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Additional file 1.

Trimeroptes longlinensis sp. nov. (Figs. 5���6) Description. Female (n=13): Body fusiform, light yellowish, 174 (162���186), 68 (68���72) wide, 72 (70���75) thick, dorsally covered with white wax. Gnathosoma 36 (35���38), projecting downwards, setae ep 3 (2���3), setae d 12 (11���12); setae v 2 (2���3); cheliceral stylets 45 (43���46). Prodorsal shield 50 (50���52), including frontal lobe, 55 (53���57) wide; shield design with few interrupted lines in median part; frontal lobe 14 (14���16) over gnathosomal base; scapular tubercles placed ahead rear shield margin, 27 (27���29) apart, setae sc 17 (17���18), directed upward. Coxisternal plates with several short lines and distinct dashes; setae 1b 15 (13���16), 15 (14���16) apart; setae 1a 14 (14���15), 10 (9���10) apart; setae 2a 24 (22���25), 28 (27���30) apart. Coxigenital semiannuli 19 (19���22), microtuberculated. Legs: Six segments, lacking setae on both femora. Leg І 43 (42���45), trochanter 3*, femur 14 (14���15), setae bv absent; genu 5*, setae l'' 34 (30���35); tibia 13 (13���14), setae l��� located at 3/4 from dorsal base, 6 (6���7); tarsus 8 (7���8), tarsal setae ft' 23 (23���25), tarsal setae ft'' 25 (24���27), tarsal setae u' 5 (4���5); tarsal empodium em, divided, 6 (6���7), 5-rayed*, tarsal solenidion �� 7 (6���7), knobbed. Leg ІІ 41 (39���42), trochanter 3*, femur 14 (13���14), setae bv absent; genu 5*, setae l'' 10 (10���12); tibia 12 (11���12); tarsus 7 (7���8), tarsal setae ft' 7 (6���7), tarsal setae ft'' 22 (20���23), tarsal setae u' 4 (4���5); tarsal empodium em, divided, 7 (6���7), 5-rayed*, tarsal solenidion �� 7 (6���7), knobbed. Opisthosoma: dorsal opisthosoma with one median and two lateral ridges, median ridge divided at anterior 6���7 annuli; dorsal annuli 41 (40���42), smooth; ventral annuli 98 (97���102), with round microtubercles on rear annular margins, last 11 (11���12) ventral semiannuli with elongated microtubercles; setae c2 18 (17���20), 61 (60���62) apart, on ventral annulus 31 (31���32); setae d 56 (51���58), 42 (42���43) apart, on ventral annulus 50 (49���51); setae e 14 (12���14), 21 (20���21) apart, on ventral annulus 68 (68���70); setae f 30 (28���31), 20 (20���21) apart, on 7 th ventral annulus from the rear; setae h1 absent, setae h2 95 (91���97), 7 (6���7) apart. Female genitalia: 16 (16���18), 31 (30���32) wide; coverflap with 8 (8���10) longitudinal striae; setae 3a 10 (9���11), 19 (19���20) apart. Male (n=4): Smaller than females and generally similar to them. Body fusiform, light yellowish, 140���146, 58���60 wide. Gnathosoma 34���35, setae ep 2*, setae d 10���11; setae v 2���3; cheliceral stylets 45���46. Prodorsal shield 38���42, including frontal lobe, 48���50 wide; frontal lobe 10���12; scapular tubercles placed ahead rear shield margin, 26���27 apart, setae sc 15���16, directed upward. Coxisternal plates, setae 1b 13���14, 12���13 apart; setae 1a 14*, 8���9 apart; setae 2a 23���25, 25���27 apart. Coxigenital semiannuli 14���16, microtuberculated. Leg І 40���41, trochanter 3*, femur 13*, setae bv absent; genu 5*, setae l'' 31���33; tibia 12���13, setae l��� located at 3/4 from dorsal base, 4���5; tarsus 7*, tarsal setae ft' 19���21, tarsal setae ft'' 18���22, tarsal setae u' 4���5; tarsal empodium em, divided, 6*, 5-rayed*, tarsal solenidion �� 6���7, knobbed. Leg ІІ 39���41, trochanter 3*, femur 13���14, setae bv absent; genu 5*, setae l'' 8���9; tibia 11*; tarsus 7���8, tarsal setae ft' 6���7, tarsal setae ft'' 21���23, tarsal setae u' 4���5; tarsal empodium em, divided, 6*, 5- rayed*, tarsal solenidion �� 6���7, knobbed. Opisthosoma: dorsal annuli 40���41, ventral annuli 79���83; setae c2 14���15, 54���56 apart, on ventral annulus 22���23; setae d 47���50, 40���41 