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I'm wondering where this extra stroke came from in the kanji for cicada that I have highlighted and would like an explanation since it doesn't match up with the kanji radicals on kanshudo
https://www.kanshudo.com/word/%E8%9D%89/1387080?oq=%E8%9D%89
According to the Radicals for 虫 the stroke that I've highlighted doesn't come from them so I'm wondering what it is there for since the only Radicals for it are "丶" and "中"
from what i know, the kanji for "insect" is a fundamental radical itself, but if you really want a mnemotechnic, i'd say that 口 is the insect mouth biting an arm ム (not the real meaning of that but it kinda looks like an arm)
based on this list