identifier	taxonID	type	CVterm	format	language	title	description	additionalInformationURL	UsageTerms	rights	Owner	contributor	creator	bibliographicCitation
AAC700BFF1AE5BA2B9FA389C192D6E62.text	AAC700BFF1AE5BA2B9FA389C192D6E62.taxon	http://purl.org/dc/dcmitype/Text	http://rs.tdwg.org/ontology/voc/SPMInfoItems#GeneralDescription	text/html	en	Deuterothyas crescentis Zhan & Guo 2026	<div><p>Deuterothyas crescentis Zhan &amp; Guo sp. nov.</p><p>Figs 9 A – D, 10–18</p><p>Type material.</p><p>• Holotype: male, <a href="https://tb.plazi.org/GgServer/search?materialsCitation.longitude=118.70416&amp;materialsCitation.latitude=26.27861" title="Search Plazi for locations around (long 118.70416/lat 26.27861)">Tangxia Village</a>, Xiongjiang Town, Minqing County, Fuzhou City, Fujian Province, P. R. China (26°16'43"N, 118°42'15"E; 302 m a. s. l.), leg. Bao-Xiang Zhan, Lan Ja &amp; Dong-Mei Liu, 06-VII-2024, Slide No. FJ - HYDRY - 2024070601 . • Paratypes: 4 ♂, 4 ♀, same locality and data as holotype, Slide No. FJ - HYDRY - 2024070602 –2024070609; 1 ♂, same locality as holotype, leg. Bao-Xiang Zhan, 09-IX-2025, Tube No. FJ-HYDRY-2025090901 .</p><p>Habitat.</p><p>Subtropical evergreen broad-leaved forest, with green algae on the banks of a rapid stream. (Fig. 9 A – D).</p><p>Etymology.</p><p>“ crescentis ” comes from Latin, meaning “ growth, ” the new species is named for the secondary sclerotization that grows under its integument as it matures.</p><p>Diagnosis.</p><p>Integument papillae ends rounded, with folds between papillae. Prefrontalia, postfrontalia, Dc 1 and Dc 2 fused to median eye plate; Dc 3 fused with each other, and this situation also occurs randomly among Dc 4–5. Genital flaps divided into three pairs, the first and third pairs small, the second pair triangular; postgenital sclerite small. Male. Fully mature adult with a large porous secondary sclerotization appeared under the integument, extending from the frontal margin to posterior margin of the idiosoma, but not enclosing the eye capsules, D 1 – D 4, V 4 and slit organs; pregenital sclerite small. Female. The porous secondary sclerotization under the fully mature adult integument grow from the median eye plate and Dc 3–5 and extend outward laterally; pregenital sclerite arrow-shaped.</p><p>Description.</p><p>Living habitus: Idiosoma color red, with the sclerotized structure under the integument, sometimes with green algae attached to the dorsal integument; lateral eyes red; palps and legs orange (Fig. 10 A – F). Integument papillae rounded, with folds between the papillae (Fig. 11 E – G). Male (n = 6). Dorsal view: median eye plate approximately shield-shaped, formed by the fusion of the prefrontalia, postfrontalia, Dc 1 and Dc 2; median eye and O 2 located on the median eye plate, with the median eye positioned anterior to the connection line of O 2; Dc 3 fused with each other, and this situation also occurs randomly among Dc 4–5; Dl 1 –4 large, nearly rounded (Figs 11 A, 12 A). Young adult only with dorsalia at the idiosoma surface, while a large porous secondary sclerotization appeared under the integument of the fully mature adult. The two sides of the secondary structure almost parallel, extending from the frontal margin to the posterior margin of the idiosoma, but not enclosing the eye capsules, D 1 – D 4, V 4 and slit organs (Figs 12 A, 13 A). Ventral view: coxae in four groups; the tip of coxae with several pairs of short, thick setae; posterolateral