apart, on ventral annulus 34���36; setae e 11���12, 20* apart, on ventral annulus 52���54; setae f 25���26, 19���20 apart, on 7 th ventral annulus from the rear; setae h1 absent, setae h2 93���96. Male genitalia: 23���24 wide; setae 3a 7���8, 19���20 apart. Type material. Holotype: female (slide number EDD3-3.1), Jinzhongshan National Nature Reserve, Longlin County, Baishe City, Guangxi Zhuang Autonomous Region, P. R. China, 24��37���2���N, 104��57���3���E, elevation 1800m, 1 July 2020, from Carpinus sp. (Betulaceae), collected by Mengchao Tan & Ping Zhao. Paratypes: 12 females and 4 males (slide number EDD3-3.2~3.17), with the same data as the holotype. Relation to host. The mite found to be vagrant on the undersurfaces of leaves of their associated host causing no visible damage. Etymology. The specific name longlinensis refers to the ���Longlin County���, the locality where the holotype was collected. The gender is masculine. Differential diagnosis. The new species is morphologically similar to Trimeroptes luanchuanensis Xue & Hong, 2005, based on the setae h1 absent, coxisternal plates with short lines. The differences between two species are the following: prodorsal shield with few interrupted lines in the median part in T. longlinensis sp. nov. (versus prodorsal shield smooth in T. luanchuanensis); number of dorsal annuli and ventral annuli 40 to 42 and 97 to 102, respectively, in T. longlinensis sp. nov. (versus 38 and 66, respectively, in T. luanchuanensis), ray number of em 5 in T. longlinensis sp. nov. (versus 3 in T. luanchuanensis), number of longitudinal striae on coverflap 8 to10 in T. longlinensis sp. nov. (versus 14 in T. luanchuanensis), length of setae d 51���58 ��m in T. longlinensis sp. nov. (versus 35 ��m in T. luanchuanensis)., Published as part of Tan, Meng-Chao, Lv, An-Kang, Ruan, Hong-Yan & Zhao, Ping, 2021, Two new Diptacus and one new Trimeroptes species (Acari: Diptilomiopidae) from China, pp. 224-236 in Zootaxa 5067 (2) on pages 232-235, DOI: 10.11646/zootaxa.5067.2.4, http://zenodo.org/record/5677867, {"references":["Xue, X. - F. & Hong, X. - Y. (2005) Five new species of Diptilomiopidae from China (Acari: Eriophyoidea). Zootaxa, 1055 (1), 49 - 59. https: // doi. org / 10.11646 / zootaxa. 1055.1.4"]}

Genus: Diptacus Keifer, 1951 Diagnosis. Body fusiform, gnathosoma large, chelicerae abruptly bent down; anterior shield lobe present; scapular tubercles set ahead of rear shield margin, scapular setae projecting up or ahead or centrad; coxae with three pairs of setiferous tubercles and setae; femoral setae absent; empodium divided; opisthosoma with a weak ridge; all ventral setae present., Published as part of Tan, Meng-Chao, Lv, An-Kang, Ruan, Hong-Yan & Zhao, Ping, 2021, Two new Diptacus and one new Trimeroptes species (Acari: Diptilomiopidae) from China, pp. 224-236 in Zootaxa 5067 (2) on page 225, DOI: 10.11646/zootaxa.5067.2.4, http://zenodo.org/record/5677867, {"references":["Keifer, H. H. (1951) Eriophyid studies. XVII. Bulletin of the California Department of Agriculture, 40, 93 - 104."]}

Diptacus suichangensis sp. nov. (Figs. 1–2) Description. Female (n=14): Body fusiform, light yellow, 242 (205–251), 80 (72–82) wide, 55 (50–55) thick. Gnathosoma 43 (40–43), projecting downwards, pedipalp coxal setae ep 3 (2–3), dorsal pedipalp genual setae d 14 (14–15), unbranched; subapical pedipalp tarsal setae v 3 (2–3); cheliceral stylets 55 (53–55). Prodorsal shield 47 (40–47), including frontal lobe, 58 (55–60) wide; frontal lobe 15 (15–17) over gnathosomal base, slightly emarginate anteriorly; median line complete and reaching rear margin of the shield, admedian lines complete and sinuose, median and admedian lines joined by transverse lines, forming four cells in the middle of shield, submedian present on