Neumania (Soarella) parahirsuta, 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 : 264-267

Neumania (Soarella) parahirsuta sp. nov.

Zoobank: 4D3AF9FD-E483-4A8F-89F4-B5B7A9492E0E

( Figures 7–8 )

Diagnosis — Idiosoma with weak sclerotization, densely with fine setae, dorsum with two pairs of small dorsalia. All glandularia with well-developed finger-like tubercles. Excretory pore on a spindle-shaped tubercle. P-3 with two blunt barbed setae, P-4 with a distal peg-like seta. Suture line between Cx-III/IV complete, female genital field with 12–22 pairs of acetabula.

Etymology — The specific name is from Latin word: “ para- » means similar, the name of this new species is derived from its similarity to N. hirsute Wiles, 1999 .

Material examined — Holotype: ♀ ; Diaoluo Mountain National Nature Reserve , Hainan Province, China ; 18°43′17.76″N, 109°52′21.36″ E, 906 m a.s.l. ; 16 Jan. 2018 ; Zhuhui Ding leg.; GUGC.

Description — Female: Idiosoma with weak sclerotization, covered with fine setae, dorsum with two pairs of dorsalia, excretory pore terminally located, with a well-developed spindle-shaped tubercle ( Figure 7A ). Coxal 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 two-thirds of Cx-IV, posterior projection of Cx-IV hook-like. The mid-edge spacing of Cx-IV wide ( Figure 7B ). Genital field located subterminally, each with 12–22 acetabula, the pregenital sclerite connected to the middle edge of Cx-IV’s end through a secondary-sclerotized structure, and the posterior edge of the genital plates contact the postgenital sclerite, and the plate contains 4–7 genital setae ( Figure 7E ).

Palp typically five-segmented. P-1 distally with one dorsal seta; P-2 with one dorsomedial seta and two distolateral barbed setae; P-3 with two blunt barbed setae, the mediolateral one longer than the dorsodistal one; P-4 with two closed ventral setae situated on little tubercles, along with one peg-like seta inserted at its small base, with a distolateral long fine seta; the claws of P-5 distinctly trifurcated ( Figure 7C ). Ventral apodeme of gnathosoma much longer than dorsal apodeme, a projection located at the base of the ventral apodeme of the gnathosoma ( Figure 7D ). Chelicera with a well-developed claw. II-L-4, 5 ventrodistally with one short swimming setae, respectively ( Figure 8B ); III-L-3, -4, -5 distally with one, three, three swimming setae, respectively ( Figure 8C ); IV-L-3, -4, -5 distally with two, three, three swimming setae, respectively; IV-L-6 ventrally with two serrate setae ( Figure 8D ).

Measurements — Female (n = 1): Idiosoma L 543, W 467 (L/W ratio 1.16); genital plates

82, W 44 (L/W ratio 1.86); gonopore L 141. LA 325; LP 171; medial distance between Cx-IV 33. Gnathosoma L 87. Lengths of the palp segments (P-1–5): 18, 75, 30, 56, 31. Lengths of I-L-1–6: 58, 86, 92, 131, 139, 142. Lengths of II-L-1–6: 52, 91, 81, 130, 141, 143, 4. Lengths

of III-L-1–6: 54, 78, 66, 122, 143, 149. Lengths of IV-L-1–6: 69, 81, 95, 156, 180, 174.

Male: Unknown.

Remarks — This species is similar to Neumania hirsuta Wiles, 1999 ( Wiles 1999). While

Wiles did not assign this species to a particular subgenus, the significant presence of finger-like protuberance of glandularia provide evidence for its classification within the subgenus Soarella . And the two species can be distinguished by the following characteristics: (1) dorsum with a pair of dorsalia in N. hirsuta (while have two pairs in the new species). (2) I-leg-5 with a characteristic distal seta in N. hirsuta (while without in the new species). (3) The excretory

pore with small tubercle in N. hirsuta (while large in the new species).

Distribution — China (Hainan Province), pond.

Figures

Figure 7 Neumania (Soarella) parahirsuta sp. nov. (Female A–E): A. Idiosoma, dorsal view; B. Idiosoma, ventral view; C. Palp; D. Gnathosoma; E. Genital Field; Scale bars = 100 μm.

Figure 8 Neumania (Soarella) parahirsuta sp. nov. (Female A–D): A. I-L-1–6; B. II-L-1–6; C. III-L-1–6; D. IV-L-1–6; Scale bars = 100 μm.