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      Triploidy in Chinese parthenogenetic Helophorus orientalis Motschulsky, 1860, further data on parthenogenetic H. brevipalpis Bedel, 1881 and a brief discussion of parthenogenesis in Hydrophiloidea (Coleoptera)

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          Abstract

          Abstract

          The chromosomes of triploid parthenogenetic Helophorus orientalis Motschulsky, 1860 are described from material from two localities in Heilongjiang, China. 3n = 33. All the chromosomes have clear centromeric C-bands, and in the longest chromosome one replicate appears to be consistently longer than the other two. The chromosomes of additional triploid parthenogenetic H. brevipalpis Bedel, 1881, from Spain and Italy, are described. In one Italian population one of the autosomes is represented by only two replicates and another appears more evenly metacentric than in material from Spain and the other Italian locality. Parthenogenetic and bisexual specimens of H. orientalis are illustrated, along with Pleistocene fossil material. Parthenogenetic H. brevipalpis is also illustrated. Parthenogenesis in Hydrophiloidea is discussed. It appears to be rare and, in all cases has been detected by chromosomal analysis of populations in which males are unexpectedly scarce. Parthenogenesis is suspected in Helophorus aquila Angus et al., 2014, from northern Qinghai (China), which should be verified in further studies.

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          Most cited references 21

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          Pleistocene Helophorus (Coleoptera, Hydrophilidae) from Borislav and Starunia in the Western Ukraine, with a Reinterpretation of M. Lomnicki's Species, Description of a New Siberian Species, and Comparison with British Weichselian Faunas

           R. Angus (1973)
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            Phylogeny and the fossil record of the Helophoridae reveal Jurassic origin of extant hydrophiloid lineages (Coleoptera: Polyphaga)

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              Helophorus orientales (Coleoptera: Hydrophilidae), a parthenogenetic water beetle from Siberia and North America, and a British Pleistocene fossil

               R. M. Angus,  RB Angus (1970)
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                Author and article information

                Contributors
                Journal
                Comp Cytogenet
                Comp Cytogenet
                8
                urn:lsid:arphahub.com:pub:A71ED5FC-60ED-5DA3-AC8E-F6D2BB5B3573
                urn:lsid:zoobank.org:pub:C8FA3ADA-5585-4F26-9215-A520EE683979
                Comparative Cytogenetics
                Pensoft Publishers
                1993-0771
                1993-078X
                2020
                13 January 2020
                : 14
                : 1
                : 1-10
                Affiliations
                [1 ] Institute of Entomology, School of Life Sciences, Sun Yat-sen University, Guangzhou, 510275, Guangdong, China Sun Yat-sen University Guangdong China
                [2 ] Department of Life Sciences (Insects), The Natural History Museum, Cromwell Road, London SW7 5BD, UK The Natural History Museum London United Kingdom
                Author notes
                Corresponding author: Robert B. Angus ( r.angus@ 123456rhul.ac.uk ); Fenglong Jia ( fenglongjia@ 123456aliyun.com , lssjfl@ 123456mail.sysu.edu.cn )

                Academic editor: C. Nokkala

                Article
                47656
                10.3897/CompCytogen.v14i1.47656
                6971125
                Robert B. Angus, Fenglong Jia

                This is an open access article distributed under the terms of the Creative Commons Attribution License (CC BY 4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.

                Funding
                Natural History Museum London (for research facilities)
                Categories
                Research Article
                Coleoptera
                Genetics
                Reproductive Biology
                Systematics
                Americas
                Asia

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