Protist-symbiosis
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Zootermopsis
dampwood termites
Zootermopsis is a genus of dampwood termites in the family Archotermopsidae, containing four extant and one extinct species native to western North America. These termites inhabit decaying wood in temperate rain forests, where they digest cellulose with the aid of symbiotic gut protists and bacteria. The genus exhibits complex social organization with distinct castes including reproductives, soldiers, and pseudergates. Species identification relies on subsidiary tooth morphology in non-soldier castes, a more reliable method than soldier-based characteristics.
Zootermopsis nevadensis
Nevada Dampwood Termite, Nevada Termite
Zootermopsis nevadensis is a eusocial dampwood termite in the family Archotermopsidae, native to the western United States. It is a hemimetabolous species with complex caste differentiation including workers, soldiers, alates, and neotenic reproductives. The species has been extensively studied for its genomic characteristics, including exceptionally high DNA methylation levels and reduced opsin genes associated with its subterranean lifestyle. Two subspecies are recognized: Z. n. nevadensis and Z. n. nuttingi, with the latter having its genome sequenced.
Zootermopsis nevadensis nevadensis
damp-wood termite, Nevada dampwood termite
Zootermopsis nevadensis nevadensis is a lower termite subspecies inhabiting cooler coastal and higher elevation areas of the western United States. It lives entirely within damp wood and does not forage outside its gallery system. The species exhibits hemimetabolous development with multiple progressive juvenile instars that function as workers. These workers retain developmental plasticity, capable of differentiating into alates (winged reproductives), neotenic reproductives, or soldiers depending on colony needs. The subspecies possesses exceptionally high levels of DNA methylation compared to other insects, with methylation patterns more similar to non-insect invertebrates than to holometabolous insects.
Zootermopsis nevadensis nuttingi
Zootermopsis nevadensis nuttingi is a subspecies of dampwood termite in the family Archotermopsidae, described by Haverty & Thorne in 1989. It inhabits coastal forests of the western United States where it contributes to wood decomposition through specialized hindgut symbionts. The subspecies is distinguished from other Z. nevadensis populations by morphological and geographic characteristics. Like other dampwood termites, it requires moist wood substrates and lacks the specialized adaptations for arid environments seen in drywood termites.