CC BY
6ADO«
Амурский зоологический журнал, 2023, т. XV, № 4
Amurian Zoological Journal, 2023, vol. XV, no. 4
www.azjournal.ru
К Check for updates
https://www.doi.org/10.33910/2686-9519-2023-15-4-744-748 http://zoobank.org/References/747D3C49-3827-403F-AE33-DFB785DAC650
UDC 595.426
Description of a new water mite species of the genus Atractides Koch, 1837 (Acari, Hydrachnidia, Hygrobatidae) from Kazakhstan
P. V. Tuzovskij
Papanin Institute for Biology of Inland Waters of the Russian Academy of Sciences, 152742, Borok, Russia
Author
Petr V. Tuzovskij
E-mail: [email protected]
SPIN: 4101-5460
Scopus Author ID: 57190753429
ResearcherlD: C-3184-2017
ORCID: 0000-0001-5002-2679
Abstract. An illustrated description of a new species Atractides turkestanicus sp. nov. from the Turkestan Region of Kazakhstan is given. Diagnostic features of the new species include the following characters: integument smooth; genital plate with 23-24 fine setae on each side, anterior margin straight; excretory pore smooth; P-2 with moderately large ventrodistal protrusion; P-3 longer than P-2, with four thick dorsal setae; P-4 sword seta between ventral setae; I-Leg-5 S-1- S-2 separation 12 |m.
Copyright: © The Author (2023). Published by Herzen State Pedagogical
University of Russia. Open access under Keywords: Hydrachnidia, Hygrobatidae, Atractides, water mites, morphology, CC BY-NC License 4.0. male
Описание нового вида водяного клеща рода Atractides Koch, 1837 (Acari, Hydrachnidia, Hygrobatidae) из Казахстана
П.В. Тузовский
Институт биологии внутренних вод им. И.Д. Папанина РАН, 152742, пос. Борок, Россия
Сведения об авторе
Тузовский Петр Васильевич E-mail: [email protected] SPIN-код: 4101-5460 Scopus Author ID: 57190753429 ResearcherlD: C-3184-2017 ORCID: 0000-0001-5002-2679
Аннотация. Иллюстрированное описание самца нового вида клеща atractides turkestanicus вр. поу. из Туркестанской области Казахстана. Покров гладкий; длина генитальной пластины меньше его ширины с 23-24 тонкими щетинками на каждой стороне, передний край прямой; экскреторная пора не склеротизована; колено педипальпы длиннее бедра, с четырьмя толстыми дорсальными щетинками; мечевидная щетинка на голени педипальпы между вентральными щетинками; расстояние между мечевидными щетинками (Я-1-2) на голени ног I 12 цт.
Права: © Автор (2023). Опубликовано Российским государственным педагогическим университетом им. А. И. Герцена. Открытый доступ на условиях лицензии СС БУ-ЫС 4.0.
Ключевые слова: Hydrachnidia, Hygrobatidae, Atractides, водяные клещи, морфология, самец
Introduction
This paper describes a new water mite species of the family Hygrobatidae. The material was sampled by V. Stolbov from running waters of Kazakhstan with a common hand net with 250 |im mesh size, sorted in the field and fixed 75% ethanol. Specimen was dissected and slide mounted in Hoyer's medium.
Idiosomal setae are named according to Tuzovskij (1987), legs setae are named according to Gerecke (2003). The following abbreviations are used: ac. 1-3 — genital acetab-ula; a. s. l. — above sea level; D — diameter; L — length; mL — medial length; n = number of specimens measured; P-1-5 — pedipalp segments (trochanter, femur, genu, tibia and tarsus); S-1 — proximal sword seta on tibia of leg I; S-2 — distal sword seta on tibia of leg I; W — width; I-Leg-1-6 — first leg, segments 1-6 (trochanter, basifemur, telofemur, genu, tibia and tarsus) i.e. III-Leg-4 = genu of third leg, I-Leg-6: HA = basal height, HB = height in the centre, HC = distal height. All measurements are given in micrometers (^m); length
of appendage segments is given as dorsal length. The holotype is deposited in the collection of the Papanin Institute for Biology of Inland Waters (Borok, Russia).
Systematics Family Hygrobatidae Koch, 1842 Genus Atractides Koch, 1837
Atractides (Atractides ) turkestanicus sp. nov.
https://www.zoobank.org/NomenclaturalActs/
B19BAC1F-B38E-45C9-9B5E-B38ADC19C4C3 (Figs 1-5)
Type material. Holotype: male, slide 9961, Asia, Kazakhstan, Turkestan Province, Tju-lkubassky District, Aksu-Zhabagly Nature Reserve, Taldybulak stream, 42°25'01.9"N, 70°28'22.3"E, 1230 m a. s. l., depth about 0.5 m, substrates: large stones, mosses, 10.08.2019, leg. V. Stolbov.
