Nemoura normani Ricker 1952
Creators: name: Grubbs, Scott A.
name: Baumann, Richard W.
name: Burton, David K.
Publisher: name: Zenodo
Year: 2018
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Plecoptera
Nemouridae
Nemoura
Nemoura normani

description: <i>Nemoura normani</i> Ricker Alaska Forestfly http://lsid.speciesfile.org/urn:lsid: Plecoptera.speciesfile.org: TaxonName:6350 <i>Nemoura</i> species E: Ricker 1944:177. <i>Nemoura</i> sp. A: Weber 1950:175. <i>Nemoura normani</i> Ricker 1952:37. Type locality – Mackenzie River, Fort Norman, Northwest Territories (Holotype &amp;female; and Paratype &amp;female; examined) <i>Nemoura normani</i>: Illies 1966:209. <i>Nemoura normani</i>: Stewart &amp; Oswood 2006:78. <b>Distribution.</b> Canada: NT. USA: AK (DeWalt et al. 2018). <b>Diagnosis.</b> <i>Nemoura normani</i> was described from the holotype female and one paratype female (Ricker 1952) and is still unknown from the male stage. The females were described as “noticeably larger” than both <i>N. arctica</i> and <i>N. trispinosa</i> and exhibit subtle differences in the shape of the subgenital plate (Ricker 1952). Stewart and Oswood (2006) examined the paratype female (Alaska, Anaktuvik Pass, 6 July 1949, preserved in alcohol) during their study of the stoneflies of Alaska and western Canada but were unable to collect additional material. We likewise studied the paratype female and determined that it was indeed a <i>Nemoura</i> female with the correct wing venation, sclerotized cerci, and no cervical gills. The color of the wings are fumose in alcohol. This species is perhaps also absent from the Yukon (Stewart and Ricker 1997). Hence, the two females remain the only specimens of this species collected and none since 1949. Males or molecular data are needed to determine if this is a valid species, another <i>Nemoura</i> species (Ricker, 1964), or a junior synonym of either <i>N. arctica</i> or <i>N. sahlbergi</i>. <b>Conclusions</b> We present morphological evidence with SEM micrographs of the male epiprocts and cerci to propose that Nearctic <i>N. rickeri</i> and Nearctic <i>N. trispinosa</i> are junior synonyms of Holarctic <i>N. arctica</i> and Palearctic <i>N. sahlbergi</i>, respectively. Hence, both <i>N. arctica</i> and <i>N. sahlbergi</i> exhibit Holarctic distributions. On a similar note, Boumans &amp; Baumann (2012) synonymized <i>Amphinemura linda</i> (Ricker, 1952), a species recognized for ca. 65 years, with <i>A. palmeni</i> (Koponen, 1917) using a combination of external reproductive morphology plus mitochondrial COI subunit and nuclear 28S gene sequence data. <i>Amphinemura palmeni</i> likewise is a Holarctic species (DeWalt et al. 2018).
description: Published as part of <i>Grubbs, Scott A., Baumann, Richard W. &amp; Burton, David K., 2018, Nearctic Nemoura Trispinosa Claassen, 1923 And N. Rickeri Jewett, 1971 Are Junior Synonyms Of Holarctic Nemoura Species (Plecoptera: Nemouridae), pp. 44-64 in Illiesia 14 (3)</i> on page 57, DOI: 10.5281/zenodo.4761204
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