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

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

persistent identifier

http://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 74View Fig, 90LView Fig, 102AView Fig, 105AView 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, 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. 116AView 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; UNSMGoogleMaps  1 ♀; same location as for preceding; 3 Jun. 1901; M. Cary leg.; ex Symphoricarpos  ; UNSMGoogleMaps  6 ♀♀; same location as for preceding; 23 Jun. 1901; J.C. Crawford leg.; ex wild rose; UNSMGoogleMaps  3 ♀♀; Crawford ; [42.68° N, 103.41° W]; 29 Jul. 1901; M.A. Carriker leg.; ex Mentzelia  ; UNSMGoogleMaps  .

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  – ManitobaGoogleMaps  2 ♀♀; Spirit Sands , SWPP (stabilized dune); 49.664° N, 99.2951° W; 30 May 2019; T.M. Onuferko leg.; CMNC. – OntarioGoogleMaps  1 ♀; Norfolk Co., South Walsingham , Pterophylla Farm ; [42.66° N, 80.52° W]; P.J. Carson leg.; WRME. – SaskatchewanGoogleMaps  2 ♀♀; 6.4 km NNW of Webb (active dune); 50.2341° N, 108.2403° W; 1 Jun. 2019; T.M. Onuferko leg.; CMNCGoogleMaps  1 ♀; 7.6 km NNW of Webb (active dune); 50.2431° N, 108.2503° W; 1 Jun. 2019; T.M. Onuferko leg.; CMNCGoogleMaps  5 ♀♀; N Bitter Lake, Tunstall (stabilizing dune); 50.1489° N, 109.8244° W; 2 Jun. 2019; T.M. Onuferko leg.; CMNCGoogleMaps  .

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.; SEMCGoogleMaps  . – 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.; CSUCGoogleMaps  1 ♀; Alamosa Co., Sand Dunes National Monument ; [37.8° N, 105.6° W]; 21 Jun. 1955; Hugo G. Rodeck leg.; UCMCGoogleMaps  1 ♀; White Rocks, near Boulder; [40.06° N, 105.16° W]; 1676 m a.s.l.; 5 Jun. 1922; AMNHGoogleMaps  1 ♀; Wray ; 40° N, 102.1667° W; 1128 m a.s.l.; 17–19 Aug. 1919; AMNHGoogleMaps  . – Kansas • 1 ♀; 9 mi S of Garden City ; [37.84° N, 100.87° W]; 12 Jun. 1952; Wille and Michener leg.; ex Melilotus officinalis  ; SEMCGoogleMaps  . – Michigan • 2 ♂♂; Berrien Co., Warren Dunes S.P. ; 41.903° N, 86.604° W; 6 Jul. 2014; J. Gibbs leg.; WRMEGoogleMaps  1 ♂; Muskegon Co.; [43.3° N, 86.2° W]; 2 Aug. 1944; Dreisbach leg.; NCSUGoogleMaps  . – 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.; UMSPGoogleMaps  1 ♀; same location as for preceding; 20 Jul. 2015; J. Gardner leg.; UMSPGoogleMaps  6 ♀♀; Anoka Co., Bunker Hills Reg. Park ; 45.2105° N, 93.2877° W; 274 m a.s.l.; 8 Jun. 2015; J. Gardner leg.; UMSPGoogleMaps  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  ; UMSPGoogleMaps  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  ; UMSPGoogleMaps  2 ♀♀; Anoka Co., Bunker Hills Reg. Park ; 45.2176° N, 93.2899° W; 274 m a.s.l.; 20 Jul. 2015; J. Gardner leg.; UMSPGoogleMaps  2 ♀♀; same location as for preceding; 10 Aug. 2015; J. Gardner leg.; UMSPGoogleMaps  2 ♀♀; same location as for preceding; 19 May 2016; J. Gardner leg.; UMSPGoogleMaps  7 ♀♀; same location as for preceding; 8 Jun. 2016; E. Evans leg.; UMSPGoogleMaps  1 ♀; Anoka Co., Bunker Hills Reg. Park ; 45.2176° N, 93.2898° W; 8 Jun. 2015; J. Gardner leg.; ex Tradescantia occidentalis  ; UMSPGoogleMaps  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  ; UMSPGoogleMaps  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.; UMSPGoogleMaps  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  ; UMSPGoogleMaps  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.; UMSPGoogleMaps  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.; UMSPGoogleMaps  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.; UMSPGoogleMaps  1 ♀; same location as for preceding; 12 Aug. 2015; J. Gardner leg.; UMSPGoogleMaps  1 ♀; same location as for preceding; 31 Aug. 2015; J. Gardner leg.; UMSPGoogleMaps  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  ; UMSPGoogleMaps  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.; UMSPGoogleMaps  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  ; UMSPGoogleMaps  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.; UMSPGoogleMaps  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.; UMSPGoogleMaps  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  ; UMSPGoogleMaps  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  ; UMSPGoogleMaps  . – Nebraska • 4 ♀♀; McPherson Co., Sandhills Ag Lab ; [41.62° N, 100.83° W]; 15 Jul. 1972; UNSMGoogleMaps  4 ♀♀; same location as for preceding; 28 Jun.–10 Aug. 1972; UNSMGoogleMaps  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  ; UNSMGoogleMaps  2 ♂♂; 3 mi. S of Hyannis; [41.96° N, 101.76° W]; 12 Sep. 1961; Crew leg.; ex misc. vegetation; UNSMGoogleMaps  1 ♂; same location as for preceding; 10 Sep. 1961; Atyeo and Isakson leg.; ex dry prairie; UNSMGoogleMaps  1 ♀; 3.5 mi. W of Marquette; [41.01° N, 98.08° W]; 31 Jul. 1958; Atyeo and Andresen leg.; UNSMGoogleMaps  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  ; UNSMGoogleMaps  1 ♀; same location as for preceding; 3 Sep. 1959; W.E. LaBerge leg.; ex Solidago  ; UNSMGoogleMaps  1 ♀; Mitchell ; [41.94° N, 103.81° W]; 2 Aug. 1917; E.J. Yates leg.; ex Melilotus officinalis subsp. alba  ; UNSMGoogleMaps  1 ♀; Smith Lake , 20 mi. S of Rushville; [42.42° N, 102.45° W]; 31 Aug. 1959; ex Helianthus petiolaris  ; UNSMGoogleMaps  1 ♀; same location as for preceding; 31 Aug. 1959; W.E. LaBerge leg.; ex Erigeron  ; UNSMGoogleMaps  3 ♀♀; West Point ; [41.84° N, 96.71° W]; Jun. 1900; UNSMGoogleMaps  . – North Dakota • 22 ♀♀; Ransom Co., 7 mi. SE of Sheldon ; [46.52° N, 97.39° W]; 24 Sep. 1983; J.R. Powers leg.; EMECGoogleMaps  11 ♀♀; Richland Co., 1 mi. SE of McLeod; [46.38° N, 97.28° W]; 8 Jun. 1991; J.R. Powers leg.; EMECGoogleMaps  2 ♀♀; same location as for preceding; 2 Aug. 1995; J.R. Powers leg.; EMECGoogleMaps  . – Wisconsin • 1 ♀; Vernon Co., Genoa ; [43.58° N, 91.22° W]; 13 Jul. 1911; Graenicher leg.; USNMGoogleMaps  .

Description

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

Range

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