Revision of the metallic species of Lasioglossum (Dialictus) in Canada (Hymenoptera, Halictidae, Halictini) 2591
Gibbs, Jason
Zootaxa
2010
2010-08-31
2591
1
1
382
Gibbs
Gibbs
2010
[151,634,1823,1849]
Insecta
Halictidae
Lasioglossum
Animalia
Hymenoptera
229
230
Arthropoda
species
packeri
sp. nov.
Dialictus
( Figures 167A–D, 168A–F)
Holotype. ♀ CANADA, Saskatchewan, Grassland National Park, prairie, N49.0711 W106.52935, 830 m, 4.vi.2007( Goulet, Boudreault& Fernandez); [ PCYU].
Diagnosis.Females of L. packerican be recognised by the diagnostic combination of a small size (4.0– 4.4 mm), wide head (length/width ratio = 0.90–0.95), distinctly separated punctures on the frons (i=1–1.5d), very wide gena nearly 1.5 times wider than eye with widest point at midlength of eye ( Fig. 167D), parallel hypostomal carinae, highly polished mesosoma due to lack of microsculpture, finely punctate mesepisternum distinct metatibial scopa, short basal rugae on metapostnotum that reach less than half way to posterior margin and brown metasoma with dense punctures on the dorsal surface of T1. They are similar to L. pallidellumand the southern USAspecies L. semibrunneum(Cockerell)(= Halictus oleosusCockerell new synonymy). Female L. pallidellumhave the gena narrower than the eye. Female L. semibrunneumhave the gena narrower except some large specimens with a distinct tubercle located below the midlength of they eye and sparse punctures on the dorsal surface of T1. Males of L. packerican be recognised by the diagnostic combination of small size ( 3.4–4.1 mm), abundant facial tomentum, short flagellomeres (length/width ratio = 1.00–1.25) that are bright yellow ventrally, acute dorsolateral angle of the pronotum, distinct mesepisternal punctures and short rugae on the metapostnotum reaching only halfway to the posterior margin. FEMALE. Length 3.97–4.39 mm; head length 1.27–1.44 mm; head width 1.34–1.61 mm; forewing length 3.05–3.23 mm. Colouration.Head and mesosoma bluish green with golden reflections. Labrum reddish to orange-yellow. Mandible orange-yellow. Clypeus with apical half blackish brown. Antenna dark brown, F2–F10 with ventral surface orange-yellow. Tegula translucent amber. Wing membrane subhyaline, venation and pterostigma pale yellow. Legs brown, medio- and distitarsi reddish brown. Metasoma dark brown, terga and sterna with apical margins translucent brownish yellow. Pubescence.Dull white to white. Moderately dense. Head and mesosoma with moderately dense woolly hairs (1–1.5 OD), longest on genal beard, metanotum and mesopleuron (2–2.5 OD). Lower paraocular area and gena with abundant tomentum. Propodeum with moderately dense plumose hairs on lateral and posterior surfaces (2–2.5 OD). Metasomal terga with abundant setae. T1 acarinarial fan complete dorsally. T1 basolaterally and T3–T5 entirely with sparse tomentum. T2 apicolateral and T3–T4 apical margins with sparse fringes. Surface sculpture.Face polished, punctation fine, deep. Clypeal punctation sparse (i=1–6d). Supraclypeal area with punctation moderately sparse (i=1–3d). Lower paraocular area punctation dense (i=d). Antennocular area punctation moderately dense (i=1–1.5d). Upper paraocular area and frons punctation distinctly separated (i=1–1.5d). Ocellocular area minutely punctate (i=d). Gena polished. Postgena imbricate. Mesoscutum polished, punctation sparse between parapsidal lines (i=1–5d), closer laterad of parapsidal lines and on anterolateral portion of disc (i=1–1.5d). Mesoscutellum polished, virtually impunctate. Axilla punctate. Metanotum distinctly minutely punctate (i≤d). Preëpisternum obscurely punctate (i≤d). Hypoepimeral area and mesepisternum polished, distinctly and finely punctate (i=1–1.5d). Metepisternum with dorsal third weakly rugulose and ventral portion imbricate. Metapostnotum basal half weakly rugoso-striate, apical half polished. Propodeum with dorsolateral slope weakly imbricate, lateral and posterior surfaces tessellate. Metasomal terga