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Lasioglossum knereri Gibbs, 2010
Life   Insecta   Hymenoptera   Apoidea   Halictidae   Lasioglossum
Subgenus: Dialictus



Lasioglossum knereri CFP MALE comp
© Copyright Laurence Packer 2014 · 7
Lasioglossum knereri CFP MALE comp

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Lasioglossum knereri FEM mm x f
© Copyright Laurence Packer 2014 · 7
Lasioglossum knereri FEM mm x f

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Retrieved from: Gibbs, J. 2010. Revision of the metallic species of Lasioglossum (Dialictus)in Canada (Hymenoptera, Halictidae, Halictini). Zootaxa; 2591, 166-170


Holotype. ♀ CANADA, British Columbia, 1♀ Richmond, N49°08΄41΄΄ W123°04΄24΄΄ 14.v.2003 (C. Ratti); [PCYU].


Diagnosis. Females of L. knereri can be recognised by the diagnostic combination of a wide head (length/

width ratio = 0.92–0.96), polished mesoscutum due to weak microsculpture with moderately dense punctures

on centre of disc (i=0.5–1.5d), distinct but irregular mesepisternal punctures, weak longitudinal rugae on the

metapostnotum not reaching rounded posterior margin, and brown metasomal terga with sparse tomentum and

very obscure apical punctures. They are most similar to L. subversans and L. foveolatum. Female L. subversans

have the mesoscutum dull due to microsculpture. Female L. foveolatum have a strongly convex supraclypeal

area and very strong parapsidal lines.



Males of L. knereri and L. subversans can be distinguished from all other Canadian Dialictus by the very

long and dense scopa-like hairs on S2–S3 and apicolateral portions of S4–S5. They may be distinguished by

the apical impressed areas of the metasomal terga which are distinctly punctate in L. knereri but impunctate in

L. subversans.



Description. FEMALE. Length 5.55–6.22 mm, head length 1.39–1.66 mm, head width 1.45–1.75 mm,

forewing length 3.48–4.27 mm.



Colouration. Head and mesosoma golden green with blue reflections to blue with green reflections.

Clypeus with apical half blackish brown and basal half and supraclypeal golden to bronze. Antenna dark

brown, F5–F10 with ventral surface yellow-orange to brown. Tegula reddish brown. Wing membrane subhyaline,

venation and pterostigma brownish yellow. Legs brown, medio- and distitarsi reddish brown. Metasoma

dark brown, terga and sterna with apical margins reddish to yellowish brown.



Pubescence. Dull white. Moderately sparse. 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 sparse tomentum not obscuring surface. Propodeum with moderately dense plumose hairs on lateral and

posterior surfaces (2–2.5 OD). Metasomal terga with dense, fine setae. T1 acarinarial fan complete dorsally.

T2–T3 basolaterally and T4 entirely with sparse tomentum. T2 apicolateral and T3–T4 apical margins with

weak fringes.



Surface sculpture. Face imbricate, punctation fine. Clypeus polished, basal margin imbricate, punctation

moderately sparse (i=1–2.5d). Supraclypeal area with punctation moderately dense (i=1–1.5d). Lower paraocular

area punctation dense (i≤1d). Antennocular area punctation moderately dense (i=1–1.5d). Upper paraocular

area, frons and ocellocular area punctate-reticulate. Gena lineolate. Postgena polished, weakly lineolate.

Mesoscutum polished; medial portion imbricate, punctation moderately dense between parapsidal lines

(i=0.5–1.5d), dense laterad of parapsidal lines (i≤d), contiguous on anterolateral portion. Mesoscutellum similar

to mesoscutum, submedial punctation sparse (i=1–4d). Axilla punctate. Metanotum imbricate. Preλpisternum

weakly rugulose. Hypoepimeral area weakly imbricate-punctate. Mesepisternum polished, weakly

rugulose with irregular punctation (i=0.5–1.5d). Metepisternum with dorsal fifth striate, ventral portion imbricate.

