Revision of the metallic Lasioglossum (Dialictus) of eastern North America (Hymenoptera: Halictidae: Halictini)
Author
Gibbs, Jason
text
Zootaxa
2011
2011-10-28
3073
1
216
journal article
31531
10.5281/zenodo.1049595
1a985cc7-af57-45e9-a988-c3beda3c15b4
1175-5326
1049595
B5AF6DF4-D3A7-4942-A94F-CC051D8074CF
Lasioglossum
(
Dialictus
)
anomalum
(Robertson)
Halictus anomalus
Robertson, 1892
: 272
. Ƥ.
Lectotype
. Ƥ
USA
, Illinois, Macoupin Co., Carlinville,
19.v.1891
(C. Robertson); [INHS: 11111] by W. E. LaBerge (in
Webb 1980
). Examined.
Taxonomy.
Robertson, 1902a
:
Dialictus anomalus
3, p. 48 (description);
Sandhouse, 1923
:
Dialictus anomalus
, p. 193 (key);
Michener, 1951
:
Lasioglossum
(
Dialictus
)
anomalum
, p. 1119 (catalogue);
Mitchell, 1960
:
Dialictus anomalus
Ƥ3, p. 379 (redescription, key);
Krombein, 1967
:
Lasioglossum
(
Dialictus
)
anomalum
, p. 462 (catalogue);
Hurd, 1979
:
Dialictus anomalus
, p. 1964 (catalogue);
Moure & Hurd, 1987
:
Dialictus anomalus
, p. 89 (catalogue);
Gibbs, 2010b
:
Lasioglossum
(
Dialictus
)
anomalum
Ƥ3, p. 66 (redescription, key).
Diagnosis.
Both sexes of
L
.
anomalum
can be recognised by the absence of vein 1rs-m resulting in two submarginal cells. Some individuals of
L
.
lionotum
also have two submarginal cells but are easily distinguished by their parasitic characteristics (see diagnosis for
L
.
lionotum
below).
Lasioglossum anomalum
are small, with mesoscutal punctures sparse between parapsidal lines, mesepisternal with contiguous punctures, T2 impunctate on apical half (except along premarginal line), and metasomal terga without tomentum.
Male
L
.
lionotum
have the flagellomeres short (length/width ratio = 1.09–1.25), and gonostylus with elongate, medially directed hairs.
Range.
Ontario west toColorado, south to Alabama.
USA
: AL, CO, CT, GA,
IL
, IN, IA, MA, MI, MN, MO, NC, NE, NY, VT, WI.
CANADA
: ON.
DNA Barcode.
Available. Multiple sequences.
Comments.
Common.
Gibbs (2010b)
reported a less southerly range for
L
.
anomalum
but additional material has since been identified from CUIC.
Lasioglossum anomalum
is the
type
species for
Dialictus
.
Several individuals of
L
.
anomalum
with three submarginal cells in one or both wings have been examined (
Gibbs 2010c
), including one of the
paratypes
at INHS.