Lasioglossum (Dialictus) testaceum ( Robertson, 1897 )

Gardner, Joel & Gibbs, Jason, 2020, The ‘ red-tailed’ Lasioglossum (Dialictus) (Hymenoptera: Halictidae) of the western Nearctic, European Journal of Taxonomy 725, pp. 1-242: 192-195

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.4337932

persistent identifier

http://treatment.plazi.org/id/03F287F3-21F2-FF24-8AD5-FA5631FDFD2F

treatment provided by

Plazi

scientific name

Lasioglossum (Dialictus) testaceum ( Robertson, 1897 )
status

 

Lasioglossum (Dialictus) testaceum ( Robertson, 1897)  

Figs 84 View Fig , 90O View Fig , 96A View Fig , 98A View Fig

Halictus testaceus Robertson, 1897: 323   (lectotype designated by W.E. LaBerge in Webb 1980, ♀, deposited in INHS, examined).

Halictus (Chloralictus) scrophulariae Cockerell, 1906: 428   (holotype, ♀, deposited in USNM, examined; synonymy by Gibbs 2011).

Halictus (Chloralictus) occultus Sandhouse, 1924: 27   (holotype, ♂, deposited in USNM, examined; name preoccupied due to primary homonymy with Halictus occultus Vachal, 1904   ).

Lasioglossum (Chloralictus) sandhouseae Michener, 1951: 1117   (catalog, replacement name for H. (C.) occultus Sandhouse, 1924   ; synonymy by Gibbs 2011).

Chloralictus testaceus   – Robertson 1902 b: 249 (key).

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

Lasioglossum (Chloralictus) scrophulariae   – Michener 1951: 1117 (catalog).

Lasioglossum (Chloralictus) testaceum   – Michener 1951: 1118 (catalog).

Dialictus sandhouseae   – Mitchell 1960: 418, fig. 102 (key, redescription). — Hurd 1979: 1971 (catalog). — Moure & Hurd 1987: 129 (catalog).

Dialictus testaceus   – Mitchell 1960: 424 (key, redescription). — Hurd 1979: 1972 (catalog). — Moure & Hurd 1987: 135 (catalog).

Dialictus scrophulariae   – Hurd 1979: 1971 (catalog). — Moure & Hurd 1987: 129 (catalog).

Lasioglossum (Dialictus) sandhouseae   – Krombein 1967: 466 (catalogue).

Lasioglossum testaceum   – Donovall & van Engeldorp 2010: 18 (checklist).

Lasioglossum (Evylaeus) testaceum   – Gibbs 2010: 42, fig. 9b (key). — Scott et al. 2011: 32 (checklist).

Lasioglossum (Dialictus) testaceum   – Wolf & Ascher 2009: 144 (checklist). — Gibbs 2011: 197 View Cited Treatment , figs 213–217 (key, redescription).

Diagnosis

Females of Lasioglossum testaceum   are readily identified by the propodeum with strong dorsoventral and oblique carinae, and T1 with sparse erect hairs and no acarinarial fan. This combination is unique among Nearctic L. ( Dialictus   ) except for L. rufulipes (Cockerell, 1938)   , which has a dark metasoma, T4 with sparser tomentum, and a boreal distribution, and L. aquilae   , which has the metasoma dark metallic green.

Males of L. testaceum   can be recognized by the face short (length/width ratio ~0.81), clypeus apical half pale yellow, propodeum dorsolateral slope and posterior face rugose, propodeum lateral face smooth and tessellate, and retrorse lobe very narrow. They are most similar to L. zephyrus   and L. pictum   . Both of these species have the clypeus apical margin dark or much more narrowly yellow, retrorse lobes much broader, and face slightly longer. In addition, males of L. pictum   have the scutum and mesepisternum with larger and denser punctures (i=1–2 pd) and propodeum lateral face rugulose.

Etymology

Robertson (1897) named this species with the Latin adjective ‘ testaceus   ’ (brick-like).

Material examined

Lectotype

UNITED STATES – Illinois • ♀; Macoupin Co., Carlinville ; [39.28° N, 89.88° W]; 11 Apr. 1896; C. Robertson leg.; INHS. GoogleMaps  

Other material

CANADA – Alberta   • 1 ♀; Writing-On-Stone Prov. Pk.; [49.09° N, 111.62° W]; 26 May–6 Jun. 1990; D. McCorquodale leg.; WRME. GoogleMaps   – British Columbia • 1 ♂; 5 mi. S of Hedley; [49.29° N, 120.04° W]; 24 Jul. 1985; Finnamore and Thormin leg.; PMAE GoogleMaps   .

