Theo Zeegers

Theo Zeegers
EIS Kenniscentrum Insecten

Ph.D.

About

77
Publications
23,082
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529
Citations
Citations since 2016
32 Research Items
384 Citations
2016201720182019202020212022020406080
2016201720182019202020212022020406080
2016201720182019202020212022020406080
2016201720182019202020212022020406080
Introduction
Theo Zeegers currently works at EIS Kenniscentrum Insecten, Leiden, NL. His main interests are: * trends in numbers and biomassa of insects and recording those * Diptera, esp. Tabanidae (world) and Tachinidae (old world) * bees of the Netherlands

Publications

Publications (77)
Article
Full-text available
Recently, reports of insect declines prompted concerns with respect to the state of insects at a global level. Here we present the results of long-term insect monitoring from two locations, De Kaaistoep, and nature reserves in Drenthe, both in the Netherlands. We report the trends in beetles (Coleoptera), macro-moths (macro-Lepidoptera), caddis ies...
Article
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ABSTRACT: Continuing with the revision of the Iberian species of the genus Rhagio Fabricius, 1775, Rhagio atlanticus sp. nov. is described as another new species from the Iberian Peninsula. The species has been found in northwestern Spain and the northern half of Portugal. It is closely related to Rhagio scolopaceus (Linnaeus, 1758) and it is compa...
Article
The former military airbase Soesterberg was transformed to a nature reserve in 2009. The fauna of the Diptera and Hymenoptera Aculeata has been investiged since the beginning of this transformation, mostly with Malaise traps. The fauna associated with grasslands is especially rich. The number of recorded species for bees (Apidae s.l.) and pompilid...
Article
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To study insect decline, an important threat to biodiversity, long‐term datasets are needed. Here we present a study of hoverfly (Diptera: Syrphidae) abundance and diversity in a Dutch forest, surrounded by other forests, and analyse the variation in insect numbers over four decades. Between 1982 and 2021, abundance decreased by 80%. Until 1990, ab...
Article
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Soldier flies are a large Diptera family with a diverse larval biology. Larvae of several subfamilies live in decaying organic, usually vegetable material. Some of these species have spread over large parts of the world due to human transport (trade). In this article, we report the first European record of a New World genus with this type of larval...
Article
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Despite its importance for biological control of heteropteran pests (Hemiptera) and remarkable features, the taxonomy of the genus Trichopoda remained confusing for a long time. Due to a recent taxonomic revision, new information about its species real distribution and host records were found out. An invasive species of the genus has been recorded...
Article
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see Titel. Beris hauseri Stuke = Beris nigra Meigen syn.. nov.
Book
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See title. It covers all species of eight families found in UK, DK, NL, B and the north of Germany and France (south to Paris). In dutch. 14 euro, www.jeugdbondsuitgeverij.nl English translation due January 2022.
Article
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Chrysopilus laetus en Ch. nubecula worden beide voor het eerst voor Nederland gemeld. De literatuur is tamelijk onduidelijk over de onderscheidende kenmerken, mede doordat de seksuele dimorfie onderschat is. Wij presenteren een determinatietabel voor de Ch. luteolus-groep die daar wel rekening mee houdt. Alle waarnemingen van Chrysopilus flaveolus...
Article
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Compsilura concinnata (Meigen) is one of the most famous, most polyphagous and most widely distributed tachinid flies (Diptera, Tachinidae) in the world. This species is well known as a biocontrol agent of some injurious pests of cultural and wild plants and has been introduced from Europe to the United States to control mainly the gypsy moth. Rece...
Article
In traditional taxonomy, species are differentiated using morphological arguments, which can be subjective and cause confusion particularly when the initial species descriptions have been inadequate. The development of DNA‐based methods has provided more objective tools to recognize and quantify species differences, as well as enabled the detection...
Article
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A new species of Eumerus , Eumerus druk Smit sp. nov. , is described from Bhutan. This species belongs to the bactrianus subgroup of the strigatus species group. Seven species are currently known within this subgroup: four European, one of which is also found in the Near East, and three more only known from Tajikistan. The new species extends this...
