Ekaterina A. Sidorchuk

Ekaterina A. Sidorchuk
Russian Academy of Sciences | RAS · Paleontological Institute

PhD

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83
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Publications

Publications (83)
Article
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We describe two species of soil mite of the family Paratydeidae from the late Eocene Rovno amber: Scolotydaeus vlaskini sp. nov. and Tanytydeus pogrebnyaki sp. nov. This is the first formal description of fossils from the family Paratydeidae. These exceptionally well-preserved fossils have very similar morphologies compared to extant species, sugge...
Article
The discovery of active postlarval forms (deutonymph and adult) of erythraeid Eatoniana in Eocene Baltic amber is associated with the first description of named fossil species assigned to that genus. Species of Eatoniana, having the plume-like setae on terminal segments of leg IV, reveal the high consistency of characters, confirmed both for extinc...
Article
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Preparation of a piece of amber is an inevitable step for any paleontologist working with this precious medium. To see the life-like detail of a biological inclusion, the fossil resin itself has to be trimmed to the minimum, then surfaces polished flat for viewing of the fossil, preferably from all sides. This concerns inclusions of any size, but t...
Article
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Smallness being in the essence of a mite, the question is whether it has always been so during the geological history of Acari. Here I assemble measurements of over 260 published mite fossils, distributed from the Early devonian (410 mya) to the end of the Neogene (5 mya), and compare them to the data available for their extant relatives. A number...
Article
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The Convention on Biological Diversity (CBD) commits its 196 nation parties to conserve biological diversity, use its components sustainably, and share fairly and equitably the benefits from the utilization of genetic resources. The last of these objectives was further codified in the Convention's Nagoya Protocol (NP), which came into effect in 201...
Article
The oldest-known member of a small parasitic mite family Pterygosomatidae (Trombidiformes: Eleutherengona) was found in the Lower Cretaceous (Albian) amber locality of Archingeay-Les Nouillers in Charente-Maritime, France. The majority of the extant members of the family are obligate parasites of lizards, and only one genus of twelve, Pimeliaphilus...
Article
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Tuckerellidae are suctorial plant feeders with a wide host range, exploiting both aboveground and underground plant parts. A new species, Tuckerella weiterschani n. sp., is described from Eocene (ca. 40 mya) Baltic amber, and Tuckerella fossilibus Khaustov, Sergeyenko & Perkovsky, 2014 from Eocene Rovno (Ukrainian) amber is redescribed, each based...
Article
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Tetrapods are rarely recovered from fossil resins, such as amber, and fossils of parasites are even rarer. We describe the first pre-Quaternary co-occurrence of ectoparasitic mites with hairs of their mammalian hosts, preserved in life-like detail from a piece of Eocene (∼ 40 Ma) Baltic amber. The mites, representing the oldest fossils of the famil...
Article
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This is the first record of the intentional consumption of moss spores by an arthropod. A moss mite Kunstidamaeus lengersdorfi (Oribatida: Damaeidae) was observed in Moscow Province, Russia, as regularly visiting mature capsules of the moss Schistostega pennata (Schistostegaceae) and eating spores from the opened capsules. The spores of Schistosteg...
Article
Canadian Cretaceous amber belongs to the Taber Coal Zone, and was deposited in beds of coal and shale saturated with organic matter. It is upper Campanian (~76-72 million years ago), and the source of the original resin is predominantly the plant genus Parataxodium Arnold and Lowther (Cupressaceae). We describe the first oribatid mite from this amb...
Article
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A new species of predaceous mite, Cheletomimus (Hemicheyletia) crinitus sp. nov. (Acariformes: Cheyletidae), is described from Eocene Baltic amber based on a fossil female. Among species of the genus, it belongs to the C. (H.) wellsi species group (16 extant species) and differs from the closely morphologically related species, C. greenwoodi by the...
Article
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Symbiosis [1], understood as prolonged interspecific association, is as ancient as the eukaryotic cell [2, 3]. A variety of such associations have been reported in the continental fossil record, albeit sporadically. As for mites, which as a group have been present since the Devonian (ca. 390 mya) [4, 5] and are involved in a tremendous variety of m...
Article
We describe a fossil member of Heterostigmata of Late Cretaceous age that is the first to show an unexpected array of primitive and derived attributes, some of which are perplexing for a member of this specialized group of trombidiform mites. In contrast, previously published records of heterostigmatic mites of similar age have been of fossils read...
