Nemoura arctica Esben-Petersen 1910
Bibliographic record
Abstract
1. Nemoura arctica Esben-Petersen, 1910 Arctic Forestfly http://lsid.speciesfile.org/urn:lsid: Plecoptera.speciesfile.org:TaxonName:6232 (Figs. 1, 9–18) Nemoura arctica Esben-Petersen 1910:85. Holotype male (Museum unknown), Karasjok, Norway Nemoura trispinosa Claassen, 1923:289. Syn. Grubbs et al., 2018:48 Nemoura trispinosa: Needham & Claassen, 1925:213 Nemoura arctica: Claassen, 1940:50 Nemoura trispinosa: Claassen, 1940:64 Nemoura trispinosa: Frison, 1942:261 Nemoura trispinosa: Harden, 1942:322 Nemoura trispinosa: Ricker, 1944:177 Nemoura arctica: Koponen & Brinck, 1949:7 Nemoura trispinosa: Weber, 1950:175 Nemoura arctica: Brinck, 1952:107 Nemoura trispinosa: Harden & Mickel, 1952:19 Nemoura (Nemoura) arctica: Ricker, 1952:36 Nemoura arctica: Zhiltzova, 1964:187 Nemoura arctica: Illies, 1966:194 Nemoura trispinosa: Illies, 1966:214 Nemoura (Nemoura) arctica: Harper & Hynes, 1971:1133 Nemoura (Nemoura) trispinosa: Harper & Hynes, 1971:1133 Nemoura arctica: Lillehammer, 1972:163 Nemoura trispinosa: Lillehammer, 1972:163 Nemoura arctica: Zwick, 1973:332 Nemoura trispinosa: Zwick, 1973:342 Nemoura (Nemoura) trispinosa: Hitchcock, 1974:107 Nemoura arctica: Lillehammer, 1974:82 Nemoura arctica: Baumann, 1975:51, 64 (in part) Nemoura trispinosa: Baumann, 1975:51 Nemoura arctica: Baumann et al., 1977:34 Nemoura arctica: Lillehammer, 1988:113 Nemoura trispinosa: Stewart & Stark, 1988:169 Nemoura trispinosa: Stewart & Stark, 2002:196 Nemoura arctica: Zhiltzova, 2003:266 Nemoura arctica: Kondratieff & Baumann, 2004:114 Nemoura arctica: Stewart & Oswood, 2006:78 Nemoura arctica: Boumans, 2011:286 Nemoura arctica: Judson & Nelson, 2012:33 Nemoura arctica: Grubbs et al., 2018:48 Distribution (Nearctic only). Canada: AB, BC, LB, MB, NB, NF, NS, NT, NU, ON, PE, PQ, SK, YK; USA: AK, IA, IL, ME, MI, MN, NH, NY, OH, PA, SD, WI, WV, WY (DeWalt et al. 2022) Male. Macropterous. Body length 4.7–5.9 mm, forewing length 4.1–6.1 mm (n = 25). Gills absent. Cerci sclerotized laterally and modified, outer edge produced and terminates typically in a pair of appressed spines that vary in length and degree of tapering, plus an outer spine that is variable (Figs. 9–13). The outer spine is distally forked (Fig. 13) or not (Fig. 12). Populations further westward vary from the eastern Nearctic males. For example, males from South Dakota have an outer spine that is rectangular and crenulated distally (Grubbs et al. 2018, their fig. 5). Paraproct outer lobes straight anteriorly and slightly trilobed posteriorly. The base of the cerci fit between the anterior and medial lobe. Epiproct short and robust, recurved anteriorly over the terminal abdominal segments (Figs. 9–11); in lateral aspect, the basal cushion occupies the anterior ca. ½ and is separated from the dorsal sclerite by smooth lateral areas (Fig. 14). The lateral areas are recurved slightly over the distal medial portion of the basal cushion. The dorsal sclerite appears scaly at high magnifications, especially apically (Fig. 14). The dorsal sclerite is open apically, exposing parallel, broad, hatchet-like apical prongs of the ventral sclerite (Figs. 11, 15–16) and prominent, scaly, apical prongs positioned ca. perpendicular to the ridges (Figs. 15–16). The prongs terminate laterally bearing two short, thick, grooved spines (Figs. 15–16). Female. Macropterous. Body length 5.4–7.4 mm, forewing length 4.6–7.6 mm (n = 23). Gills absent. The 7 th sternum is produced as a broadly-subtruncate to subtriangular subgenital plate that extends over minimally across ½ of the 8 th sternum (Figs. 17–18). Larva. Described by Brinck (1949, 1952), Harden & Mickel (1952, as N. trispinosa), and Harper & Hynes (1971, as N. trispinosa). A partial illustration was also given in Frison (1942, as N. trispinosa) and Harper & Stewart (1996). Stewart & Stark (1988, 2002) provided a description and full habitus illustration as N. trispinosa. Comments. Grubbs et al. (2018) recently provided evidence with scanning electron micrographs that Nearctic N. trispinosa is a junior synonym of Holarctic N. arctica. Nemoura arctica is distributed extensively at mid- to northern latitudes across the Northern Hemisphere (DeWalt et al. 2022).
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How this classification was reachedexpand
Full frame machine prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. The Gemma side is a direct model label for every work in the frame, read from the title-only record. The Codex side is a classifier learned from the 10,348 direct Codex labels and calibrated to design-weighted sample rates; fields without enough sample support carry no Codex call. Candidate is the union of the two sides; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels.
Distilled classifier scores by category (both heads)
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.000 | 0.000 |
| Meta-epidemiology (narrow) | 0.001 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.002 | 0.002 |
| Science and technology studies | 0.002 | 0.001 |
| Scholarly communication | 0.001 | 0.001 |
| Open science | 0.001 | 0.001 |
| Research integrity | 0.001 | 0.001 |
| Insufficient payload (model declined to judge) | 0.039 | 0.019 |
Machine scores (provisional)
The two teacher heads of the student model, read on this work. A score orders the frame for review; it never asserts a category, and the validation status ships verbatim with every row.
Baseline scores from an immature model (maturity gate not passed, 7 training rounds). Scores rank; they never assert a category.
score_only:v0-immature-baseline · verbatim from the scoring run: score_only means the number may rank works, and no category label ships from itClassification
machine, unvalidatedMachine predicted; a candidate call from one source (direct Gemma or distilled Codex), not a consensus.
How this classification was reached, model by model and score by score, is at the end of the page under "How this classification was reached".