|
Extracted from: Gibbs, J., Packer, L., Dumesh, S. and Danforth, B. N. 2013. Revision and reclassification of Lasioglossum (Evylaeus), L. (Hemihalictus) and L. (Sphecodogastra) in eastern North America (Hymenoptera: Apoidea: Halicidae). Zootaxa 3672 (1). Pp 1-116.
Diagnosis. Female L. fedorense can be recognised by the combination of pronotum sharply angled; mesoscutum
imbricate, dull; hypoepimeral area finely rugulose, impunctate (Fig. 78B); and inner metatibial spur pectinate with
five narrow teeth, basal tooth much longer than width of rachis (Fig. 5B). Lasioglossum fedorense can be easily
distinguished from all eastern species, except L. swenki, by the characters listed above. In L. fedorense the pronotal
carina appears more complete and extends on the lower portion of the pronotum anterior to the dorsolateral sulcus.
Females of L. swenki can often be distinguished by the reddish colour of the metasoma (Fig. 40), but this is not
always true (Fig. 37B). Specimens of L. swenki with a brown metasoma can be distinguished by the hypoepimeral
area smooth, distinctly punctate (Fig. 78A) and pronotal carina not extending anterior to the oblique sulcus.
Male L. fedorense can be recognised by the combination of clypeus yellow, except for basolateral patch
infused with brown (Fig. 6B); mandible elongate, reaching opposing mandible base (as in Fig. 6J); scape yellow,
distinctly longer than F2 (Fig. 6B); gena wide, maximum width below centre of eye (Fig. 16); mesepisternum
imbricate, dull, with shallow punctures; and metapostnotum rugulose. They are most similar to L. sopinci and L.
swenki. Male L. sopinci have the metapostnotum coarsely rugose. Male L. swenki have the gena narrow and
mesepisternum polished, shiny, with distinct, but fine, punctures.
Redescription. FEMALE. Length 7.3–7.8 mm. Head length 1.93–2.03 mm. Head width 1.93–2.08 mm. Wing
length 5.8–6.1 mm. (n=5)
Colour. Head and mesosoma black. Antenna black, except ventral surface of flagellum reddish brown. Tegula
testaceous. Legs dark brown, except medio- and distitarsi reddish brown. Wing membrane hyaline. Pterostigma
pale testaceous. Metasomal terga dark brown, except apical margins testaceous.
Structure. Head wide to round (L/W ratio = 0.95–1.00). Clypeus 1/2 below suborbital line. Eyes convergent
below (UOD:LOD = 1.08–1.21). Gena narrower than eye. Ocelli normal. Pronotal ridge sharply angled,
indistinctly interrupted by oblique lateral sulcus; lower portion distinctly carinate. Protibial spur with apical
serrations subequal in length to width of malus. Inner metatibial spur pectinate, teeth 4–5, basal teeth longer than
width of rachis. Metapostnotum posterior margin smoothly rounded onto posterior propodeal surface. Propodeal
lateral carina not reaching dorsal margin, oblique carina absent.
Surface sculpture. Supraclypeal area imbricate; punctures fine, contiguous (i
Pubescence. Head and mesosoma with sparse plumose hairs. Frons and paraocular area with tomentum.
Mesoscutum lateral margins with tomentum. Mesepisternum and metepisternum with tomentum beneath erect
plumose hairs. Metafemoral scopa with dense plumose hairs. Propodeum with tomentum beneath erect hairs.
Metasomal terga with moderately dense apical fimbriae, continuous on T3–T4. T1 with sparse, erect plumose
hairs. T2–T4 with basal tomentum. Metasomal sterna with mostly simple scopal hairs.
MALE. Length 5.5–7.4 mm. Head length 1.72–2.05 mm. Head width 1.74–2.05 mm. Wing length 4.5–5.3
mm. (n=4)
Colour. Head and mesosoma black. Clypeus yellow, except basolateral testaceous-brown patch. Mandible
yellow. Labrum yellow. Antenna yellow, except dorsal surface of flagellum brown, scape infused with brown
dorsally. Legs yellow-testaceous, except coxae, trochanters brown, outer and inner surface of meso- and metatibiae
infused with brown, femora infused with brown. Wing membrane hyaline, pale. Pterostigma pale testaceous.
Metasomal terga black-brown, apical impressed areas testaceous, T1–T3 sometimes orange-testaceous in part.
Structure. Head long (L/W ratio = 0.96–1.00). Mandible long, reaching opposing mandibular base.
Flagellomeres, except F1, moderately elongate, F2 longer than F1 and pedicel combined, much shorter than scape.
Eyes weakly convergent below (UOD:LOD = 1.13–1.22). Gena wider than eye, widest distally. Pronotal ridge
sharply angled. Propodeal lateral carina not reaching dorsal margin.
Surface sculpture. Supraclypeal area imbricate; punctures fine, dense. Ocellocular area polished, distinctly
punctate. Gena and postgena smooth, weakly imbricate. Mesoscutum polished; punctures fine, dense laterally
(i≤d), clearly separated between parapsidal lines (i=1–1.5d). Mesepisternum reticulate-rugulose, punctures
indistinct. Metapostnotum carinulate-rugulose, apical margin imbricate. Propodeum rugulose-imbricate.
Metasomal terga polished, punctures close throughout.
Pubescence. Head and mesosoma with sparse plumose hairs. Frons and paraocular area with relatively dense
tomentum. Mesoscutum lateral margin with tomentum. Mesepisternum and metepisternum with appressed
tomentum below erect plumose hairs. Propodeum largely bare, with scattered plumose hairs. Metasomal terga with
apical fimbriae sparse. Metasomal sterna with sparse, plumose hairs (1–1.5 OD).
|
