Neumania (Soarella) nodophora, DingK & YiK & K & JinK, 2024

DingK, Zhu-Hui, YiK, Tian-Ci, K, Jian-Jun Guo & JinK, Dao-Chao, 2024, New records of the subgenus Soarella Koenike, 1907 from China (Acari, Hydrachnidia, Unionicolidae, Neumania), with the description of five new species, Acarologia 64 (1), pp. 256-276 : 257-261

Neumania (Soarella) nodophora sp. nov.

Zoobank: 1F612678-BA8C-4EF0-A509-9EF346E48E9F

( Figures 1–3 )

Diagnosis — Idiosoma with weak sclerotization, dorsum with two pairs of small dorsalia. Except for O 1, O 2, V 2, V 1~ and V 4~, the remaining glandularia on tubercles. Excretory pore with developed spindle-shaped tubercle. P-3 with two dorsal setae, P-4 with a distal peg like seta, two subterminal fine setae. Suture line between Cx-III/IV complete, genital field with 34–36 pairs of acetabula.

Etymology — The specific name is from Latin word: “ nod- » means node, “- phora » means attachment. The name of this new species is derived from the tubercular glandular it possesses.

Material examined — Holotype: ♂ ; Fenghuang Mountain , Jidong County, Heilongjiang Province, China ; 44°58′17″N, 131°14′03″E, 427 m a.s.l. ; 24 Jul. 2019 ; Min Ao and Haitao Li

leg.; GUGC. Paratypes: 2 ♂♂, 2 ♀♀ ; the same data as the holotype ; GUGC.

Description — Male: Idiosoma with weak sclerotization, covered with fine papillae ( Figure 1C ), dorsum with two pairs of approximate oval dorsalia, V 2 lacks glandular sclerites and flush with the excretory pore, featuring a well-developed spindle-shaped nodule ( Figure.1 Coxal A) plates in four groups, surface lightly reticulated, interspace between Cx-II and Cx-III narrow, suture line between Cx-III/IV complete, posterior apodemes of ACG extending to one-third of Cx-IV, posterior projection of Cx-IV somewhat hook-shaped ( Figure 1B ). Cx-IV with many wavy muscle scars and Cx-III with few ( Figure 1B ). Genital field terminally located, each with 34–36 acetabula, the arrangement of the outermost acetabula suckers within a layer of folds, forming an inner ring. The edge of the genital plates lined with nine pairs of fine setae ( Figure 2D ).

Palp typically five-segmented. P-1 stubby, distally with one dorsal seta; P-2 with two dorsomedial setae and two distolateral blunt barbed setae; P-3 with a mediolateral long

100 μm.

seta and a dorsodistal blunt barbed seta; P-4 with two closed ventral setae situated on little tubercles and one peg-like setae inserting on its base, with a distolateral long fine seta and a proximodorsal long fine seta; P-5 claws distinctly trigeminal ( Figure 2A ). Ventral apodeme

of gnathosoma slightly longer than dorsal apodeme, a toe-like projection located at the base of the ventral apodeme of the gnathosoma ( Figure 2C ). Chelicera with a well-developed claw. II-L-5 ventrodistally with two short swimming setae; IV-L-3, -4, -5 distally with one, five, three swimming setae, respectively; IV-L-6 ventrally with four serrate setae ( Figures 3A–D ).

Measurements — Male (n = 2): Idiosoma L 488–529, W 454–498 (L/W ratio 0.98–1.17);

genital field L 109–127, W 185–204 (L/W ratio 0.53–0.69). LA 318–321; LP 202–207;

medial distance between Cx-IV 10–19. Chelicera L 139–144. Ejaculatory complex L 86–139. Lengths of the palp segments (P-1–5): 25–28, 94–101, 33–38, 65–66, 26–28. Lengths of I-L-1–6: 57–60, 85–108, 108–111, 153–160, 175–185, 214–221. Lengths of II-L-1–6: 59–61, 91–111, 99–107, 128–181, 188–201, 205–227. Lengths of III-L-1–6: 58–67, 86–105, 98–100,

149–161, 184–200, 70–94. Lengths of IV-L-1–6: 70–94, 72–106, 110–112, 153–169, 208–221, 182–199.

Female: Similar to the male. The proportion of the dorsalia small obviously ( Figure 1D ). Interspace between Cx-II and Cx-III wide, the mid-edge spacing of Cx-IV wide, posterior apodemes of ACG extending to the middle of Cx-III ( Figure 1E ), and genital palates separated, each with 31–36 acetabula, the posterior edge of the genital plates makes contact with the postgenital sclerite, and the plate possesses nine genital setae ( Figure 2E ).

Measurements — Female (n = 2): Idiosoma L 726–822, W 651–725 (L/W ratio 1.00–1.26); genital field L 127–136, W 67–76 (L/W ratio 1.67–2.02); gonopore L 169–171. LA 382–384;

LP 230–233; medial distance between Cx-IV 78–80. Gnathosoma L 108–110. Chelicera

L 157–159. Lengths of the palp segments (P-1–5): 31–33, 109–121, 40–51, 73–80, 31–36. Lengths of I-L-1–6: 72–77, 109–121, 123–133, 177–179, 199–205, 211–214. Lengths of II- L-1–6: 73–79, 114–123, 112–116, 181–196, 220–250, 229–231. Lengths of III-L-1–6: 76–80, 110–132, 109–121, 170–181, 223–230, 202–209. Lengths of IV-L-1–6: 109–116, 123–135,

137–145, 217–228, 274–279, 232–240.

Remarks — This species exhibits similarities with Neumania (Soarella) tuberculata Cook ,

1966 from Liberia. However, there are notable differences between this species and the new species, which include: (1) Suture line between Cx-III/IV incomplete (complete in the new species). (2) Dorsum with three pairs of dorsalia (two pairs of dorsalia in the new species). (3) Glandularia are obviously enlarged (while slightly enlarged in the new species).

This species also exhibits similarities to Neumania (Soarella) angulata Sokolow, 1931 ( Imamura 1953), and differs from the new species in the following aspects: posterior apodemes

of ACG is straight (while bend inward in the new species); acetabula fewer than 30 pairs (while have more than 30 pairs in the new species); IV-L-6 of female have two serrate setae (with four

in the new species).

Distribution — China (Heilongjiang Province), pond.

Figures

Figure 1 Neumania (Soarella) nodophorasp. nov. (Male A–C, Female D, E): A, D. Idiosoma, dorsal view; C. Mesh pattern of Idiosoma; B, E. Idiosoma, ventral view; Scale bars = 100 μm.

Figure 2 Neumania (Soarella) nodophorasp. nov. (Male B–D; Female A, E): A, B. Palp; C. Gnathosoma; D, E. Genital Field; Scale bars =

Figure 3 Neumania (Soarella) nodophorasp. nov. (Male A–D; Female E): A. I-L-1–6; B. II-L-1–6; C. III-L-1–6; D. IV-L-1–6; E. II-L-5; Scale bars = 100 *μm.