taxonID	type	description	language	source
713C9ACE1E895586A3830EDDEA773005.taxon	type_taxon	Type species. Cretachyzeria macroseta sp. nov.	en	Liu, Yu, Fan, Qing-Hai, Ren, Dong (2025): A Cretaceous mite with ultra-long setae possibly reveals the early survival strategy of Chyzeriidae. Fossil Record 28 (2): 241-248, DOI: 10.3897/fr.28.e158587
713C9ACE1E895586A3830EDDEA773005.taxon	diagnosis	Diagnosis. Active postlarval form: Prodorsum bears dense and relatively short setae, narrowing anteriorly; crista metopica located in the middle region near leg I, sensillary area oval. Two pairs of eyes on the edge of prodorsum and positioned near the base of leg II. Hysterosoma with 2 pairs of large cylindrical protrusions at the level of leg III, bearing extremely long and dense setae that cover the entire posterior dorsum and extend far beyond the posterior edge of dorsum. Ventral surface with dense and relatively short setae; genital opening slit-like, located posterior to leg IV coxae, surrounded by a pair of sclerites (genital cover flaps). Palps slender and elongated, bearing dense setae; tibial claw well developed, smooth, the end curved into a knife shape; tarsus elongated, slender at base, then gradually widens, and the end circular. Legs long and slender, each tarsus with a pair of smooth claws.	en	Liu, Yu, Fan, Qing-Hai, Ren, Dong (2025): A Cretaceous mite with ultra-long setae possibly reveals the early survival strategy of Chyzeriidae. Fossil Record 28 (2): 241-248, DOI: 10.3897/fr.28.e158587
713C9ACE1E895586A3830EDDEA773005.taxon	etymology	Etymology. The generic epithet Cretachyzeria is a combination of the prefix Cret-, referring to the Cretaceous period, and the modern genus name Chyzeria (the type genus of the family Chyzeriidae).	en	Liu, Yu, Fan, Qing-Hai, Ren, Dong (2025): A Cretaceous mite with ultra-long setae possibly reveals the early survival strategy of Chyzeriidae. Fossil Record 28 (2): 241-248, DOI: 10.3897/fr.28.e158587
3824A8DE4BCF5787A05C0F6618DD6E44.taxon	description	Figs 1, 2	en	Liu, Yu, Fan, Qing-Hai, Ren, Dong (2025): A Cretaceous mite with ultra-long setae possibly reveals the early survival strategy of Chyzeriidae. Fossil Record 28 (2): 241-248, DOI: 10.3897/fr.28.e158587
3824A8DE4BCF5787A05C0F6618DD6E44.taxon	diagnosis	Diagnosis. As for the genus.	en	Liu, Yu, Fan, Qing-Hai, Ren, Dong (2025): A Cretaceous mite with ultra-long setae possibly reveals the early survival strategy of Chyzeriidae. Fossil Record 28 (2): 241-248, DOI: 10.3897/fr.28.e158587
3824A8DE4BCF5787A05C0F6618DD6E44.taxon	description	Description. Active postlarval form, female (?). Maximum length (gnathosoma and idiosoma) 2466; gnathosoma 783; idiosoma 1683; maximum width 1069. Idiosoma dorsum (Fig. 1 A, C). Idiosoma suboval, narrowing anteriorly, anterior margin nearly truncate, and widest between bases of legs II and III; nearly parallel between legs III and IV. Posterior rounded, visible on venter. Prodorsum partly obscured by large bubble, remaining areas discernible; dense and short setae present, setal shape and base unclear due to impurities. Faint crista metopica (Fig. 2 A) in middle region near leg I, anterior and posterior extension not visible. Sensillary area oval, sensilla blurry. Two pairs of eyes (Fig. 2 A) at anterior edge, near base of leg II. Two pairs of large cylindrical protrusions (Fig. 2 C) at level of leg III, with tiny gaps between. Protrusions bear extremely long and dense setae (1800 long), covering entire hysterosoma and extending beyond posterior edge, rendering area invisible. Idiosoma venter (Fig. 1 B, D). A complete outline visible, same as dorsum. Front part and lower right corner obscured by bubbles. Entire ventral surface covered with dense and relatively short setae, resembling anterior dorsum. Genital opening (Fig. 2 B) slit-like, 276 long, located after leg IV coxae, surrounded by paired sclerites, each sclerite covered with setae. Anus blurred and equivocal. Gnathosoma (Fig. 2 D, E). Chelicera not visible. Palps slender and significantly elongated, 530 long, base extending downward. Palps with dense setae, divided into 5 segments; trochanter not visible; femur longest, distal part thick; genu slender, base narrower than distal part of femur; tibia short, similar in width to genu, tibial claw well developed, smooth, and knife-shaped distally; tarsus elongated, slender at base, then gradually widens, and the end circular. Legs (Figs 1, 2 F, G, H). Long and slender; legs I and IV slightly longer than legs II and III. All legs with 7 segments (femur divided into basifemur and telofemur). Coxa and trochanter of legs approximately square; basifemur thicker, tapered distally, with an obvious middle groove; telofemur, genu, tibia, and tarsus cylindrical, tapering from telofemur to tarsus. Legs II-IV with strong, smooth, hook-shaped tarsal claws (Fig. 2 F, G, H); leg I claws undiscernible (likely to have been present). Lengths of legs and segments: leg I 2093, coxa I 133, trochanter I 112, basifemur I 347, telofemur I 352, genu I 313, tibia I 373, tarsus I 463; leg II 1639, coxa II 138, trochanter II 112, basifemur II 207, telofemur II 327, genu II 226, tibia II 262, tarsus II 367; leg III 1557, coxa III 131, trochanter III 111, basifemur III 282, telofemur III 220, genu III 201, tibia III 279, tarsus III 333; leg IV 1932, coxa IV 245, trochanter IV 158, basifemur IV 329, telofemur IV 235, genu IV 236, tibia IV 387, tarsus IV 342.	en	Liu, Yu, Fan, Qing-Hai, Ren, Dong (2025): A Cretaceous mite with ultra-long setae possibly reveals the early survival strategy of Chyzeriidae. Fossil Record 28 (2): 241-248, DOI: 10.3897/fr.28.e158587
3824A8DE4BCF5787A05C0F6618DD6E44.taxon	etymology	Etymology. The specific epithet macroseta is a combination of macro- (macros, meaning long) and seta (bristle), referring to this species having extremely long bristles.	en	Liu, Yu, Fan, Qing-Hai, Ren, Dong (2025): A Cretaceous mite with ultra-long setae possibly reveals the early survival strategy of Chyzeriidae. Fossil Record 28 (2): 241-248, DOI: 10.3897/fr.28.e158587