coriarious, punctation very fine and obscure throughout (i=1–2d). Structure.Head wide (length/width ratio = 0.90–0.95). Eyes weakly convergent below (UOD/LOD ratio = 1.06–1.08). Clypeus 2/3 below suborbital tangent, apicolateral margins very strongly convergent. Antennal sockets close (IAD/OAD> 0.6). Frontal line carinate, ending 1 OD below median ocellus. Gena at midlength approximately 1.5 times as wide as eye. Pronotum with dorsolateral angle orthogonal. Metatibial spur with 3 teeth. Metapostnotum moderately elongate (MMR ratio = 1.28–1.44), posterior margin rounded onto posterior surface. Propodeum with oblique carina absent, lateral carina weak, not reaching dorsal margin. MALE. Similar to female except for the usual secondary sexual characters and as follows. Length 3.36– 4.09 mm; head length 1.08 mm; head width 1.14 mm; forewing length 2.26–2.50 mm. Colouration.Labrum brownish yellow. Mandible yellow, apex red, base blackish brown. Flagellum with ventral surface yellow. Tibial bases and apices, and tarsi pale brownish yellow. Pubescence. Face below ocelli with dense tomentum obscuring surface. Clypeus with moderately sparse tomentum partially obscuring surface. Gena with moderately dense tomentum partially obscuring surface. S2– S4 with dense plumose hairs (1.5–2 OD). Surface sculpture. Clypeal punctation relatively dense (i=1–2d). Metasomal terga with distinct punctation throughout (i=1–2d). Structure.Head wide (length/width ratio = 0.95). Eyes strongly convergent below (UOD/LOD ratio = 1.28). Clypeus 1/2 below suborbital tangent, apicolateral margins convergent. Antennal sockets distant (IAD/ OAD> 1.1). Frontal line carinate, ending 1.5 OD below median ocellus. Pedicel longer than or subequal to F1. F2 length 1.4–1.5X F1. F2–F10 short (length/width ratio = 1.00–1.25). Gena narrower than eye. Metapostnotum elongate (MMR ratio = 1.05–1.25), posterior margin broadly rounded onto posterior surface. Terminalia. Genitalia as in Fig. 168D–F. Gonostylus small, dorsal setae elongate. Retrorse lobe narrow, strongly attenuated apically. FIGURE 168. Lasioglossum packeri new species. Male (A) lateral habitus; (B) dorsal habitus; (C) face; (D) ventral view of genital capsule; (E) dorsal view of genital capsule; (F) apical view of genital capsule. Scale bars, A–C = 1 mm, F = 0.5 mm. Range. Saskatchewan, Albertasouth to Colorado( Fig. 165). Allotype. ♂ CANADA: SASKATCHEWAN: Grasslands N.P., N49.1799 W107.40047, 27.vii.1996(A. T. Finnamore); [ PMAE]. Paratypes. CANADA: ALBERTA: 2♀ Cypress Co., 10 kmS Manyberries, Hwy501, N49.26131 W110.59052, 948 m, 13.vi.2007( Gibbs& Sheffield); [ PCYU]; 1♀Writing-On-Stone P.P., Grass-north, 17– 26.iv.1990( D. McCorquodale); [ PMAE]; SASKATCHEWAN: 1♀topotypical; 1♀ 18 kmS of Maple Creek, 3000ft., 16.vii.2005(J. R. Vockeroth); [ PCYU]; 1♀ Grasslands N.P., N49.1791 W107.40721, 2.vii.1996(A. T. Finnamore); 1♀ Grasslands N.P., N49.179997 W107.40047, 2.vii.1996(A. T. Finnamore); 1♀ Grasslands N.P., N49.1316 W107.59919, 13.vii.1996(A. T. Finnamore); 1♀ Grasslands N.P., N49.1791 W107.40721, 14.vii.1996(A. T. Finnamore); 1♀ Grasslands N.P., N49.17997 W107.40047, 14.vii.1996(A. T. Finnamore); 1♀ Grasslands N.P., N49.1799 W107.40047, 23.vii.1996(A. T. Finnamore); 1♀ Grasslands N.P., N49.1791 W107.40721, 23.vii.1996(A. T. Finnamore); 2♀ Grasslands N.P., N49.1432 W107.44675, 23.vii.1996(A. T. Finnamore); 1♀ Grasslands N.P., N49.1791 W107.40721, 27.vii.1996(A. T. Finnamore); 2♀ Grasslands N.P., N49.1799 W107.40047, 27.vii.1996(A. T. Finnamore); 1♀ Grasslands N.P., N49.1903 W107.37732, 28.vii.1996(A. T. Finnamore); [ PMAE]; MANITOBA: 1♀ Russell, 21.vii.1954( Brooks& Wallis); [ CNC]; USA: COLORADO: 1♀( H. oleosushomotype) Logan Co., Sterling, 18.vi.1923( G. Sandhouse); 1♀( H. oleosushomotype) Logan Co., Sterling, 28.vi.1923( G. Sandhouse); [ ANSP]; 1♀ Logan Co., Sterling, 18.vi.1923( G. Sandhouse); [ CNC]; SOUTH DAKOTA: 1♀ Badlands National Park, 20.viii.2008; 3♀ 2♂♂ Badlands National Park, 4.ix.2008; [ BLNP].
