Xylos-9

「ダストマイト（*Litho-granum*）」は、キシロス9の希薄真空成層圏に固有の微小な草食生物である。屈折性シリカ甲羅に包まれたこれらの生物は、高高度の塵雲内を漂流し、栄養源として微粒子状ケイ酸塩を濾過している。その六角形の外骨格は淡い太陽光を反射するため、群れを成すまで琥珀色の霞の中でほとんど目立たない。 個体は頻繁に「サーマル・ウィーブ」の格子構造に固定される。これは局所的大気温度を安定させる人工構造物である。ここで彼らは密集した生きた絨毯を形成し、浮遊する微粒子を摂食しながら残留熱を収集する。この共生による付着は、彼らが致死性の上部真空へと拡散するのを防ぎ、ステーションの熱調節および塵濾過システムに不可欠な脆弱なバイオフィルムを生み出している。

Thermovora parasitus manifests as a translucent, vein-like film on the underside of Xylos-9's Thermal-Weave organisms. This epibiotic bacterium infiltrates the host's micro-capillaries to siphon thermal gradients essential for cellular metabolism. In the thin vacuum of high-altitude zones, where ambient heat is scarce, the parasite creates localized cold spots, causing immediate tissue necrosis in its host while sustaining its own rapid replication cycle through stolen energy fluxes. Infested specimens exhibit a distinct frost-bloom pattern along their dorsal ridges as internal temperatures plummet. Without intervention, the Thermal-Weave's metabolic processes freeze within hours, leading to structural collapse of the host's protein lattice. Field researchers recommend immediate cryo-scraping of infestation sites, though removal often proves fatal due to the irreversible thermal shock inflicted during the parasite's initial energy theft.

The Surface-Crawler, or Terra-stalker, thrives in Xylos-9's thin upper atmosphere, utilizing six elongated, multi-jointed legs to traverse rocky regolith with minimal contact. Its carapace reflects ultraviolet radiation for thermal regulation, while specialized sensors detect minute heat signatures of drifting Thermal-Weave fragments. In low gravity, the creature moves with fluid precision, conserving energy between brief, explosive bursts of movement needed to navigate the planet's jagged highlands. Occasionally, these arachnids launch themselves into the jet stream, using aerodynamic body flattening to glide toward floating organic debris. With a sudden leap, they snatch smaller Thermal-Weave fragments from the air currents before gravity reclaims them. This unique aerial foraging strategy allows survival where ground resources are sparse, turning turbulent wind layers into a dynamic hunting ground for this agile, high-altitude predator.