Brunneria borealis mating

[happy1892]

Actually, the single chromosome for males and double chromosome for females may be the way with mantises, too, like with honeybees.

XO sex-determination system - Wikipedia

en.wikipedia.org

https://bioone.org/journals/journal-of-orthoptera-research/volume-19/issue-2/034.019.0207/Sex-and-Neo-Sex-Chromosomes-in-Orthoptera-A-Review/10.1665/034.019.0207.full#:~:text=Apparently%20in%20the%20Orthoptera%2C%20Mantodea,common%20ancestors%20of%20these%20groups%20(

So maybe something caused a loss of one of the two chromosomes in the Brunneria borealis to produce a male?