corners of Cx-II and Cx-III with several pairs of long, thick setae; excretory pore circular, with a thickened and sclerotized margin; a pair of ventral plates lateral to the excretory pore (Figs 12 B, 13 B). Pregenital sclerite and postgenital sclerite small; genital field with three pairs of acetabula; genital flaps divided into three pairs; the first pair small, located on the anteromedial side of Ac 1 and with two pairs of setae; the second pair triangular, located on the medial side of Ac 2 and with 7–11 pairs of setae; third pair very small, located on the medial side of Ac 3 and with 1–3 pairs of setae (Figs 11 C, 12 F, 13 E). Lateral view: So 1 – So 3 located on the front side of Dc 1 – Dc 3; So 4 on the side of Dc 4, So 5 in front of Dc 5 (Figs 12 C, 13 C). Frontal view: A 2 located lateral to the eye capsules (Figs 12 D, 13 D). Posterior view: So 5 lateral to V 4 (Fig. 12 E).</p><p>Gnathosoma with a short rostrum and two pairs of setae (Figs 12 G – H, 13 F – G, 14 A). Palp five-segmented; P- 1 short, with one dorsal seta; P- 2 with four dorsal and one lateral pinnate setae; P- 3 with two dorsal pinnate setae; P- 4 terminal with three fine setae and a seta-like protrusion; P- 5 short, with some thick setae anteriorly (Figs 12 I, 13 H, 14 B – E). Chelicera shape conventional, chelicera claw concave on lateral side, with a row of teeth on medial side (Figs 12 J, 13 I, 14 F – I).</p><p>Legs robust; except for the sixth segments, all segments with a large number of short and stout setae; I – II-L- 6 with both stout and fine short setae anteriorly, and near the dorsal margin in centre with one row of short, fine setae arranged vertically to the leg segments; III – IV-L - 6 with a few long setae anteriorly (Figs 15 A, 15 B, 15 D, 15 E, 15 H, 15 I, 15 K, 15 L, 16 C – F). Claws simple, with a smooth surface without teeth, but lateral and medial sides both with a groove (Fig. 15 G).</p><p>Female (n = 4). General characteristics similar to the male (Figs 17 A – H, 18 A – J). However, the porous secondary sclerotization under the integument of the fully mature adult female is different from the male: the porous secondary sclerotization under the female integument grows from the median eye plate and Dc 3–5 and extends laterally (Figs 11 B, 11 F, 11 G, 17 A – C, 17 E – H, 18 A – E, 18 G – L). Genital field longer than in male; pregenital sclerite arrow-shaped (Figs 11 D, 17 D, 18 F). Legs similar to male except I – II-L- 6 with less setae (Figs 15 C, 15 F, 15 J, 16 A – B, 16 G – L).</p><p>Measurements.</p><p>Male (n = 4) and female (n = 4). See Table 2 for details.</p><p>Remarks.</p><p>Adults of Deuterothyas crescentis Zhan &amp; Guo, sp. nov. develop porous secondary sclerotized structures under the integument as they mature. For the fully mature adults, this characteristic can easily distinguish the new species from other species of the genus. However, the young adult with not-yet-developed secondary sclerotization is somewhat similar to Deuterothyas variabilis Lundblad, 1941, but these two species can be differentiated by the following characteristics: (1) in the new species, the median eye plate is formed by the fusion of the prefrontalia, postfrontalia, Dc 1, and Dc 2, whereas in D. variabilis, the median eye plate does not comprise Dc 2; (2) compared to the latter species, the male genital field of the new species is shorter; (3) the second pair of genital flaps is triangular in the new species, while in D. variabilis it is approximately trapezoidal (Lundblad 1969; Cook 1974).