Lasioglossum (Dialictus) pictum ( Crawford, 1902 )

Gardner, Joel & Gibbs, Jason, 2020, The ‘ red-tailed’ Lasioglossum (Dialictus) (Hymenoptera: Halictidae) of the western Nearctic, European Journal of Taxonomy 725, pp. 1-242 : 169-172

publication ID

https://doi.org/10.5852/ejt.2020.725.1167

publication LSID

lsid:zoobank.org:pub:89FA8DDF-F4B9-417A-A5AF-B2BC9660E024

DOI

https://doi.org/10.5281/zenodo.4337918

persistent identifier

https://treatment.plazi.org/id/03F287F3-21E5-FF4D-8AEA-FCA631E8FCC9

treatment provided by

Plazi

scientific name

Lasioglossum (Dialictus) pictum ( Crawford, 1902 )
status

 

Lasioglossum (Dialictus) pictum ( Crawford, 1902)

Figs 74 View Fig , 90L View Fig , 102A View Fig , 105A View Fig

Halictus pictus Crawford, 1902: 236 (syntypes, ♀♀, deposited in UNSM, examined).

Halictus graenicheri Ellis, 1914b: 221 (holotype, ♀, deposited in USNM, examined; synonymy by Mitchell 1960).

Dialictus muskegoensis Mitchell, 1960: 439 (holotype, ♂, deposited in NCSU, examined by second author; synonymy by Mitchell 1962).

Halictus (Chloralictus) pictus – Sandhouse 1924: 3 (key).

Halictus (Chloralictus) graenicheri – Sandhouse 1924: 4 (key).

Lasioglossum (Chloralictus) graenicheri – Michener 1951: 1113 (catalog).

Lasioglossum (Chloralictus) pictum – Michener 1951: 1116 (catalog).

Dialictus pictus – Mitchell 1960: 412 (key, redescription). — Knerer & Atwood 1962: 170 (checklist, biology). — Hurd 1979: 1970 (catalog). — Moure & Hurd 1987: 122 (catalog).

Lasioglossum (Dialictus) graenicheri – Krombein 1967: 463 (catalog).

Lasioglossum (Dialictus) muskegoense – Krombein 1967: 464 (catalog).

Lasioglossum (Dialictus) pictum – Krombein 1967: 465 (catalog). — Wolf & Ascher 2009: 144 (checklist). — Gibbs 2010: 249 View Cited Treatment , figs 178a–d, 179a–f (key, redescription); 2011 (key). — Scott et al. 2011: 31 (checklist). — Gibbs et al. 2017: 84 View Cited Treatment (checklist).

Diagnosis

Females of Lasioglossum pictum can be recognized by the face short (length/width ratio ~0.82), supraclypeal area dull, frons and mesepisternum with crowded punctures, scutum with dense but distinctly separated punctures (i ≤ 1 pd), postgena lineate, clypeus apical margin reddish brown to black, and T2–4 with dark spiracular spots. They are most similar to L. arenisaltans sp. nov. Females of L. arenisaltans sp. nov. have the face slightly longer (length/width ratio ~0.85), scutum very densely punctate (i <1 pd), and clypeus apical margin sometimes orange.

Males of L. pictum can be recognized by the face short (length/width ratio ~0.83), propodeum dorsolateral slope rugose, postgena lineate, face covered in relatively sparse tomentum not hiding the surface underneath, mesepisternum densely punctate (i ≤ 1 pd), S3–5 with uniform short hair (0.75– 1.25 OD), and legs and metasoma mostly dark reddish brown to black, becoming red to orange on the extremities. They are most similar to L. arenisaltans sp. nov. and L. zephyrus . Males of L. arenisaltans sp. nov. have a longer face (length/width ratio ~0.89) and legs and metasoma often entirely orange. Males of L. zephyrus have the mesosoma more finely and sparsely punctate (i=1–3 pd) and S3–5 with shorter, densely plumose hair concentrated laterally ( Fig. 116A View Fig ).

Etymology

Crawford (1902) named this species with the Latin perfect participle ‘ pictus ’ (‘painted’).

