Lasioglossum (Dialictus) gaudiale

• Main Authors: Gardner, Joel, Gibbs, Jason
• Format: Other/Unknown Material
• Language: unknown
• Published: 2023
• Subjects: Biodiversity; Taxonomy; Animalia; Arthropoda; Insecta; Hymenoptera; Halictidae; Lasioglossum; Lasioglossum gaudiale; Austin; Gardner; Dewey; Hurd; Eldorado; Keeler; Juanita; The Narrows; Blythe; Animas; Lost Valley; Rainbow Mountain; Saddle Island; Calamity Creek; Wilson Pass; Beehive Rock
• Online Access: https://zenodo.org/record/8320153; https://doi.org/10.5281/zenodo.8320153

Lasioglossum (Dialictus) gaudiale (Sandhouse, 1924) Figs 24–26, 76E, 91B, 94A, 103A, 104A, 114A Halictus (Chloralictus) gaudialis Sandhouse, 1924: 23 (holotype, ♂, deposited in USNM, type no. 26418, examined). Halictus (Chloralictus) gaudialis – Michener 1936: 283 (relationship to helianthi). Lasioglossum (Chloralictus) tegulariforme – Michener 1951: 1118 (in part, synonymy, catalogue). Dialictus tegulariformis – Hurd 1979: 1972 (in part, catalogue). — Moure & Hurd 1987: 134 (in part, catalogue). Lasioglossum (Dialictus) gaudiale – Gardner & Gibbs 2022: 28 (resurrection from synonymy). Diagnosis Females of L. gaudiale have the tegula relatively small (reaching and sometimes slightly exceeding posterior margin of mesoscutum in dorsal view), with inner posterior margin strongly concave and a small rounded posterior projection, and usually densely punctate (IS ≤ 1 PD, rarely up to 2 PD); T1 anterior slope polished and mirror-smooth (rarely with very weak microsculpture basally); gena about as wide as eye in lateral view; metapostnotum usually shiny basally with strong subparallel rugae not reaching the posterior margin (sometimes dull, with rugae anastomosing, or rugae reaching posterior margin, but never all at once); mesoscutum with no tomentum; T3 without a subapical band of tomentum; and metasoma usually black to brown (rarely red-orange). In many cases, the scutellum is significantly more coarsely and sparsely punctate than the mesoscutum (IS = 1–2 PD), but this is unreliable as a primary diagnostic character. Females of L. gaudiale are most similar to those of L. angelicum sp. nov., L. eremum sp. nov., L. gloriosum sp. nov., L. indagator sp. nov., and L. pseudotegulare, all of which (except L. indagator) have the gena narrower than eye in lateral view and scutellum usually finely and densely punctate (IS <1 PD). In addition, females of L. eremum sp. nov. have the metapostnotum with anastomosing rugae reaching the posterior margin and T1 anterior slope coriarious. Females of L. gloriosum have the T1 ...