</p></div>	https://treatment.plazi.org/id/AAC700BFF1AE5BA2B9FA389C192D6E62	Public Domain	No known copyright restrictions apply. See Agosti, D., Egloff, W., 2009. Taxonomic information exchange and copyright: the Plazi approach. BMC Research Notes 2009, 2:53 for further explanation.		Pensoft via Plazi	Zhan, Bao-Xiang;Smit, Harry;Li, Hai-Tao;Gu, Xin-Yao;Guo, Jian-Jun	Zhan, Bao-Xiang, Smit, Harry, Li, Hai-Tao, Gu, Xin-Yao, Guo, Jian-Jun (2026): Four new species of Euthyadinae Viets, 1931 (Acari, Hydrachnidia, Hydryphantidae) living in water-margin habitats in southern China. Zoosystematics and Evolution 102 (4): 911-941, DOI: 10.3897/zse.102.197692
D8BE7D099BB25CAF9D2121DF7EF109B2.text	D8BE7D099BB25CAF9D2121DF7EF109B2.taxon	http://purl.org/dc/dcmitype/Text	http://rs.tdwg.org/ontology/voc/SPMInfoItems#GeneralDescription	text/html	en	Deuterothyas fujianensis Zhan & Guo 2026	<div><p>Deuterothyas fujianensis Zhan &amp; Guo sp. nov.</p><p>Figs 9 A – E, 27–32</p><p>Type material.</p><p>• Holotype: female, <a href="https://tb.plazi.org/GgServer/search?materialsCitation.longitude=118.70416&amp;materialsCitation.latitude=26.27861" title="Search Plazi for locations around (long 118.70416/lat 26.27861)">Kengdilou Village</a>, Zhuguanlong Town, Shouning County, Ningde City, Fujian Province, P. R. China (26°16'43"N, 118°42'15"E; 393.8 m a. s. l.), leg. Bao-Xiang Zhan, Lan Ja &amp; Dong-Mei Liu, 18-VII-2024, Slide No. FJ - HYDRY - 2024071801 . • Paratypes: 3 ♂, 2 ♀, same data as holotype, Slide No. FJ - HYDRY - 2024071802 –2024071806; 1 ♀, <a href="https://tb.plazi.org/GgServer/search?materialsCitation.longitude=118.70416&amp;materialsCitation.latitude=26.27861" title="Search Plazi for locations around (long 118.70416/lat 26.27861)">Tangxia Village</a>, Xiongjiang Town, Minqing County, Fuzhou City, Fujian Province, P. R. China (26°16'43"N, 118°42'15"E; 302 m a. s. l.), leg. Bao-Xiang Zhan, Lan Ja &amp; Dong-Mei Liu, 06-VII-2024, Slide No. FJ - HYDRY - 2024070631 .</p><p>Habitat.</p><p>Subtropical evergreen broad-leaved forest, with green algae on the banks of rapid streams. (Fig. 9 A – D).</p><p>Etymology.</p><p>The specific epithet refers to the holotype locality: Fujian Province, China; the name is treated as an adjective.</p><p>Diagnosis.</p><p>Integument papillae rounded, with folds between the papillae. Prefrontalia, postfrontalia and Dc 1 fused to median eye plate; the median eye plate with a porous thickening structure underneath the integument. Genital flaps divided into three pairs, the first and third pairs small, the second pair approximately trapezoidal, located between Ac 1 and Ac 2; postgenital sclerite small. Male. Pregenital sclerite small. Female. Pregenital sclerite realively large, somewhat mushroom-shaped.</p><p>Description.</p><p>Integument papillae rounded, with folds between papillae (Fig. 27 G). Female (n = 4). Dorsal view: median eye plate formed by the fusion of the prefrontalia, postfrontalia and Dc 1; median eye and O 2 located on the median eye plate, with the median eye positioned anterior to the connection line of O 2; the remaining dorsalia obvious, nearly rounded (Fig. 27 A). Median eye plate with a porous thickening structure underneath (Fig. 28 A). Ventral view: coxae in four groups, margin with few setae; excretory pore circular, with thickened and sclerotized margin; a pair of ventral plates lateral to the excretory pore (Figs 27 E – F, 