Lasioglossum (Dialictus) diabolicum Gardner & Gibbs 2023, sp. nov.

Lasioglossum (Dialictus) diabolicum sp. nov. urn:lsid:zoobank.org:act: 2E554E7E-C8BF-49C4-AC08-2EB5886A18E3 Figs 15–17, 76D, 87B, 97B, 98A, 99B, 100A, 117B, 119B, 120B Diagnosis Females of L. diabolicum sp. nov. have the tegula relatively small (barely reaching posterior margin of mesoscutum in dorsal view if at all), inner posterior margin straight, with a blunt posterior angle or small bump, and mediolateral area usually somewhat sparsely punctate (IS ≥1 PD); mesepisternum punctures usually larger and slightly sparser than hypoepimeron punctures; mesoscutum and mesepisternum sometimes shiny; metapostnotum usually dull with anastomosing rugae; mesoscutum with dense erect pubescence (each seta less than its length from the next nearest one with intervening setae short but having measurable length up to 0.5 OD); and tegula and metasoma often red-orange. Females of L. diabolicum sp. nov. are most similar to those of L. deludens sp. nov., L. ellisiae, and L. perparvum. Females of L. deludens have the tegula impunctate medially, mesoscutum punctures finer in comparison to mesepisternum, and metasoma black to brown. Females of L. ellisiae have the mesepisternum punctures as fine and dense as on hypoepimeron, tegula slightly larger (reaching posterior margin of mesoscutum in dorsal view) with inner posterior margin sinuous, and metapostnotum usually shiny with subparallel rugae. In red-tailed forms, L. diabolicum usually have the basal half of T1 dark brown, while in L. ellisiae it is entirely red. Females of L. perparvum have the mesoscutum with much shorter, sparser pubescence (each long erect seta about its length from the next nearest one, with intervening setae no more than stubble), mesoscutum and mesepisternum dull, and metasoma dark brown to black. Males of L. diabolicum sp. nov. have the tegula relatively small (as in the female); mesoscutum usually shiny and coarsely and moderately sparsely punctate (IS = 1–2 PD); mesepisternum usually densely punctate (IS ≤ 1 PD); T1–T2 with discs finely and moderately sparsely punctate (IS = 1–2 PD) and apical rims impunctate; and mesoscutum with numerous long plumose setae (as in the female). Males of L. diabolicum sp. nov. are most similar to those of L. ellisiae, L. helianthi, and L. perparvum. Males of L. ellisiae have the mesoscutum more evenly and densely punctate (IS ≤1 PD between parapsidal lines) and disc of T2 sometimes more deeply and densely punctate in basal half (IS ≤1 PD). Males of L. helianthi have the mesoscutum entirely densely punctate (IS ≤ 1 PD) and T1–T2 more deeply and densely punctate (IS ≤ 1 PD) including apical rims in part. Males of L. perparvum have the mesoscutum usually tessellate, more finely and densely punctate (IS ≤1 PD), and with sparse erect setae (with gaps 0.5 OD or more visible in lateral view) appearing simple at 40 × magnification. Some other species in the L. stictaspis species complex can also be very similar in both sexes, but have the tegula slightly larger (reaching or exceeding posterior margin of mesoscutum in dorsal view) and inner posterior margin concave with a distinct, rounded posterior projection. Etymology The specific epithet ʻ diabolicum ʼ is a Latin adjective meaning ʻdevilishʼ. It is a reference to this species’ close relationship to L. angelicum