Lizardworms

Breathing and Blood
Like all members of the Binucleozoa kingdom, their blood is red due to iron rich erythrocytes.

History
Lizardworms originated from the scuttlecrabs, which are themselves stumpworms. The first lizardworm appeared in the Flischian period. It had some traits of modern species, including an endoskeleton, a long tail, and typical lizardworm jaws, but unlike modern species it still retained most of the ancestral carapace. Shovel-headed lizardworms split off in the Ladymian period.

The Desert Lizardworm, the first species to bear the facial limbs present in many living species, appeared in the Clayrenian period. Not long after in the Allenian period, the more heavily armored, but now extinct, giant lizardworms descended from the Bulette Lizardworm made their first appearance. All three groups of lizardworm at the time had representatives that survived the gamma ray burst (Cave Lizardworm, Gladiator Lizardworm, and Stalagmite Clinger).

Following the gamma ray burst, lizardworms vastly diversified into many megafaunal forms, mostly descended from the gladiator. Cave lizardworms, too, exited the caves and diversified, though not to the same degree. Ultimately, several cave lizardworms survived the ice comet impact event, but of them only the Cunning Lizardworm would survive the rise of chitinbanes.

From the cunning lizardworm came the nakeworms and the gossalizards,

Two kinds of gossalizard survive today, naked cold-blooded species descended from the Mandate Gossalizard and fuzzy lukewarm- and warm-blooded species descended from the Warf Gossalizard, and nakeworms are also survived by the Fairyshell. In the Darthian period, a some warf gossalizards would become more herbivorous, giving rise to the Grazing Gossalizard. Adapted for the colder parts of Drake, this species would be a minor player in it's ecosystem. This would all change by the Bonoian period and especially the Huckian period. During these two periods, the cooling climate of Drake meant the grazing gossalizards found themselves with an opportunity to diversify. The result would be the evolution of the pasakereds and lizalopes, two groups characterized by size and speed respectfully.

Types of Lizardworms

 * Giant Lizardworms: Everything that evolved from the Bulette Lizardworm.
 * Gossalizards: Everything that evolved from the Gossamer Lizardworm.
 * Nakeworms: Everything that evolved from the Cave Nakeworm.
 * Shovel-Headed: Everything evolved from the Shovel-Headed Lizardworm.
 * Strongjawed Lizardworms: Everything evolved from the Strongjaw Lizardworm.