Book
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Waarom een atlas leuke vliegen? Sommige vliegen trekken de aandacht door hun fraaie uiterlijk of opvallende gedrag. Zweefvliegen zijn daarvan een goed voorbeeld, maar er zijn nog enkele andere families die daaraan voldoen. Wij hebben daarvoor de term ‘Leuke vliegen’ geïntroduceerd. In navolging van de zweefvliegenatlas (Reemer et al. 2009) hebben w...
Article
The first records of Peleteria iavana (= varia preocc.) for Belgium (2017) and the Netherlands (2018) are described. The species has spread very rapidly over the western half of Belgium (fig. ) and is expected to do so in the Netherlands as well. Cylindromyia bicolor and Brullaea ocypteroidea have further established populations in the Netherlands...
Article
The first record of Anthidium septempinosum from the Netherlands is presented. One female was caught at an industrial site in Ede amongst Anthidium manicatum. Characteristics of this species are given, including a simplified field key to the Anthidiini of the Netherlands. Whether A. septemspinosum reached the Netherlands by its own or was transport...
Article
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The black soldier fly Hermetia illucens has its origin in the tropical parts of America, most probably South-America. It is a very adaptable, saprophagous species, the larvae living as a scavenger in decaying organic matter of both plant and animal origin. The ease with which the larvae can be bred, makes it interesting for commercial use. At first...
Conference Paper
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The kingdom of Bhutan is a small, landlocked country in the eastern part of the Himalayas. It is bordered by Tibet in the north, the Indian states of Sikkim in the west, Arunachal Pradesh in the east and by Assam and West Bengal in the south. The landscape ranges from lush subtropical planes in the south to the subalpine Himalayan mountains in the...
Article
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Recently, reports of insect declines prompted concerns with respect to the state of insects at a global level. Here, we present the results of longer‐term insect monitoring from two locations in the Netherlands: nature development area De Kaaistoep and nature reserves near Wijster. Based on data from insects attracted to light in De Kaaistoep, macr...
Article
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Recent studies have shown a worrying decline in the quantity and diversity of insects at a number of locations in Europe (Hallmann et al. 2017) and elsewhere (Lister and Garcia 2018). Although the downward trend that these studies show is clear, they are limited to certain insect groups and geographical locations. Most available studies (see overvi...
Article
The hoverfly Trichopsomyia ochrozona (Stackelberg, 1952) (Diptera: Syrphidae) is recorded for the first time from Iran. An illustrated key to the West Palaearctic species of Trichopsomyia is presented. Illustrations of the puparium of Trichopsomyia joratensis Goeldin, 1997 and the larva and puparium of T. ochrozona are given and their larval and ad...
Article
Based on a re-examination of the type, H. solstitialis is found to be identical with the species currently known as H. ciureai syn. nov. Since the 1950s the name H. solstitalis has been misinterpreted in European literature. This concept, introduced by Lyneborg, is shown to be a light coloured variety of H. bimaculata.
Article
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An updated checklist is provided for the Tachinidae (Diptera) of mainland Portugal. The current count of the tachinid species of Portugal is 282; 127 of them are recorded for the first time from this country. Additional information is given for each record, thus expanding the existing knowledge of the recorded species.
Article
An annotated checklist of 186 species of Tachinidae (Diptera) of the Russian province Khabarovskii krai is provided. In total, 56 species of Tachinidae are recorded for the first time for Khabarovskii krai, 13 species are new for the Russian Far East and 4 species are firstly recorded for for Russia. Panzeria linguacercus sp. n. and Smidtia atribas...
Chapter
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Up until now, only one species of Chrysosomopsis Townsend, 1916, was known from the western Palaearctic Region: the type species C. aurata (Fallén, 1820). A second species, C. macrocercus sp. nov., is described from Austria, northern Italy, eastern Switzerland, and the Altai mountains in Siberia. The locus typicus is the Tartscher Valley south of t...
