The ‘ red-tailed’ Lasioglossum (Dialictus) (Hymenoptera: Halictidae) of the western Nearctic
Author
Gardner, Joel
AA15FE6E-921A-46D6-BC67-88E067F283D9
0000-0003-1843-466X
Department of Entomology, University of Manitoba, 12 Dafoe Rd., Winnipeg, Manitoba, R 3 T 2 N 2, Canada.
clickbeetle3364@gmail.com
Author
Gibbs, Jason
BA42A49F-3EBC-4679-8F03-A58E798106B1
0000-0002-4945-5423
Department of Entomology, University of Manitoba, 12 Dafoe Rd., Winnipeg, Manitoba, R 3 T 2 N 2, Canada.
jason.gibbs@umanitoba.ca
text
European Journal of Taxonomy
2020
2020-11-27
725
1
242
journal article
10.5852/ejt.2020.725.1167
9e062836-3946-4ac6-8910-304cadff0d4b
2118-9773
4298139
89FA8DDF-F4B9-417A-A5AF-B2BC9660E024
Lasioglossum
(
Dialictus
)
griswoldi
Gibbs, 2009
Fig. 41
Lasioglossum
(
Dialictus
)
griswoldi
Gibbs, 2009b: 385
, figs 13a–b (
holotype
,
♀
, deposited in BBSL, examined).
Diagnosis
Females of
Lasioglossum griswoldi
can be recognized by the characters for the
Lasioglossum petrellum
species complex (below), in addition to the characters given in the key and the metasomal terga with very narrow rims with long, dense apicolateral fringes (resembling
L
.
cactorum
sp. nov.
in this respect). They are most similar to
L
.
tuolumnense
. Females of
L
.
tuolumnense
have the malar space and supraclypeal area shorter, and scutum slightly duller and more densely punctate. In addition, the geographic ranges of these two species are not known to overlap:
L
.
griswoldi
is only known from the mountains of
Utah
and
Colorado
, while
L
.
tuolumnense
is only known from the mountains of
California
north to
British Columbia
.
Material examined
Holotype
UNITED STATES
–
Utah
•
♀
;
Kane Co.
,
No Mans Mesa
;
37.34555° N
,
112.12921° W
;
31 May 2002
;
C. Davidson
leg.;
ex
Packera multilobata
;
BBSL
.
Other material
UNITED STATES
–
Colorado
•
1 ♀
;
White Rocks
,
near Boulder
; [
40.06° N
,
105.16° W
];
1676 m
a.s.l.
;
5 Jun. 1922
;
AMNH
. –
Utah
•
1 ♀
;
Davis Co.
,
Farmington Canyon
; [
41° N
,
111.86° W
];
24 Jul. 1970
;
G.F. Knowlton
and
G.E. Bohart
leg.;
BBSL
•
1 ♀
;
Salt Lake Co.
,
N of Mill B trail
,
Big Cottonwood Canyon
; [
40.64° N
,
111.72° W
];
6 Jun. 2010
;
J S. Ascher
leg.;
AMNH
.
See also material in
Gibbs (2009b)
.
Description
See
Gibbs (2009b)
for a complete description and figures of the female. The male has not been described. Some male specimens are located at BBSL, but were unavailable for study.
Range
Utah
and
Colorado
(
Fig. 41
).
Floral records
APIACEAE Lindl.
Cymopterus
Raf.
C
.
beckii
S. L. Welsh & Goodrich
(G09) •
ASTERACEAE Giseke
:
Cirsium
(G09) •
Erigeron
(G09) •
Heterotheca
:
H
.
villosa
(Pursh) Shinners
(G09) •
Machaeranthera
:
M
.
canescens
(Pursh) A.Gray
(G09) •
Packera
:
P
.
multilobata
(Torr. & A.Gray ex A.Gray) W.A. Weber & Á. Löve
•
Psilostrophe
:
P
.
sparsiflora
(A.Gray) A. Nelson
(G09) •
Senecio
:
S
.
spartioides
Torr. & A.Gray
(G09) •
Symphyotrichum
:
S
.
chilense
(Nees) G.L. Nesom
(G09) •
Townsendia
:
T
.
incana
Nutt.
(G09) •
BRASSICACEAE Burnett
:
Erysimum
L.
E
.
capitatum
(Douglas) Greene
(G09) •
Stanleya
Nutt.
S
.
pinnata
(Pursh) Britton
(G09) •
CACTACEAE Juss.
Opuntia
Mill.
O
.
erinacea
Engelm. & J.M. Bigelow
(G09) •
FABACEAE Juss.
Melilotus
:
M
.
officinalis
(L.) Pall. (G09) •
MALVACEAE Juss.
Sphaeralcea
A. St.
-Hil.
S
.
coccinea
(Nutt.) Rydb.
(G09) •
PLANTAGINACEAE Juss.
Penstemon
Schmidel
:
P
.
eatonii
A.Gray
(G09) •
POLEMONIACEAE Juss.
Aliciella
Brand:
A
.
caespitosa
(A. Gray) J.M. Porter
(G09) •
Gilia
Ruiz & Pav.
(G09) •
RANUNCULACEAE Juss.
Aquilegia
L. (G09) •
ROSACEAE Juss.
Purshia
DC. ex Poir.
P
.
mexicana
(D. Don) Henr.
(G09) •
TAMARICACEAE Link
:
Tamarix
L.
(G09).
DNA barcodes
Five sequences available (BOLD process IDs: DLII860-07, DLII861-07, DLII1532-09, DLII1533-09, DLII1535-09; BIN: BOLD:AAD3535).
Lasioglossum griswoldi
differs from all other western red-tailed
L
. (
Dialictus
) by 2 fixed substitutions: 198(G) and 327(G). It differs from
L
.
droegei
,
L
.
petrellum
, and
L
.
tuolumnense
by an additional 2 fixed substitutions: 81(T) and 387(C) (Supplementary file 4).
Remarks
Gibbs (2009b)
recorded this species only from
Utah
. It was recorded from Boulder County,
Colorado
, as
L
.
aff. griswoldi
in
Scott
et al
. (2011)
. A Boulder County specimen has been examined by the authors and seems identical to the
Utah
specimens.
A few specimens not examined by
Gibbs (2009b)
from
Utah
have the metasoma completely black, but are otherwise morphologically identical. These might be a distinct species, but without additional evidence, it seems best to consider them no more than a dark variant.