Dasysyrphus pinastri (DeGeer)

Locke, Michelle M. & Skevington, Jeffrey H., 2013, Revision of Nearctic <i> Dasysyrphus </ i> Enderlein (Diptera: Syrphidae), Zootaxa 3660 (1), pp. 1-80 : 62-64

publication ID	https://doi.org/ 10.11646/zootaxa.3660.1.1
publication LSID	lsid:zoobank.org:pub:95ADD39C-98BE-4879-B070-34A5D86BD67B
persistent identifier	https://treatment.plazi.org/id/03893F32-FF8E-FF9E-FF46-FCDEFDEF8AF8
treatment provided by	Felipe
scientific name	Dasysyrphus pinastri (DeGeer)
status

Treatment

Dasysyrphus pinastri (DeGeer) View in CoL

Figures: 15A–D, 18C, 21D

Synonyms and References:

Musca pinastri De Geer 1776: 113 , Pl. 7 Fig. 1–7 View FIGURE 1 View FIGURE 2 View FIGURE 3 (original description)

Syrphus lunulatus View in CoL of authors nec. Meigen

Dasysyrphus pinastri (De Geer) :

Vockeroth 1992: 70 (key and redescription)

Doczkal 1996: 40 (discussion and character chart)

Mutin & Barkalov 1999: 398 (key)

Stubbs & Falk 2002: 88 (key and discussion)

Reemer 2002: 14 (key and discussion)

van Veen 2004: 88 (key)

Barkalov 2007: 288 (key and redescription)

Bartsch et al. 2009: 199 (key and redescription)

Krpac et al. 2009: 105 (discussion)

Speight 2011: 71 (discussion)

Diagnosis: Abdominal maculae of tergites 3&4 slightly arcuate, uniform in thickness and do not cross abdominal margin ( Figs 15A & B View FIGURE 15 ); very similar in appearance to D. pauxillus ( Fig. 14A View FIGURE 14 ), D. pacificus ( Fig. 13A View FIGURE 13 ), D. nigricornis ( Figs 11A & B View FIGURE 11 ) and D. laticaudus ( Fig. 8A View FIGURE 8 ), sternite 2 with dark macula ( Fig. 18C View FIGURE 18 ), dark marking is fasciate in the other species. Male surstylus with posterolateral corner is much less prominent ( Fig. 15D View FIGURE 15 ) than in other pauxillus group species ( Figs 8C View FIGURE 8 , 11D View FIGURE 11 , 13D View FIGURE 13 & 14D View FIGURE 14 ).

Redescription:

Body Length: 8.4–10.4mm; Wing Length: 7.8–9.0mm

Head: Frons dark with light pollenose fascia (in males it runs along ventral edge of where eyes meet, in females it is ⅓ the length between the antennae and ocelli) and dark pile; face light with dark vitta ¼–⅓ the width of the face, not reaching antennal socket, face with light pile; gena dark (sometimes slightly lighter posteroventrally) with light pile and usually some dark pile below eye; occiput dark, covered in light pollen, pile light; scape, pedicel and flagellomere dark, usually uniform in colour, flagellomere sometimes appears slightly lighter.

Thorax: Scutum dark, may appear shiny or metallic, pile light; scutellum light with darker anterolateral edges, dark pile with few light pile along anterior edge; wing cells r 1 and br usually with bare base (in br above spurious vein only), cell c sometimes with very small bare areas, cup with very small bare areas below vein CuP, bm densely microtrichose throughout ( Fig. 15C View FIGURE 15 ); haltere light but can be slightly darkened in areas; femora ⅓–¾ dark basally, ¼–⅔ light apically, tibiae light, metatibia with dark band ¼ of the way from the apex, sometimes extending to apex, tarsi light, sometimes dark anteriorly.

Abdomen: Maculae on tergite 2 large and oval, maculae on tergites 3&4 are oblique, anterior edge slightly concave and posterior edge straight, never meeting medially, maculae do not reach abdominal margin ( Figs 15A & B View FIGURE 15 ); sternite 2 with dark macula, sternites 3&4 light with dark fasciae.

Male Genitalia: Surstylus more or less triangular in shape in lateral view, flattened posteriorly and posterolateral corner is much less prominent than in other pauxillus group species, long pile on dorsal, laterodorsal and posterodorsal sides, row of spines on posteromedial edge; cercus oval with long pile over entire surface; gonostylus boot-shaped with projection on posterodorsal surface, projecting dorsally, pile on dorsal surface; basiphallus elongate, basally bent at a slightly more than 90 degree angle towards dorsum, apical end curved ventrally and partly membranous dorsally, with spines on posterodorsal side; distiphallus elongate, apical end flared out into horn, which is mostly sclerotized but membranous at apex, with few setulae dorsally, basally it is curved towards dorsum and not greatly enlarged at bend ( Fig. 15D View FIGURE 15 ).

Intraspecific variation: Gena is dark but in some specimens can be slightly lighter posteroventrally; wing cells r 1 and br usually with bare base, cell c sometimes with very small bare areas.

