Diastoga malignacus
The descendants of S. brevivilla gradually have changed from devoted decomposers into ectoparasites of Libraphotocyanus cytosol species. Their generally short microvilli still serve the purpose of collecting decomposed or half-decomposed food particles. However the topmost microvilli and the next ring right after it has been slightly modified.
The topmost villi now share connection with enzyme producing lyzosomes inside and are provided strength and stamina, necessary to create a puncture wound in L.cytosol, by being partially fused to the inner microtubule reticulum which is a party of parasite's cytoskeleton. S.malignacus that bends it's upper microvilli by dashing into L.cytosol, may be put out of commission for a long time and has to keep feeding on detritus sinking in the upper shelf zone. The only way it can obtain some of L.cytosol material is hanging under other feeding S.malignacus to catch some organic debris the latter has missed.
S. malignacus has regained it's more active swimming behavior to locate their hosts as they move using their slightly stronger flagella. The reason for the flagella's increased level of fitness is due to the unicellular organism recognizing that flagella is being used more and therefore sending more nutrition and health-associated enzymes to the flagella and flagella hook. The protein particles forming the flagella have greater connection with each other but as the same time are able to move their positions relatively each other slightly, just enough to withstand mild deformation by surrounding liquid, increasing flagella's strength.
S.malignacus reproduces through mitosis and is generally solitary, appearing in groups only due to sharing the hunting grounds. Coincidentally, this unintended gathering of S.malignacus may end up killing one or few more L.cytosol due to the latter getting singled out for it's state of health (and thus strongness of it's membrane) and overwhelmed by nearby members of S.malignacus. The rate of S.malignacus remains rapid similarly to it's ancestor S.brevivilla.
S.malignacus possibly started their parasite lifestyle in zone 5 areas shallow enough to allow a switch from sunken Synkrobiotan remain decomposing to probing L. cytosols floating around the shelf's surface. The reason for this switch would be a problem of Synkrobiotan remains not being enough for a growing population of S.brevivilla, as well as stress brought upon by localized over-crowding to necessiate evolution into a producer seeking parasite.