Diagnosis. Male (Female unknown). Integument smooth; muscle attachment unscle-rotized, coxal plates I+II close to coxal plate III+IV but not forming a coxal shield; excretory pore smooth; genital plate wider long, with
Figs. 1-3. Atractides turkestanicus sp.nov., male: 1 — idiosoma, ventral view; 2 — genital plate; 3 — chelicera, Scale bars: 1, 3 = 100 цт, 2 = 50 цт
Рис. 1-3. Atractides turkestanicus sp.nov., самец: 1 — вентральная сторона; 2 — генитальная пластина; 3 — хелицера. Шкалы: 1, 3 = 100 цт, 2 = 50 цт
Figs. 4-5. Atractides turkestanicus sp.nov., male: 4 — pedipalp, lateral view; 5 — I-Leg-4-6. Scale bars: 4, 5 = 50 pm
Рис. 4-5. Atractides turkestanicus sp.nov., самец: 4 — педипальпа, боковая сторона; 5 — нога I-Leg-4-6. Шкалы: 4, 5 = 50 pm
23-24 fine setae on each side, anterior margin straight, narrowed posteriorly, acetabula in triangular position; capitular bay V-shaped; P-2 expanded dorsoventrally, with moderately large ventrodistal protrusion; P-3 longer than P-2, with four thick subequal setae; P-4 sword seta between ventral setae; S-1-2 separation 12 pm.
Description
Male. Color in life unknown. Idiosoma elongate (L/W ratio 1.9), integument smooth, muscle insertions unsclerotized. Coxal plates I+II close to coxal plates III+IV at their touching edges, but not forming a coxal shield (Fig. 1). Posteromedial margin of coxal plates I+II narrow slightly convex, apodemes of anterior coxal groups short directed laterally. Median suture line between coxal plates I distinct, central sub-dermal projection small and a little extending beyond posterior margin. Capitular bay V-shaped. Seta and glan-dularium Hv situated in posterolateral part of coxal plate II. Medial margin of coxal plates
III+IV straight forming an obtuse angle, glan-dularium and seta Pe situated near anterior margin of coxal plate IV, posterior margin of coxal plate IV straight. The setae Pi and Ci separated, excretory pore unsclerotized. Genital plate (Fig.2) wider than long (L/W ratio 0.85), anterior margin straight, posterior margin moderately indented, bearing 23-24 fine setae on each side, acetabula rather large in an obtuse triangle.
Chelicera with large basal segment and short pointed chela (Fig. 3).
Pedipalp (Fig. 4) stout: P-1 short, thin with a single short dorsodistal seta; P-2 expanded dorsoventrally (L/H ratio about 1.0), with distinct ventrodistal protrusion, bearing three proximal (one short seta and two long ones), and two unequal dorsosodistal setae; P-3 with four subequal thick setae, ventral margin slightly convex in distal half; P-4 strong expanded near proximal seta, sword seta short pointed and located between ventral setae, bases of ventral setae divide tibia into three unequal sectors (1:2:1), dorsal setae numer-
746
https://www.doi.org/10.33910/2686-9519-2023-15-4-744-748
Figs. 6-7. Atractides: 6 — A. tienshanensis, pedipalp; 7 — A. aksuensis, pedipalp. Scale bars: 6, 7 = 50 цт
Рис. 6-7. Atractides: 6 — A. tienshanensis, педипальпа; 7 — A. aksuensis, педипальпа. Шкалы: 6, 7 = 50 цт
ous located in central and distal parts of segment.
All legs without swimming setae. I-Leg-5 seta S-1 and S-2 distally narrowed (Fig. 5), bluntly pointed, S-1 longish, S-2 thicker than S-1, proximally enlarged, distance between S-1 and S-2 short; I-L-6 ventral margin curved distally, basally thickened, in distal part narrowed, distinctly shorter than I-Leg-5 (I-Leg-5/6 ratio 1.3).
