Neumania (Soarella) paranodophora, 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 : 261-264

Neumania (Soarella) paranodophora sp. nov.

Zoobank: 8169E83E-64E3-4D73-BC25-034323C903F4

( Figures 4–6 )

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 exhibit tubercular characteristics. Excretory pore with developed spindle-shaped nodule. P-3 with two blunt barbed setae, P-4 with a distal peg-like seta, two subterminal fine setae. Suture line between Cx-III/IV slightly incomplete, male genital field with 47–50 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. nodophora sp. nov.

Material examined — Holotype: ♂ ; Songhua River , Harbin city, Heilongjiang Province, China ; 45°41′19″N, 126°21′18″E, 127 m a.s.l. ; 26 Jul. 2019 ; Min Ao and Haitao Li leg.; GUGC . Paratypes: 1 ♀ ; the same data as the holotype ; GUGC.

Description — Male: Idiosoma with weak sclerotization, covered with fine papillae ( Figure 4E ), dorsum with two pairs of approximate oval dorsalia, V ~2 ~ without glandular sclerites, excretory pore located in the terminal position of the dorsum, with well-developed spindle-shaped nodule ( Figure 4A ). Coxal plates in four groups, surface lightly reticulated, interspace between Cx-II and Cx-III narrow, suture line between Cx-III/IV slightly incomplete, posterior apodemes of ACG extending to one-third of Cx-IV, posterior projection of Cx-IV bending medially and tending to be straight. Cx-IV with many wavy muscle scars and Cx-III with few ( Figure 4B ). Genital field located subterminally ( Figure 4B ), each with 47–50 acetabula, with prominent sclerotized margins surrounding it, with a layer of folds interspersed near the outer edge, forming an inner circle. The edge of the genital plates lined with 10 pairs of fine genital setae ( Figure 5E ).

Palp five-segmented. P-1 stocky, distally with one dorsal seta; P-2 with two dorsomedial setae and two distolateral blunt serrated 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 small tubercles, along with one peg-like seta inserted at its base, with a distolateral long fine seta; the claws of P-5 distinctly trifurcated ( Figure 5A ). Ventral apodeme of gnathosoma slightly shorter than dorsal apodeme, a toe-like projection located at the base of the ventral apodeme of the gnathosoma ( Figure 5C ). Chelicera with a well-developed claw ( Figure 5D ). II-L-5 ventrodistally with two short swimming setae ( Figure 6B ); IV-L-3, -4, -5 distally with one, five, three swimming setae, respectively; IV-L-6 ventrally with three serrate setae ( Figure 6D ).

Measurements — Male (n = 1): Idiosoma L 680, W 587 (L/W ratio 1.16); genital plates

167, W 253 (L/W ratio 0.66). LA 360; LP 236; medial distance between Cx-IV 26. Gnathosoma

L 89. Chelicera L 117. Ejaculatory complex L: 138. Lengths of the palp segments (P-1–5): 28,

103, 33, 69, 30. Lengths of I-L-1–6: 59, 103, 102, 166, 179, 215. Lengths of II-L-1–6: 72, 124,

102, 174, 203, 224. Lengths of III-L-1–6: 69, 111, 97, 185, 221, 226. Lengths of IV-L-1–6: 100, 119, 126, 213, 252, 227.

Female: Similar to the male. Interspace between Cx-II and Cx-III wide, the mid-edge spacing of Cx-IV wide, the proportion of the dorsalia small obviously ( Figure 4D ). Genital plates separated, each with 35–40 acetabula, the posterior edge of the genital palates makes contact with the postgenital sclerite, and the plate possesses nine genital setae ( Figure 5F ), IV-L-6 ventrally with three serrate setae ( Figure 6E ).

Measurements — Female (n = 1): Idiosoma L 754, W 675 (L/W ratio 1.12); genital plates 132, W 73 (L/W ratio 1.81); gonopore L 177. LA 371; LP 243; medial distance between Cx-IV 71. Gnathosoma L 93. Chelicera L 131. Lengths of the palp segments (P-1–5): 27, 110, 38, 70, 34. Lengths of I-L-1–6: 76, 110, 118, 170, 187, 203. Lengths of II-L-1–6: 76, 214, 114, 174, 211, 224. Lengths of III-L-1–6: 77, 114, 110, 178, 222, 204. Lengths of IV-L-1–6: 87, 127, 139, 214, 263, 226.

Remarks — This species is similar to Neumania (Soarella) nodophora sp. nov. However, the two species can be distinguished by the following characteristics: (1) Suture line between Cx-III/IV complete in N. nodophora sp. nov. (incomplete in the new species). (2) Male acetabula have 24–36 pairs in N. nodophora sp. nov., the number is significantly less compared to the new species (while have 47–50 pairs in the new species).

Distribution — China (Heilongjiang Province), pond.

Figures

Figure 4 Neumania (Soarella) paranodophorasp. nov. (Male A, B, E, Female C, D): A, C. Idiosoma, dorsal view; B, D. Idiosoma, ventral view; E. Mesh pattern of Idiosoma; Scale bars = 100 μm.

Figure 5 Neumania (Soarella) paranodophorasp. nov. (Female A, F; Male B–E): A, B. Palp; C. Gnathosoma; D. Chelicera; E, F. Genital Field; Scale bars = 100 μm.

Figure 6 Neumania (Soarella) paranodophorasp. 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. IV-L-6; Scale bars = 100 μm.