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      Water scavenger beetles in rotten cacti: a review of Agna with the description of a new species from Mexico (Coleoptera: Hydrophilidae: Sphaeridiinae) Translated title: Escarabajos hidrofílidos en cactus podridos: una revisión de Agna con la descripción de una especie nueva de México (Coleoptera: Hydrophilidae: Sphaeridiinae)

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          Abstract

          Abstract The terrestrial hydrophilid genus Agna Smetana (tribe Megasternini), specialized in rotten cacti, is redescribed and illustrated. Known species are diagnosed and a new one, A. zaragozai sp. nov., is described from central Mexico (Hidalgo, Puebla, and Oaxaca) and its molecular barcode is provided. Other species of Hydrophilidae known to have been collected in cacti are listed and commented. Dactylosternum cacti (LeConte) (Coelostomatini) is recorded for the first time from Mexico and Cryptopleurum impressum Sharp (Megasternini) is recorded for the first time from the Mexican states of Jalisco and San Luis Potosí.

          Translated abstract

          Resumen Se revisa el género terrestre de Hydrophylidae Agna Smetana (tribu Megasternini), especializado en cactus podridos. El género es redescrito e ilustrado. Las especies conocidas son diagnosticadas y se describe una nueva, A. zaragozai sp. nov., de Hidalgo, Puebla y Oaxaca. Otras especies de Hydrophilidae con registros de colecta en cactus podridos son listadas y comentadas. Se registra Dactylosternum cacti (LeConte) (Coelostomatini) por primera vez para México y Cryptopleurum impressum Sharp (Megasternini) se registra por primera vez para los estados mexicanos de Jalisco y San Luis Potosí.

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          Molecular phylogeny, evolution and classification of the Hydrophilidae (Coleoptera)

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            The hydrophiloid beetles: phylogeny, classification and a revision of the genera (Coleoptera, Hydrophiloidea)

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              REVISION OF THE SUBFAMILY SPHAERIDIINAE OF AMERICA NORTH OF MEXICO (COLEOPTERA: HYDROPHILIDAE)

              A. Smetana (1978)
              A revision of the hydrophilid subfamily Sphaeridiinae (Coleoptera) is presented including a historical review, a discussion of diagnostic characters and techniques, and some conclusive remarks, mostly on the zoogeography of this group in North America.Thirteen genera and 62 species are recognized. Three genera, one subgenus, 12 species, and one subspecies are described as new. Sphaeridiolinus Menozzi, 1921, is placed in synonymy with Sphaeridium Fabricius, 1775; Ercycon Rey, 1885, and Paraliocercyon Ganglbauer, 1904, are placed in synonymy with Cercyon Leach, 1817. On the specific level, Phaenonotum dubium Sharp, 1882, is placed in synonymy with Ph . exstriatum (Say, 1837); Sphaeridium quadrimaculatum Herbst, 1783, marginatum Fabricius, 1787, daltoni Stephens, 1829, semistriatum Laporte, 1840, testaceum Heer, 1841, humerale Westhoff, 1881, nigrum Csiki, 1953, and pulchrum Csiki, 1953, with S . bipustulatum Fabricius, 1781; Sphaeridium striolatum Heer, 1841, pictum Ménétries, 1832, marginatum Normand, 1933, nigerrimum Reitter, 1909, inhumerale Csiki, 1953, and confluens EndrÖdy-Younga, 1967, with S . scarabaeoides (Linné, 1758); Cercyon testaceus Blatchley, 1923, with C . praetextatus (Say, 1825); Cercyon fulvipennis Mannerheim, 1852, with C . limbatus Mannerheim, 1843; Cercyon mulsanti Ganglbauer, 1904, with C . quisquilius (Linné, 1761); Cercyon impunctatus Kuwert, 1890, and janssoni Nyholm, 1952, with C . unipunctatus (Linné, 1758); Cercyon incrematus Notman, 1920, with C . lateralis (Marsham, 1802); Cercyon erythropterus Mulsant, 1840, discoidalis J. Sahlberg, 1913, basillaris Notman, 1920, and bifenestratellus EndrÖdy-Younga, 1967, with C . haemorrhoidalis (Fabricius, 1775); Cercyon rufipennis Csiki, 1953, with C . impressus (Sturm, 1807); Cercyon rubripennis Kuwert, 1890, with C . melanocephalus (Linné, 1758); Cercyon separandus Rey, 1885, and pictithorax Gridelli, 1926, with C . terminants (Marsham, 1802); Cercyon binotatus Stephens, 1829, and ruficollis Schilsky, 1888, with C . litoralis (Gyllenhal, 1808); Cercyon falli Winters, 1944 (nomen nudum), with C . analis (Paykull, 1798); Cybocephalus unicolor Motschulsky, 1845, with Cercyon adumbratus Mannerheim, 1843; Cryptopleurum cerei Schwarz, 1899, with C . impressum Sharp, 1882.Neotypes are designated for Cercyon praetextatus (Say), C . occallatus (Say), and C . minusculus Melsh. Lectotypes are designated for Dactylosternum advectum Horn, D . cacti (LeC.), Oosternum costatum Sharp, Cercyon roseni Knisch, C . opacellus Fall, C . pubescens LeC., C . kulzeri Knisch, C . nevadanus Knisch, C . floridanus Horn, C . testaceus Blatch., C . limbatus Mannh., C . fulvipennis Mannh., C . variegatus Sharp, C . indistinctus Horn, C . adumbratus Mannh., C . fimbriatus Mannh., C . luniger Mannh., C . maculatus Melsh., Genyon navicularis (Zimm.), Megasternum posticatum Mannh., Cryptopleurum impressum Sharp, C . cerei Schw., and C . subtile Sharp.Keys to tribes, genera, and species are provided. The tribes and genera are described; each species is described and illustrated, and all available bionomic and distributional data are presented; distributional records are mapped.
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                Author and article information

                Journal
                rmbiodiv
                Revista mexicana de biodiversidad
                Rev. Mex. Biodiv.
                Instituto de Biología (México, DF, Mexico )
                1870-3453
                2007-8706
                2019
                : 90
                : e902856
                Affiliations
                [2] Praha orgnameNational Museum orgdiv1Department of Entomology Czech Republic
                [3] Zapopan Jalisco orgname Mexico
                [1] orgnameCharles University orgdiv1Faculty of Science orgdiv2Department of Zoology Czech Republic
                Article
                S1870-34532019000101224 S1870-3453(19)09000001224
                10.22201/ib.20078706e.2019.90.2856
                dd273645-8e35-4049-a46c-31eb2ab9401b

                This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

                History
                : 01 November 2018
                : 06 May 2019
                Page count
                Figures: 0, Tables: 0, Equations: 0, References: 21, Pages: 0
                Product

                SciELO Mexico

                Categories
                Taxonomy and systematics

                Saprófilo,Neotropical,Neártico,Árida,Semiárida,Hydrophiloidea,Código de barras de la vida,Saprophilous,Neartic,Arid,Semiarid,Barcode of life

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