Lasioglossum (Dialictus) tegulare

Gibbs, Jason, 2009, Integrative taxonomy identifies new (and old) species in the Lasioglossum (Dialictus) tegulare (Robertson) species group (Hymenoptera, Halictidae), Zootaxa 2032, pp. 1-38: 13

publication ID 10.5281/zenodo.186301

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Lasioglossum (Dialictus) tegulare


Lasioglossum (Dialictus) tegulare   species group

Diagnosis. Members of the L. tegulare   group can be distinguished from most other Dialictus   by the presence of an enlarged and punctate tegula. In North America, there are two exceptions; L. marinum   and L. megastictum (Cockerell)   both have enlarged tegula but additional morphological data do not support a close relationship to L. tegulare   (Gibbs, unpublished data). Both of these latter species are larger than members of the tegulare   group and have dense punctation on the mesoscutum. In contrast, species within the tegulare   group are small to at most medium-sized Dialictus   and have close but distinctly separated punctures on the central disc of the mesoscutum. In addition, L. marinum   has metallic reflections on the metasoma that are absent in the tegulare   group. Lasioglossum megastictum   lacks punctures on the mesepisternum that are a common feature of many tegulare   group species.

Description. Small to medium sized (3.5–6.1 mm); andreniform; head and mesosoma dull metallic; metasoma dark brown to piceous, rarely ferruginous (as in L. hunteri   [Crawford]); mesoscutum punctation close but distinctly separated on centre of disc; mesepisternum often distinctly punctate; tegula enlarged forming posterior angle often coarsely punctate; basal vein arched; 2 nd and 3 rd submarginal crossveins (1 rs-m and 2 rs-m) and 2 nd recurrent vein (2 m-cu) weak.