Portal:Arthropods/Did you know/25

... that although the Pacific sand crab can only crawl and burrow backwards (pictured), it can also tread water?
... that when the extinct forester moth Neurosymploca? oligocenica was described, a second fossil was known but unavailable for study?
... that the extinct Hydriomena? protrita was the first geometer moth to be described from the American fossil record?
... that Praunus flexuosus, the first mysid shrimp ever to be described, may have been transported to North America during World War II?
... that the seeds of the European sedge Carex pilulifera may be dispersed by the ant Myrmica ruginodis?
... that the family placement for the fossil moth genus Dominickus was not noticed until entomologist Norman Tindale was looking at pictures of modern moths from Australia?