Jan Růžička

Jan Růžička
Czech University of Life Sciences Prague | CULS · Department of Ecology

PhD

About

137
Publications
25,838
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Citations
Introduction
Jan Růžička currently works at the Department of Ecology, Faculty of Environmental Sciences, Czech University of Life Sciences Prague. Jan does research in taxonomy, distribution and ecology of Coleoptera: Silphidae, Leiodidae and Agyrtidae. He is also interested in morphology of preimaginal stages of these beetles, and in its application in forensic entomology.
Additional affiliations
July 1991 - present
Czech University of Life Sciences Prague
Position
  • Researcher

Publications

Publications (137)
Article
Full-text available
A taxonomic revision of the subgenus Chrysosilpha Portevin, 1921 (of the genus Necrophila Kirby&Spence, 1828) is presented. Three valid species are recognized: (1) N. (C.) formosa (Laporte, 1832), comb. nov. (ex Silpha Linnaeus, 1758), widely distributed from Laos and Vietnam through the Malay Peninsula, to Sumatra and Bali, with Silpha chloroptera...
Article
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Five species of the Catops fuscus species group are reported from China. Three species are newly described: C. hlisnikovskyi n. sp. from the Beijing municipality and Jiangsu province, C. schuelkei n. sp. from Sichuan and Yunnan provinces, and C. smetanai n. sp. from Sichuan and Yunnan provinces. Female of C. sasajii Nishikawa 2007 is described and...
Article
Full-text available
When the bodies of small vertebrates start to decay shortly after death, a number of organosulfur compounds are produced, including methanethiol, dimethylsulfide (DMS), dimethyldisulfide (DMDS), dimethyltrisulfide (DMTS), and S-methyl thioacetate. These molecules appear to attract various necrophagous animals. We tested the roles of DMS, DMDS, and...
Article
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A new species, Apteroloma zhejiangensesp. n., is described from Zhejiang Province, China. The habitus and sexual characters of the new species are illustrated. Apteroloma jinfo Růžička, is reported for the first time from China: Hubei and Hunan Provinces, and Apteroloma potanini (Semenov, 1893) from Ningxia and Henan Provinces. Presence of Apterolo...
Article
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Chemical composition of volatiles emitted from fresh mouse carcasses (laboratory mice, Mus musculus) was studied using solid sample injection technique (solid-phase micro-extraction), two-dimensional gas chromatography with time of flight mass spectrometric detection and gas chromatography with electroantennographic detection. Electroantennography...
Article
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Coleoptera are currently considered a fundamental tool to help solve criminal investigations, allowing forensic entomologists to estimate post-mortem intervals and obtain other ecology-related information. Thanatophilus rugosus (Linnaeus, 1758) is an important necrophagous beetle distributed through most of the Palaearctic region, where it is readi...
Article
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Providing clear and detailed morphological descriptions of endemic species in limited areas enables new knowledge of their biology and ecology to be obtained through citizen science. This information can be further used for their protection. Our study presents the first morphological description of the larvae of all three instars of Heterotemna ten...
Article
Carrion beetles of genus Thanatophilus (Leach, 1815) are an important group of necrophagous insects, with great potential for forensic entomology in temperate zones of Africa, America, Asia, and Europe. Developmental models for majority of Thanatophilus species remain unknown. In this study, we will provide new thermal summation models for all the...
Article
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A new species, Oiceoptoma tangi Sommer, Růžička, Nishikawa & Schneider, new species, from Zhejiang Province, China, is described and illustrated. The new species is closely related to O. subrufum (Lewis, 1888), distributed in Central and North-eastern China, the Korean Peninsula, Far East of Russia and Japan, and to O. nigropunctatum (Lewis, 1888),...
Article
The postmortem interval (PMI) estimation, in cases where the body was discovered in an advanced stage of decomposition, is predominantly based on entomological evidence. However, very few forensically important species are sufficiently known in detail to allow a practical application. One of them is the carrion beetle, Necrophila (Calosilpha) brunn...
Article
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Necrophagous beetles of genus Thanatophilus are well recognized as a group of beetles with a high potential utility in forensic entomology. They can be used to estimate postmortem interval (PMI) or validate the value for other groups of insects commonly encountered on human remains, like blowflies (Calliphoridae). However, reliable tools for instar...
Conference Paper
Carrion beetles are an important part of the decomposition processes in the Northern Hemisphere ecosystems. Along with the flies, they are the main consumers of dead animal tissues, thus driving the nutrients from the carcass to other parts of the ecosystem. These animals can also be used as bio indicators in forensic entomology, where they help to...
Article
Full-text available
Determination of insect species and their instars, occurring on human remains, is important information that allows us to use insects for estimation of postmortem interval and detect possible manipulation with the body. However, larvae of many common species can be identified only by molecular methods, which is not always possible. The instar deter...
Article
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Ptomaphaginus troglodytes sp. n. , the first anophthalmic species of Ptomaphaginus Portevin, 1914 is described from two close caves in Libo Karst, south Guizhou Province, China.
Article
Ptomaphaginustroglodytessp. n. , the first anophthalmic species of Ptomaphaginus Portevin, 1914 is described from two close caves in Libo Karst, south Guizhou Province, China.
Article