UNITED STATES – Colorado • 2 ♀♀; Alamosa Co., 4 mi. SW of Alamosa (intersection 370 and S106); 37.42738° N, 105.92846° W; 2301 m a.s.l.; 25 May 2001; Va. Scott leg.; ex Salix   (staminate); UCMC GoogleMaps   1 ♀; El Paso Co., Ramah ; [39.12° N, 104.17° W]; 15 Jun. 1971; Michener and Schorr leg.; ex Salix   sp.; SEMC GoogleMaps   1 ♀; same location as for preceding; 15 Jun. 1971; C. Michener and R. Schorr leg.; ex Salix   ; SEMC GoogleMaps   2 ♀♀; Fremont Co., 5 mi. SW of Coaldale ; [38.31° N, 105.82° W]; 10 Jun. 1971; C. Michener and R. Schorr leg.; ex Salix   ; SEMC GoogleMaps   1 ♀; same location as for preceding; 10 Jun. 1971; C. Michener and R. Schorr leg.; ex Rhus trilobata   ; SEMC GoogleMaps   2 ♀♀; Fremont Co., Coaldale ; [38.37° N, 105.76° W]; 11 Jun. 1971; C. Michener and R. Schorr leg.; ex Salix   ; SEMC GoogleMaps   1 ♀; Jackson Co., Lake John ; 40.7862° N, 106.4692° W; 2461 m a.s.l.; 27 Jun. 2014; T. McIntyre and F.D. Parker leg.; BBSL GoogleMaps   1 ♀; Park Co., N. Fk. S. Platte R., 0.2 mi. E of Bailey; [39.404° N, 105.47° W]; 11 Jun. 1988; E. Bergey leg.; CSUC GoogleMaps   1 ♂; Routt Co., 4 mi. E of Clark; [40.71° N, 106.84° W]; 29 Aug. 1979; U.N. Lanham leg.; ex Solidago   ; UCMC GoogleMaps   1 ♀; Teller Co., S base of Blue Mtn., nr Florissant ; [38.923° N, 105.327° W]; 2568 m a.s.l.; 1 Aug. 1966; T. Emmel and M. Fosdick leg.; LACM GoogleMaps   1 ♀; Weld Co., 2–4 mi. W of Orchard; [40.33° N, 104.18° W]; 14 May 1992; M.G. Galindo and R.S. Beal leg.; ex Salix   ; CSUC GoogleMaps   3 ♂♂; 8 mi. NW of Steamboat Spgs.; [40.57° N, 106.94° W]; 28 Aug. 1979; U.N. Lanham leg.; ex Solidago   ; UCMC GoogleMaps   3 ♀♀; 9 mi. N of Arboles; [37.15° N, 107.36° W]; 27 May 1977; U. Lanham and P. Byron leg.; ex Salix   ; UCMC GoogleMaps   1 ♂; Florissant ; [38.95° N, 105.29° W]; 23 Jul. year unknown; Cockerell leg.; ex Potentilla   ; USNM GoogleMaps   1 ♀; same location as for preceding; 25 Jul. year unknown; Cockerell leg.; ex Scrophularia   ; USNM GoogleMaps   . – Minnesota • 1 ♀; 43.7509° N, 91.6541° W; 20 Jun. 2014; S. Leddy leg.; ex Rudbeckia triloba   ; WRME GoogleMaps   . – Utah • 1 ♀; Uintah Co., Bonanza ; [40.02° N, 109.18° W]; Jul. 1977; G. Bohart leg.; BBSL GoogleMaps   . – Wyoming • 1 ♀; Lincoln Co., Salt Creek ; 42.4667° N, 110.9678° W; 2027 m a.s.l.; 14 Aug. 2014; J.B. Runyon leg.; MTEC GoogleMaps   .

Description

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

Range

Rocky Mountains from British Columbia southeast to New Mexico, east through the Great Plains to Illinois ( Fig. 84 View Fig ).