sp. nov. and its variable morphology and DNA barcodes which make delimitation and identification very difficult. Material examined Holotype UNITED STATES – Utah • ♀; Garfield Co., The Gulch; 37.8494° N, 111.313° W; 14 Aug. 2001; S. Messinger leg.; ex Melilotus officinalis subsp. alba; BBSL409921. [Verbatim label: USA UT Garfield Co. / The Gulch, 12S E4772461 N4189153 // Melilotus alba // 14 August 2001 / S. Messinger // NativeBeeSurvey / USDA,Logan, Utah / BBSL 409921 // BOLD / BHTT 023-09 / B03750811- UT // HOLOTYPE / Lasioglossum (Dialictus) diabolicum Gardner and Gibbs] Paratypes UNITED STATES – Arizona • 1 ♀; Yuma; [32.69° N, 114.63° W]; 26 Jun. 1951; L.A. Carruth leg.; UAIC • 1 ♀; ibid.; Jun. 1954; J. Ellington leg.; NMSU • 1 ♀; ibid.; 13 Apr. 1955; G.D. Butler, F.G. Werner leg.; ex Pluchea; UAIC • 1 ♀; ibid.; 4 Jun. 1955; G.D. Butler leg.; ex Solanum “ elaegnif -”; UAIC. – California • 2 ♂♂; Imperial Co., Algodones Dunes, Roadrunner Campground; 32.9° N, 115.1167° W; elev. 66 m; 11–15 Nov. 2007; R.B. Kimsey, L. Kimsey, T.J. Zavortink leg.; UCDC • 1 ♀; Needles; [34.85° N, 114.61° W]; “II. III 1922 ”; J.A. Kusche leg.; CAS CASENT 8416761. – Colorado • 2 ♀♀; Mesa Co., 1.34 mi. ESE of Clifton; 39.0832° N, 108.4269° W; 6 Aug. 2015; S.J. Burrows leg.; BBSL983351, BBSL983354 • 1 ♀; Mesa Co., Colorado National Monument, 0.5 mi. inside E entrance; [39.03° N, 108.63° W]; elev. 1524 m; 6 May 1987; U.N. Lanham, M.S. Weissman leg.; ex Lepidium; UCMC. – Nevada • 1 ♀; Clark Co., 8 mi. S of Overton; [36.42° N, 114.45° W]; 27 Apr. 1972; George E. Bohart, F.D. Parker, P.F. Torchio leg.; ex Sphaeralcea; BBSL510025 • 1 ♀; Clark Co., Las Vegas Valley Water District; 36.1756° N, 115.1904° W; elev. 651 m; 10 Jun. 2004; S. Higbee, L. Saul leg.; BBSL537650 • 3 ♀♀; Clark Co., Mesquite; [36.81° N, 114.07° W]; 13 Aug. 1951; E.L. Kessel leg.; CAS • 2 ♀♀; Clark Co., Spring Mountain Ranch; [36.07° N, 115.45° W]; May–Jul. 1988; M.J. Verchick leg.; BBSL700770, BBSL700773 • 2 ♀♀; Las Vegas, 8930 Lansberry Court; 36.1072° N, 115.2863° W; elev. 780 m; 1–20 Jul. 2014; K. Ribardo leg.; UCRC ENT 480495, 480579. – Utah • 1 ♀; Emery Co., Bell Canyon, San Rafael Reef; [38.589° N, 110.808° W]; elev. 1524 m; 26 Jul. 1983; F.D. Parker, A. Parker, Terry L. Griswold leg.; BBSL FaunalSurvey No. 000039439 • 1 ♂; ibid.; 26 Jul. 1983; F.D. Parker, A. Parker, Terry L. Griswold leg.; BBSL FaunalSurvey No. 000039446 • 2 ♀♀, 1 ♂; ibid.; 26 Jul. 1983; F.D. Parker, A. Parker, Terry L. Griswold leg.; CUIC • 1 ♀; Emery Co., Buckskin Spring, north of Goblin Valley; [38.62° N, 110.67° W]; elev. 1554 m; 21 Apr. 1986; Terry L. Griswold leg.; BBSL FaunalSurvey No. 000130265 • 2 ♀♀; Emery Co., Buckskin Spring, north of Goblin Valley; [38.62° N, 110.67° W]; elev. 1570 m; 28 Jul. 1981; F.D. Parker, Terry L. Griswold, D.F. Veirs leg.; BBSL FaunalSurvey No. 000039440, FaunalSurvey No. 000039441 • 1 ♀; Emery Co., Castle Dale; [39.21° N, 111.02° W]; 10 Aug. 1957; Charles D. Michener leg.; ex Cleome serrulata; SEMC • 3 ♀♀; Emery Co., Wild Horse Creek north of Goblin Valley; [38.57° N, 110.82° W]; elev. 1494 m; 21–23 Jul. 1981; D.F. Veirs, F.D. Parker, Terry L. Griswold leg.; BBSL FaunalSurvey No. 000039442, FaunalSurvey No. 000039443, FaunalSurvey No. 000039444 • 2 ♀♀; ibid.; 21–23 Jul. 1981; D.F. Veirs, F.D. Parker, Terry L. Griswold leg.; CUIC • 1 ♀; ibid.; 25–28 Jul. 1983; Parkers, Terry