Article
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The first comprehensive Kenyan hippoboscid checklist is presented. All reliable and available data of louse flies (Diptera: Hippoboscidae) from Kenya are summarised. First records of two species of louse flies from Kenya are given: Icosta (Icosta) mecorrhina Maa, 1964 and Ornithomya marginalis Maa, 1964. A louse fly collected from Narina's Trogon A...
Article
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De familie der sluipvliegen is één van de soortenrijkste vliegenfamilies in ons land. De larven ontwikkelen zich inwendig in ongewervelden, veelal vlinderrupsen. De groep is in ons land relatief goed bestudeerd en de afgelopen jaren zijn diverse aanvullingen op de checklist uit 2002 gepubliceerd. In dit artikel worden wederom twee soorten voor het...
Article
Many studies have found bicycle-motor vehicle crashes to be more likely on bidirectional cycle paths than on unidirectional cycle paths because drivers do not expect cyclists riding at the right side of the road. In this paper we discuss the hypothesis that opening all unidirectional cycle paths for cycle traffic in both directions prevent this lac...
Article
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An annotated list of the 236 hoverflies species belonging to 61 genera which have been found in the basin of the Tumnin River (Khabarovskii krai) is given. Paragus albifrons (Fallén, 1817) and Cheilosia rufimana Becker, 1894 are recorded for the first time from the Russian Far East. One new synonym is proposed: Pipiza quadrimaculata (Panzer, 1804)...
Research
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The horseflies (Diptera: Tabanidae) of Madagascar - Part 1: Introduction, subfamily Pangoniinae and tribe Chrysopsini (Chrysopsinae).
Conference Paper
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Samenvatting De afgelopen 25 jaar is de werkzaamheid van de fietshelm tegen het krijgen van hoofdletsel onderbouwd met case-controlstudies. Tijdreeksanalyse vinden evenwel geen positief effect. Een methodologisch probleem met de case-control studies is dat ook de control gekozen wordt onder slachtoffers van de eerste hulp. Dit artikel laat analytis...
Data
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Conference Paper
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The risk of getting a head injury per kilometre wearing a helmet relative to the same risk without helmet is the most appropriate measure to assess the effectiveness of the bicycle helmet. Due to lack of data on exposure rates, odds ratios of helmeted versus unhelmeted cyclists for head injury and other injuries on hospitalized victims are broadly...
Article
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A b s t r a c t : In the present study, both genus Blepharella MACQUART 1851 and species Blepharella setigena (CORTI 1895) are recorded for the first time from Iran. This is also the first report of the genus Blepharella from western Palearctic region. Additionally, distributional data as well as short taxonomic comments are given. K e y w o r d s...
Article
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Fauna Europaea provides a public web-service with an index of scientific names (including important synonyms) of all extant multicellular European terrestrial and freshwater animals and their geographical distribution at the level of countries and major islands (east of the Urals and excluding the Caucasus region). The Fauna Europaea project compri...
Data
Vera Andreevna Richter short obituary
Data
Fauna Europaea Guidelines for Group Coordinators and Taxonomic Specialists
Article
This paper deals with the Tachinidae reared from Ropalidia nests collected on Madagascar. The material belongs to two genera, Anacamptomyia and Parapales, each represented by two species. Both species of Anacamptomyia are described as new: A. aurifrons sp. n. and A. blommersi sp. n. Their relation to the species from the Afrotropical mainland is di...
Article
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A checklist of the ‘lower Brachycera’ of Finland is presented. This part of the complete checklist of Finnish Diptera covers the families Acroceridae, Asilidae, Athericidae, Bombyliidae, Mythicomyiidae, Rhagioni- dae, Scenopinidae, Stratiomyidae, Tabanidae, Therevidae, Xylomyidae and Xylophagidae.
Article
The semiargenteus-subgroup of the Tabanus bovinus species group is reviewed. The known distribution area of the three previously known species could be significantly increased. T. semiargenteus Olsufjev, 1937 was for the first time recorded from Syria and Iran, T. olsufjevi Hauser, 1960 from Iraq and Iran and T. sarbazensisJežek, 1990 from Lebanon,...