Metapostnotum weakly rugoso-striate, posterior portion imbricate. Propodeum with dorsolateral slope

ruguloso-imbricate, lateral and posterior surfaces imbricate-tessellate. Metasomal terga polished except apical

impressed areas weakly coriarious, punctation fine on basal halves moderately dense (i=1–1.5d), moderately

sparse on apical halves (i=1.5–2.5d).



Structure. Head wide (length/width ratio = 0.92–0.96). Eyes convergent below (UOD/LOD ratio = 1.14–

1.22). Clypeus 2/3 below suborbital line, apicolateral margins convergent. Antennal sockets close (IAD/OAD

ratio < 0.5). Gena narrower than eye. Tegula ovoid, slightly elongate. Inner metatibial spur pectinate with

teeth. Metapostnotum moderately elongate (MMR ratio = 1.14–1.23), posterior margin elevated, rounded onto

posterior surface. Propodeum with oblique carina weak, lateral carina weak, nearly reaching dorsal margin.



MALE. Similar to female except for the usual secondary sexual characters and as follows. Length 4.76

mm; head length 1.42 mm; head width 1.46 mm; forewing length 3.51 mm.



Colouration. Flagellum with ventral surface brownish yellow.



Pubescence. Face below eye emargination with dense woolly hairs and tomentum. Clypeus with moderately

sparse tomentum, not obscuring surface. Lower paraocular area with moderately dense tomentum,

obscuring surface. Gena with sparse tomentum. S2–S3 and S4–S5 apicolateral portions with very dense

scopa-like hairs (1.5–2.5 OD). S5 apicomedial portion with dense appressed plumose hairs.



Surface sculpture. Clypeal punctation dense (i≤d). Mesosoma with strong punctures. Metapostnotum

completely rugoso-striate. Propodeum with dorsolateral slope and lateral and posterior surfaces rugulosoimbricate.

Metasomal terga strongly punctate throughout.



Structure. Head moderately wide (length/width ratio = 0.97). Eyes strongly convergent below (UOD/LOD

ratio = 1.08). Antennal sockets distant (IAD/OAD > 1.1). Frontal line carinate, ending 2 OD below median ocellus. IOD less than OOD. Pedicel subequal to F1. F2 length 1.8X F1. F2–F10 moderately short (length/

width ratio = 1.23–1.45). Metapostnotum moderately elongate (MMR ratio = 1.14), posterior margin sharply

angled onto posterior surface.



Terminalia. S7 with median lobe narrowly clavate, sides subparallel, apex rounded (Fig. 131D). S8 with

apicomedial margin weakly convex (Fig. 131D). Genitalia as in Fig. 131D–F. Gonobase with ventral arms

narrowly separated. Gonostylus small, dorsal setae elongate. Retrorse lobes narrow, weakly attenuated apically.



Range. Alberta, British Columbia south to California, Colorado (Fig. 129).



Allotype. 1♂ Mariposa Co., Merced Lk. Tr., 1.9 mi EbyN Bunnell Pt., 11S N4187049 E285074, 2141 m,

12.viii.2004 (R. Maddox & E. Stephens); [BBSL]



Paratypes. CANADA: ALBERTA: 1♀ Waterton Lakes N.P., Cardston Ent., 3–17.viii.2000; 1♀ Waterton

Lakes N.P., Cardston Ent., 6–20.vii.2000; [BDUC]; BRITISH COLUMBIA: 1♀ topotypical 14.v.2003 (C.

Ratti); 1♀ Cowichan Lake Forestry Station, Ministry of Forests, Mesachie Lake, N48°49΄07.9΄΄

W124°08΄05.1΄΄, 27.iv.2005 (E. Elle); 1♀ Cowichan Lake Forestry Station, Ministry of Forests, Mesachie

Lake, N48°49΄07.9΄΄ W124°08΄05.1΄΄, 11.v.2005 (E. Elle); 1♀ Cowichan Lake Forestry Station, Ministry of

Forests, Mesachie Lake, N48°49΄07.9΄΄ W124°08΄05.1΄΄, 28.vi.2005 (E. Elle); 1♀ Highrock (Cairn) Park,