Material examined

Syntypes

UNITED STATES – Nebraska • 4 ♀♀; Sioux Co., War Bonnet Canyon ; [42.8° N, 103.6° W]; 23 Jun. 1901; M.A. Carriker Jr. leg.; ex wild rose; UNSM GoogleMaps 1 ♀; same location as for preceding; 3 Jun. 1901; M. Cary leg.; ex Symphoricarpos ; UNSM GoogleMaps 6 ♀♀; same location as for preceding; 23 Jun. 1901; J.C. Crawford leg.; ex wild rose; UNSM GoogleMaps 3 ♀♀; Crawford ; [42.68° N, 103.41° W]; 29 Jul. 1901; M.A. Carriker leg.; ex Mentzelia ; UNSM GoogleMaps .

Other material

CANADA – Alberta • 6 ♀♀; 11.8 km SSW of Empress (stabilizing dune); 50.8504° N, 110.0489° W; 24 May 2019; T.M. Onuferko leg.; CMNC. GoogleMaps – Manitoba GoogleMaps 2 ♀♀; Spirit Sands , SWPP (stabilized dune); 49.664° N, 99.2951° W; 30 May 2019; T.M. Onuferko leg.; CMNC. – Ontario GoogleMaps 1 ♀; Norfolk Co., South Walsingham , Pterophylla Farm ; [42.66° N, 80.52° W]; P.J. Carson leg.; WRME. – Saskatchewan GoogleMaps 2 ♀♀; 6.4 km NNW of Webb (active dune); 50.2341° N, 108.2403° W; 1 Jun. 2019; T.M. Onuferko leg.; CMNC GoogleMaps 1 ♀; 7.6 km NNW of Webb (active dune); 50.2431° N, 108.2503° W; 1 Jun. 2019; T.M. Onuferko leg.; CMNC GoogleMaps 5 ♀♀; N Bitter Lake, Tunstall (stabilizing dune); 50.1489° N, 109.8244° W; 2 Jun. 2019; T.M. Onuferko leg.; CMNC GoogleMaps .