about posterior half of the shield between scapular tubercles and posterior rear of the shield; scapular tubercles placed ahead rear shield margin, 28 (26–29) apart, scapular setae sc 13 (13–15), directed upward. Coxisternal plates with several short lines and distinct dashes; prosternal apodeme 9 (8–11), anterolateral setae on coxisterna І 1b 19 (18–21), 16 (15–18) apart; proximal setae on coxisterna І 1a 29 (27–32), 8 (7–8) apart; proximal setae on coxisterna ІІ 2a 46 (44–48), 32 (30–32) apart. Coxigenital semiannuli 15 (13–15), microtuberculated. Legs: Six segments, lacking setae on both femora. Leg І 55 (54–57), trochanter 3 (3–4), femur 16 (15–16), basiventral femoral setae bv absent; genu 7 (7–8), antaxial genual setae l'' 38 (36–41); tibia 19 (19–20), paraxial tibial setae l′ located at 1/2 from dorsal base, 12 (11–12); tarsus 10 (10–11), paraxial fastigial tarsal setae ft' 25 (25–27), antaxial fastigial tarsal setae ft'' 26 (26–28), paraxial unguinal tarsal setae u' 5 (4–5); tarsal empodium em, divided, 6 (6–7), 5-rayed*, tarsal solenidion ω 7 (6–7), knobbed. Leg ІІ 49 (48–51), trochanter 3*, femur 15 (15–16), setae bv absent; genu 7 (6–7), setae l'' 16 (14–16); tibia 15 (15–17); tarsus 9 (9–10), tarsal setae ft' 7 (6–7), tarsal setae ft'' 26 (26–28), tarsal setae u' 5 (4–5); tarsal empodium em, divided, 6 (6–7), 5-rayed*, tarsal solenidion ω 7 (7–8), knobbed. Opisthosoma: dorsal opisthosoma with central dorsal ridge and subdorsal ridges, all the ridges ending at rear; dorsal annuli 70 (68–70), smooth; ventral annuli 115 (112–116), with round microtubercles on rear annular margins except posterior 11 (11–12) annuli with elongated and linear microtubercles; setae c2 28 (25–28), 70 (68–71) apart, on ventral annulus 26 (23–26); setae d 62 (60–67), 50 (48–51) apart, on ventral annulus 52 (49–52); setae e 26 (24–26), 27 (25–28) apart, on ventral annulus 80 (76–80); setae f 49 (46–49), 31 (30–33) apart, on 12 th ventral annulus from the rear; setae h1 1*, setae h2 121 (115–123), 12 (12–13) apart. Female genitalia 20 (18–21), 30 (29–30) wide; coverflap with 13 (12–14) longitudinal striae; proximal setae on coxisterna ІІІ (3a) 13 (12–13), 22 (20–23) apart. Male (n=3): Smaller than females and generally similar to them. Body fusiform, light yellowish, 158–163, 58–64 wide. Gnathosoma 40–42, setae ep 2–3, setae d 13–14; setae v 2–3; cheliceral stylets 50–51. Prodorsal shield 37–40, including frontal lobe, 48–50 wide; frontal lobe 13–15; scapular tubercles placed ahead rear shield margin, 24–26 apart, setae sc 8–10, directed upward. Coxisternal plates, setae 1b 15–16, 14–15 apart; setae 1a 17–18, 7–8 apart; setae 2a 37–45, 20–23 apart. Coxigenital semiannuli 15–17, microtuberculated. Leg І 48–50, trochanter 3*, femur 15*, setae bv absent; genu 5–6, setae l'' 35–37; tibia 17*, setae l′ located at 1/2 from dorsal base, 10–11; tarsus 8–9, tarsal setae ft' 24–26, tarsal setae ft'' 24–25, tarsal setae u' 4*; tarsal empodium em, divided, 6*, 5-rayed*, tarsal solenidion ω 6–7, knobbed. Leg ІІ 42–44, trochanter 3*, femur 15*, setae bv absent; genu 5*, setae l'' 12–13; tibia 12–13; tarsus 7–8, tarsal setae ft' 5–6, tarsal setae ft'' 24–25, tarsal setae u' 4*; tarsal empodium em, divided, 6*, 5- rayed*, tarsal solenidion ω 6–7, knobbed. Opisthosoma: dorsal opisthosoma with central dorsal ridge and subdorsal ridges; dorsal annuli 68–70; ventral annuli 104–108; setae c2 21–23, 48–52 apart, on ventral annulus 21*; setae d 62–64, 31–34 apart, on ventral annulus 41–43; setae e 23–24, 18–20 apart, on ventral annulus 61–65; setae f 42–45, 22–25 apart, on 12 th ventral annulus from the rear; setae h1 2*, setae h2 105–107. Male genitalia: 23–25 wide; setae 3a 11–12, 15–16 apart. Type material. Holotype: female (slide number EDD3-2.1), Jiulongshan National Nature