Unraveling Ocyptamus and the Baccha legacy (Diptera: Syrphidae): redefinition of groups and new species descriptions

Abstract

The systematics of Ocyptamus sensu lato has been reviewed, its species groups redefined, and some taxa resurrected. These and other related taxa are diagnosed to aid in distinguishing between them. The status of the following genera is revised: Calostigma Shannon stat. rev., Hermesomyia Vockeroth stat. rev., Hybobathus Enderlein stat. rev., Mimocalla Hull stat. rev., Orphnabaccha Hull stat. rev., Pipunculosyrphus Hull stat. rev., Pseudoscaeva Vockeroth stat. rev., and Styxia Hull stat. rev. New species of the Neotropical genus Ocyptamus are described from Costa Rica and Venezuela: Ocyptamus maximus Thompson sp. nov., Ocyptamus myiophagus Thompson sp. nov., and Ocyptamus megafemur Thompson sp. nov. In addition, an identification key for the genera and species groups of Ocyptamus sensu lato is provided, as well as a redescription of Syrphus sargoides Macquart.Lectotypes are designated for Doros disjuncta Sack, Baccha placiva Williston, Baccha pulla Sack, Ocyptamus funebris Macquart, Syrphus sargoides, and Syrphus immaculatus Macquart. Moreover, Syrphus immaculatus Macquart is considered to be a species of the genus Toxomerus, and new species synonyms are also given: Baccha atypica Curran is a junior synonym of Syrphus conjunctus Wiedemann; Baccha flata Hull and Doros disjuncta Sack are jun. syn. of Syrphus sargoides Macquart; Baccha bromleyi Curran is a jun. syn. of Ocyptamus funebris Macquart; Baccha sepia Hull, Baccha danaida Hull, Baccha violacea Hull, and Baccha ursula Hull are all synonyms of Ocyptamus pullus (Sack); Baccha nerissa Hull is a jun. syn. of Pelecinobaccha hiantha (Hull); and Baccha panamensis Curran is a jun. syn. of Pelecinobaccha transatlantica (Schiner).

New generic concepts for orphaned lineages formerly treated as part of the genus Ocyptamus Macquart, 1834 (Diptera, Syrphidae)

“…Historical concepts of the New World genus Ocyptamus Macquart, 1834 (see Mengual et al 2018) have recently been scrutinized and reconsidered (e.g. Mengual et al 2012;Miranda et al 2016), resulting in proposals for a more restricted concept of Ocyptamus and the corresponding elevation of former subgenera and species groups to genus rank for those taxa that had generic names available (Miranda et al 2014;Miranda 2017a;Mengual et al 2018). Mengual et al 2018 provided an identification key to these taxa and some other closely related genera (i.e.…”

“…Mengual et al 2012;Miranda et al 2016), resulting in proposals for a more restricted concept of Ocyptamus and the corresponding elevation of former subgenera and species groups to genus rank for those taxa that had generic names available (Miranda et al 2014;Miranda 2017a;Mengual et al 2018). Mengual et al 2018 provided an identification key to these taxa and some other closely related genera (i.e. Dioprosopa Hull, 1949a, Eosalpingogaster Hull, 1949d, Leucopodella Hull, 1949a, Rhinoprosopa Hull, 1942c, Salpingogaster Schiner, 1868, and Toxomerus Macquart, 1855, but they treated some of the clades as Ocyptamus sensu lato species groups until proper new generic assignments could be provided.…”

Flower flies (Diptera: Syrphidae) in Pampean agroecosystems: a study case

“…Para la determinación de las moscas de las flores se utilizaron las claves de Hull (1946), Lagrange (1987;1990a;1990b;1992), Thompson (1997Thompson ( , 19992006), Thompson et al (1990Thompson et al ( , 2000, Thompson & Thompson (2006), Borges & Couri (2009) y se actualizó la clasificación taxonómica de algunos géneros (Mengual et al, 2018a(Mengual et al, , 2018bMiranda et al, 2020). En otros casos se compararon los especímenes con material de referencia determinado por F.C.…”

Aspectos biológicos y capacidad depredadora del sírfido Ocyptamus gastrostactus (Wiedemann, 1830) (Diptera: Syrphidae) alimentado con Aphis craccivora Koch, 1854 (Hemiptera: Aphididae) en condiciones de laboratorio

“…Los terguitos abdominales (segundo, tercer y cuarto) del macho presentan un par de máculas circulares de color amarillo, ausente en las hembras. El macho tiene una longitud promedio de 11,8 mm y la hembra de unos 11,0 mm (Miranda 2005;Mengual et al 2018).…”