UNITED STATES – Arizona • 2 ♀♀; 20 mi. N of Flagstaff; [35.51° N, 111.55° W]; 3 Jul. 1952; C. Liang, W. LaBerge, R.H. and L.D. Beamer leg.; SEMC GoogleMaps . – Colorado • 2 ♀♀, 1 ♂; Alamosa Co., Great Sand Dunes National Monument ; [37.8° N, 105.6° W]; 22 Jul.–8 Aug. 1978; H.E. Evans leg.; CSUC GoogleMaps 1 ♀; Alamosa Co., Sand Dunes National Monument ; [37.8° N, 105.6° W]; 21 Jun. 1955; Hugo G. Rodeck leg.; UCMC GoogleMaps 1 ♀; White Rocks, near Boulder; [40.06° N, 105.16° W]; 1676 m a.s.l.; 5 Jun. 1922; AMNH GoogleMaps 1 ♀; Wray ; 40° N, 102.1667° W; 1128 m a.s.l.; 17–19 Aug. 1919; AMNH GoogleMaps . – Kansas • 1 ♀; 9 mi S of Garden City ; [37.84° N, 100.87° W]; 12 Jun. 1952; Wille and Michener leg.; ex Melilotus officinalis ; SEMC GoogleMaps . – Michigan • 2 ♂♂; Berrien Co., Warren Dunes S.P. ; 41.903° N, 86.604° W; 6 Jul. 2014; J. Gibbs leg.; WRME GoogleMaps 1 ♂; Muskegon Co.; [43.3° N, 86.2° W]; 2 Aug. 1944; Dreisbach leg.; NCSU GoogleMaps . – Minnesota • 7 ♀♀; Anoka Co., Bunker Hills Reg. Park ; 45.2037° N, 93.2792° W; 278 m a.s.l.; 8 Jun. 2015; J. Gardner leg.; UMSP GoogleMaps 1 ♀; same location as for preceding; 20 Jul. 2015; J. Gardner leg.; UMSP GoogleMaps 6 ♀♀; Anoka Co., Bunker Hills Reg. Park ; 45.2105° N, 93.2877° W; 274 m a.s.l.; 8 Jun. 2015; J. Gardner leg.; UMSP GoogleMaps 1 ♀; Anoka Co., Bunker Hills Reg. Park ; 45.2109° N, 93.2864° W; 276 m a.s.l.; 1 Jul. 2015; J. Gardner leg.; ex Coreopsis palmata ; UMSP GoogleMaps 1 ♀; Anoka Co., Bunker Hills Reg. Park ; 45.2159° N, 93.2848° W; 277 m a.s.l.; 20 Jul. 2015; J. Gardner leg.; ex Amorpha canescens ; UMSP GoogleMaps 2 ♀♀; Anoka Co., Bunker Hills Reg. Park ; 45.2176° N, 93.2899° W; 274 m a.s.l.; 20 Jul. 2015; J. Gardner leg.; UMSP GoogleMaps 2 ♀♀; same location as for preceding; 10 Aug. 2015; J. Gardner leg.; UMSP GoogleMaps 2 ♀♀; same location as for preceding; 19 May 2016; J. Gardner leg.; UMSP GoogleMaps 7 ♀♀; same location as for preceding; 8 Jun. 2016; E. Evans leg.; UMSP GoogleMaps 1 ♀; Anoka Co., Bunker Hills Reg. Park ; 45.2176° N, 93.2898° W; 8 Jun. 2015; J. Gardner leg.; ex Tradescantia occidentalis ; UMSP GoogleMaps 1 ♀; Anoka Co., Cedar Creek Ecosystem Science Reserve ; 45.388° N, 93.1831° W; 283 m a.s.l.; 3 Jul. 2015; J. Gardner leg.; ex Oenothera clelandii ; UMSP GoogleMaps 8 ♀♀; Anoka Co., Cedar Creek Ecosystem Science Reserve ; 45.4029° N, 93.1993° W; 278 m a.s.l.; 12 Jun. 2015; J. Gardner leg.; UMSP GoogleMaps 2 ♂♂; Anoka Co., Cedar Creek Ecosystem Science Reserve ; 45.4037° N, 93.1834° W; 280 m a.s.l.; 12 Aug. 2015; J. Gardner leg.; ex Dalea villosa ; UMSP GoogleMaps 3 ♀♀; Anoka Co., Cedar Creek Ecosystem Science Reserve ; 45.40267° N, 93.19917° W; 255 m a.s.l.; 4 May 2015; E. Evans leg.; UMSP GoogleMaps 11 ♀♀; Anoka Co., Cedar Creek Ecosystem Science Reserve ; 45.43096° N, 93.18936° W; 247 m a.s.l.; 4 May 2015; E. Evans leg.; UMSP GoogleMaps 5 ♀♀; Isanti Co., Cedar Creek Ecosystem Science Reserve ; 45.4323° N, 93.1894° W; 281 m a.s.l.; 22 Jul. 2015; J. Gardner leg.; UMSP GoogleMaps 1 ♀; same location as for preceding; 12 Aug. 2015; J. Gardner leg.; UMSP GoogleMaps 1 ♀; same location as for preceding; 31 Aug. 2015; J. Gardner leg.; UMSP GoogleMaps 1 ♀; Isanti Co., Irving & John Anderson Co. Park ; 45.4617° N, 93.0536° W; 255 m a.s.l.; 21 May 2015; E. Evans leg.; ex Prunus virginiana ; UMSP GoogleMaps 1 ♀; Isanti Co., Irving & John Anderson Co. Park ; 45.462° N, 93.061° W; 261 m a.s.l.; 10 Jun. 2015; E. Evans leg.; UMSP GoogleMaps 1 ♀; Isanti Co., Irving & John Anderson Co. Park ; 45.4641° N, 93.0598° W; 20 Jul. 2015; E. Evans leg.; ex Melilotus officinalis subsp. alba ; UMSP GoogleMaps 1 ♀; Isanti Co., Irving & John Anderson Co. Park ; 45.4663° N, 93.0542° W; 248 m a.s.l.; 10 Jun. 2015; E. Evans leg.; UMSP GoogleMaps 7 ♀♀; Isanti Co., Irving & John Anderson Co. Park ; 45.46627° N, 93.05422° W; 248 m a.s.l.; 20 Jul. 2015; E. Evans leg.; UMSP GoogleMaps 1 ♀; Washington Co., Belwin Conservancy ; 44.9248° N, 92.7894° W; 230 m a.s.l.; 9 Jun. 2015; E. Evans leg.; ex Penstemon gracilis ; UMSP GoogleMaps 1 ♂; Washington Co., St. Croix Savanna Scientific and Natural Area ; 44.9955° N, 92.7788° W; 192 m a.s.l.; 21 Jul. 2015; E. Evans leg.; ex Verbena stricta ; UMSP GoogleMaps . – Nebraska • 4 ♀♀; McPherson Co., Sandhills Ag Lab ; [41.62° N, 100.83° W]; 15 Jul. 1972; UNSM GoogleMaps 4 ♀♀; same location as for preceding; 28 Jun.–10 Aug. 1972; UNSM GoogleMaps 2 ♀♀; McPherson Co.; 28 Jun.–10 Aug. 1972; J.L. Wedberg leg.; UNSM 1 ♀; 3 mi. E of Thedford; [41.98° N, 100.52° W]; 14 Jul. 1960; W.E. LaBerge leg.; ex Helianthus petiolaris ; UNSM GoogleMaps 2 ♂♂; 3 mi. S of Hyannis; [41.96° N, 101.76° W]; 12 Sep. 1961; Crew leg.; ex misc. vegetation; UNSM GoogleMaps 1 ♂; same location as for preceding; 10 Sep. 1961; Atyeo and Isakson leg.; ex dry prairie; UNSM GoogleMaps 1 ♀; 3.5 mi. W of Marquette; [41.01° N, 98.08° W]; 31 Jul. 1958; Atyeo and Andresen leg.; UNSM GoogleMaps 2 ♀♀; F. Crow Ranch , 25 mi. SW of Valentine; [42.7° N, 100.9° W]; 3 Sep. 1959; W.E. LaBerge leg.; ex Helianthus petiolaris ; UNSM GoogleMaps 1 ♀; same location as for preceding; 3 Sep. 1959; W.E. LaBerge leg.; ex Solidago ; UNSM GoogleMaps 1 ♀; Mitchell ; [41.94° N, 103.81° W]; 2 Aug. 1917; E.J. Yates leg.; ex Melilotus officinalis subsp. alba ; UNSM GoogleMaps 1 ♀; Smith Lake , 20 mi. S of Rushville; [42.42° N, 102.45° W]; 31 Aug. 1959; ex Helianthus petiolaris ; UNSM GoogleMaps 1 ♀; same location as for preceding; 31 Aug. 1959; W.E. LaBerge leg.; ex Erigeron ; UNSM GoogleMaps 3 ♀♀; West Point ; [41.84° N, 96.71° W]; Jun. 1900; UNSM GoogleMaps . – North Dakota • 22 ♀♀; Ransom Co., 7 mi. SE of Sheldon ; [46.52° N, 97.39° W]; 24 Sep. 1983; J.R. Powers leg.; EMEC GoogleMaps 11 ♀♀; Richland Co., 1 mi. SE of McLeod; [46.38° N, 97.28° W]; 8 Jun. 1991; J.R. Powers leg.; EMEC GoogleMaps 2 ♀♀; same location as for preceding; 2 Aug. 1995; J.R. Powers leg.; EMEC GoogleMaps . – Wisconsin • 1 ♀; Vernon Co., Genoa ; [43.58° N, 91.22° W]; 13 Jul. 1911; Graenicher leg.; USNM GoogleMaps .