28 B). Pregenital sclerite relatively large, somewhat mushroom-shaped, postgenital sclerite distinct, located posterior to the genital field; genital field with three pairs of acetabula; genital flaps divided into three pairs; the first pair small, located anterior to Ac 1, with 3–4 pairs of setae; second pair approximately trapezoidal, located between Ac 1 and Ac 2, with 8–15 pairs of setae; third pair very small, located medially to Ac 3, with 2–3 pairs of setae (Figs 27 C, 28 F). Lateral view: So 1 – So 2 located anterior to Dc 1 – Dc 2; So 3 – So 4 lateral to Dc 3 – Dc 4 (Fig. 28 C). Frontal view: A 2 located lateral to the eye capsules (Fig. 28 D). Posterior view: So 5 lateral to V 4 (Fig. 28 E).</p><p>Gnathosoma with a short rostrum and two pairs of setae (Figs 28 G – H, 29 A). Palp five-segmented; P- 1 short, with one dorsal pinnate seta; P- 2 with five dorsal and two lateral pinnate setae; P- 3 dorsally with two pinnate setae; P- 4 terminally with three fine setae and a short ventral extension with a seta; P- 5 with some stout setae anteriorly (Figs 28 I, 29 D – E). Chelicera shape conventional, chelicera claw concave on lateral side, with a row of teeth on medial side (Figs 28 J, 29 F – I).</p><p>Legs robust; except for the sixth segments, all segments with a large number of short fine seta and stout setae; I-L- 4–5 ventrally with long pinnate setae; I – II-L- 6 with a large seta, and with a few short setae dorsally; III – IV-L - 6 with with a few long setae anteriorly (Figs 30 A – B, 30 D – E, 30 H – I, 30 K – L, 31 C – F, 31 H – K). Claws simple, lateral and medial side both with a groove; I – II-L claws lateral with a row of small teeth, but none in III – IV-L claws (Figs 30 G, 31 B, 31 G, 31 L).</p><p>Male (n = 3). General characteristics similar to the female (Figs 27 B, 27 G – J, 32 A – H). Genital field shorter than in female; pregenital sclerite small and concealed between Ac 1 (Figs 27 D, 32 D). I – II-L- 6 with more setae than in female (Figs 30 C, 30 F, 30 J, 31 A).</p><p>Measurements.</p><p>Male (n = 3) and female (n = 4). See Table 4 for details.</p><p>Remarks.</p><p>Deuterothyas fujianensis Zhan Guo, sp. nov. is very similar to Deuterothyas variabilis, but can be distinguished by the following features: (1) D 2 of Deuterothyas variabilis is located lateral to Dc 2, but D 2 of D. fujianensis is located posterior to Dc 2; (2) Cx-III and Cx-IV of the new species are more angular, while those of D. variabilis are more rounded; (3) compared to D. variabilis, the second pair of genital flaps of the new species is smaller and has fewer setae (Lundblad 1969; Cook 1974).</p></div>	https://treatment.plazi.org/id/D8BE7D099BB25CAF9D2121DF7EF109B2	Public Domain	No known copyright restrictions apply. See Agosti, D., Egloff, W., 2009. Taxonomic information exchange and copyright: the Plazi approach. BMC Research Notes 2009, 2:53 for further explanation.		Pensoft via Plazi	Zhan, Bao-Xiang;Smit, Harry;Li, Hai-Tao;Gu, Xin-Yao;Guo, Jian-Jun	Zhan, Bao-Xiang, Smit, Harry, Li, Hai-Tao, Gu, Xin-Yao, Guo, Jian-Jun (2026): Four new species of Euthyadinae Viets, 1931 (Acari, Hydrachnidia, Hydryphantidae) living in water-margin habitats in southern China. Zoosystematics and Evolution 102 (4): 911-941, DOI: 10.3897/zse.102.197692
