Spiders

Spiders, also known as Taratects, encompass a race of large arachnoid monsters found in the other world. All spider-type monsters descend from Ariel, the Origin Taratect.

Evolution Tree

 * Small Lesser Taratect - F Rank Monster
 * Lesser Taratect - E Rank Monster
 * Taratect -C Rank Monster
 * Greater Taratect - B Rank Monster (Can reach up to A Rank)
 * Arch Taratect - S Rank Monster
 * Queen Taratect - Legendary Rank Monster
 * Origin Taratect - ??? Rank Monster
 * Small Taratect - E Rank Monster
 * Small Poison Taratect - C Rank Monster
 * Poison Taratect - C Rank Monster
 * Orthocadinaht - B Rank Monster
 * Zoa Ele - C Rank Monster
 * Ede Saine - B Rank Monster (Can reach up to S Rank)
 * Zana Horowa - Legendary Rank Monster
 * Arachne - ??? Rank Monster
 * Unknown/Other
 * Puppet Taratect
 * Horo Neia

Evolution

 * Known:
 * Small Lesser Taratect LV10 → Lesser Taratect
 * Small Lesser Taratect LV10 → Small Taratect
 * Small Taratect LV10 → Taratect
 * Small Taratect LV10 [Poison Technique User] → Small Poison Taratect
 * Small Poison Taratect LV10 → Poison Taratect
 * Small Poison Taratect LV10 [Assassin] → Zoa Ele
 * Zoa Ele LV20 → Greater Taratect
 * Zoa Ele LV20; magic-type skill(s); stats above a certain amount → Orthocadinaht
 * Zoa Ele LV20 → Ede Saine
 * Ede Saine LV30 → Zana Horowa
 * medium or small taratect LV50 [Ruler of Pride] → Arachne


 * Implied from anime PV1:
 * Lesser Taratect → (Lesser Poison Taratect) → Poison Taratect → (Great Poison Taratect)
 * Poison Taratect → Orthocadinaht
 * Taratect → (Great Taratect) → Greater Taratect → Arch Taratect → Queen Taratect
 * Ede Saine → Queen Taratect


 * Implied from names:
 * Taratect [Poison Technique User] → Poison Taratect


 * Great Taratect [Poison Technique User] → Great Poison Taratect

Reproduction
Taratects that have the Egg-Laying skill can reproduce.


 * Origin Taratect → Queen Taratect
 * Queen Taratect → Small Lesser Taratect
 * Zana Horowa → Horo Neia
 * Horo Neia → Horo Neia

Known Individuals

 * Ariel (progenitor)
 * Kumoko
 * Mother
 * Ael
 * Sael
 * Riel
 * Fiel

Trivia

 * Lesser taratects probably are unable to evolve into taratects.
 * Upon the hatching and spawning of a Small Lesser Taratect via the Queen Taratect, canabalism is practiced between the Smaller Lesser Taratects and the Queen Taratect.