Wandesia (Wandesia) sokolowi, Semenchenko, Ksenia A., 2016

Semenchenko, Ksenia A., 2016, New water mites species (Acariformes: Hydrachnidia) from interstitial waters of the Russian Far East, Zootaxa 4097 (4), pp. 545-556 : 547-550

publication ID

https://doi.org/ 10.11646/zootaxa.4097.4.6

publication LSID

lsid:zoobank.org:pub:FFB7A1C6-3EB4-4722-935D-001A88FDCCC6

DOI

https://doi.org/10.5281/zenodo.6069170

persistent identifier

https://treatment.plazi.org/id/03F8701B-951A-5177-FF2C-F9A00A23FA1D

treatment provided by

Plazi

scientific name

Wandesia (Wandesia) sokolowi
status

sp. nov.

Wandesia (Wandesia) sokolowi sp. n.

( Figs 2A–D View FIGURE 2 A – D , 3A–H View FIGURE 3 A – H )

Type series. Holotype: male ( X 44820 View Materials /Ar-27), Russia, Primory Territory, Artemovsky Urban District, Steklyanukha River, N 43°21.027’; E 132°27.723’; depth 30 cm below the sediment surface; substrate: cobbles, pebbles, coarse- and medium-grained sand; 12.06.2010, leg. K.A. Semenchenko, D.A. Sidorov. Paratypes: 2 males ( X 44852 View Materials /Ar-30), 3 females ( X 44853 View Materials /Ar-31), same data as holotype; 1 male ( X 44854 View Materials /Ar-32), Russia, Primory Territory, Partizansky District, Partizanskay River basin, Tigrovaya River, N 43°11.401’; E 133°12.660’; depth 30 cm below the sediment surface; substrate: cobbles, pebbles, sand; 12.06.2010, leg. K.A. Semenchenko, D.A. Sidorov. Additional material examined (not included in the type series; not mounted, in Koenike’s fluid): 4 males, same data as holotype.

Diagnosis. Adults. P-5 with very long proximal solenidion. Cx-IV well developed, with medial part reaching medial part of Cx-III. Ac-2 longer than Ac-1 and slightly shorter than Ac-3. Setae Ci located on the level of excretory pore.

Description. Both sexes. Idiosoma elongated ( Figs 2A, B View FIGURE 2 A – D ). Integument reticulated; Cx-I and II fused in medial part ( Fig. 2C View FIGURE 2 A – D ); Cx-III with broad medial edge and short anteromedial apodeme; Cx-IV well developed; Cx-I with three setae; Cx-II without setae; Cx-III with one-two setae and Cx-IV with one anterior seta. Genital field ( Fig. 2D View FIGURE 2 A – D ) with three pairs of stalked elongated genital acetabula. Distance between Ac-1 and Ac-2 twice longer than between Ac-2 and Ac-3, Ac-1 shorter than posterior pairs of acetabula. Males with nearly transparent sclerites projected above Ac-1, bearing 13–14 pairs of setae ( Fig. 2D View FIGURE 2 A – D ); females only with two visible pairs of setae on wrinkles of integument ( Fig. 3A View FIGURE 3 A – H ). Gonopore between first pairs of acetabula. Male’s ejaculatory complex as illustrated on Figs 3B–C View FIGURE 3 A – H . Excretory pore elongated, located posteriorly on ventral side between setae Ci. Gnathosoma anteriorly with papillae ( Fig. 3D View FIGURE 3 A – H ). Pedipalps short ( Fig. 3E View FIGURE 3 A – H ). P-1 without setae; P-2 with one lateral and two dorsodistal short setae; P-3 with two long dorsodistal setae; P-4 with large dorsodistal spine and three thin distal setae (dorsal setae absent on pedipalp of holotype); P-5 with very long proximal solenidion. Chelicera ( Fig. 3F View FIGURE 3 A – H ) with large chela. Anterior pairs of legs wider than posterior ( Figs 3G, H View FIGURE 3 A – H ). Claws simple hook-like.

Male. Measurements (n=2). Idiosoma L 1260–1580, Cx-I+II total L 105–108, W 82–92, Cx-III+IV lateral L 73–84; Ac-1 L 25–27, W 16–19, Ac-2 L 34–37, W 17–18, Ac-3 L 39–55, W 16; ejaculatory complex L 121–125; gnathosoma vL 154–211, chelicera basal segment L 127–138, claw L 75–78, L basal segment/claw ratio 1.7; pedipalpal segments (P–1–5) L: 23–24, 46–51, 40–41, 51–56, 12–13; leg segments L: I–Leg– 1–6 —45 –46, 94–95, 78–84, 84–89, 93–107, 94–106; II–Leg– 1–6—46 –48, 76–89, 71–75, 78–84, 92–100, 93–105; III–Leg– 1–6—36 – 38, 67–68, 48–54, 62–65, 76–81, 89–92; IV–Leg– 1–6—51 –60, 70–78, 72–78, 84–89, 86–92, 89–94.

Female. Measurements (n=2). Idiosoma L 1400–1500, Cx-I+II total L 119–124, W 70–100, Cx-III+IV lateral L 100–113; Ac-1 L 32–35, W 19–22, Ac-2 L 45–46, W 17–25, Ac-3 L 51–57, W 18–23; gnathosoma vL 108–130, chelicera basal segment L 154–157, claw L 84–89, L basal segment/claw ratio 1.7–1.8; pedipalpal segments (P–1– 5) L: 21–29, 54–55, 35–40, 58–59, 15–16; leg segments L: I–Leg– 1–6—51 –52, 97–105, 81–86, 90–92, 103–108, 102–108; II–Leg– 1–6—46 –49, 94–95, 75–81, 83–84, 97–100, 105–108; III–Leg– 1–6—36 –38, 60–68, 49–56, 64– 65, 81–89, 93–96; IV–Leg– 1–6—56 –60, 75–78, 76–84, 86–92, 94–95, 92–100.

Differential diagnosis. Three known species from the subgenus Wandesia , i.e.— W. polyseta Tuzovskij, 1982 , W. morozovensis Tuzovskij, 1987 and W. japonica Imamura, 1956 have solenidion on P-5 which is much longer than its length. Wandesia polyseta was described on the basis of a deutonymph ( Tuzovskij 1982), and characterized by multiple idiosomal setae. Wandesia sokolowi sp. n. is closely related to W. morozovensis , known from Magadan Region. The new species differs from the latter in the following characters (character states of W. morozovensis are given in parentheses, data taken from Tuzovskij 1987b): Cx-IV well developed (weakly developed, with medial part not reaching medial part of Cx-III); Ac-2 longer than Ac-1 and slightly shorter than Ac-3 (Ac-2 shorter than other pairs of acetabula); setae Ci located on the level of excretory pore (posterior to excretory pore). Males of the new species differ from W. japonica in having elongated acetabula (in Fig. 2 View FIGURE 2 A – D from Imamura 1956 all acetabula are rounded), 13–14 pairs of genital setae (6 pairs in W. japonica ) and broader Cx-IV.

Etymology. The species is named after Professor Ivan Ivanovich Sokolow (1885–1972) in appreciation of his studies on water mites of the Russian Far East.

Distribution. Primory Territory, Far East of Russia.

Kingdom

Animalia

Phylum

Arthropoda

Class

Arachnida

Order

Trombidiformes

Family

Protziidae

Genus

Wandesia

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