0EAD272DB2915F629CBFBEA2C800A456.text	0EAD272DB2915F629CBFBEA2C800A456.taxon	http://purl.org/dc/dcmitype/Text	http://rs.tdwg.org/ontology/voc/SPMInfoItems#GeneralDescription	text/html	en	Deuterothyas fulu Zhan & Guo 2026	<div><p>Deuterothyas fulu Zhan &amp; Guo sp. nov.</p><p>Figs 9 A – D, 19–26</p><p>Type material.</p><p>• Holotype: female, <a href="https://tb.plazi.org/GgServer/search?materialsCitation.longitude=118.70416&amp;materialsCitation.latitude=26.27861" title="Search Plazi for locations around (long 118.70416/lat 26.27861)">Tangxia Village</a>, Xiongjiang Town, Minqing County, Fuzhou City, Fujian Province, P. R. China (26°16'43"N, 118°42'15"E; 302 m a. s. l.), leg. Bao-Xiang Zhan, Lan Ja &amp; Dong-Mei Liu, 06-VII-2024, Slide No. FJ - HYDRY - 2024070611 . • Paratypes: 6 ♂, 4 ♀, same locality and data as holotype, Slide No. FJ - HYDRY - 2024070612 –2024070621 .</p><p>Habitat.</p><p>Subtropical evergreen broad-leaved forest, with green algae on the banks of rapid streams. (Fig. 9 A – D).</p><p>Etymology.</p><p>The new species is named for the secondary sclerotization under its dorsal integument, which resembles the “ fulu ” in Chinese Taoism. The name is a noun in apposition.</p><p>Diagnosis.</p><p>Integument papillae rounded, with folds between papillae. Prefrontalia, postfrontalia and Dc 1 fuse to median eye plate; dorsal and lateral plates small, nearly rounded. Genital flap divided into three pairs, the first and third pairs small, the second pair narrow, located between Ac 1 and Ac 2; postgenital sclerite small. The lateral ventral surface of IV-L - 5 extends terminally, with two thick spines at the end. With interconnected secondary sclerotized structures under the median eye plate, Dl 1 and Dc 2. Female. The secondary slcerotized structure under other plates small; pregenital sclerite wedge-shaped. Male. The secondary sclerotization under the Dl 2 and Dl 3 separated or connected; the secondary sclerotization under the Dl 4, Dc 4 and Dc 5 is connected in various ways; pregenital sclerite small.</p><p>Description.</p><p>Living habitus: Idiosoma red; lateral eyes red; palps and legs orange (Fig. 19 A – D). Integument papillae rounded, with folds between papillae (Fig. 20 F, G). Female (n = 5). Dorsal view: median eye plate formed by the fusion of the prefrontalia, postfrontalia and Dc 1; median eye and O 2 located on the median eye plate, with the median eye positioned anterior to the connection line of O 2; the remaining dorsalia small, nearly rounded (Fig. 20 A, E). With a interconnected secondary sclerotized structures under the median eye plate, Dl 1 and Dc 2; the secondary sclerotized structure under other plates small (Fig. 21 A). Ventral view: coxae in four groups, margins with few setae, and the tip of Cx-III with several pairs of short, stout setae; excretory pore circular, with thickened and sclerotized margin (Fig. 21 B). Pregenital sclerite wedge-shaped, postgenital sclerite small; genital field with three pairs of acetabula; genital flaps divided into three pairs; the first pair small, located anterior to Ac 1, with 2–4 pairs of setae; second pair narrow, located between Ac 1 and Ac 2, with 7–10 pairs of setae; third pair very small, located medially to Ac 3, with 1–3 pairs of setae (Figs 20 C, 21 F). Lateral view: So 1 anterior to Dc 1; So 5 near Dc 5 (Fig. 21 C). Frontal view: A 2 located lateral to the eye capsules (Fig. 21 D). Posterior view: So 5 lateral to V 4 (Fig. 21 E).