CC BY
20ж
Амурский зоологический журнал, 2020, т. XII, № 4
Amurian Zoological Journal, 2020, vol. XII, no. 4
www.azjournal.ru
UDC 595.426 DOI: 10.33910/2686-9519-2020-12-4-439-443
http://zoobank.org/References/1D4EEBD9-BA07-4543-A6A9-F30F129DB045
A NEW WATER MITE SPECIES OF THE GENUS HYGROBATES KOCH, 1837 (ACARI, HYDRACHNIDIA, HYGROBATIDAE)
FROM RUSSIA
P. V. Tuzovskij
Papanin Institute for Biology of Inland Waters of the Russian Academy of Sciences, Yaroslavskaya Region 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 male of a new species Hygrobates neosokolowi sp. nov. from running waters of Primorsky Krai of Russia is given. The genital field of the new species with large genital acetabula occupying about one half of acetabular plate surface, posteromedial indentation without median projection, genital field with 24-25 pairs setae, five pairs longer and thicker than other genital setae.
Copyright: © The Author (2020). Published by Herzen State Pedagogical
University of Russia. Open access under Keywords: Hydrachnidia, Hygrobatidae, Hygrobates, water mites, morphology, CC BY-NC License 4.0. male.
НОВЫЙ ВИД ВОДЯНОГО КЛЕЩА РОДА HYGROBATES KOCH, 1837 (ACARI, HYDRACHNIDIA, HYGROBATIDAE)
ИЗ РОССИИ
П. В. Тузовский
Институт биологии внутренних вод РАН им. И. Д. Папанина, Некоузский район, Ярославская область,
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 водяного клеща Hygrobates пеозоко1ок1 sp. nov. из проточных вод Приморского края России. Генитальное поле нового вида с крупными генитальными присосками, занимающими около половины поверхности генитальной пластины, с 24-25 парами щетинок, 5 пар из них длиннее и толще, чем другие генитальные щетинки.
Права: © Автор (2020). Опубликовано Российским государственным педагогическим университетом им. А. И. Герцена. Открытый доступ на условиях лицензии СС БУ-ЫС 4.0.
Ключевые слова: Hydrachnidia, Hygrobatidae, Hygrobates, водяные клещи, морфология, самец.
INTRODUCTION
This paper describes the male of a new water mite species, Hygrobates neosokolowi. The material was collected by T. S. Vshivkova in the running waters in the Far East of Russia. Idiosomal setae are named according to Tuzovskij (1987). Furthermore, the following abbreviations are used: P-1-5, pedipalp segments (trochanter, femur, genu, tibia and tarsus); I-leg-1-6, first leg, segments 1-6 (tro-chanter, basifemur, telofemur, genu, tibia and tarsus) i.e. I-Leg-1 = trochanter of first leg; L—length; W—width; n = number of specimens measured; all measurements are given in micrometers (^m).
SYSTEMATICS Family Hygrobatidae Koch, 1837
Genus Hygrobates Koch, 1837 Hygrobates neosokolowi sp. nov.
http://zoobank.org/ References/1D4EEBD9-BA07-4543-A6A9-F30F129DB045
(Figs 1-8)
Type material: Holotype: male, slide 6301, Russia, Primorsky Krai, Rakovka stream, 17 July 1978, leg. T. S. Vshivkova. Holotype is deposited in the collection of the Papanin Institute for Biology of Inland Waters (Borok, Russia).
Diagnosis. Integument soft and finely striated; anterior coxal plates with short apodemes, posteromedial margin convex in shape; coxal plate IV trapezoidal with almost parallel anterior and posterior margin, medial margin in an obtuse angle; genital field with three pairs large genital acetabula and 24-25 pairs setae, posterior margin of genital plate of male deeply indented without median projection; P-2 with long rounded ventrodistal protrusion; P-4 ventral setae moderately separated in distal portion of segment.
Description
Male. Idiosoma oval and somewhat flattened dorsoventrally. Integument soft and finely striated (Fig. 1). Trichobothria Fp, Oi and setae Pi not associated with glandularia, other idiosomal setae associated with glandu-laria. Setae Fch (Fig. 2) much thicker than other idiosomal setae. Anterior coxal plates with short apodemes, posteromedial margin con-
vexin shape (Fig. 3). Coxal plate IV trapezoidal, with nose-like protruding medial margin.
Genital field (Fig. 4) wider than long (L/W ratio 0.7), anterior margin slightly convex, with a small median protrusion, posterior margin deeply indented without median projection. Genital acetabula large in obtuse triangle, distance between ac-1 and ac-2, ac-2 and ac-3, and ac-1 and ac-3 less than length of any acetabulum. Genital field with 24-25 pairs setae, five pairs longer and thicker than other genital setae.