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The species belonging to the genus Ptomaphagus Hellwig, 1795 (Coleoptera, Leiodidae, Cholevinae, Ptomaphagini) from eastern Asia are assigned to three species groups. Group yasutoshii has a single species: P. (s. str.) yasutoshii Nishikawa, 1993 from Taiwan, China. Group nepalensis with three species: P. (s. str.) nepalensis Perreau, 1988 from Nepa...
Article
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Omoglymmius (s. str.) wukong sp. n. (Coleoptera: Rhysodidae: Omoglymmiini) is described from Xizang, China. Relevant morphological characters of the new species are illustrated with colour plates, and known distribution of the subgenus Omoglymmius in the Himalayan region is mapped.
Article
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Distributional data on Cholevinae found in caves in Iran are presented. In total, three species are reported. Anemadus sengleti Giachino & Vailati, 1993 is redescribed, including previously unknown female characters, based on material from two localities in Iran, with the first records from Isfahan, and Kohgiluyeh and Boyer-Ahmad Provinces. Catops...
Article
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Sinobathyscia tianma sp. nov. (Coleoptera: Leiodidae: Cholevinae: Leptodirini) is described from Shanghai, China. The genus Sinobathyscia is redescribed with respect to the discovery of the male. Relevant morphological characters of the species examined are illustrated with colour plates, and their known distributions are mapped.
Conference Paper
Carrion beetles of genus Thantophilus are an important part of the North Hemisphere ecosystems. They provide valuable ecosystem services by promoting nutrient cycling and biological control of pests. They also regularly occurs on human remains and some of them are established forensic bio-indicators as they could provide valuable information regard...
Article
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The “Anemadus smetanai ” species group (Coleoptera: Leiodidae: Cholevinae: Anemadini) is revised. The species group is redefined, including Anemadus smetanai Růžička, 1999, A. kabaki Perreau, 2009 from China: Sichuan province and five new species: A. grebennikovi sp.n. (Yunnan province: Jizu Shan Mts.), A. haba sp.n. (Yunnan province: Haba Xue Shan...
Article
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Cholevinus pallidus rufus (Kraatz, 1870), found in a red fox den entrance is reported for the first time from Hungary. Choleva (Choleva) lederiana pilisensis Růžička et Vávra, 2003, an endemic subspecies from Hungary, is reported from additional localities in Pilis Mts and Buda Hills. With 5 figures.
Article
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The conundrum of Ptomaphagus (s. str.) sibiricus Jeannel, 1934 (Coleoptera, Leiodidae, Cholevinae, Ptomaphagini) is solved, and it is redescribed and newly recorded in South Korea. A new species is also described from the Russian Far East: P. (s. str.) hayashii sp. n. Relevant morphological characters of the concerned species are illustrated with c...
Article
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Ptomaphagus (s. str.) chenggongi sp. n. and P. (s. str.) tingtingae sp. n. (Coleoptera, Leiodidae, Cholevinae, Ptomaphagini) are described from Taiwan Island. In addition, a new subjective synonym is proposed, P. (s. str.) yasutoshii Nishikawa, 1993 = P. (s. str.) smetanai Perreau, 1996, syn. n. Relevant morphological characters of the examined Pto...
Article
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After examining Japanese material of Ptomaphagus Hellwig from various collections, a new species is described, P. (s. str.) piccoloi sp. n., and a new subjective synonym proposed, P. (s. str.) kuntzeni Sokolowski, 1957 = P. (s. str.) amamianus Nakane, 1963, syn. n., in this paper. Relevant morphological characters of examined species of Ptomaphagus...
Article
Full-text available
A taxonomic revision of the subgenus Calosilpha Portevin, 1920 (of the genus Necrophila Kirby & Spence, 1828) through Asia is presented. Four valid species are recognized: (1) Necrophila (C.) brunnicollis (Kraatz, 1877), widely distributed from Bhutan and China: Yunnan province to Far East of Russia and Japan (including Ryukyu Islands); (2) N. (C.)...
Article
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Nargus (Eunargus) celli sp. nov. (Coleoptera: Leiodidae: Cholevinae: Cholevini) is described from Guangxi autonomous region, China. Important morphological characters of examined species of Eunargus Perreau are illustrated by color plates or line drawings. A key to three known species of the subgenus Eunargus Perreau is compiled, and known distribu...
Article
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Carrion beetles (Coleoptera: Silphidae) provide a valuable ecosystem service by promoting nutrient cycling and controlling pests like noxious flies (Diptera: Calliphoridae and Sarcophagidae). Our main goal was to examine the relationship between the occurrence of carrion beetles and soil type. We used pitfall traps to collect 43,856 specimens of 15...
Article
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The distribution of Apteroloma anglorossicum (Semenov, 1890), A. harmandi (Portevin, 1903) and A. sillemi Jeannel, 1935 in central Asia and along the Himalayas is summarized, and the collecting circumstances and ecology of all three species from Gilgit District, Pakistan are described in detail. Revised diagnoses of all three species are provided,...
Article
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The genus Ablattaria Reitter, 1884 (Coleoptera: Silphidae: Silphinae) is revised. Four taxa are recognized as valid species: Ablattaria arenaria (Kraatz, 1876), A. cribrata (Ménétries, 1832), A. laevigata (Fabricius, 1775) and A. subtriangula Reitter, 1905. Ablattaria laevigata var. meridionalis Ganglbauer, 1899 is newly treated as a junior subject...
Article
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Beetles of the family Silphidae are an important but imperfectly understood part of Palaearctic ecosystems. Our team studied the ecology of open-landscape silphids around Louny, Kutná Hora, Zábřeh and Židlochovice in 2008 and 2009. We used 420 baited pitfall traps and, at 84 localities, we collected 71 234 specimens of 15 silphid species. Distribut...