Article
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Three extant species of the oribatid mite genus Collohmannia (Collohmanniidae) have been named, of which two, C. gigantea Sellnick, 1922 and C. johnstoni Norton et Sidorchuk, 2014, are well known. The third—C. asiatica Krivolutsky et Christov, 1970—is known only from a brief, insufficient original description. Our purpose was to study and illustrat...
Article
The species composition and distribution of oribatid mites by altitudinal zones of the northeastern slope of Vud’yavrchorr Mount in the Khibiny Mountains were studied. Fifty-two species of oribatids from 30 genera and 20 families were found; 21 species were found in the Khibiny region for the first time. The maximum number of species (33) were foun...
Article
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Following the discovery of the genera Labidostomma and Sellnickiella in Paleogene amber, a fossil of the genus Eunicolina was found for the first time in a piece of Baltic amber from the Hoffeins collection. The genus is known by four extant species: three European and one American. Eunicolina is distinguished notably by the multiplication of the p...
Article
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Hypotheses are reviewed concerning which segments of the primitively five-segmented palpus are coalesced to form the simple, linear, four-segmented form characteristic of labidostommatid mites. Among alternatives, those of either a femurogenu or a tibiotarsus are not based on convincing evidence. Instead, based on ontogeny of the peculiar palpal st...
Article
The purpose of this application, under Article 23.9.3 of the Code, is to conserve the widely used oribatid mite genus name Collohmannia Sellnick, 1922, which is threatened by the obscure senior subjective synonym Embolacarus Sellnick, 1919. The latter is based on a single fossil species whose type and only known specimen is lost; most subsequent li...
Article
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Исследован видовой состав и особенности распределения панцирных клещей по высотным поясам северо-восточного склона г. Вудъяврчорр Хибинского горного массива. Обнаружено 52 вида орибатид из 30 родов и 20 семейств; 30 видов обнаружено в Хибинах впервые. Максимальное число видов (33) зарегистрировано в горно-таежном поясе, в ельнике травяно-кустарничк...
Article
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Collohmannia (Collohmanniidae) is a genus of physically large oribatid mites with low extant diversity and high endemism. It includes the only species outside Brachypylina known to exhibit strong sexual dimorphism and courtship behavior, including nuptial feeding, and it has phylogenetic importance as a possible close outgroup of the diverse mixono...
Article
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The drawing system we describe consists of a microscope, digital video camera, computer with a mouse or a pen tablet, and freely available software. The system uses an overlay technology that allows drawing with either raster or vector software, using a live image background that is translated either from the microscope via a digital camera or from...
Article
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Carnian-aged amber (c. 230 Ma) from north-eastern Italy contains the first pre-Cretaceous inclusions of arthropods, plant remains and microorganisms. Here, we report further recovery of mites from this Late Triassic amber, supporting the prediction of a diversity of arthropods to be found in this oldest known fossiliferous resin. Two new genera and...
Article
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Modern-looking labidostomatid mites were found in collections of Eocene amber from diverse origins. Six of ten specimens from Baltic amber could be unequivocally assigned to the extant genus Labidostoma Kramer, 1879. These specimens showed affinities, notably by cheliceral morphology, with the extant Holarctic subgenus Cornutella, comprising large...
Chapter
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Small preparations are necessary to receive high-resolution morphological data on minute amber inclusions, like mites, tiny insects, pollen, fungi, etc. For mites, observations from four to six sides are often necessary for an accurate identification and systematic description. The main difficulty of such preparation is that human hand is not preci...
Article
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In 2009–2010, a total of 99 species, 75 genera and 45 families of oribatid mites in Ethiopia were registered. Of these, 89 species, 55 genera and 26 families are first records for the country. The updated list of oribatids of Ethiopia includes 128 species, 94 genera and 55 families. An annotated checklist of oribatid mite taxa of Ethiopia with know...
Article
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Three new species of oribatid mites of the superfamily Galumnoidea, Galumna lanceosensillan. sp., Trichogalumna africanan. sp. (both Galumnidae), and Galumnopsis giganteusn. sp. (Galumnellidae), are proposed and described. All new species were collected in soil from Bale Mountains National Park of Southern Ethiopia.
