Shipsa rotunda
Creators: name: Grubbs, Scott A.
name: Baumann, Richard W.
Publisher: name: Zenodo
Year: 2023
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Plecoptera
Nemouridae
Shipsa
Shipsa rotunda

description: 13. Shipsa rotunda (Claassen, 1923)
Intrepid Forestfly
http://lsid.speciesfile.org/urn:lsid: Plecoptera.speciesfile.org:TaxonName:6089
(Figs. 6, 95–98)
Nemoura rotunda Claassen 1923. Holotype male (Cornell University Insect Collection), Waldoboro, (Lincoln Co.), Maine, USA
Nemoura rotunda: Needham & Claassen, 1925:219
Nemoura rotunda: Claassen, 1940:62
Nemoura rotunda: Ricker, 1944:177
Nemoura rotunda: Harden & Mickel, 1952:17
Nemoura (Shipsa) rotunda: Ricker, 1952
Shipsa rotunda: Illies, 1966
Nemoura (Shipsa) rotunda: Harper & Hynes, 1971:1139
Shipsa rotunda: Zwick, 1973
Nemoura (Shipsa) rotunda: Hitchcock, 1974:104
Shipsa rotunda: Baumann, 1975:54, 63 (in part), 66 (in part)
Shipsa rotunda: Dosdall & Lehmkuhl, 1979:38
Shipsa rotunda: Stewart & Stark, 1988:185
Shipsa rotunda: Poulton & Stewart, 1991:30
Shipsa rotunda: Stewart & Stark, 2002:211
Shipsa rotunda: Stewart & Oswood, 2006:81
Shipsa rotunda: Grubbs & Baumann, 2021:51
Distribution. AB, LB, MB, NB, NS, NT, NU, ON, PQ, SK. USA: AK, AL, AR, GA, IA, IL, MA, MD, ME, MI, MN, MS, NC, NE, NH, NY, SC, VA, VT, WI (DeWalt et al. 2022)
Male. Macropterous. Body length 4.9–5.9 mm, forewing length 5.7–6.6 mm (n = 10). Gills absent. Cerci simple and unmodified (Figs. 95‒96). Tenth tergum produced distally as a pair of elongated spiny lobes (Figs. 95‒96). Paraprocts undivided as a sclerotized, triangular lobe. Epiproct compact and complex; dorsal sclerite with three units, basally with paired ca. parallel, elongated lobes (Fig. 95), extending slightly anteriorly as medially-concave narrow ridges (Fig. 95), and somewhat laterally as tapered, lateral arms curving dorsally (Fig. 95); ventral sclerite broadest basally, nearly devoid of hairs or spines, extending dorsally and slightly recurved anteriorly as paired lobes (Fig. 96).
Female. Macropterous. Body length 5.7–7.3 mm, forewing length 6.8–8.4 mm (n = 12). Gills absent. Cerci simple and unmodified. Subgenital plate sclerotized, not produced, and concave medially where the 7 th sternum extends to anterior margin of 8 th sternum (Figs. 97‒98). In relaxed females, a t-shaped sclerotized band is present at the terminus of the 8 th sternum (Fig. 97) but obscured and not seen in most preserved specimens (Fig. 98).
Larva. Described by Harden & Mickel (1952) and Harper & Hynes (1971). Stewart & Stark (2002) provided a full habitus illustration. Additional illustrations were also given by Baumann (1975), Poulton & Stewart (1991) and Harper & Stewart (1996).
Comments. Shipsa rotunda is a monotypic species with a very broad longitudinal distribution across North America, from western Alaska east across Canada to Labrador, New Brunswick, and Nova Scotia, distributed extensively in the USA from the Laurentian Great Lakes region east to New England, but also from Arkansas east to Georgia and north to Maryland (Grubbs & Baumann 2021; DeWalt et al. 2022). The type locality as listed in Claassen (1923, pg. 290) was spelled incorrectly as Waldeboro (sic).
description: Published as part of Grubbs, Scott A. & Baumann, Richard W., 2023, The Nemourinae (Insecta, Nemouridae) of the eastern Nearctic, pp. 1-53 in Zootaxa 5306 (1) on pages 29-30, DOI: 10.11646/zootaxa.5306.1.1, http://zenodo.org/record/8054287