Dixa vockerothi Moulton, 2017, sp. nov.
Bibliographic record
Abstract
Dixa vockerothi sp. nov. (Figs 18–20, 23) Dixa brevis Peters & Cook, 1966: 241, not Garrett, 1924: 6 (misidentification of northeastern North American specimens). Type material. HOLOTYPE, ♂ labeled: “Old Chelsea/ Que. 5.xi.1958 / J.R. Vockeroth”; “ Dixa brevis / Garrett/ Det. T.M. Peters 1964”; “HOLOTYPE/ Dixa / vockerothi / J.K. Moulton [red label]” (CNC). PARATYPES: Old Chelsea, 5.xi.1958, J.R. Vockeroth (10♂; CNC); Same data, except 15.x.1958, J.R. Vockeroth (10♂; CNC). Additional material examined. CANADA: NS: Grande Anse R, Cape Breton Highlands NP, 8–10.vii.1984, I.M. Smith (1♂, CNC); Kentville, 6.viii.1958, J.R. Vockeroth (14♂; CNC); Lone Shieling, swept along fast rocky stream, 11.vii.1983, J.R. Vockeroth (2♂, 2♀; CNC). ON: Normandale, 42°42′ 80°19′, 21.v.1956, J.R. Vockeroth (1♂, CNC); Sterling, 14.x.1956, J.R. Vockeroth (2♂, CNC); Ottawa, 30.ix.1956, J.R. Vockeroth (1♂, CNC); Ottawa, Hog ′s Back, 16.x.1947, G.E. Shewell (2♂, CNC). QC: Eardley, 18.x.1956, J.R. Vockeroth (2♂, CNC); Gatineau Park, Mackenzie King Falls @ Waterfall Tr, N45°28′41.08″ W75°51′02.98″, ex. above falls, 24.vi.2009, B.J. Sinclair (2♀, CNC); King Mtn, sm str, 16.xi.2011, B.J. Sinclair (1♂, CNC); Lac Philippe [Gatineau Park], 45° 37′N 76°W, 22.viii.1959, J.R. Vockeroth (1♂, CNC); Old Chelsea, Mulvihill Brook at Mountain Rd, in one moderately dense swarm 6–8′ over stream, 5.xi.1958, J.R. Vockeroth (22♂, 1♀, CNC: ethanol); Old Chelsea, 5.xi.1958, J.R. Vockeroth (21♂, CNC); Old Chelsea, 15.x.1958, J.R. Vockeroth (42♂, CNC); Old Chelsea, 5.ix.1958, C.H. Mann (1♂, CNC); Old Chelsea, 22.vii.1956, J.R. Vockeroth (1♂, CNC); Mt. Orford, 29.viii., 9.ix.1937, G.E. Shewell (2♂, CNC). USA: NC: HAYWOOD COUNTY, Woodfin Cascade, Blue Ridge Parkway NP, N35°27′08.30″ W83°06′10.6″, 16.vii.2006, J.K. Moulton & G.R. Curler (2♂, 1L, ANSP); same locality, 24.vii.2011, JKM (1♀, ANSP). NY: CATTARAUGUS COUNTY, Stoddard Hollow, 1720–1880 ft, 42°4′N W78°45′, 10.viii.1961, D.L. Deonier / J.L. Laffoon (10♂, 2♀, ISIC). Diagnosis. This species can be distinguished from D. ubiquita sp. nov. and D. elkmontensis sp. nov. by the following characters: Morphological. Basal gonocoxal lobe with apex more digitiform and dorsally directed (Fig. 18 vs. 12, 15), creating more conspicuously concave horizontal margin, most noticeable in terminal view (Fig. 20 vs. 14, 17). Anterior lobe of SES acute apically, with thin, strap-like, connection to ventral apodeme of proctiger acutely angled; distal lobe of SES narrow, lip-like in lateral view (Fig. 18). Apex of gonostylus not strongly twisted ca. 90° medially, most obvious in ventral view (Fig. 19). Molecular. Within the 66 nucleotides (22 codons) shown (Fig. 35) a thymine at position 46 (vs cytosine), an adenine at position 51 (vs. guanine), and a guanine at position 54 (vs. cytosine) serve to distinguish this species from the other two. Within the encompassing amplified fragment of BZF, D. vockerothi sp. nov. is 6.1% divergent from D. ubiquita sp. nov. and 9.1% divergent from D. elkmontensis sp. nov. (JK Moulton, unpublished). Description. Male. Same as D. ubiquita sp. nov., except as follows: Wing length (n =10) 3.8–4.1 (avg=4.0) mm. Terminalia (Figs 18–20): Basal gonocoxal lobe narrowed, less than half as broad as gonocoxite depth, with apex more digitiform and dorsally directed, with ventral margin straight to slightly convex (Fig. 18). Gonostylus with apex straight, not twisted ca. 90° medially, most obvious in ventral view (Fig. 19). Anterior lobe of SES rounded apically, with connection to 9T and ventral apodeme of proctiger broader; distal lobe of SES narrow, liplike in lateral view (Fig. 18). Female. Wing length (n =7) 4.4–4.9 (avg=4.6) mm. Not reliably distinguishable from D. ubiquita sp. nov. or D. elkmontensis sp. nov. Etymology. Named in honor of Dr. Richard (Dick) Vockeroth, who collected numerous adults of this species, including the type series, from several localities in and around the Gatineau area and elsewhere in eastern Canada. Distribution. Dixa vockerothi sp. nov. appears to be the most northerly distributed of the three members of this species group (Fig. 34). It is confirmed from numerous localities in the Gatineau Hills region of Quebec, a few sites in Nova Scotia, one site in the Alleghany Mountains of Pennsylvania, and one site in the Southern Appalachian Highlands of western North Carolina. Remarks. Dixa vockerothi is found in high gradient, rapidly flowing streams 3–5 m in width with waterfalls, often stair-cased ones (Figs 32, 33). It occurs with D. ubiquita sp. nov. in Woodfin Cascades in western NC, and no other dixid associations are known.
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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 | 0.002 |
| Meta-epidemiology (narrow) | 0.002 | 0.001 |
| Meta-epidemiology (broad) | 0.001 | 0.000 |
| Bibliometrics | 0.003 | 0.003 |
| Science and technology studies | 0.005 | 0.002 |
| Scholarly communication | 0.002 | 0.004 |
| Open science | 0.002 | 0.002 |
| Research integrity | 0.002 | 0.003 |
| Insufficient payload (model declined to judge) | 0.017 | 0.014 |
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".