Two new species of the genus Allosuctobelba (Acari, Oribatida, Suctobelbidae) from China Author Zheng, Li-Hao Guang’an Vocational and Technical College, Guang’an 638000, China. & Key Laboratory of Zoological Systematics and Evolution, Institute of Zoology, Chinese Academy of Sciences, Beijing 100101, China. Author Duan, Hong-Bin Xinyang Agriculture and Forestry University, Xinyang, 464000, China. Author Chen, Jun Key Laboratory of Zoological Systematics and Evolution, Institute of Zoology, Chinese Academy of Sciences, Beijing 100101, China. & College of Life Sciences, University of Chinese Academy of Sciences, Beijing, 100049, China. text Zootaxa 2024 2024-12-23 5556 1 132 143 https://doi.org/10.11646/zootaxa.5556.1.12 journal article 10.11646/zootaxa.5556.1.12 1175-5326 14595052 E798B9DE-7847-4BA7-8E4C-5AD97143481F Allosuctobelba ( Allosuctobelba ) polita Zheng & Chen sp. nov. *吻异Ħựşdz ( Figs 1–5 ) Diagnosis Body size: 410–490 × 240–300. Rostrum pointed, without teeth. Rostral seta curved inward and barbed outside sparsely. Bothridial seta spindle-form, with long setiform tip (tip slightly barbed unilaterally). Medial and lateral prodorsal tubercles present. Lateral enantiophysis present. Ten pairs of notogastral setae long, flagellate, setae p shorter than others. Epimeral, genital, anal, and adanal setae smooth. Six pairs of genital setae. Description Measurements ( holotype , male). Body length: 410 ( paratypes , 440–490), notogaster width: 240 ( paratypes , 260–300), setae length: ro 70, le 45, in 40, bs 100, ex 30; notogastral setae range p 1 – p 3 60–80, others 100–120; epimeral setae range 25–30; genital setae range 15–25; ag 30; anal setae range 35–36; adanal setae range 52–57. Mutual distance: c–c 100, la–la 180, lm–lm 110, lp–lp 120, h 2 – h 2 110, h 1 – h 1 25. Integument ( Figs 1–3 ). Body color dark brownish, but legs light brown. Surface of prodorsum granulate (granulation minute on rostrum) while the rest of body surface relatively smooth. Prodorsum ( Figs 1a ; 2 ; 3a, c ). Rostrum pointed, rostral margin smooth. Seta ro curved inward and sparsely barbed outside. Seta le inserted on median knob-like tubercle, smooth, point ahead. Seta in setiform, erect, smooth. Bothridial seta spindle-form, with long stalk, shorter head and setiform tip (tip slightly barbed unilaterally). Exobothridial seta short. Median knob-like tubercle divided. Tectopedial field incomplete. Medial and lateral prodorsal tubercles present. Medial prodorsal tubercle small (somewhat teeth-like distally); lateral prodorsal tubercle simple. Notogaster ( Figs 1a ; 2 ; 3a, c ). L/W of notogaster about 1.04. Anterior margin of notogaster rounded. Ten pairs of notogastral setae long, flagellate, smooth, setae p shorter than others. Setae lm and la nearly on same transverse line. Lyrifissure ip located lateral to p 1 , ips located anterolateral to p 3 , ih located anterior to ips . Opisthonotal gland opening located posterior to lyrifissure im . Epimeral and lateral podosomal regions ( Figs 1b ; 2 ; 3b, c ). Epimeral setal formula: 3-1-3-3, all epimeral setae setiform, smooth, seta 4a inserted at post tip of epimeral plate IV and closer to 4b than to 4c . Chitinous bridge joint present at middle and between epimeral plates I–II, II–III respectively. Discidium triangular. FIGURE 1. Allosuctobelba ( Allosuctobelba ) polita sp. nov. , adult: a—dorsal view (legs not shown); b—ventral view (legs not shown). Scale bar 50 μm. Anogenital region ( Figs 1b ; 2 ; 3b, c ). Six pairs of genital setae setiform, smooth, g 1–4 inserted along inner margin of genital plate, while g 5–6 inserted posteriorly, mutual distances g 5 – g 5 larger than the others. One pair of aggenital, two pairs of anal (mutual distances an 1 – an 1 ≈ an 2 – an 2 ) and three pairs of adanal setae setiform, smooth. Adanal seta ad 1 in posterolateral, ad 2 in lateral ( ad 2 – ad 2 nearly same level with iad–iad ), ad 3 in anterolateral positions to anal opening. Mutual distances ad 2 – ad 2 ≈ ad 3 – ad 3 > ad 1 – ad 1 ≈ ag–ag . Adanal lyrifissure located longitudinal and close to anal aperture, below level of anterior margin of anal opening. Gnathosoma ( Fig 4 ). Subcapitulum size: 90 × 50. Subcapitular setae ( h 23; m , a 19–20) setiform, smooth. Chelicera (length: 88) attenuate-edentate, with smooth seta cha (20) only; movable digit a little longer than immovable digit, without teeth. Palp (length: 55) with setal formula 0-2-1-2-8 (+ω); solenidion pressed to the surface of palp tarsus. Legs ( Fig 5 ). Claw of each leg strong and smooth. Formulas of leg setation and solenidia ( Table 1 ): I (1-5- 2-4-20) [1-2-2], II (1-5-2-4-16) [1-1-2], III (2-3-1-3-15) [1-1-0], IV (1-2-2-3-12) [0-1-0]; homology of setae and solenidia indicated in Table 1 . Seta p eupathidial on leg I and thorn-like on legs II–IV; seta s on tarsus I eupathidial and located between u and a . FIGURE 2. Allosuctobelba ( Allosuctobelba ) polita sp. nov. , adult: lateral view (gnathosoma and legs not shown). Scale bar 100 μm. TABLE 1. Leg setation and solenidia of adult Allosuctobelba ( Allosuctobelba ) polita sp. nov. and A. ( A. ) subiasi sp. nov .

