Synopsis of Schizopteridae (Hemiptera, Heteroptera, Dipsocoromorpha) from the United States, with description of seven new species from the US and Mexico

Abstract

Because species diversity of the small true bug family Schizopteridae is greatest in tropical and subtropical areas, it is not surprising that only four species have been described from the United States. As part of a larger project on the taxonomy and phylogenetics of Schizopteridae, 178 specimens from the United States were examined. This material contained representatives of the previously described species Glyptocombussaltator Heidemann, 1906, Corixideamajor McAtee & Malloch, 1925, Nannocorisarenarius Blatchley, 1926, and Schizopterabispina McAtee & Malloch, 1925, but also six undescribed species. These new taxa are described as Glyptocombushalbertaesp. n., Glyptocombussuterisp. n., Nannocorisanophorussp. n., Nannocorisbrevipilussp. n., Schizoptera (Cantharocoris) rileyisp. n., and Schizoptera (Schizoptera) henryisp. n. Habitus images and genitalic illustrations of the previously described and the new species are provided as well as a map showing distribution ranges of these species in the United States and Mexico. To provide a comprehensive treatment of the small genus Glyptocombus Heidemann, 1906, Glyptocombusmexicanussp. n. is also described that, to our knowledge, occurs only in Mexico, and the female of one additional undescribed Glyptocombus species is documented from Mexico.

Phylogenetic relationships and revised classification of the true bug infraorder Dipsocoromorpha (Insecta: Hemiptera: Heteroptera)

“…Our framework of hypotheses is primarily based on recognition of similar vein and cell patterns, and not on the light microscopical observation of tracheae within a given longitudinal vein that proved to be difficult due to the small size and preservation of specimens. This new hypothesis is reflected in the forewings of 18 taxa shown in Figs 4 and 5, and is mostly consistent with Knyshov et al (2016) and Weirauch et al (2018a, 2018c). In short, we propose that the anterior costal margin in Dipsocoromorpha comprises C + Sc, distally followed by R with between one and three branches reaching the costal margin; we treat the distalmost veins reaching the wing margin as M and Cu.…”

“…Several of the above‐mentioned venation hypotheses are incompatible, mainly disagreeing on the interpretation of costal and anal veins, and corresponding cells. We recently proposed the core of a set of new homology hypotheses for Dipsocoromorpha wing venation (Weirauch et al, 2018a). That study included only representatives of Hypselosomatinae and Schizopterinae (Schizopteridae).…”

New records of Schizopteridae (Heteroptera: Dipsocoromorpha) from Southern Brazil

“…suteri Weirauch, Hoey-Chamberlain & Knyshov, 2018;G. halbertae Weirauch, Hoey-Chamberlain &Knyshov, 2018 andG. mexicanus Weirauch, Hoey-Chamberlain &Knyshov, 2018).…”

“…halbertae Weirauch, Hoey-Chamberlain &Knyshov, 2018 andG. mexicanus Weirauch, Hoey-Chamberlain &Knyshov, 2018). These species occur in United States and Mexico (Heidemann 1906;McAtee & Malloch 1925;Emsley 1969;Allen & Carlton 1989;Weirauch et al 2018).…”

“…Schizopteridae has two subfamilies (sensu Schuh & Weirauch 2020): Hypselosomatinae known from the Indo-Pacific, Australian and Neotropical regions; and Schizopterinae, with a worldwide distribution (McAtee & Malloch 1925;Emsley 1969;Weirauch 2012). Currently, Schizopteridae is the largest family of Dipsocoromorpha, with ~60 genera and about 355 described species (Weirauch 2012;Weirauch et al 2018). However, it is estimated that there may be about 1,200 species of Schizopteridae in the world, especially in the Neotropics, where the fauna is poorly studied (Weirauch 2012).…”