Floral records

ANACARDIACEAE R.Br.   Rhus   L. R. trilobata Nutt.   APOCYNACEAE Juss.   Asclepias   L. A. speciosa Torr.   (G11) • ASTERACEAE Giseke   : Anaphalis   (G11) • Nothocalais   : N. cuspidata (Pursh) Greene   (G11) • Rudbeckia   : R. triloba   L. • Solidago   Taraxacum   (G11) • FABACEAE Juss.   Amorpha   : A. canescens Pursh   (G11) • GROSSULARIACEAE DC.   Ribes   L. R. valicola Greene   (G11) • ONAGRACEAE Juss.   Epilobium   L. (G11) • POLYGONACEAE Juss.   Eriogonum Michx.   E. annuum Nutt.   (G11) • ROSACEAE Juss.   Dasiphora Raf.   D. fruticosa   (L.) Rydb. (G11) • Potentilla   L. • Prunus   L. (G11) • Spiraea   L. (G11) • SALICACEAE Mirb.   Salix   L. S. brachycarpa Nutt.   (G11) • S. eriocephala Michx.   (G11) • SCROPHULARIACEAE Juss.   Scrophularia   L.

DNA barcodes

Not available. Lasioglosusm testaceum   is morphologically similar to L. rufulipes   , for which 3 sequences are available (BOLD process IDs: DLII1138-08, DLII1140-08, DLII1142-08). Barcodes of L. testaceum   are expected to be similar to those of L. rufulipes   , as these are very likely sister species. Phylogenetic analysis of COI barcodes and other genes of L. rufulipes   suggest it is a distinct lineage relatively distantly related from the major clade of New World L. ( Dialictus   ) ( Gibbs et al. 2012b; Fig. 7 View Fig ).

PMAE

Canada, Alberta, Edmonton, Royal Alberta Museum

SEMC

USA, Kansas, Lawrence, University of Kansas, Snow Entomological Museum

BBSL

BBSL

CSUC

USA, Colorado, Fort Collins, Colorado State University

LACM

USA, California, Los Angeles, Los Angeles County Museum of Natural History

USNM

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

MTEC

USA, Montana, Bozeman, Montana State University

UCMC

University of Colorado Museum

SEMC

University of Kansas - Biodiversity Institute

USNM

Smithsonian Institution, National Museum of Natural History

Kingdom

Animalia

Phylum

Arthropoda

Class

Insecta

Order

Hymenoptera

Family

Halictidae

Genus

Lasioglossum

Loc

Lasioglossum (Dialictus) testaceum ( Robertson, 1897 )

Gardner, Joel & Gibbs, Jason 2020
2020
Loc

Lasioglossum (Evylaeus) testaceum

Scott V. L. & Ascher J. S. & Griswold T. L. & Nufio C. R. 2011: 32
Gibbs J. 2010: 42
2010
Loc

Lasioglossum (Dialictus) testaceum

Gibbs J. 2011: 197
Wolf A. T. & Ascher J. S. 2009: 144
2009
Loc

Dialictus scrophulariae

Moure J. S. & Hurd P. D. 1987: 129
Hurd P. D. 1979: 1971
1979
Loc

Lasioglossum (Dialictus) sandhouseae

Krombein K. V. 1967: 466
1967
Loc

Dialictus sandhouseae

Moure J. S. & Hurd P. D. 1987: 129
Hurd P. D. 1979: 1971
Mitchell T. B. 1960: 418
1960
Loc

Dialictus testaceus

Moure J. S. & Hurd P. D. 1987: 135
Hurd P. D. 1979: 1972
Mitchell T. B. 1960: 424
1960
Loc

Lasioglossum (Chloralictus) sandhouseae

Michener C. D. 1951: 1117
1951
Loc

Lasioglossum (Chloralictus) scrophulariae

Michener C. D. 1951: 1117
1951
Loc

Lasioglossum (Chloralictus) testaceum

Michener C. D. 1951: 1118
1951
Loc

Halictus (Chloralictus) occultus

Sandhouse G. A. 1924: 27
1924
Loc

Halictus (Chloralictus) scrophulariae

Sandhouse G. A. 1924: 4
1924
Loc

Halictus (Chloralictus) scrophulariae

Cockerell T. D. A. 1906: 428
1906
Loc

Halictus testaceus

Robertson C. 1897: 323
1897
Loc

Chloralictus testaceus

Chloralictus testaceus – Robertson 1902 b: 249