Leg	Tr	Fe	Ge	Ti	Ta
I	v’	d , ( l ), bv” , v’	( l ), σ	( l ), ( v ), φ1, φ2	( ft ), ( tc ), ( it ), ( p ), ( u ), ( a ), s , ( pv ), v’ , ( pl ), l” , ε, ω 1, ω 2
II	v’	d , ( l ), bv” , v”	( l ), σ	( l ), ( v ), φ	( ft ), ( tc ), ( it ), ( p ), ( u ), ( a ), s , ( pv ), l” , ω1, ω2
III	l’ , v’	d , l’ , ev’	l’ , σ	l’ , ( v ), φ	( ft ), ( tc ), ( it ), ( p ), ( u ), ( a ), s , ( pv )
IV	v’	d , ev’	d , l’	l’ , ( v ), φ	ft” , ( tc ), ( p ), ( u ), ( a ), s , ( pv )

Note: Roman letters refer to normal setae, Greek letters to solenidia (except ɛ = famulus). Single prime (’) marks setae on the anterior and double prime (”) setae on the posterior side of a given leg segment. Parentheses refer to a pair of setae. Material examined Holotype : male (ZLH-20-113): China , Henan Province , Xinyang City , Shihe District , Jigong Mountain , 31°48′13″N , 114°4′25″E , 726 m a.s.l. , in soil under mixed forest, 4.VII.2020 . Paratypes : seven males and four females (ZLH-20-120): same as holotype , 31°48′47″N , 114°4′36″E , 442 m a.s.l., in soil under bamboo, 4.VII.2020 ; one male (ZLH-20-122): same as holotype , 31°48′52″N , 114°4′19″E , 358 m a.s.l., in moss, 5.VII.2020 ; two females (ZLH-20-180): China , Henan Province , Xinyang City , Shangcheng County , Suxianshi Town , Xihe Village , Dabieshan Natural Reserve , 31°43′28″N , 115°32′24″E , 600 m a.s.l. , in soil under broad-leafed forest, 17.VII.2020 . All the specimens were collected by Lihao Zheng. Type deposition The type specimens are deposited in the collection of IZAS. Etymology The specific name “ polita ” refers to the smooth out ridge of rostrum that without teeth. Remarks FIGURE 3. Allosuctobelba ( Allosuctobelba ) polita sp. nov. , adult: a—dorsal view; b—ventral view; c—lateral view. Scale bars 50 μm. FIGURE 4. Allosuctobelba ( Allosuctobelba ) polita sp. nov. , adult: a—subcapitulum, ventral view; b—right palp, abaxial view; c—left chelicera, adaxial view. Scale bars: a 30 μm; b, c 20 μm. The new species is most similar with A. ( A. ) alexanderkhaustovi Ermilov & Starý, 2018 from Northern Vietnam in the shape of bothridial seta (spindle-form, with long stalk, shorter head and setiform tip) and notogastral setae (long and flagellate), presence of medial and lateral prodorsal tubercles. However, the new species is distinguished from the later by: rostrum without lateral teeth ( vs. with three pairs of lateral teeth), median knob-like tubercle present ( vs. absent), notogastral setae la and lm nearly same row ( vs. setae la and lm nearly same column), notogastral setae p shorter than others ( vs. notogastral setae nearly same in length). The new species is also similar with A. ( A. ) tricuspidata Aoki, 1984 , A. ( A. ) serrata ( Chinone, 2003 ) , A. ( A. ) nova (Krivolutsky, 1971) , A. ( A. ) malakipinae ( Corpuz-Raros, 1979 ) , A. ( A. ) grandis ( Paoli, 1908 ) in the shape of the bothridial seta, but differs from them by the absence ( vs. presence) of the rostral teeth.