Etymology.It is a pleasure to name this species for Laurence Packer for his studies of Halictine sociobiology and in gratitude for supervising my doctoral research.
Comments.Uncommon.
2007-06-04
PCYU
Goulet & Boudreault & Fernandez
Canada
830
49.0711
Grassland National Park
5
-106.52935
229
230
1
1
Saskatchewan
holotype
1996-07-27
T, PMAE
Grasslands N. P.
Canada
49.1799
SASKATCHEWAN
5
-107.40047
233
234
1
1
Saskatchewan
allotype
2007-06-13
PCYU
Gibbs & Sheffield
Canada
Cypress Co.
948
49.26131
Hwy
1
-110.59052
233
234
2
2
Alberta
paratype
1990-04-17
1990-04-26
1990-04-17
PMAE
J.P. Pitts & D. McCorquodale
Canada
Grass-north
233
234
1
1
Alberta
paratype
[648,1079,352,378]
Canada
SASKATCHEWAN
233
234
1
1
Saskatchewan
paratype
2005-07-16
R, PCYU
Vockeroth
Canada
914
18 km S of Maple Creek
233
234
1
1
Saskatchewan
paratype
1996-07-02
T
Grasslands N. P. & Finnamore
Canada
49.1791
5
-107.40721
233
234
1
1
Saskatchewan
paratype
[309,1243,432,458]
1996-07-02
T
Grasslands N. P. & Finnamore
Canada
49.179996
1
-107.40047
233
234
1
1
Saskatchewan
paratype
1996-07-13
T
Grasslands N. P. & Finnamore
Canada
49.1316
5
-107.59919
233
234
1
1
Saskatchewan
paratype
1996-07-14
T
Grasslands N. P. & Finnamore
Canada
49.1791
5
-107.40721
233
234
1
1
Saskatchewan
paratype
[519,1432,512,538]
1996-07-14
T
Grasslands N. P. & Finnamore
Canada
49.17997
1
-107.40047
233
234
1
1
Saskatchewan
paratype
[151,1054,552,578]
1996-07-23
T
Grasslands N. P. & Finnamore
Canada
49.1799
5
-107.40047
233
234
1
1
Saskatchewan
paratype
1996-07-23
T
Grasslands N. P. & Finnamore
Canada
49.1791
5
-107.40721
233
234
1
1
Saskatchewan
paratype
1996-07-23
T
Grasslands N. P. & Finnamore
Canada
49.1432
5
-107.44675
233
234
2
2
Saskatchewan
paratype
[308,1224,632,658]
1996-07-27
T
Grasslands N. P. & Finnamore
Canada
49.1791
5
-107.40721
233
234
1
1
Saskatchewan
paratype
1996-07-27
T
Grasslands N. P. & Finnamore
Canada
49.1799
5
-107.40047
233
234
2
2
Saskatchewan
paratype
1996-07-28
T, PMAE
Grasslands N. P. & Finnamore
Canada
49.1903
5
-107.37732
233
234
1
1
Saskatchewan
paratype
[640,1431,712,738]
1954-07-21
CNC
Brooks & Wallis
Canada
Russell
233
234
1
1
Manitoba
paratype
[151,1277,751,778]
1923-06-18
G. Sandhouse
United States of America
Logan Co.
Sterling
233
234
1
1
Colorado
paratype
1923-06-28
ANSP
G. Sandhouse
United States of America
Logan Co.
Sterling
233
234
1
1
Colorado
paratype
1923-06-18
CNC
G. Sandhouse
United States of America
Logan Co.
Sterling
233
234
1
1
Colorado
paratype
[450,1192,832,858]
2008-08-20
United States of America
Badlands National Park
233
234
1
1
South Dakota
paratype
2008-09-04
BLNP
United States of America
Badlands National Park
233
234
5
3
2
South Dakota
paratype