"Roachoids", also known as "Roachids", "Blattoids" or Eoblattodea, are members of the stem group of Dictyoptera (the group containing modern cockroaches, termites and praying mantises). They generally resemble cockroaches, but most members, unlike modern dictyopterans, have generally long external ovipositors, and are thought not to have laid ootheca like modern dictyopterans.
"Roachoids", also known as "Roachids", "Blattoids" or Eoblattodea, are members of the stem group of Dictyoptera (the group containing modern cockroaches, termites and praying mantises). They generally resemble cockroaches, but most members, unlike modern dictyopterans, have generally long external ovipositors, and are thought not to have laid ootheca like modern dictyopterans.
==Systematic position== left|thumb|301x301px|Interpretive drawing of a specimen of Anthracoblattina|Anthracoblattina ensifera ([[Phyloblattidae) in ventral view, showing prominent external ovipositor]] Cockroaches are popularly thought to be an ancient order of insects, with their origins in the Carboniferous. However, since the middle of the 20th century it has been known that the primitive cockroach insects found fossilized in Palaeozoic strata are the forerunners not only of modern cockroaches and termites but also of mantises. The origin of these groups from a blattopteran stock are now generally thought to be in the Early Jurassic; the earliest modern cockroaches appeared during the Late Jurassic. Thus, the "Palaeozoic cockroaches" are not cockroaches per se, but a paraphyletic assemblage of primitive relatives. The youngest known roachoids date to the Cretaceous, by which time they were rare compared to modern cockroaches.
Discovered by embedding cosine similarity (sentence-transformers MiniLM, 384-dim).