Taxonomy and biology of the bromeliad-inhabiting genus Lachnodacnum (Coleoptera: Hydrophilidae: Sphaeridiinae)

Clarkson Bruno, Albertoni Fabiano F., Fikáček Martin
Acta Entomologica Musei Nationalis Pragae 54(1): 157-194, 2014
Views: 1138
Abstract: The water scavenger beetle genus Lachnodacnum Orchymont, 1937 sensu Hansen (1991) is revised. The three species that had previously been placed in the genus, L. luederwaldti Orchymont, 1937 (southern Brazil), L. saundersi Orchymont, 1937 (northern Brazil) and L. urichi (Scott, 1912) (Trinidad and Tobago), are redescribed in detail and illustrated with habitus photographs, line drawings, and SEM micrographs of relevant diagnostic characters. Lachnodacnum urichi is found not to be congeneric with the remaining two species. It is transferred to the genus Phaenostoma Orchymont, 1937 (as P. urichi (Scott, 1912) comb. nov.) and the genus Psilodacnum Orchymont, 1937 previously erected for this species is removed from the synonymy with Lachnodacnum and placed to synonymy with Phaenostoma. The preimaginal stages of Lachnodacnum luederwaldti, including the egg case, all three larval instars and pupa, are described. Basic information on the biology of the species is provided based on field observations and rearing in the laboratory. The species is found to be aquatic, living in water tanks of terrestrial and epiphytic bromeliads. An updated identification key to adults of the Neotropical genera of the Coelostomatini is also provided.
Key words: Coleoptera; Hydrophilidae; Coelostomatini; Lachnodacnum; Phaenostoma; Psilodacnum; new synonymy; new combination; taxonomy; morphology; biology; immature stages; bromelicolous taxa; Atlantic forests; Brazil; Trinidad and Tobago; Neotropical Region
Papers
Chewing lice (Phthiraptera: Amblycera et Ischnocera) from wrens (Passeriformes: Troglodytidae), with description of a new species of MyrsideaA new species of Eremiothrips from Iran (Thysanoptera: Thripidae)Preimaginal stages and biology of Bactericera lyrata (Hemiptera: Psylloidea: Triozidae)Notes on the tribe Tongini, with description of a new species of the genus Orthophana from northern Vietnam (Hemiptera: Fulgoroidea: Nogodinidae)A new species of Cofana associated with grasses from India (Hemiptera: Cicadellidae: Cicadellinae)Taxonomic revision of the Neotropical genus Oiovelia (Hemiptera: Heteroptera: Veliidae)Revision of the genus Tachytatus (Heteroptera: Lygaeoidea: Rhyparochromidae)Afromenotes hirsuta, a new genus and species of Eumenotini from the Democratic Republic of the Congo (Hemiptera: Heteroptera: Dinidoridae)A revision of the genus Amblycara (Hemiptera: Heteroptera: Pentatomidae)Taxonomy and biology of the bromeliad-inhabiting genus Lachnodacnum (Coleoptera: Hydrophilidae: Sphaeridiinae)New species and subspecies  of Octavius from South Africa, with a key and additional distribution records (Coleoptera: Staphylinidae: Euaesthetinae)Batrisceniola fengtingae sp. nov., the first record of the genus in China (Coleoptera: Staphylinidae: Pselaphinae)A new Callosides species from Ecuador with uniquely built membranous mandibles (Coleoptera: Hybosoridae: Anaidinae)New data about 'nalassoid' genera from south-eastern Anatolia with description of a new species of Zophohelops (Coleoptera: Tenebrionidae)A new species of the genus Callomecyna from Taiwan (Coleoptera: Cerambycidae)Review of Imatidiini genera (Coleoptera: Chrysomelidae: Cassidinae)Taxonomy of the Cape Verde endemic weevil genus Dinas (Coleoptera: Curculionidae: Entiminae). Part I: Description of a new subgenus, and two new species from S?o Nicolau IslandBiology and morphology of immature stages of Coniocleonus nigrosuturatus (Coleoptera: Curculionidae: Lixinae)Two new species of Austrolimnophila from the Mediterranean (Diptera: Limoniidae)Cladistic analysis of Rheochlus and related genera, with description of a new species (Diptera: Chironomidae: Podonominae)A new species of Feuerborniella (Diptera: Psychodidae) from the paramo of ColombiaThe identity and family affiliation of Scelomyza hirticornis (Diptera: Opomyzidae, Anthomyzidae), with a new checklist of Afrotropical AnthomyzidaeCatalogue of the type specimens deposited in the Department of Entomology, National Museum, Prague, Czech Republic. Polyneoptera