Measurements (n = 1). Idiosoma L 725, W 375; coxal plates I-IV L 325, W 435, mL 125; genital plate L 105, W 125; genital acetabula (ac. 1-3) L/W: 35/30, 42/24, 42/30; glandu-laria D: 25-37; pedipalp total L 245, L/H, L/H ratio: P-1, 30/24, 1.25; P-2, 54/54, 1.0; P-3, 69/42, 1.42; P-4, 78/36, 2.16; P-5, 24/12, 2.0; leg segments, L: I-Leg-1-6: 59, 62, 87, 125, 160, 112; II-Leg-1-6: 50, 62, 75, 100, 112, 110; III-
Leg-1-6: 55, 60, 75, 125, 150, 135; IV-Leg-1-6: 110, 85, 135, 175, 212, 165; I-Leg-6: HA = 36, HB = 30, HC =24; I-Leg-6, distance between S-1 and S-2 12; S-1 L/W, L/W ratio 78/12, 6.5; S-2 L/W, L/W ratio 60/15, 4.0.
Differential diagnosis. The present species is similar to Atractides tienshanensis Pesic & Smit, 2021 and A. aksuensis Tuzovs-kij, 2022 in the structures of coxal plates and appendages. The new species differs from A. tienshanensis in the following characters (character states of male A. tienshanensis are indicated in parentheses, data from Pesic & Smit 2021): the integument smooth (striated), the genital plate with straight anterior margin, bearing 23-24 fine setae on each side (with convex anterior margin, bearing 15-18 setae; P-2 with distinct ventrodistal protrusion, Fig. 2 (P-2 ventrodistal margin convexly pro-
truding, Fig. 6), I-Leg-5 S-1 and S-2 relatively short, 78 and 60, respectively (rather long, 89-91 and 69-74, respectively). Atractides turkestanicus sp. nov. especially differs from A. aksuensis by the structure of pedipalp: P-2 strong expanded dorsoventrally (L/H ratio 1.0), P-3 with four thick dorsal setae; in contrast, in male A. aksuensis P-2 not strong expanded dorsoventrally (L/H ratio 1.1-1.2), P-3 with six thick setae (Fig. 7): four dorsal and two distoventral setae (Tuzovskij 2022).
Etymology. The species is named after the Province (Turkestan) where it was collected.
Habitat. Running waters.
Distribution. Asia: Kazakhstan: Turkestan Province.
Acknowledgements
This research was conducted as part of the state-commissioned assignment of FASO Russia (topic No. 0122-2014-0007). The field work in Kazakhstan was support by grant of the Russian Science Foundation, project No. 19-14-00004 to P. B. Klimov. I express my sincere gratitude to V. Stolbov and S. D. Ju-manov (Kazakhstan) for the material supplied and to the anonymous referees for reviewing the manuscript.
For citation: Tuzovskij, P. V. (2023) Description of a new water mite species of the genus Atractides Koch, 1837 (Acari, Hydrachnidia, Hygrobatidae) from Kazakhstan. Amurian Zoological Journal, vol. XV, no. 4, pp. 744—748. https://www.doi.org/10.33910/2686-9519-2023-15-4-744-748
Received 25 May 2023; reviewed 16 October 2023; accepted 13 November 2023.
Для цитирования: Тузовский, П. В. (2023) Описание нового вида водяного клеща рода Atractides Koch, 1837 (Acari, Hydrachnidia, Hygrobatidae) из Казахстана. Амурский зоологический журнал, т. XV, № 4, с. 744748. https://www.doi.org/10.33910/2686-9519-2023-15-4-744-748
Получена 25 мая 2023; прошла рецензирование 16 октября 2023; принята 13 ноября 2023.
References
Gerecke, R. (2003) Water mites of the genus Atractides Koch, 1837 (Acari: Parasitengona: Hygrobatidae) in the western Palaearctic region: a revision. Zoological Journal of the Linnean Society, vol. 138, no. 2-3, pp. 141-378. https://doi.org/10.1046/j.1096-3642.06-0.00051.x (In English) Pesic, V., Smit, H. (2021) Water mites of the genus Atractides Koch, 1837 from Kyrgystan (Acari: Hydrachnidia: Hygrobatidae) with the description of six new species. Acarologia, vol. 61, no. 2, pp. 332-355. https://doi.org/10.24349/acarologia/20214434 (In English) Tuzovskij, P. V. (1987) Morfologiya i postembryonal'noe razvitie vodyanykh kleshchej [Morphology and
postembryonic development in water mites]. Moscow: Nauka Publ., 172 p. (In Russian) Tuzovskij, P. V. (2022) Two new water mite species of the genus Atractides Koch (Acari, Hydrachnidia: Hygrobatidae) from Asia. Zootaxa, vol. 5188, no. 2, pp. 195-200. https://doi.org/10.11646/ ZOOTAXA.5188.2.9 (In English)