</p><p>Gnathosoma with a short rostrum and two pairs of setae (Figs 21 G – H, 22 A). Palp five-segmented; P- 1 short, with one dorsal seta; P- 2 with four dorsal and one lateral pinnate setae; P- 3 with two dorsal pinnate setae; P- 4 terminal with three fine setae and short ventral extension with one seta; P- 5 short, with some stout setae anteriorly (Figs 21 I, 22 B – E). chelicera shape conventional, chelicera claw concave on lateral side, with a row of teeth on medial side (Figs 21 J, 22 F – I).</p><p>Legs robust; except for the sixth segments, all segments with a large number of short and stout setae; I – II-L- 6 dorsally with short setae, laterally and medially with short fine setae anteriorly; III – IV-L - 6 with with a few long setae anteriorly; The lateral ventral surface of IV-L - 5 extends terminally, with two thick spines at the end (Figs 23 A – B, 23 D – E, 23 H – I, 23 K – L, 24 C – F, 24 H – K). Claws simple, lateral and medial side both with a groove; I – III-L claws laterally with a row of small teeth, but not in IV-L claws (Figs 23 G, 24 B, 24 G, 24 L).</p><p>Male (n = 6). General characteristics similar to the female (Figs 20 B, 25 A – H). However, the secondary sclerotization under the integument is different from the female: the secondary sclerotization under Dl 2 and Dl 3 is connected; and the secondary sclerotization under Dl 4, Dc 4 and Dc 5 separated or connected in various ways (Figs 25 A, 26 A – D). Genital field shorter than female; pregenital sclerite small (Figs 20 D, 25 D). I – II-L- 6 with more setae than in female (Figs 23 C, 23 F, 23 J, 24 A).</p><p>Measurements.</p><p>Male (n = 4) and female (n = 4). See Table 3 for details.</p><p>Remarks.</p><p>Deuterothyas fulu Zhan &amp; Guo, sp. nov. is assigned to the genus Deuterothyas Lundblad, 1941 because of its genital flaps divided into three parts (Cook 1974; Smit 2020). The new species can be distinguished from other species of the genus in the following aspects: (1) the new species has dorsal and lateral plates that are significantly smaller than those of other species in the genus; (2) in the new species, the lateral ventral surface of IV-L - 5 extends terminally, with two thick spines at the end, but other species of this genus lack this feature; (3) the second pair of genital flaps is narrower than those of other species in this genus.</p></div>	https://treatment.plazi.org/id/0EAD272DB2915F629CBFBEA2C800A456	Public Domain	No known copyright restrictions apply. See Agosti, D., Egloff, W., 2009. Taxonomic information exchange and copyright: the Plazi approach. BMC Research Notes 2009, 2:53 for further explanation.		Pensoft via Plazi	Zhan, Bao-Xiang;Smit, Harry;Li, Hai-Tao;Gu, Xin-Yao;Guo, Jian-Jun	Zhan, Bao-Xiang, Smit, Harry, Li, Hai-Tao, Gu, Xin-Yao, Guo, Jian-Jun (2026): Four new species of Euthyadinae Viets, 1931 (Acari, Hydrachnidia, Hydryphantidae) living in water-margin habitats in southern China. Zoosystematics and Evolution 102 (4): 911-941, DOI: 10.3897/zse.102.197692
49855E8410CC59CEB30D67C9A8A7F72B.text	49855E8410CC59CEB30D67C9A8A7F72B.taxon	http://purl.org/dc/dcmitype/Text	http://rs.tdwg.org/ontology/voc/SPMInfoItems#GeneralDescription	text/html	en	Panisopsis lixunae Zhan & Guo 2026	<div><p>Panisopsis (s. str.) lixunae Zhan &amp; Guo sp. nov.</p><p>Figs 1, 2, 3, 4, 5, 6, 7, 8</p><p>Type material.