Article
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Four new species of oribatid mites of the superfamily Ceratozetoidea, Ceratozetes baleensis sp. n. (Ceratozetidae), Ocesobates schatzi sp. n. (Chamobatidae), Africoribates subiasi sp. n. and A. amorphus sp. n. (both Humerobatidae), are described from southern Ethiopia. The first two species were collected in soil from Harenna Forest of Bale Mountai...
Article
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The oribatid mite family Archaeorchestidae was proposed based on a single specimen of Archaeorchestes minguezae Aril-lo & Subías, 2000, from Lower Cretaceous amber (Spain). In a previous paper we redescribed Strieremaeus illibatus Sell-nick, 1918, from Eocene Baltic and Rovno amber, and considered Strieremaeus a senior synonym of Archaeorchestes. H...
Article
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The oribatid mite genus Separatoppia currently comprises four previously described species. We describe a new species, Separatoppia horvathae sp. nov., collected from soil in the Harenna forest within the Bale Mountains National Park (southeastern Ethiopia). This new species differs from its congeners by the extremely long sensilli. We present the...
Article
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Strieremaeus is one of several oribatid mite genera proposed by Max Sellnick based on adult specimens preserved in Eo-cene Baltic amber. The original specimens of its type-species—S. illibatus Sellnick, 1918—were lost and the genus has received no further empirical study. For many years Strieremaeus was included in the family Eremaeidae, but recent...
Article
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Glaesacarus rhombeus (= Acarus rhombeus Koch Berendt, 1854) from the Upper Eocene Baltic amber is the oldest known fossil of Astigmata, and therefore is important for calibrating the molecular clock for mite phylogenies and inferring the direction of character state changes in phylogenetic analyses. Based on the imprecise original description, it h...
Article
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We describe Basilobelba gigantea sp. n. and redescribe Heterobelba spumosa, collected in soil of Bale Mountains National Park (African region, Ethiopia). Basilobelba gigantea sp. n. is most similar in morphology prodorsal and epimeral setae, number of notogaster setae, morphology of arched scalp-attachment structures, weakly neotrichy on ventral pl...
Article
It is generally assumed that male control over mating and a lack of precopulatory female choice are prevalent in many animals and in astigmatan mites in particular. We show that several morphological structures of females of some astigmatan mites are indicative of precopulatory female choice: (1) copulatory tubes acting like intromittent organs; (2...
Article
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The monotypic oribatid mite genus Scutoribates Sellnick, 1918 has been based only on fossil specimens of the type species—S. perornatus Sellnick, 1918—from Baltic amber. The type specimen is lost, and the genus has been assumed to be a junior subjective synonym of Eremaeozetes (Eremaeozetidae). Herein, we redescribe S. perornatus based on stereo-an...
Conference Paper
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Описана методика приготовления мелких, порядка 1 мм, объёмных (доступных для изучения с шести сторон) препаратов янтаря для исследования микроскопических включений. Будучи разработанной для исследования включений клещей в балтийском сукцините, методика может быть применена для обработки любого достаточно прочного материала, из которого необходимо и...
Article
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Two new species of oribatid mites of the subgenus Austrocarabodes (Uluguroides), A. (U.) arboreus sp. nov. and A (U.) aethiopicus sp. nov., are described from Ethiopia. The former species was obtained in mosses on trees from Cholomu Forest (10 km to the south from Ginchi city); the second species was obtained from soil from Harenna Forest (Bale Mou...
Article
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The oribatid mite genus Dolicheremaeus comprises more than 160 species. We describe a new species, Dolicheremaeus aethiopicus sp. nov., collected in soil from Bale Mountains National Park (African region, Ethiopia). This new species differs from other species by a combination of the length of prodorsal setae; morphology of rostral setae and sensill...
Article
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The morphology of juvenile stages of the oribatid mites Metabelba glabriseta Mahunka, 1982 and Damaeus auritus Koch, 1835 (Damaeidae) is described and illustrated. The juveniles of Metabelba glabriseta are characterized by: cuticle smooth, with rare folds and also with slightly developed reticulate ornamentation dorso-laterally; cerotegument of bod...
Article
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Three new species of oribatid mites of the superfamily Galumnoidea, Pilizetes anufrievi sp. nov., Taeniogalumna behanae sp. nov., Galumnella baleensis sp. nov., are described from Bale Mountains National Park (African region, Ethiopia). Keys to closely related species of these genera are presented.