Reserve, Suichang County, Lishui City, Zhejiang Province, P. R. China, 28°19′21″N, 118°49′15″E, elevation 650m, 27 Sept. 2019, from Aralia chinensis L. (Araliaceae), collected by Mengchao Tan. Paratypes: 13 females and 3 males (slide number EDD3-2.2~2.17), with the same data as holotype. Relation to host. The mite found to be vagrant on the undersurfaces of leaves of their associated host causing no visible damage. Etymology. The specific name suichangensis refers to the “Suichang County”, the locality where the holotype was collected. The gender is male. Differential diagnosis. Diptacus hederiphagus Nuzzaci, 1975 and the new species are the only two Diptacus species that have been reported on plants of the family Araliaceae. The new species differs from D. hederiphagus in the prodorsal shield pattern (complete median line in D. suichangensis sp. nov. versus incomplete median line in D. hederiphagus), length of scapular setae sc (13–15 in D. suichangensis sp. nov. versus 2 in D. hederiphagus), and number of dorsal semiannuli and ventral semiannuli (68–70, 112– 116 in D. suichangensis sp. nov. versus 55, 80 in D. hederiphagus). In addition, D. suichangensis sp. nov. appears to be morphologically close to Diptacus chizhouensis Wang, Xue & Hong, 2009 [found on Rubus corchorifolius Linn. f. (family Rosaceae) from Anhui, China]. They share similar characters such as coxisternal plates with fine dashes, empodium rays number (5), coverflap with striae, dorsal annuli smooth. However, these two species can be differentiated by the number of the dorsal annuli (68–70 in D. suichangensis sp. nov. versus 44–47 in D. chizhouensis), the number of the ventral annuli (112–116 in D. suichangensis sp. nov. versus 68–73 in D. chizhouensis), the length of the setae f (46–49 in D. suichangensis sp. nov. versus 28–31 in D. chizhouensis), the median line on prodorsal shield (complete median line in D. suichangensis sp. nov. versus incomplete median line in D. chizhouensis). The new species is also close to Diptacus elegantulum Rajput, Han, Xue & Hong, 2014 [collected from Acer elegantulum Fang & Chiu (Sapindaceae)] in prodorsal shield design (admedian lines complete, median and admedian lines joined by transverse lines, forming cells in the middle of shield), coxisternal plates I (with short lines and granules), and coverflap design (with longitudinal ridges). The two species differ in the following features: prodorsal shield with complete median line in D. suichangensis sp. nov. versus incomplete (versus broken median line in D. elegantulum); scapular tubercles ahead of the rear shield margin in D. suichangensis sp. nov (versus near rear shield margin in D. elegantulum); tarsal empodium 5-rayed in D. suichangensis sp. nov. (versus 3-rayed in D. elegantulum); dorsal opisthosoma with smooth annuli in D. suichangensis sp. nov. (versus microtuberculated annuli in D. elegantulum).

Genus: Trimeroptes Keifer, 1951 Diagnosis. Body fusiform, gnathosoma large, chelicerae abruptly bent down; shield with a broad frontal lobe extending over the rostrum base and emarginate apically, scapular tubercles ahead of the rear shield margin and directing setae forward; coxae with three pairs of setae; the femoral setae absent, empodium divided; dorsal opisthosoma with three ridges, median ridge divided for a short distance behind prodorsal shield, all ventral setae present., Published as part of Tan, Meng-Chao, Lv, An-Kang, Ruan, Hong-Yan & Zhao, Ping, 2021, Two new Diptacus and one new Trimeroptes species (Acari: Diptilomiopidae) from China, pp. 224-236 in Zootaxa 5067 (2) on page 232, DOI: 10.11646/zootaxa.5067.2.4, http://zenodo.org/record/5677867, {"references":["Keifer, H. H. (1951) Eriophyid studies. XVII. Bulletin of the California Department of Agriculture, 40, 93 - 104."]}