Abstract
Species of Macrosiagon Hentz are known to be wasp and bee parasitoids. Here, we present information on Macrosiagon octomaculata (Gerstaecker, 1855), including eggs and triungulinids, found on Paepalanthus polyanthus (Bong.) Sano (Eriocaulaceae) blooming in restinga habitat on Santa Catarina Island, South Brazil. This is the first record of an Eriocaulaceae species playing an important role in the Macrosiagon bionomics and the first accurate record of Ripiphoridae for southern Brazil, Santa Catarina state. In the study area, P. polyanthus attracted an inordinate number of insect species and one Thynnidae wasp was captured with a triungulinid on its wing. Eggs and triungulinids were also found on one plant of P. polyanthus and associated with M. octomaculata. We provide descriptions of the female reproductive organs as well as the morphology of the triungulinid of M. octomaculata. A detailed examination of the triungulinid revealed novelties that complement information from previous publications regarding the Ripiphoridae. We also compare triungulinids of M. octomaculata with those of other species, and provide a table summarizing comparative characters. Finally, we provide a table with current information on the recorded host species and immatures of Macrosiagon.
Highlights
The Ripiphoridae Gemminger, 1870 is a small family of parasitoid beetles, divided into five subfamilies (Hemirhipidiinae, Pelecotominae, Ptilophorinae, Ripidiinae, and Ripiphorinae), 41 genera, and around 400 species worldwide (Linsley & MacSwain, 1951; López-Colón, 1997; Falin, 2003; Lawrence et al, 2010; Falin & Engel, 2014; Barclay, 2015)
We present information on Macrosiagon octomaculata (Gerstaecker, 1855), including eggs and triungulinids, found on Paepalanthus polyanthus (Bong.) Sano (Eriocaulaceae) blooming in restinga habitat on Santa Catarina Island, South Brazil. This is the first record of an Eriocaulaceae species playing an important role in the Macrosiagon bionomics and the first accurate record of Ripiphoridae for southern Brazil, Santa Catarina state
P. polyanthus attracted an inordinate number of insect species and one Thynnidae wasp was captured with a triungulinid on its wing
Summary
The Ripiphoridae Gemminger, 1870 is a small family of parasitoid beetles, divided into five subfamilies (Hemirhipidiinae, Pelecotominae, Ptilophorinae, Ripidiinae, and Ripiphorinae), 41 genera, and around 400 species worldwide (Linsley & MacSwain, 1951; López-Colón, 1997; Falin, 2003; Lawrence et al, 2010; Falin & Engel, 2014; Barclay, 2015). The larvae of the Pelecotominae and Hemirhipidiinae subfamilies are parasitoids of wood-boring beetles (e.g., Ptinidae and Cerambycidae); Ripiphorinae develop in Hymenoptera nests (e.g., Apidae, Crabronidae, Halictidae, Pompilidae, Scoliidae, Sphecidae, Tiphiidae and Vespidae) and the Ripidiini (Ripidiinae) are parasites of Blattodea. Of several species together (Hymenoptera: Tiphiidae) (Davis, 1919) In this context, this study aims to aggregate information on Macrosiagon octomacula‐ ta at both, the species and genus levels, describing the egg, triungulinid and female reproductive organs as well as adding an accurate distributional record to southern Brazil. We report a wasp species carrying a triungulinid, adult feeding habits, the first record of oviposition on Eriocaulaceae, and compare the first instar larvae with those of other species of Ripiphoridae
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