Article
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The morphology of juvenile stages of the oribatid mites Pedrocortesella africana Pletzen, 1963 and Aleurodamaeus africanus Mahunka, 1984 is described and illustrated. The juveniles of Pedrocortesella africana are characterized by: cuticle with reticular ornamentation and folds; body with microgranular cerotegument; prodorsal setae leaf-shaped, sens...
Article
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We described Machadobelba shtanchaevae sp. nov. and Microtegeus khaustovi sp. nov., collected in Bale Mountains National Park (Africa, Ethiopia). The first new species is similar to Machadobelba symmetrica Balogh, 1958 (Distribution: Africa, Congo) and to Machadobelba ceylonica Balogh, 1970 (Asia, Sri Lanka), but differs from the former species by...
Article
В статье мы делимся собственным опытом создания удобного и недорогого рисовального аппарата на базе микроскопа и компьютера.
Data
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В статье мы делимся собственным опытом создания удобного и недорогого рисовального аппарата на базе микроскопа и компьютера.
Article
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The oribatid mite genus Pergalumna Grandjean, 1936 (Acari: Oribatida: Galumnidae) comprises 111 species. We describe the species Pergalumna makarovae sp. nov., collected in moss on trees from Bale Mountains National Park (southern Ethiopia). The new species is distinguishable from other species of Pergalumna by the presence of the following charact...
Article
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Two new species of oribatid mites, Plasmobates foveolatus sp. n. and Arcoppia arborea sp. n., are described from Ethiopia. First species was obtained from soil in Harenna Forest (Bale Mountains National Park); second species was obtained from mosses on trees in Cholomu Forest (10 km to the south from Ginchi city). Plasmobates foveolatus sp. n. belo...
Article
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The oribatid mite genus Zetorchella (Acari: Oribatida: Caloppiidae) comprises 16 species. We describe Zetorchella nortoni sp. n., collected in mosses on trees from Ethiopia. The new species is most similar to Zetorchella orbiculata Wen, Zhao, 1994 (Asia, China), but differs from this species by the length of the body, the morphology of sensilli, th...
Article
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Two new species of oribatid mites of the family Carabodidae, Carabodes (Klapperiches) dilatatus sp, n. and Austrocarabodes (Austrocarabodes) heterosetosus sp. n. are described from Ethiopia. Carabodes {Klapperiches) dilatatus sp. n. belongs to the species group with clavate sensilli, interlamellar and notogastral setae dilated apically, surface of...
Article
The taxonomic position of the genus Palaeonothrus Krivolutskii et Sidorchuk, 2003 described from the Holocene of Arkhangelsk oblast is reconsidered. The fossils, which were originally attributed to moss mites (Acariformes: Oribatida), turned out to be isolated mesonota of some Ichneumonidae or Braconidae wasps, which were impossible to identify mor...
Article
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The fauna of oribatid mites in soils of the polar Ural mountains (the lower Malaya Paipudyna River, Labytnangi District, Yamal-Nenets Autonomous Area, 67°06′N, 65°20′E) was studied. Samples from the upper soil layer and litter were collected along a transect running from the floodplain to the mountain lichen tundra (from 150 to 520 m a.s.l.. A tota...
Data
Пересмотрено таксономическое положение рода Palaeonothrus Krivolutskii, Sidorchuk, 2003, описанного по ископаемым остаткам из голоценовых отложений и отнесенного авторами к панцирным клещам (Acariformes: Oribatida). Ископаемые оказались изолированными среднеспинками каких-то ближе не определенных наездников из семейств Ichneumonidae или Braconidae....
Data
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К ФАУНЕ ПАНЦИРНЫХ КЛЕЩЕЙ (ACARIFORMES, ORIBATIDA) ПОЛЯРНОГО УРАЛА Е.А. Сидорчук Лаборатория артропод Палеонтологического института РАН, Москва 117997, Россия e-mail: esidorchuk@rambler.ru На Полярном Урале, в нижней части долины р. Малая Пайпудына (Лабытнангский район Ямало-Ненецкого НО, около 67˚06' с. ш., 065˚20' в. д.) проведено исследование фау...
Article
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Oribatids from three oxbow fens in Kostroma, Kirov, and Arkhangelsk provinces were studied. A total of 2800 adult mites belonging to 74 species were collected. The similarity of the faunas and communities in these fens is rather low, the Jaccard and Naumov coefficients constituting 22–37% and 11–22%, respectively. From the central part of each fen...