Article
Lydella (Lydelloxenis) slavonica sp. n. is described from Montenegro and Poland. The definition of the subgenus Lydelloxenis Mesnil, 1956 is discussed. A key to western Palaearctic subgenera of Lydella Robineau-Desvoidy, 1830 and species of Lydelloxenis is provided. A phylogenetic analysis for the genus Lydella is provided. The species from the tro...
Article
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Resumen: Dos especies de tabánidos se registran por primera vez de la Península Ibérica: Atylotus plebeius (Fallén, 1817) y Haematopota scutellata (Olsufjev, Moucha & Chvála, 1964). Ambas especies se han encontrado en los últimos años en el Piri-neo catalán, donde alcanzan el límite meridional de su distribución. Atylotus plebeius también se regist...
Article
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Pangonius theodori a new horse fly species (Diptera: Tabanidae: Pangoniinae) from northern Israel and southern Lebanon is described. The zoogeography, habitat preference and taxonomic position within the genus of the new species is discussed in detail.
Article
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Larvae of the sheep botfly (Oestrus ovis) normally have sheep or goats as host. In humans the larvae can survive for a short time in the nose or under the eyelids, after which they die or are sneezed out. We describe a 47-year-old woman who during a stay in the Cape Verde Islands developed symptoms of sneezing, a swollen face and an itchy feeling i...
Article
Knowledge of the horse fly fauna (Diptera: Tabanidae) of Lebanon is fragmentary, while the local fauna of most neighboring countries has been fairly well researched. Within the framework of the 20-year project "The ecology and zoogeography of the Lepidoptera of the Near East," we regularly collected biting flies in the whole region, including Leban...
Article
During a 20-year survey we routinely collected Tabanidae in the Sinai resulting in a checklist of 22 species. We recorded 2 species for the Levant (Tabanus mordax Austen, 1911 and Tabanus gratus Loew, 1858), 4 species for Egypt (Nemorius irritans (Ricardo, 1901), Chrysops flavipes Meigen, 1804, Haematopota coronata Austen, 1908 and Haematopota pall...
Article
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In memory Bob van Aartsen (15 May 1920 – 1 July 2007) On the 1st of July Bob van Aartsen passed away after a brief illness. He is one of the most remarkable entomologists in the Netherlands. His great virtue lies in the collection of Dutch insects, especially Diptera. He has always taken the opportunity to collect in nearly every corner of the coun...
Article
A first account of the Tachinidae (Diptera) of Yemen is provided, primarily based on specimens collected in recent years. In total, 83 species belonging to 62 genera are recorded, of which 16 species and two genera (Minthosoma n. gen. and Stylocarcelia n. gen.) are described as new to science. Keys to species are provided for all genera represented...
Article
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Review of the genus Psilota in the Netherlands (Diptera: Syrphidae) A review of the genus Psilota in the Netherlands is presented. It is demonstrated that the genus is represented by a complex of two species, Psilota anthracina Meigen, 1822 and P. atra (Fallén, 1817), as already indicated by Kassebeer. Both species can be separated using the key pr...
Article
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Summary Checklists are given for the Tachinidae and Oestridae of the Madeira archipelago. They are based on three different insect collections at Madeira, a field study and a review of the litera- ture. The species Siphona maderensis sp. n. is described here. Four species are recorded for the first time for Madeira: Chaetogena acuminata Rondani, Dr...
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Article
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A new horsefly for the Netherlands: Hybomitra arpadi (Diptera: Tabanidae) The horsefly Hybomitra arpadi (Diptera: Tabanidae) is recorded for the first time from the Netherlands. New features for the recognition of the males and some notes on the biology are given.
Chapter
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Presents a short diagnosis of the adults, pupae and larvae of the Diptera family Tabanidae with a checklist for The Dutch fauna.