Pedipalp moderately long (Fig. 5): P-1 short, with single dorsodistal seta; P-2 with five short, thick dorsal setae, ventral margin proximally nearly straight, distoventrally protruding in a long and slender projection with rounded tip, apically covered by a few denticles; P-3 with three dorsoproximal, two dorsodistal short, thick setae and single thin dorsodistal seta, ventral margin straight with denticles covering distal half of ventral surface; P-4 slender, longer than P-2 (P-4/P-2 L ratio 1.3), ventral setae subequal in length and moderately separated in distal portion of segment.
Legs—6, segmented, slender and without swimming setae. I-Leg-5 with two subequal rather long pointed distoventral setae (Fig. 6); IV-Leg-4/5 with three short, thick unequal distal setae, IV-Leg-6 usually with two short, thick ventral setae (Fig. 7). Claws of all legs with long external clawlet and short internal one, lamella well-developed with slightly concave ventral margin (Fig. 8).
Measurements (n = 1). Idiosoma L 870; seta Fch L 90; coxal plates I + capitulum mL 265; coxal plates III+IV L 300, W 250; genital plate L 120, W 175; genital acetabula (ac-1-3) L/W 80-85/54-60, 102-105/48-54, 95-98/72-78; pedipalp segments (P-1-5) L: 42, 126, 108, 162, 48; leg segments L: I-Leg-1-6: 60, 110, 115, 162, 168, 150; II-Leg-1-6: 65, 100, 120, 175, 190, ?; III-Leg-1-6: 78, 108, 132, 210, 240, 192; IV-Leg-1-6: 145, 150, 175, 240, 270, 210.
Female. Unknown.
Differential diagnosis. The new species is similar to Hygrobates sokolowi Thor, 1927. The male of the new species differs in genital field (Fig. 4) with large genital acetabula occupying about one half of acetabular plate surface, distance between ac-1 and ac-3 less than length of any acetabulum, posteromedial in-
Figs 1-4. Hygrobates neosokolowi sp. п., male: 1 — fragment of integument; 2 — seta Fch; 3 — ventral view; 4 — genital field. Scale bars: 1, 2, 4 = 50 цт; 3 = 100 цт
Рис. 1-4. Hygrobatesneosokolowi sp. n., самец: 1 — фрагмент покрова; 2 — щетинка Fch; 3 — вентральная сторона; 4 — генитальное поле. Шкалы: 1, 2, 4 = 50 цт; 3 = 100 цт
dentation without median projection, genital field with 24-25 pairs setae, five pairs longer and thicker than other genital setae. In contrast, H. sokolowi male genital field with small
genital acetabula occupying much less than one half of acetabular plate surface, distance between ac-1 and ac-3 larger than length of any acetabulum, posteromedial indentation
with median projection, genital field with 1719 pairs setae, three pairs longer and thicker than other genital setae (Fig. 9).
Etymology. The species' epithet, neosokolowi, is derived from the name of Hygrobates sokolowi.
Habitat. Running waters.
Distribution. Asia (Russia, Primorsky Krai).
Figs 5-9. Hygrobates neosokolowi sp.n., male: 5 — pedipalp; 6 — I-Leg-4-6; 7 — IV-Leg-4-6; 8 — leg claw. Scale bars: 5, 8 = 50 цт; 6, 7 = 100 цт. Hygrobates sokolowi (Thor, 1927), male: 9 — genital field. Scale bar: 50 цт
Рис. 5-9. Hygrobates neosokolowi sp. n., самец: 5 — педипальпа; 6 — колено, голень и лапка ноги I; 7 — колено, голень и лапка ноги IV; 8 — коготок ног. Шкалы: 5, 8 = 50 цт; 6, 7 = 100 цт. Hygrobates sokolowi (Thor, 1927), самец: 9 — генитальное поле. Шкала: 50 цт
ACKNOWLEDGEMENTS
This research was performed in the framework of the state assignment of FASO Russia (theme No. 0122-2014-0007). The author ex-
presses his sincere gratitude to T. S. Vshivkova for the rnaterial and anonyrnous referees for reviewing the rnanuscript.
References
Tuzovskij, P. V. (1987) Morfologiya i postembrional'noe razvitiye vodyanykh kleshchej [Morphology and postembryonic development of water mites]. Moscow: Nauka Publ., 172 p. (In Russian)
For citation: Tuzovskij, P. V. (2020) A new water mite species of the genus Hygrobates Koch, 1837 (Acari, Hydrachnidia, Hygrobatidae) from Russia. Amurian Zoological Journal, vol. XII, no. 4, pp. 439-443. DOI: 10.33910/2686-95192020-12-4-439-443
Received 2 September 2020; reviewed 1 November 2020; accepted 2 November 2020.
Для цитирования: Тузовский, П. В. (2020) Новый вид водяного клеща рода Hygrobates Koch, 1837 (Acari, Hydrachnidia, Hygrobatidae) из России. Амурский зоологический журнал, т. XII, № 4, с. 439-443. DOI: 10.33910/2686-9519-2020-12-4-439-443
Получена 2 сентября 2020; прошла рецензирование 1 ноября 2020; принята 2 ноября 2020.
