While trying to tag this question which essentially asks for possible arthropods laying such stalked eggs I found two tags arthropod and entomology.
Three questions are tagged arthropod and there are 467 questions with tag entomology.
I did a surface browsing and found some millipede questions (Non-insects) tagged entomology (study of Insecta) and not Arthropod. I have a feeling that there may be general questions about arthropods too that have the entomology tag because the term insect is loosely used to mean 'any insect or insect like invertebrate.' (Dictionary)
I wonder if I should edit arthropod into Arthropodology and then the tag can be useful for tagging questions that are in general about arthropods and questions about Carcinology (the study of crustaceans) and Myriapodology (the study of centipedes, millipedes, and other myriapods) as we don't have tags for these subfields yet.
If there's no counter-argument in a week I will rename the arthropod tag and also elaborate the entomology tag.