Conference Paper
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Представлена палеоэкологическая реконструкция условий в низовьях р. Вычегда в голоцене по данным спорово-пыльцевого анализа и анализа ископаемых комплексов панцирных клещей.
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Изучено население орибатид трех низинных старичных болот в Костромской, Кировской и Архангельской обл. Собрано 2800 взрослых орибатид 74 видов. Фаунистическое сходство и сходство населения изученных болот невелико: коэффициент Жаккара 22-37%, коэффициент Наумова 11-22%. От центральных частей изученных болот к их перифериям возрастают видовое богатс...
Article
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THE ECOLOGICAL CONSEQUENCES OF THE INTRODUCTION OF THE COMMON BRUSHTAIL POSSUM TO NEW ZEALAND The complex of the harmful consequences brought about by an ill-considered introduction of common brushtail possum to New Zealand is discussed. An analysis of possum’s specific ecological features carried out, as these features are important for the under...
Article
The whole range of adverse effects of the commom brushtail possum introduction to New Zealand is discussed. The ecological characteristics of the species which govern its behavior in a new environment are analyzed. The history of the islands settlement with the invasive species, its impact on the vegetation cover, animals and economy of the country...
Article
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THE ORIBATID MITES AS BIOINDICATORS OF THE HOLOCENE PALAEOGEOGRAPHICAL CONDITIONS OF THE NORTHETN EUROPEAN RUSSIA We have investigated fossil oribatids’ faunas from peat deposits in the Arkhangelsk Region. Mites were extracted by the Paraffin Flotation method, which is new for Russia. Of 46 species, 34 genera and 25 families found, 27 species and...
Article
We have investigated fossil oribatids' fauna from peat deposits in Arkhangelsk Region. Mites were extracted by the Paraffin Flotation method, which is new for Russia. Out of 46 species, 34 genera and 25 families found, 27 species and 5 genera are newly known in the fossil state from Russian territory. A number of species and genera are new to the s...
Article
Full-text available
Oribatid mites (moss mites) are microarthropods that inhabit all soils in the world. The history of the studies of moss mites is long. In Russia, C.L. Koch published the first works on mites in the 19th century. However, investigations on fossil oribatids are not numerous in Russia to date. At the same time, studies on subfossil (i.e., fossilized b...
Article
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data [4] is located in the middle reaches of the Vyatka River, where coniferous‐broadleaved forest occurs at present. The second sample was collected at a depth of 1.78‐1.81 m. It has a Subboreal age ( 3250±65 years B.P.). Its modern paleofloristic analogue is located in the Sukhona River basin, near the northern boundary of the southern taiga. Mit...
Article
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The Paraffin Flotation method was first invented and introduced for the extraction of subfossil Arthropod remains from various deposits in Netherlands. The author adapted this method to Russian conditions, found the analogs of necessary materials and worked out the flotation process for extracting oribatid mites' shells from peat. The list of neces...
Article
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The Subboreal fossil oribatid mites (ACARINA, ORIBATEI) fauna from the northern Russian Plain (Arkhangelskaya region) was studied. There were found 27 species, 15 from which are unknown in Holocene deposits in Russia and 12 are not distributed at the site at present. The composition of ecological groups in the fauna indicates conditions typical for...
Article
Fauna of fossil oribatid mites (Acarina, Oribatei) from subboreal sediments of the northern Russian Plain (Arkhangelsk oblast) was studied. Twenty seven species were found, of which 15 are unknown in the Holocene sediments of Russia and 12 are not recorded in the present-day soils of the area of study. The composition of ecological groups in the fo...
Conference Paper
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Investigation of ecology and morphology of Testudo graeca nikolskii on the Abrau Peninsula (Russia) is conducted since 1991. This subspecies inhabits dry subtropics ecosystems of the Mediterranean type along the northeastern Black Sea coast from Anapa City till Pitsunda Peninsula. Tortoises prefer the gentle and terraced slopes of the southern aspe...

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Question (1)
Question
The case is developed to save the actively used oribatid name Collohmannia Sellnick, 1922, threatened by its obscure senior synonym, Embolacarus Sellnick, 1918.
Comments on this case are invited for publication (subject to editing) in the Bulletin; they should be sent to I.C.Z.N., Natural History Museum, Cromwell Road, London SW7 5BD, U.K. (e-mail: iczn@nhm.ac.uk).

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