Six-eyed
Guides
Pseudosinella sexoculata
Pseudosinella sexoculata is a species of elongate springtail in the family Entomobryidae, described by Schött in 1902. Members of this genus are characterized by their slender, scaled bodies and are typically found in soil and leaf litter habitats. The specific epithet "sexoculata" refers to the presence of six eyes (ocelli), a diagnostic feature distinguishing it from related species. Like other entomobryomorph springtails, it possesses a furcula for jumping and lacks a collophore on the first abdominal segment.
Sicariidae
Sixeyed Sicariid Spiders, recluse spiders, violin spiders, sand spiders, assassin spiders
Sicariidae is a family of haplogyne spiders comprising three genera—Loxosceles, Sicarius, and Hexophthalma—with approximately 177-180 species. Members are characterized by six eyes arranged in three dyads (pairs), a distinctive trait among spiders. The family includes medically significant species such as the brown recluse (Loxosceles reclusa) and six-eyed sand spiders. All genera produce sphingomyelinase D or related tissue-destroying substances in their venom, unique among spiders. The family exhibits diverse ecological strategies: Loxosceles species are synanthropic and found nearly worldwide in warmer regions, while Sicarius and Hexophthalma are specialized desert dwellers with self-burying behavior.
Trogloraptoridae
Cave Robber Spiders
Trogloraptoridae is a family of spiders established in 2012 to accommodate the single genus Trogloraptor, found in caves and old-growth forests of the Pacific Northwest. The family was erected based on the unique morphology of Trogloraptor marchingtoni, which possesses distinctive raptorial claws unlike any other known spider. This discovery marked the first new family of spiders described from North America since the 1890s. The family represents a significant evolutionary lineage that has forced revisions to understanding of spider phylogeny.