Other arthropods may make use of the antlion larva's ability to trap prey. Antlion larvae are unusual among insects in lacking an anus. The larvae are triangular in shape, the outline resembling that of antlion larvae. Antlion larvae require loose soil, not necessarily but often sand. In some species, their larval form, known as the antlion, is an ambush predator. While on the ground, she is in danger from antlion larvae. Weeleus acutus is an antlion of the Myrmeleontini tribe. The fictional sarlacc from the "Star Wars" franchise is often compared to the real-life antlion. Another invertebrate, the antlion, also makes use of solid projectiles. Nemoleontini is an antlion tribe in the subfamily Myrmeleontinae. The exact meaning of the name "antlion" is uncertain. He is modeled after an antlion. It is also referenced in some sources as a Formicaleon (Antlion), Formicaleun or Mirmicioleon. Hagenomyia tristis is an African antlion species. Myrmeleon exitialis is a species of antlion in the family Myrmeleontidae.