Description

See Gibbs (2010) for a complete redescription and figures.

Range

Ontario west to Alberta and south to northern Arizona ( Fig. 74 View Fig ).

Floral records

ASTERACEAE Giseke : Coreopsis : C. palmata Nutt. Erigeron : E. philadelphicus L. (G10) • Helianthus : H. petiolaris Nutt. Solidago BORAGINACEAE Juss. Phacelia Juss. P. congesta Hook. (G10) • BRASSICACEAE Burnett : Lepidium L. (G10) • CAPRIFOLIACEAE Juss. Symphoricarpos Duhamel COMMELINACEAE Mirb. Tradescantia L. T. occidentalis (Britton) Smyth FABACEAE Juss. Amorpha : A. canescens Pursh Dalea : D. villosa (Nutt.) Spreng. Melilotus : M. officinalis (L.) Pall. M. o. subsp. alba (Medik.) H. Ohashi & Tateishi LAMIACEAE Martinov : Salvia L. S. texana (Scheele) Torr. (G10) • LOASACEAE Juss. Mentzelia L. • ONAGRACEAE Juss. Oenothera L. O. clelandii W. Dietr., P.H. Raven & W.L. Wagner PLANTAGINACEAE Juss. Penstemon Schmidel : P. gracilis Nutt. ROSACEAE Juss. Prunus L. P. virginiana L. • Rosa L. • SALICACEAE Mirb. Salix L. (G10) • VERBENACEAE J. St. -Hil. Verbena L. V. stricta Vent.

