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AbstractHere we describe a new species of Ochthebius (Cobalius) from marine rockpools of NW Sicily: O. (C.) senczuki sp. n. This species was first discovered on the basis of molecular evidence, but its taxonomic distinction has been subsequently supported by morphological characters. Ochthebius (C.) senczuki sp. n. shows a clear genetic diversity from the known related species, with an average COI p distance ranging from 5.6% to 10.7%; it exhibits only small morphological differences, mostly limited to dorsal punctation, pronotal and elytral outer edge, and (in males) to the mobile part of the median lobe of the aedeagus. The origin of O. (C.) senczuki sp. n. is estimated to lie in the Late Miocene (~9 Mya); the ancestors of this taxon probably remained isolated from populations of the related taxa of the Ochthebius (Cobalius) subinteger and O. (Cobalius) adriaticus complexes during cycles of regressive and transgressive marine phases that occurred in the SW Mediterranean during Late Miocene and Pliocene. The detailed state of the art of members of the O. (Cobalius) adriaticus complex throughout the Central and Eastern Mediterranean rocky coastal areas is also preliminarily discussed.http://zoobank.org/urn:lsid:zoobank.org:pub:CBFA5063-2FBE-488B-8497-E5DA7DCA9361

Se describen dos nuevas especies del género Ochthebius (Hydraenidae: Ochthebiinae) de la región peninsular de Araya, edo. Sucre (Nororiente de Venezuela), colectados manualmente en dos ambientes de agua salobre. Ambas especies se incluyen en el grupo bisinuatus, que reúne a las especies de Ochthebius con el margen anterior bisinuado y cuyos miembros solo se encuentran en la región Neártica, ahora representada en la región Neotropical. Se ilustran habitus, escleritos e imágenes satelitales que identifican la localidad.

Three species of beetles are recorded for Russia for the first time: Hydraena pontica Janssens, 1963 (Hydraenidae), Helophorus hilaris Sharp, 1916 (Helophoridae), Laccobius obscuratus Rottenberg, 1874 (Hydrophilidae). Two species are recorded for the first time for the North Caucasus: Haliplus sibiricus Motschulsky, 1860 (Haliplidae), Hydroporus nigellus Mannerheim, 1853 (Dytiscidae). Four species are recorded for the first time for North Ossetia and Kabardino-Balkaria: Helophorus discrepans Rey, 1885 (Helophoridae), Chaetarthria seminulum (Herbst, 1797) (Hydrophilidae), Contacyphon padi (Linnaeus, 1758) (Scirtidae), Plateumaris sericea caucasica (Zaitzev, 1930) (Chrysomelidae). Distributional data about three new species for North Ossetia are given: Helophorus faustianus Sharp, 1916 (Helophoridae), Enochrus affinis (Thunberg, 1794), Sphaeridium lunatum Fabricius, 1792 (Hydrophilidae); and five species for Kabardino-Balkaria: Agabus congener (Thunberg, 1794), Hydroporus incognitus Sharp, 1869, Hygrotus inaequalis (Fabricius, 1777) (Dytiscidae), Anacaena lutescens (Stephens, 1829) (Hydrophilidae), Contacyphon variabilis (Thunberg, 1787) (Scirtidae). General distribution of Hydroporus incognitus and H. nigellus and their association with mountain peat bog habitats in the North Caucasus, which considered herein as postglacial relict ecosystems, allows to assume that the postglacial colonization is the most likely way for these species into the Caucasus region.

Se amplía el conocimiento del área de distribución de 3 especies de Limnebius Leach y 9 especies de Ochthebius Leach de los subgéneros Asiobates Thomson y Ochthebius Leach en la Península Ibérica. Entre estas citas destacan las capturas en las provincias de Cuenca y Soria de Ochthebius (Asiobates) bicolon Germar, 1824 que suponen el primer registro ibérico de la especie y de Ochthebius (Asiobates) figueroi Garrido, 1990 en la provincia de Cuenca. Igualmente se confirma la presencia en la Península Ibérica de Ochthebius (Ochthebius) pusillus Stephens, 1835.

Se entrega para los coleópteros acuáticos, una reseña acerca de la diversidad y riqueza de familias, géneros y especies de los subórdenes Hydradephaga y Polyphaga, presentes en Chile. Hydradephaga está representado por las familias Dytiscidae, Gyrinidae y Haliplidae. Polyphaga por Hydrophilidae, Hydraenidae, Elmidae y Psephenidae. A excepción de Lancetes, que es el género más diversificado con 14 especies, la mayoría de los taxa de ambos subórdenes son monoespecíficos. En relación a aspectos biogeográficos, Chile no presenta familias endémicas. Sin embargo, se han descrito situaciones de endemismo de algunas especies para el Archipiélago de Juan Fernández (Lancetes backstroni, Anisomeria bistriata), e Isla de Pascua (Bidessus skottsbergi). En el continente existen elementos de origen tropical y australiano, como es el caso de Tropisternus y Austrolimnius de distribución neotropical, y Lancetes relacionado con fauna de Australia, Nueva Zelanda y Tasmania. En el trabajo se entrega además aspectos ecológicos de las familias y su potencial como bioindicadores.For water beetles of Hydradephaga and Polyphaga suborders, the diversity of family, genera and species richness present in Chile is analyzed. Hydradephaga its represented by Dytiscidae, Gyrinidae and Haliplidae families and the Polyphaga by Hydrophilidae, Hydraenidae, Elmidae and Psephenidae. Exceptionally, Lancetes is the genus most diversified with 14 species. The most of taxa of both suborders are monospecific. In relation to biogeographic aspects, Chile does not present endemic families. Nevertheless endemism situation to species level has been described for the Archipiélago de Juan Fernández (Lancetes backstroni, Anisomeria bistriata), and Isla de Pascua (Bidessus skottsbergi). In the continent, elements of tropical and Australian origin exist; as it is the case of Tropisternus and Austrolimnius of neotropical distribution and Lancetes with Australian, New Zealand and Tasmania relations. In this work, ecological aspects of the families and their use as bioindicators are given.

The three larval instars of Gymnochthebius jensenhaarupi (Knisch, 1924) are described and illustrated, including a detailed analysis of their chaetotaxy and porotaxy. The specimens used in this study were collected with adults of G. jensenhaarupi and have been identified as such by association. Comparative notes on the morphology of these larvae with other species of the subfamily Ochthebiinae are given. A hypothesis of phylogenetic relationships between G. jensenhaarupi and other members of Ochthebiinae with thoroughly described larvae is presented. The monophyly of Ochthebiinae is supported by additional larval features. On the other hand Ochthebius, as currently composed, seems to by paraphyletic. Gymnochthebius Orchymont, 1943 is confirmed as the sister group of Aulacochthebius Kuwert, 1887.

Se describe la morfología y quetotaxia de los tres estadios larvarios de Ochthebius (Cobalius) subinteger Mulsant & Rey, 1861. El estudio quetotáxico ofrece numerosos caracteres en la cápsula y apéndices cefálicos, tórax y abdomen que pueden ser empleados para identificar correctamente las larvas de esta especie. Un importante número de rasgos larvarios separan a esta especie del modelo morfológico presente en otras del género Ochthebius. La ausencia en Ochthebius subinteger de la seda cefálica temporal T2 es, por el momento, un carácter único entre las larvas de la familia Hydraenidae. Diversos caracteres relacionan la larva de esta especie con las larvas del género Calobius.