Article
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Of all dutch insects, approximately 2.7 % occur predominantly in the coastal dune area. Of these, 1.3 % is totally restricted to the dune area. The dune area has recently gained in importance to to decline of populations inlands, especially for species typical of grasslands. Hence, the dune area functions as a kind of refugium.
Conference Paper
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In a theoretical study, the interaction is investigated between parasitoids (tachinid flies) with microtype eggs and their hosts. In case of a plague of the host, it is shown that, paradoxically, the presence of such parasitoids lengthens the duration of the plague, sometimes even quite dramatically.
Book
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This book (in Dutch) is divided into two parts:in part 1 (written by Theo Zeegers) a key to species of the adult stages is presented with ecological, biological and distributional notes; in part 2 (written by Ton van Haaren) a key to species of the larval stages is presented. This book deals with all species occuring in The Netherlands and Belgium...
Article
The rearing of the botfly Cephenemyia auribarbis (Diptera: Oestridae) After several failures we finally succeeded in rearing botflies Cephenemyia from third-instar larvae. From a red deer shot at 13 March 1998 about one hundred larvae of Cephenemyia auribarbis (Meigen, 1824) were collected. Ten individuals reached the pupal stage. After 22 days, on...
Article
The author investigates the existence of an infinite period-doubling sequence in the following class of semi-symplectic maps: a two-dimensional (2D) nonlinear constant Jacobian map with an infinite period-doubling sequence, linearly and weakly coupled with a 2D linear map. The author introduces the property of semi-symplecticity as the generalizati...
Article
Er zijn sterke aanwijzingen dat het plaatsen van bijenkasten in natuurgebieden negatief kan zijn voor de plaatselijke wilde-bijenfauna. De honingbij concurreert met wilde bijen om stuifmeel, waardoor de broedzorg van sommige soorten nadeel ondervindt. Dit was voor Natuurmonumenten de aanleiding om EIS-Nederland te verzoeken een rapport op te stelle...
Article
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Faunistic review of the Dutch woodlouse-flies (Diptera: Rhinophoridae) The faunistics of the seven Dutch species of Rhinophoridae are discussed. Of each species a short diagnosis , its distribution in the Netherlands, habitat and phenology are given. The larvae of all Rhinophoridae are endoparasites on woodlice (Isopoda: Oniscidae). In a separate p...
Article
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The hoverfly Eristalis picea attained three periods of abundance this century, around 1950, 1970, and 1990. During the first two periods, this hoverfly was found mainly around the Naardermeer, Baarn, and in Zuid-Limburg. During the last period, it has been found in most southern and eastern parts of The Netherlands. The cause of the abundance perio...
Article
The two monophagous species Carcelia illiaca and Pales processioneae are common parasitoids in processionary moth caterpillars, whereas the two more polyphagous species Zenillia libatrix and Bondelia nigripes are reared in smaller numbers from the caterpillars. Carcelia iliaca reproduces slowly and has only one generation each year, whereas P. proc...
Article
We investigate the possibility of period doubling transition to temporal chaos of a coherent structure in a finite dimensional Hamiltonian system with moderately small friction. A solitary wave in a periodically driven chain of particles provides a typical example. To this end the equations of motion are transformed to those of one driven dominant...
Book
This book provides an introduction to the terrestrial invertebrates of the Netherlands. The first part consists of a key to the various invertebrate families, using only characters visible at 10× magnification. The 2nd part gives an introduction to the ecology of invertebrates. Taxonomic and ecological indexes and a random number table are included...
Article
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Some additions to the checklist of Belgian tachinids (Diptera: Tachinidae) 34 species are added to the list of Belgian Tachinidae. Euexorista obumbrata is mentioned here for the first time from West Europe. The holotype of this species is discussed. Résumé. Quelques additions à la liste des tachinidae belges (Diptera: Tachinidae) 34 espèces furent...

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Projects (9)
Project
Tachinidae of Palaearctic Region Rhinophoridae of Palaearctic Region Hippoboscidae Oestridae
Project
Tabanidae of Palaearctic Region Review of the Tabanidae of Madagascar Rhagionidae of Europe