Lasioglossum (Dialictus) achilleae (Mitchell)

Gibbs, Jason, 2011, Revision of the metallic Lasioglossum (Dialictus) of eastern North America (Hymenoptera: Halictidae: Halictini), Zootaxa 3073, pp. 1-216: 38-39

publication ID

http://doi.org/ 10.5281/zenodo.1049595

publication LSID

lsid:zoobank.org:pub:B5AF6DF4-D3A7-4942-A94F-CC051D8074CF

persistent identifier

http://treatment.plazi.org/id/9A5987DB-A733-FF91-0A97-8ACBFE070786

treatment provided by

Plazi

scientific name

Lasioglossum (Dialictus) achilleae (Mitchell)
status

 

Lasioglossum (Dialictus) achilleae (Mitchell)  

( Figure 45–46 View FIGURE 45 View FIGURE 46 )

Dialictus achilleae Mitchell, 1960: 377   . Ƥ.

Holotype. Ƥ USA, North Carolina, Cruso   , June 25, 1934, on Achillea, (T.B. Mitchell)   ; [ NCSU]. Examined.

Taxonomy. Krombein, 1967: Lasioglossum (Dialictus) achilleae   , p. 462 (catalogue); Hurd, 1979: Dialictus achilleae   , p. 1963 (catalogue); Moure & Hurd, 1987: Dialictus achilleae   , p. 87; Gibbs, 2010 b: Lasioglossum (Dialictus) achilleae   Ƥ, p. 49 (redescription, key).

Diagnosis. Female L. achilleae   can be recognised by the following diagnostic combination: mesoscutum polished due to lack of microsculpture, punctures sparse throughout; propodeum with strong oblique carina; and metapostnotum delimited from posterior propodeal surface by sharp transverse angle or carina. They are most similar to L. apopkense   , which has mesoscutum dull due microsculpture.

Male L. achilleae   can be recognised by the following diagnostic combination: F 1 short (F 2:F 1 ratio = 2.5–2.8); mesoscutum polished, punctures sparse throughout ( Fig. 46 View FIGURE 46 ); propodeum rugose with strong oblique carina; metasomal terga sparsely punctate, impunctate on apical impressed areas; and metasomal sterna with sparse pubescence. They are most similar to L. apopkense   , L. lineatulum   , and L. novascotiae   . Male L. apopkense   have mesoscutum dull due to strong microsculpture. Male L. lineatulum   have F 1 longer (F 2:F 1 ratio = 1.6–1.8) and more abundant sternal hairs. Male L. novascotiae   have head longer and denser punctures on metasomal terga.

Description. MALE. Similar to female (see Gibbs 2010 b) except for the usual secondary sexual characters and as follows. Length 4.50–4.56 mm; head length 1.25–1.45 mm; head width 1.33–1.53 mm; forewing length 3.62–3.80 mm.

Colouration. Flagellum with ventral surface reddish brown. Pterostigma pale brownish yellow. Legs brown, except tarsi pale brownish yellow.

Pubescence. Face below eye emargination with relatively dense tomentum partially obscuring surface, denser on lower paraocular area. Metasomal sterna sparsely pubescent, S 3 –S 4 with small apicolateral tufts (1 OD).

Surface sculpture. Mesoscutum polished, microsculpture faint; punctation sparse between parapsidal lines (i= 1–3 d) and laterad of parapsidal line (i= 1–2 d). Propodeal dorsolateral slope coarsely rugose. T 2 apical impressed area impunctate.

Structure. Head wide (length/width ratio = 0.94–0.95). Eyes strongly convergent below (UOD/LOD ratio = 1.48– 1.68). Clypeus 2 / 3 below suborbital tangent, apicolateral margins weakly convergent. Antennal sockets distant (IAD/ OAD> 1.0). Frontal line carinate, ending 1.5 OD below median ocellus. Pedicel subequal to F 1. F 2 length 2.5–2.8 X F 1. F 2 –F 10 elongate (length/width ratio = 1.50–1.83). Metapostnotum moderately elongate (MMR ratio = 1.20–1.27), posterior margin sharply angled onto posterior propodeal surface.

Terminalia   . Not examined.

Range. Southern Ontario south to south to Georgia. USA: GA, MA, MI, NC, NY. CANADA: ON.

Additional specimens examined. USA: NEW YORK: 1 Ƥ 333 Albany Co., Colonie, 20.viii. 1969, pine barrens, (G. & K. Eickwort); [ CUIC].

DNA Barcode. Available. Single sequence.

Comments. Uncommon.

NCSU

North Carolina State University Insect Museum

NEW

University of Newcastle

CUIC

Cornell University Insect Collection

DNA

Department of Natural Resources, Environment, The Arts and Sport

Kingdom

Animalia

Phylum

Arthropoda

Class

Insecta

Order

Hymenoptera

Family

Halictidae

Genus

Lasioglossum

Loc

Lasioglossum (Dialictus) achilleae (Mitchell)

Gibbs, Jason 2011
2011
Loc

Dialictus achilleae

Mitchell 1960: 377
1960