Victoria, Dist. of Esquimalt, N48°26΄08.8΄΄ W123°24΄24.9΄΄, 1.v.2005 (E. Elle); 1♀ Konukson Park, Victoria,

Dist. of Saanich, N48°47΄25.8΄΄ W123°16΄25.4΄΄, 18.iv.2005 (E. Elle); 1♀ Konukson Park, Victoria, Dist. of

Saanich, N48°47΄25.8΄΄ W123°16΄25.4΄΄, 1.v.2005 (E. Elle); 1♀ Surrey, N49°05΄54΄΄ W122°47΄31΄΄ 7.v.2003

(C. Ratti); 1♀ Sooke Potholes P.P., 6 km N Sooke, N48°25΄44.3΄΄ W123°42΄40.9΄΄, 30.v.2005 (E. Elle); 1♀

Stoltz Meadows, 15 km E Lake Cowichan, N48°46΄54΄΄ W123°3΄06.9΄΄, 11.v.2005 (E. Elle); 1♀ Surrey,

N49°05΄54΄΄ W122°47΄31΄΄ 14.v.2003 (C. Ratti); 1♀ Surrey, N49°05΄54΄΄ W122°47΄31΄΄ 26.v.2003 (C.

Ratti); 1♀ Westham Island, N49°05΄18΄΄ W123°09΄50΄΄ 23.iv.2003 (C. Ratti); [PCYU]; 1♀ Blind Bay, near

Sorrento, vi.1987 (C.A. Elsey); [CNC]; USA: CALIFORNIA: 1♀ Mariposa Co., Merced Lk. Tr., 1.9 mi EbyN

Bunnell Pt., 11S N4180202 E285717, 2141 m, 3.vi.2005 (H. Briggs & E. Stephens); 1♀ 2 mi W Andrews

Peak, 11S N4213840 E261572, 2394 m, 2.vii.2005 (E. Stephens & J. Gibbs); 2♀♀ Tuolumne Co., Hodgon

Meadow, 11S N4187049 E248074, 1414 m, 5.vii.2005 (L. Fuerst & H. Briggs); 1♀ Tuolumne Co., Hodgon

Meadow, 11S N4187049 E248074, 1414 m, 3.viii.2005 (H. Briggs & L. Fuerst); [BBSL]; COLORADO: 3♀♀

Jackson Co., N40.6017 W106.0726, 11–12.v.2004 (S.W. Droege); 8♀♀ Larimer Co., N40.6833 W105.3975,

11–12.v.2004 (S.W. Droege); IDAHO: 1♀ Fremont Co., N44.39329 W111.38278, 2032 m, 23.vi.2007 (Gibbs

& Sheffield); 1♀ Valley Co., nr Smiths Ferry, Hwy 55, N44.29777 W116.08869, 28.v.2007 (Gibbs & Sheffield);

OREGON: 1♀ Douglas Co., N43.2143 W123.3768, 13.viii.2005 (E. Soderhlom); [PCYU]; WASHINGTON:

1♀ Okanagan Co., 1 mi E Muckamuck Hill, 11U N5386867 E296155, 4.vii.2004 (J. Wilson & L.

Wilson); [BBSL].



Etymology. The specific epithet is dedicated to Gerd Knerer for his studies of halictine bees and descriptions

of Canadian Dialictus.



Floral records. CAMPANULACEAE: Campanula rotundifolia.



Comments. Common. This species seems to exhibit some phylogeographic structure in the DNA barcode

sequences. Five possible haplotypes were found, one each from California/Oregon, Idaho and Colorado, and

two from Southern British Columbia. The total sequence variation observed for DNA barcodes from specimens

taken from throughout the range was less than 1.2%.

Names
Scientific source:
Hosts · map
FamilyScientific name @ source (records)
Brassicaceae  Smelowskia calycina @ BBSL (1)
Campanulaceae  Campanula rotundifolia @ BBSL (1)
_  Withheld @ BBSL__YOSE (116); BBSL (39)

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