L. Griswold leg.; BBSL FaunalSurvey No. 000039445 • 2 ♂♂; ibid.; 25–28 Jul. 1983; Parkers, Terry L. Griswold leg.; CUIC • 1 ♀; Garfield Co., 2.3 mi. S of Hot Canyon; 37.8506° N, 111.3551° W; 19 May 2003; B. Hanson leg.; BBSL516270 • 1 ♀; Garfield Co., Calf Creek; [37.8° N, 111.41° W]; 29 Aug. 1985; F.D. Parker leg.; BBSL700742 • 1 ♀; Garfield Co., Capitol Reef National Park, Sulfur Creek; [38.3° N, 111.3° W]; 26 Jul. 1978; Lindahl leg.; BBSL700743 • 1 ♀; Garfield Co., Escalante River, 1.3 mi. W of Death Hollow junction; 37.7787° N, 111.5326° W; 13 May 2002; J. Richmond leg.; ex Melilotus officinalis; BBSL437534 • 1 ♀; Garfield Co., Escalante River, 1.3 mi. W of Death Hollow junction; 37.7808° N, 111.5353° W; 13 May 2001; C. Davidson leg.; ex Tamarix sp.; BBSL438836 • 1 ♀; ibid.; 24 Aug. 2001; C. Davidson leg.; ex Melilotus alba; BBSL419411 • 1 ♀; ibid.; 15 Jul. 2002; O.I. Messinge leg.; ex Tamarix sp.; BBSL451103 • 1 ♀; Garfield Co., Shootering Canyon; [37.76° N, 110.7° W]; 28 Jul. 1979; Debby Vogt leg.; BBSL700741 • 1 ♀; Grand Co., 3 mi. E of Bartlett Flat; [38.64° N, 109.78° W]; elev. 1524 m; 5 May 1989; Terry L. Griswold leg.; BBSL FaunalSurvey No. 000130266 • 1 ♂; Grand Co., Moab Highway 128, 2 mile marker roadside; [38.6117° N, 109.5513° W]; 15 Aug. 1992; Laurence Packer leg.; PCYU • 1 ♀; Kane Co., 0.22 mi. N of Mudhole Spring; 37.346° N, 111.2135° W; 6 Aug. 2001; K. Moredock leg.; ex Sphaeralcea sp.; BBSL410597 • 1 ♀; Kane Co., 0.72 mi. NE of Sunset Natural Arch; 37.3822° N, 111.0374° W; 25 Apr. 2001; Terry L. Griswold leg.; ex Streptanthella longirostris; BBSL409348 • 1 ♀; Kane Co., 2 mi. NNW of Duffy Mesa; 37.8507° N, 111.3544° W; 10 May 2001; C. Davidson leg.; ex Salix exigua; BBSL401313 • 1 ♂; Kane Co., Paradise Canyon; 37.4048° N, 111.6497° W; 18 Aug. 2003; Terry L. Griswold leg.; ex Chrysothamnus greenei; BBSL488442 • 1 ♀; Millard Co., Oak Creek Canyon; [39.35° N, 112.26° W]; 27 May 1958; G.F. Knowlton leg.; ex Salix sp.; SEMC • 1 ♀; San Juan Co., Canyonlands, Box hanging garden; [38.2° N, 109.9° W]; 11 Jul. 1993; J.F. Fowler leg.; BBSL700706 • 2 ♀♀; San Juan Co., Glen Canyon, Camp hanging garden; [37.1° N, 110.9° W]; 26 Jun. 1992; J.F. Fowler leg.; BBSL700843, BBSL700853 • 1 ♀; ibid.; 26 Jun. 1992; J.F. Fowler leg.; CUIC • 1 ♂; San Juan Co., Glen Canyon, Hardwood hanging garden; [37.1° N, 110.9° W]; 27 Jul. 1991; J.F. Fowler leg.; ex Thelypodium integrifolium; BBSL700845 • 1 ♀; ibid.; 31 Jul. 1991; J.F. Fowler leg.; BBSL700849 • 1 ♀; San Juan Co., Glen Canyon, Hook hanging garden; [37.1° N, 110.9° W]; 11 Jun. 1992; J.F. Fowler leg.; ex Cirsium rydbergii; BBSL700847 • 1 ♀; San Juan Co., Glen Canyon, Iceberg Canyon; [37.31° N, 110.74° W]; 16 May 1992; J.F. Fowler leg.; CUIC • 4 ♀♀; San Juan Co., Glen Canyon, Pyro hanging garden; [37.1° N, 110.9° W]; 26 Jun. 1992; J.F. Fowler leg.; BBSL700848, BBSL700851, BBSL700852, BBSL700854 • 1 ♀; Washington Co., 0.24 mi. SSW of Angels Landing; 37.266° N, 112.9487° W; 15 May 2006; B. Hays leg.; ex Tamarix sp.; BBSL ZION25451 • 1 ♂; Washington Co., 5 mi. Leeds Canyon; [37.31° N, 113.43° W]; 8 Jun. 1964; G.F. Knowlton leg.; SEMC • 1 ♀; Washington Co., Beaver Dam Wash; [37.1° N, 114.02° W]; 10–24 Jun. 1987; BBSL700661 • 2 ♂♂; ibid.; 10–24 Jun. 1987; BBSL700819, BBSL700825 • 1 ♀; ibid.; 10–24 Jun. 1987; WR

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