This worldwide biosystematic study of Corethrellidae, with its single genus Corethrella Coquillett, provides a complete compilation of all that is known for the group, both taxonomically and bionomically. Descriptions of each species are based primarily on the adults, summarize all bionomic information, and provide a map showing its distribution. Keys to the species of each region are provided. A total of 97 extant species is recognized, with 52 of these being new. Seven fossil species are described with two of these being new to science. All species, including 13 new synonyms, are cataloged in a table for easy reference. Seven extant species are of uncertain status because of damaged or missing types. Lectotypes and, depending on the species, some paralectotypes, are designated for the following species: C. inepta (Annandale), C. pallitarsis Edwards, C. picticollis Edwards, C. ananacola Dyar, C. calathicola Edwards, and C. brakeleyi (Coquillett). A cladistic analysis interprets most extant and fossil species (some are not interpretable at the present time) and provides the basis for zoogeographic and bionomic interpretation. Worldwide, Corethrella species are found between 50°N and 50°S but most are found between 30°N and 30°S and below 1500 meters in elevation. Because female adults are attracted to the call of male frogs and feed on their blood, species are restricted to areas where there are frogs. Phylogenetic patterns suggest Gondwanan connections for earlier lineages within the genus. At least one lineage has dispersed from the New World to southeast Asia and some species are located on volcanic islands in the Caribbean, indicating further instances of dispersal. It is certain that many more species are yet to be discovered. Phylogenetic patterns indicate that the immatures of Corethrella species have repeatedly moved between ground-dwelling habitats and phytotelmata, with the plesiotypic habitat likely being ground-dwelling. Some lineages have diversified within phytotelmata. Fossil, cladistic and morphological evidence indicates that Corethrella females have been feeding on calling frogs since at least the Early Cretaceous. Females likely hear their frog hosts using the Johnston’s Organ. There is some evidence of host specificity as well as selection of particular biting sites for some species of Corethrella. The females of at least some species of Corethrella transmit Trypanosoma Gruby between calling frogs and this association is also likely an ancient one.Este estudio biosistemático de Corethrellidae a nivel Mundial, con su único género Corethrella, proporciona una completa recopilación de todo lo conocido para el grupo, tanto desde el punto de vista taxonómico como bionómico. Las descripciones de cada especie se realizan primariamente sobre la base de adultos, resumen toda la información bionómica y proveen un mapa donde se muestra su distribución. Se brindan claves para especie de cada región. Se reconoce un total de 97 especies, 52 de las cuales son nuevas. Se describen siete especies fósiles, siendo dos de ellas nuevas para la Ciencia. Para una fácil referencia, todas las especies son catalogadas en una tabla, incluyendo 13 nuevos sinónimos. Debido a que sus tipos se hallan dañados o perdidos, siete especies actuales ostentan un status incierto. De acuerdo a la especie, son designados lectotipos o paralectotipos de las siguientes especies: C. inepta (Annandale), C. pallitarsis Edwards, C. picticollis Edwards, C. ananacola Dyar, C. calathicola Edwards, y C. brakeleyi (Coquillett). El análisis cladístico interpreta la mayoría de las especies actuales y fósiles (algunas no pueden ser interpretadas actualmente) y provee la base para interpretaciones zoogeográficas y bionómicas. Las especies de Corethrella se hallan entre 50°N y 50°S, aunque la mayoría se encuentran entre 30°N y 30°S y por debajo de 1500 metros de elevación. Debido a que las hembras adultas son atraídas por el llamado de ranas macho y se alimentan de su sangre, las especies están restringidas a las áreas donde se hallan ranas. Los patrones filogenéticos sugieren conecciones Gondwánicas para los linajes más antiguos del género. Al menos un linaje se ha dispersado desde el Nuevo Mundo hacia el sudeste de Asia, y algunas especies se hallan en islas volcánicas del Caribe, indicando otras instancias de dispersión. Con seguridad aún quedan muchas más especies por ser descubiertas. Los patrones filogenéticos indican que los inmaduros de las especies de Corethrella se han movido repetidamente entre habitats ubicados a nivel del suelo y fitotelmata, siendo probablemente

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This catalog of the biting midges (Diptera: Ceratopogonidae) of the New World north of Mexico includes 603 species and 39 genera. The full citation, province or state of the type locality and distribution by province and/or state of each species is given. The most recent revision for each genus, subgenus and species group is cited.

Distribution and habitat preferences of species of Chaoboridae in the Holarctic Region are described. Coexistence of larvae of different Chaoborus species in various water bodies reflects differences in geographical distribution, habitat preference, and phyletic relationships. Extant sister species with similar habitat preferences are allopatric whereas those with differences may be sympatric. This suggests that the development of ecological divergence must historically precede coexistence of the immatures of species. Species which coexist often differ markedly morphologically and are not immediately related phylogenetically.Corethrella and Chaoborus (Sayomyia) species that occur in the Holarctic Region and Chaoborus pallidus may have southern, tropical phyletic affinities. Distributions of some North American chaoborids suggest the presence of ecological barriers in northwestern U.S.A. that prevent southern extensions of the ranges of boreal species.