</p><p>• Holotype: adult female, Wudaoshui Town, Sangzhi County, Zhangjiajie City, Hunan Province, P. R. China, leg. Zhu-Hui Ding &amp; Xin-Yao Gu, 15-VII-2015, Slide No. HN - HYDRY - 2016081501 . • Paratypes: one adult male, same data as holotype, Slide No. HN - HYDRY - 2016081502; five adult females and one adult male, <a href="https://tb.plazi.org/GgServer/search?materialsCitation.longitude=106.786385&amp;materialsCitation.latitude=26.318611" title="Search Plazi for locations around (long 106.786385/lat 26.318611)">Hongyan Gorge</a>, Huaxi District, Guiyang City, Guizhou Province (26°19'07"N, 106°47'11"E; 1131 m a. s. l.), leg. Bao-Xiang Zhan &amp; Xun Li, Slide No. GZ-HYDRY-2024100401 –6 .</p><p>Habitat.</p><p>In shallow mountain streams, on stones partially exposed above the water surface, scoured by the swift currents and covered with moss. When the damp moss is lifted, mites can be seen crawling on the substrate (Fig. 1 A – C).</p><p>Etymology.</p><p>The specific epithet refers to the collector of the paratypes, Xun Li; the name is treated as an adjective.</p><p>Diagnosis.</p><p>Integument papillae closely arranged, blunt and smooth. Well-developed median eye and O 2 located on the median eye plate, with the median eye positioned anterior to the connection line of O 2. Dorsal plates large, with the edges and corners of each plate distinctly rounded. Postgenital sclerite very small and concealed between the Ac 3. Gnathosomal base slightly short and approximately an isosceles right triangle in lateral view. III – IV-L - 6 with a large number of lamellate setae at the ventral side of the middle rear to end. Female. Pregenital sclerite as a vertical short rod. Male. Pregenital sclerite very small and concealed between the Ac 1.</p><p>Description.</p><p>Living habitus: idiosoma oval, red with a whitish margin, median and lateral eyes black; palps and legs orange (Fig. 2 A, B). Integument papillae closely arranged, blunt and smooth (Fig. 3 E). Female (n = 6). Dorsal view: apical angles of Cx-I and Cx-II invisible in dorsal view. Median eye plate approximately inverse trapezoidal, top and bottom edges convex, formed by the fusion of the prefrontalia, postfrontalia and Dc 1, with three pairs of muscle attachment plates; well-developed median eye and O 2 located on the median eye plate, with the median eye positioned anterior to the connection line of O 2. The remaining dorsalia large, with the edges and corners of each plate distinctly rounded; Dc 2 may be separated or fused with each other, and this situation also occurs randomly among Dc 3–5, resulting in various combinations of Dc, other plates widely separated; each pair of plates with a pair of muscle attachment. (Figs 3 A, 4 A) Ventral view: coxae in four groups; the anterior-median margin of Cx-I bears several pairs of sparse small setae, several pairs of short setae at its apex and two pairs of long setae at lateral margin; the apex of Cx-II with several pairs of short, thick setae, while the lateral margins possess several pairs of long setae; the anterior margin of Cx-III bears several pairs of short setae, with thicker setae at its tip, and lateral margins with several pairs of long setae; the posterolateral region of Cx-IV with several pairs of short setae (Figs 3 B, 4 B). Pregenital sclerite as a vertical short rod; genital field with three pairs of acetabula; the genital flap tapers at both anterior and posterior ends, being wider in the middle, with 5–6 pairs of long setae above Ac 1, approximately 12–18 pairs of long setae along the middle margin, and 3–4 pairs of long setae at the posterior end, located between Ac 2 and Ac 3; postgenital sclerite very small and concealed between Ac 3 (Figs 3 D, 4 F). Excretory pore circular, with thickened and sclerotized margin. Two pairs of ventral plates with muscle attachments. (Fig. 4 B) Lateral view: idiosoma relatively flattened, with a plate located between the Cx-III and L 2 (Fig. 4 C). Frontal view: O 1 plate extremely small and separated from A 1 (Fig. 4 D). Posterior view: So 5 beside V 4 (Fig. 4 E).