DNA barcodes

Nine sequences available (BOLD process IDs: DIAL020-06, DIAL021-06, DIAL102-06, DIAL103-06, DIAL104-06, DIAL343-06, DIAL434-06, DIAL435-06, LASNA022-08; BIN: BOLD:AAC1104). No unique fixed substitutions distinguish L. pictum from all other western red-tailed L. ( Dialictus ).

Remarks

Gibbs (2011) recorded Lasioglossum pictum as far southwest as Alberta and Nebraska. Additional specimens are now known from Colorado and Arizona. Lasioglossum arenisaltans sp. nov. is also known from these same localities. Both species are sand dune specialists and seem to occur sympatrically throughout much of their range, although L. arenisaltans sp. nov. is more common in the southwest and L. pictum is more common in the northeast.

The type locality of L. pictum is within the known range of L. arenisaltans sp. nov., but all 14 syntype specimens were examined and found to represent L. pictum as traditionally understood.

SWPP

SWPP

CSUC

USA, Colorado, Fort Collins, Colorado State University

UCMC

USA, Colorado, Boulder, University of Colorado Museum

AMNH

USA, New York, New York, American Museum of Natural History

NCSU

USA, Raleigh, North Carolina, North Carolina State University Insect Collection

UMSP

USA, Minnesota, St. Paul, University of Minnesota

EMEC

USA, California, Berkeley, University of California, Essig Museum of Entomology

USNM

USA, Washington D.C., National Museum of Natural History, [formerly, United States National Museum]

UNSM

University of Nebraska State Museum

SEMC

University of Kansas - Biodiversity Institute

UCMC

University of Colorado Museum

UMSP

University of Minnesota Insect Collection

USNM

Smithsonian Institution, National Museum of Natural History

Kingdom

Animalia

Phylum

Arthropoda

Class

Insecta

Order

Hymenoptera

Family

Halictidae

Genus

Lasioglossum

Loc

Lasioglossum (Dialictus) pictum ( Crawford, 1902 )

Gardner, Joel & Gibbs, Jason 2020
2020
Loc

Lasioglossum (Dialictus) graenicheri

Krombein K. V. 1967: 463
1967
Loc

Lasioglossum (Dialictus) muskegoense

Krombein K. V. 1967: 464
1967
Loc

Lasioglossum (Dialictus) pictum

Gibbs J. & Ascher J. S. & Rightmyer M. G. & Isaacs R. 2017: 84
Scott V. L. & Ascher J. S. & Griswold T. L. & Nufio C. R. 2011: 31
Gibbs J. 2010: 249
Wolf A. T. & Ascher J. S. 2009: 144
Krombein K. V. 1967: 465
1967
Loc

Dialictus muskegoensis

Mitchell T. B. 1960: 439
1960
Loc

Dialictus pictus

Moure J. S. & Hurd P. D. 1987: 122
Hurd P. D. 1979: 1970
Knerer G. & Atwood C. E. 1962: 170
Mitchell T. B. 1960: 412
1960
Loc

Lasioglossum (Chloralictus) graenicheri

Michener C. D. 1951: 1113
1951
Loc

Lasioglossum (Chloralictus) pictum

Michener C. D. 1951: 1116
1951
Loc

Halictus (Chloralictus) pictus

Sandhouse G. A. 1924: 3
1924
Loc

Halictus (Chloralictus) graenicheri

Sandhouse G. A. 1924: 4
1924
Loc

Halictus graenicheri

Ellis M. D. 1914: 221
1914
Loc

Halictus pictus

Crawford J. C. 1902: 236
1902