Trichothyas (Neothyas) zhangae Li, Jin & Guo, 2024
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publication ID |
https://doi.org/ 10.24349/eahs-q4xf |
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publication LSID |
lsid:zoobank.org:pub:9BC9A6D6-6BB3-41F8-9306-AD3CE76A9F0A |
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persistent identifier |
https://treatment.plazi.org/id/FD4687CA-3C6B-406A-1BFF-289E0368FD02 |
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treatment provided by |
Felipe |
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scientific name |
Trichothyas (Neothyas) zhangae Li, Jin & Guo |
| status |
sp. nov. |
Trichothyas (Neothyas) zhangae Li, Jin & Guo sp. nov. ( Figures 9–15 View Figure 9 View Figure 10 View Figure 11 View Figure 12 View Figure 13 View Figure 14 View Figure 15 )
Zoobank: A118D8F4-34DA-4D5E-8B6B-DEF1E6BA0D02
Habitat — Turbulent current with organic detritus, gravels and cobblestones in the mountain.
Material examined — Holotype: adult male, Mount Huangshan World Geopark , Anhui Province, P. R. China (30°04′41″N, 118°09′01″E, 530 m a.s.l.), collected by Xu Zhang, 20-V-2010. Slides No. AH-HY-2010052006 GoogleMaps . Allotype: adult female, same data as holotype, slides No. AH-HY-2010052007. Paratype: four adult males and two adult females, same data as holotype, Slides No. AH-HY-2010052008–2010052013.
Etymology — This new species is named after Dr Xu Zhang (P. R. China) in appreciation
of providing the specimens and her brilliant contribution on water mites taxonomy.
Diagnosis — All dorsal plates separated; D 2 slightly behind posterior edge of FS; middle margin of ACG with two rows of feathered setae; C 2 rounded under SEM, but with sclerotization beneath integument under optical microscope; PCG widely separated; genital field with three pairs of acetabula, GF extended from the middle of Ac-1 to Ac-3, Gp relatively long, extending to frontal margin of third acetabula; a round CP bigger than V 3 ; EP with sclerotized extension; a pair of V 1 separated; P-4 terminal with a seta-liked protrusion; I-L-3 without two strong dorsal peg setae. Male. PS trapezoidal. Female. PS triangular.
of chelicera.
Description — Male (n=5). Integument papillae bluntly pointed, interspaces with fine lineation ( Figure 9A View Figure 9 ). In dorsal view: apical angles of Cx-I and Cx-II visible in dorsal view; all dorsal plates separated; FS inverse isosceles trapezoid, with median eye, O 2 and five muscle attachments; D 2 slightly behind posterior edge of FS; ACP with a muscle attachment in the middle; PCP with a pair of muscle attachment; all LP with a muscle attachment, LP 1 and 4 triangle, LP 2 and 3 trapezoidal ( Figure 10A View Figure 10 ). In ventral view: middle margin of ACG with two rows of feathered setae most dense near the base of ACG ( Figure 11A–B View Figure 11 ); C 2 rounded under SEM, but with sclerotization beneath integument under optical microscope ( Figures 9B View Figure 9 , 10B View Figure 10 ); PCG widely separated ( Figure 10B View Figure 10 ); genital field with three pairs of acetabula, PS trapezoidal, GF extended from the middle of Ac-1 to Ac-3, Gp relatively long, extending to frontal margin of third acetabula ( Figure 10B View Figure 10 ); a round CP bigger than V 3 ; EP with sclerotized extension; a
pair of V 1 separated ( Figure 10B View Figure 10 ). In lateral view: except L 1 and L 4, four sclerotized plates with varying shapes near the body axis close to each other ( Figure 10C View Figure 10 ). In frontal view: A 1 fused with a triangular plate, lateral eyes attached to O 1 platelets ( Figure 10D View Figure 10 ). In rear view: V 4 close
to LP 4 but not fused ( Figure 10E View Figure 10 ).
Gnathosomal base long and slender ( Figure 9C View Figure 9 ). Chelicera base relatively long; chela with teeth on one side ( Figure 9D View Figure 9 ). Palp five-segmented ( Figure 12A, C View Figure 12 ); P-1 short, with two feathered setae; P-2 with three dorsal and two lateral feathered setae; P-3 with two dorsal feathered setae; P-4 terminal with three setae and a seta-liked protrusion ( Figure 12B, D View Figure 12 ); venter of P-5 with a mini seta on one side ( Figure 12B, D View Figure 12 ).
Legs robust: I-L-3 without two strong dorsal peg setae.
Female (n=3). Similar to the male except larger idiosoma and PS wider ( Figures 11C–D View Figure 11 , 13–15 View Figure 13 View Figure 14 View Figure 15 ).
