja Ampa

WORM 8532 Waminoa species and isopods on coral Kri Eco, Raja Ampat

Waminoa species Kri Eco, Raja Ampat .

WORM 8526 Waminoa species Kri Eco, Raja Ampat.

Unidentified flatworm species 1

Unidentified flatworm, Raja Ampat, West Papua

WORM 1925 Unidentified flatworm, Raja Ampat, West Papua.

 
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