</p><p>Gnathosomal base short and approximately an isosceles right triangle in lateral view (Figs 4 G, 4 H, 5 A). Palp five-segmented; P- 1 short, with one pinnate seta; P- 2 with four dorsal and three lateral pinnate setae; P- 3 with two dorsal pinnate setae; P- 4 terminally with three fine setae and a seta-like protrusion; P- 5 with some thick setae anteriorly (Figs 4 I, 5 B – E). Chelicera shape conventional, chelicera claw concave on lateral side, with a row of teeth on medial side (Figs 4 J, 5 F – I).</p><p>Legs robust; except for the sixth segments, all segments with a large number of short and thick setae; I – II-L- 6 with evenly arranged both thick and thin short setae anteriorly, and near the dorsal margin in the centre with 2–3 rows of short, fine setae arranged vertically to the leg segments; III – IV-L - 6 with a large number of lamellate setae at the ventral side from the centre to the anterior end (Figs 6 A – B, 6 D – E, 6 H – I, 7 B – C, 7 F – I, 7 K – N). Claws simple, the smooth surface without teeth (Figs 6 G, 7 E, 7 J, 7 O).</p><p>Male (n = 2). General characteristics similar to the female (Figs 3 C, 3 F, 8 A – C, 8 E – H). Pregenital sclerite very small and concealed between the Ac 1 (Fig. 8 D). Ejaculatory complex anterior view: proximal arms well sclerotized, strong, heavy, almost parallel; distal arms well sclerotized, short, bent at base (Fig. 8 I). I – II-L- 6 with more setae than female (Figs 6 C, 6 F, 7 A, 7 D).</p><p>Measurements.</p><p>Male (n = 2) and female (n = 6). See Table 1 for details.</p><p>Remarks.</p><p>Panisopsis (s. str.) lixunae Zhan &amp; Guo, sp. nov. can be distinguished from most species in the genus by its approximately inverted trapezoidal median eye plate and large dorsal plates (Cook 1959; Di Sabatino et al. 2010). The new species is similar to P. (s. str.) garzeensis Zhong &amp; Guo, 2024 . However, the two species can be differentiated by the following characteristics: (1) in the new species, the median eye is positioned anterior to the connection line of O 2, whereas in P. garzeensis, the median eye is located on the connection line of O 2; (2) the ventral platelets of P. (s. str.) garzeensis are relatively small, while those of the new species are comparatively larger; (3) compared to P. garzeensis, the gnathosomal base of the new species is shorter; (4) in the new species, III – IV-L - 6 with a large number of lamellate setae on the ventral side from the center to the anterior end, but this feature is absent in P. (s. str.) garzeensis (Zhong et al. 2024) .</p></div>	https://treatment.plazi.org/id/49855E8410CC59CEB30D67C9A8A7F72B	Public Domain	No known copyright restrictions apply. See Agosti, D., Egloff, W., 2009. Taxonomic information exchange and copyright: the Plazi approach. BMC Research Notes 2009, 2:53 for further explanation.		Pensoft via Plazi	Zhan, Bao-Xiang;Smit, Harry;Li, Hai-Tao;Gu, Xin-Yao;Guo, Jian-Jun	Zhan, Bao-Xiang, Smit, Harry, Li, Hai-Tao, Gu, Xin-Yao, Guo, Jian-Jun (2026): Four new species of Euthyadinae Viets, 1931 (Acari, Hydrachnidia, Hydryphantidae) living in water-margin habitats in southern China. Zoosystematics and Evolution 102 (4): 911-941, DOI: 10.3897/zse.102.197692