Etymology: From the Latin pinus, meaning pine and –aster, a diminutive suffix meaning little.

Distribution: Greenland and Europe ( Fig. 21D View FIGURE 21 ).

Ecology: Collected from May to July. One specimen was collected from an elevation of 2200m.

Discussion: Within the Nearctic, D. pinastri is only found in Greenland. It is found throughout the Palaearctic from the United Kingdom to Scandinavia, south to Italy. Due to its similar habitus to other species in the Palaearctic there has been widespread confusion about this species and its concept ( Doczkal 1996; Reemer 2002; Speight 2011). The main reason for such confusion is that the syntypes of this species are lost ( Thompson & Pont 1994). They were not in the De Geer collection when it was donated to the Naturhistoriska Riksmuseet (The Swedish Museum of Natural History) in Stockholm, Sweden, in 1834 (Thompson & Nielsen 1984; Thompson & Pont 1994). Thompson & Pont (1994) designated the specimen illustrated by De Geer (1776, Pl. 7 Fig. 1 View FIGURE 1 ) as the lectotype for pinastri . Since this lectotype has been missing for over 175 years and because this has lead to confusion about the species concept, a neotype is designated here to bring stability of the name pinastri . This designation will create a solid concept for this species, allowing for better reconciliation with closely related species. Characters are consistent with De Geer’s (1776) vague description of the adult and with Doczkal’s (1996) characters used to distinguish it from pauxillus s.l. and lenensis . De Geer (1776) does not state the locality/ localities of his specimens, however, as he was from Sweden and reared these flies from larvae it is likely that he collected them close to home. Therefore the Neotype chosen is from Sweden. The Neotype is a male from Holmsund Vb., Sweden, collected on 1.vii.1967 by W.J. Boyes. It is deposited in the CNC and databased with the number Jeff Skevington Specimen 18310. The genitalia have been dissected and a leg was removed to sequence the 5´region of COI.

Type Material: “Holmsund/ Vb., SWEDEN / 1.VII.1967 / J.W. Boyes ”, “Boyes Cytolog./ Coll. # WS101/ To remain/ in C.N.C.”, “ J. Skevington / Specimen #/ 18310”, “ Dasysyrphus / pinastri DeG./ Det. J. R. Vockeroth”, “ NEOTYPE / Musca / pinastri/ De Geer”, “designated by/ Locke &/ Skevington/ 2013”; ♂; right meso- and metalegs missing; genitalia dissected, in vial on specimen pin; deposited in the Canadian National Collection of Insects , Arachnids and Nematodes ( CNC), Ottawa, Ontario, Canada .

Material Examined:

Denmark: Fellins Skov , 22.v.1967, ♂, CNCD 26450 , E. Torp ( CNC). Hytter Kobbel, Sdrj. , 24.vi.1967, ♀, CNCD 26456 , E. Torp ( CNC). Lillebro, Loso , 25.vi.1966, ♀, CNCD 26457 , E. Torp ( CNC). North Denmark Region: Bangsbo Skole , [57.424683, 10.519762], 2.vi.1967, ♂, CNCD 26448 GoogleMaps , E. Torp ( CNC). South Denmark: Draved Skov , [55.016651, 8.983375], 10.v.1966, ♂, CNCD 26447 , ♀, CNCD 26455 GoogleMaps , E. Torp ( CNC) . Greenland: Sondrestom Air Base , [67.010556, -50.709167], 30.viii.1952, ♀, CNCD 26459 GoogleMaps , W.J. Brown ( CNC) . Italy: Piedmont: Celle de Bellino , [44.579948, 7.007859], 11–12.vii.1974, intersex, JSS 18309, W. Baker ( CNC) GoogleMaps .

Poland: Szklarska Porpba, distr. Telenia Gora Taka, 9.vii.1958, ♂, CNCD 26449 , R . Trojan ( CNC) . Sweden: Västerbottens Län: Holmsund, [63.705557, 20.37888], 1.vii.1967, ♀, CNCD 26454,3 GoogleMaps . vii.1967, ♂, JSS 18311, ♀, CNCD 26453 , J.W. Boyes ( CNC) . Switzerland: Valais: Zermatt, Rifolalb, 2200m, 23.vi.1959, ♀, CNCD 26458 , F. Keiser ( CNC) . Jura: Delemont, [47.365206, 7.343584], 17–24.v.1969, ♂, JSS 18308, Herting & Wood ( CNC) GoogleMaps .

United Kingdom: England: Bristol, Westbury , [51.502888, -2.601311], 18.v.1959, ♂, CNCD 26446 GoogleMaps , M. Ackland ( CNC). Staffordshire, Newcastle-under-Lyme , [53.008764, -2.231836], 6.vi.1960, ♀, CNCD 26452 GoogleMaps , J. R. Vockeroth ( CNC). Cumbria, Lakes District National Park, Blea Tarn , [54.429748, -3.092892], 5.vi.1941, 2♂, CNCD 26444 , 26445 GoogleMaps , G.E. Shewell ( CNC).