Typical pattern for Paramatachia spiders.
"Other spiders in the same family (Desidae) make similar webs, like Badumna and Matachia. All can be found in Australia/NZ; the [lower] picture was supposedly taken in Tasmania." Via.
Top photo credit M. Hedin.
I tried to compose some humorous comment about zippers and flies - but couldn't make anything work.
Reposted from 2021.
