Why did God get rid of the Trilobites?

[Oldandeasilyconfused]

 Ignoramus here; those things look a lot like cockroaches. Could they have evolved into prawns/shrimp  or Crayfish/lobsters? Not sure about lobsters, but pretty sure prawns are insects.

No,  prawns are not insects.      Trilobites did not evolve into shrimps or crayfishes. 

Prawns, insects, and trilobites exemplify 3 of the 5 great branches of the Arthropods family.    The 4th and 5th branches are examplified by millipedes and spiders respectively.  

Although arthropods from different branches often share many characteristics, and may seem similar across branches while the distinction between branches may seem subtle and technical, these distinctions that distinguish one branch from another in fact reflect fundamental differences during earliest developments of embryo between members on different branches.    these embryonic difference  in turn reflect very long history of separate evolution.    It is estimated the 5 branches of arthropod family last shared a common ancester at least 540 million years ago.

 Mkay. Thought you might be interested in this:

Not sure where I read about Prawns being insects, but I did read it. Can't remember where or when, so my claim by itself may be taken as hearsay.

Today I went looking, Googling "'are prawns insects?"

Found this after a quick search:

"Both insects and crustaceans have three part bodies, made up of a head, thorax, and abdomen. Both have jointed legs. And both have exoskeletons. ... That means that shrimp, lobsters, and other crustaceans are related – very closely related – not only to cockroaches, but to all other insects, too"

In evolutionary terms, isn't that  a distinction without a difference?

https://cockroachfacts.com/are-shrimp-co...s-related/