Measurements — Male (n=5). I L/W 964 (874–964)/714 (670–714); FS L/W 300 (251–
300)/378 (363–378); ACP L/W 160 (144–164)/186 (165–186); PCP L/W 196 (178–198)/283
(241–283); LP 1–4 L/W 246 (232–246)/132 (129–138), 229 (179–229)/213 (190–213), 198 (198–215)/180 (145–180), 210 (202–210)/258 (221–258). ACG L/W 272 (247–272)/205 (182–205); PCG L/W 273 (239–273)/221 (211–221); PS L/W 60 (53–62)/62 (47–62); Gp L 201 (193–210); GF L 209 (183–209); Ac-1–3 L/W 76 (63–76)/30 (24–30), 74 (71–74)/24 (24–30), 63 (57–66)/53 (43–53); EP L 15 (15–16); CP L/W 79 (57–79)/70 (48–70). G L 265 (246–265); CB L 185 (170–185), CC L 73 (68–73); Palp segments L: P-1–5 32 (27–32), 89 (83–89), 48 (41–48), 106 (106–111), 38 (38–39). Leg segments L: Ⅰ-L-1 68 (67–71), Ⅰ-L-2
144 (136–144), Ⅰ-L-3 68 (68–70), Ⅰ-L-4 90 (90–92), Ⅰ-L-5 105 (102–105), Ⅰ-L-6 103 (99–103);
II-L-1 76 (76–80), II-L-2 159 (146–159), II-L-3 74 (69–74), II-L-4 106 (106–111), II-L-5
122 (117–122), II-L-6 137 (137–148); III-L-1 80 (80–95), III-L-2 146 (138–146), III-L-3
68 (64–68), III-L-4 92 (92–102), III-L-5 107 (107–112), III-L-6 127 (127–131); IV-L-1 150 (142–150), IV-L-2 181 (172–181), IV-L-3 112 (109–112), IV-L-4 184 (184–188), IV-L-5 140 (140–143), IV-L-6 134 (132–139).
Female (n=3). I L/W 1018 (1018–1082)/771 (771–885); FS L/W 302 (302–360)/377 (377–409); ACP L/W 170 (170–183)/192 (192–209); PCP L/W 202 (202–230)/301 (301–318);
LP 1–4 L/W 239 (239–259)/172 (172–187), 230 (230–238)/236 (236–264), 216 (216–237)/204 (204–207), 216 (198–216)/275 (275–285). ACG L/W 271 (271–287)/201 (201–206); PCG L/W 271 (271–282)/235 (235–258); PS L/W 44 (42–44)/89 (89–97); Gp L 224 (224–236); GF
L 218 (218–232); Ac-1–3 L/W 71 (71–79)/36 (30–36), 83 (79–83)/29 (29–32), 76 (75–76)/48
(48–49); EP L 19 (18–19); CP L/W 49 (49–52)/48 (44–48). G L 260 (260–284); CB L 197
(192–197), CC L 75 (75–88); Palp segments L: P-1–5 33 (33–40), 91 (91–97), 47 (47–58),
114 (114–120), 38 (38–39). Leg segments L: Ⅰ-L-1 73 (73–88), Ⅰ-L-2 134 (134–144), Ⅰ-L-3
66 (66–72), Ⅰ-L-4 90 (90–106), Ⅰ-L-5 104 (102–104), Ⅰ-L-6 102 (102–107); II-L-1 73 (73–89), II-L-2 155 (155–178), II-L-3 67 (67–77), II-L-4 110 (110–129), II-L-5 120 (120–140), II-L-6 143 (143–154); III-L-1 78 (78–82), III-L-2 142 (142–155), III-L-3 69 (69–71), III-L-4 104 (104–114), III-L-5 114 (114–126), III-L-6 134 (134–149); IV-L-1 146 (146–169), IV-L-2 184
(184–195), IV-L-3 107 (107–132), IV-L-4 193 (193–224), IV-L-5 142 (142–161), IV-L-6 140
(140–155).
Remarks — Previously, only one species of the subgenus Neothyas was known, i.e. Trichothyas (Neothyas) hygropetrica Lundblad, 1941 from Indonesia (Table 1). Unfortunately,
the female T. (N.) hygropetrica was not described by Lundblad (1941). Therefore, only males
of the two species are compared here. Trichothyas zhangae sp. nov. from Anhui differs from T. hygropetrica in the following characters: (1) PS of T. (N.) zhangae Li, Jin & Guo sp. nov.
is bigger than T. (N.) hygropetrica ; (2) GF extends from the middle of Ac-1 to Ac- 3 in T. (N.) zhangae Li, Jin & Guo sp. nov., while the anterior margin of GF is behind Ac- 1 in T. (N.) hygropetrica ; (3) Round CP of T. (N.) zhangae Li, Jin & Guo sp. nov. is relatively bigger than irregularly shaped CP of T. (N.) hygropetrica ; (4) EP is with sclerotized extension in T. (N.) zhangae Li, Jin & Guo sp. nov., but not existed in T. (N.) hygropetrica ( Lundblad 1941 ; Cook
1974; Smit 2020).
Distribution — China ; only known from the locus typicus.
| R |
Departamento de Geologia, Universidad de Chile |
| V |
Royal British Columbia Museum - Herbarium |
| LP |
Laboratory of Palaeontology |
| CB |
The CB Rhizobium Collection |
| CC |
CSIRO Canberra Rhizobium Collection |
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.