Starship Asterisk*

The "tested" in the "tested in 2011" is a link http://tardigradesinspace.blogspot.co.uk/ that brings up information relating to a space experiment involving tardigrades conducted in 2007. The 2011 Fobos-Grunt mission in 2011 did have some tardigrades aboard but that mission soon failed. I think the '2011' in the "tested in 2011" should be 2007 to avoid confusion (well it confused me ).

neufer wrote:

JohnD wrote:Some tardigrades have more fearsome looking mouths. See image in the middle of this page: [Pinterest]. 'Proper' jaws 'n' teeth!

Hydrothermal Worms are tardigrade undersea Morlock cousins.

Science writer John Rennie tried to further identify the hydrothermal worm image, but found that another science writer, Carl Zimmer, already beat him on the same quest: it’s Lepidonotopodium piscesae.

Both species belong to Protostomia, and both are about the same size, but that’s where the similarity ends. Lepidonotopodium piscesae is an Annelid a.k.a. sort of ringed worm. Originally, Panarthropoda, including Tardigrades, were considered to be closely related to the annelids, grouped together as the Articulata, but newer studies place them among the Ecdysozoa (like centipedes).
So, distant cousins, and that jaw image doesn’t belong on a tardigrade page.

Case wrote:

neufer wrote:

JohnD wrote:
Some tardigrades have more fearsome looking mouths. See image in the middle of this page: [Pinterest]. 'Proper' jaws 'n' teeth!

Hydrothermal Worms are tardigrade undersea Morlock cousins.

Science writer John Rennie tried to further identify the hydrothermal worm image, but found that another science writer, Carl Zimmer, already beat him on the same quest: it’s Lepidonotopodium piscesae.

Both species belong to Protostomia, and both are about the same size, but that’s where the similarity ends. Lepidonotopodium piscesae is an Annelid a.k.a. sort of ringed worm. Originally, Panarthropoda, including Tardigrades, were considered to be closely related to the annelids, grouped together as the Articulata, but newer studies place them among the Ecdysozoa (like centipedes).
So, distant cousins, and that jaw image doesn’t belong on a tardigrade page.

• Thanks for clarifying, Case
  
  So it's safer to go after cut(icl)e rather than (spiral) cleavage.

https://en.wikipedia.org/wiki/Ecdysozoa wrote:
<<The most notable characteristic shared by ecdysozoans is a three-layered cuticle (four in Tardigrada) composed of organic material, which is periodically molted as the animal grows. This process of molting is called ecdysis, and gives the group its name. The ecdysozoans lack locomotory cilia and produce mostly amoeboid sperm, and their embryos do not undergo spiral cleavage as in most other protostomes.>>