Achiasmatic-meiosis
Guides
Phymatopus
swift moths, ghost moths
Phymatopus is a genus of swift moths in the family Hepialidae, erected by Wallengren in 1869. The genus occurs across Eurasia and western North America, with species distinguished primarily by male genitalia morphology and forewing pattern variation. Members lack tibial spurs, proboscis, frenulum, and have very short antennae. The genus exhibits an unusual mating system where males release attractants to draw females, reversing the ancestral hepialid condition.
Sisyra nigra
Black Spongillafly, Black Spongefly
Sisyra nigra is a small lacewing in the family Sisyridae, commonly known as the Black Spongillafly. It is the most widely distributed of the three British Sisyridae species and occurs across the Holarctic region. The species has a unique life cycle with fully aquatic larvae that are specialized predators of freshwater sponges, while adults are terrestrial and dispersive. S. nigra is notable for its distinctive achiasmatic sex chromosome segregation mechanism during male meiosis, which differs from other Neuroptera and supports the basal phylogenetic position of Sisyridae within the order.