Lasioglossum (Dialictus) cactorum Gardner & Gibbs 2020, sp. nov.

Lasioglossum (Dialictus) cactorum sp. nov. urn:lsid:zoobank.org:act: A034807A-0DCB-48D2-9C47-EA6271D76562 Figs 16–18, 93C, 114A Diagnosis Females of Lasioglossum cactorum sp. nov. can be recognized by the unusual rims of T1–3, which are extremely narrow, abruptly depressed, and with long and dense lateral hair fringes, head broad (face length/width ratio ~0.83) and often quite large, mesepisternum rugose or with very dense punctures at least dorsally (i <1 pd), T1 without impunctate apicolateral oval patches, T2–4 with dark spiracular spots, and supraclypeal area sometimes black or golden-green medially. They are most similar to L. festinum sp. nov. and L. mesillense. Both of these species have the rims of T1–3 wide and flat and T1 with impunctate apicolateral oval patches. In addition, females of L. festinum sp. nov. have T2 lacking dark spiracular spots, and females of L. mesillense have the supraclypeal area always metallic blue-green. Males of L. cactorum sp. nov. can be recognized by T1–4 strongly convex in lateral view, with very narrow, steeply depressed rims and no change in punctation or sculpture across the premarginal line, mesepisternum densely punctate (i <1 pd), propodeum dorsolateral slope smooth and distinctly punctate, face below eye emargination covered in dense tomentum, and metasoma entirely black. They are most similar to L. arenisaltans sp. nov., L. clematisellum, and L. minckleyi sp. nov. All of these species have the metasomal terga mostly flat in lateral view with sparser, less distinct punctures across the premarginal line. In addition, males of L. arenisaltans sp. nov. have the propodeum dorsolateral slope rugulose and metasoma often red-orange. Males of L. clematisellum are smaller (about 4 mm), with the mesepisternum more sparsely punctate dorsally (i=1–2 pd), and propodeum dorsolateral slope weakly rugulose. Males of L. minckleyi sp. nov. have the face slightly shorter (length/width ratio ~0.8) and metasoma often partially red-orange. Etymology The specific epithet ‘ cactorum ’ is the Latin genitive plural of the noun ‘ cactus ’. It refers to this species’ frequent association with flowering plants in the family Cactaceae. An appropriate translation would be the cactus sweat bee. Material examined Holotype UNITED STATES – Nevada • ♀; Clark Co., 2.2 mi. SSW of Mormon Well; 36.6147° N, 115.1111° W; 2008 m a.s.l.; 14 Jun. 2004; E. Ahlstrom and D. Skandilis leg.; PCYU. [Verbatim label: USA NV Clark Co. 2.2 mi. SSW Mormon Well 6588ft 11S E668922 N4053788 14Jun 2004 PnTrp, fl ylw, E. Ahlstrom, D. Skandilis / BBSL537603 // 2374F06 // HOLOTYPE / Lasioglossum (Dialictus) cactorum Gardner and Gibbs] Paratypes UNITED STATES – Arizona • 1 ♀; Maricopa Co., Mountain View Park; 33.5787° N, 112.0799° W; 18 May 2017; S.J. Hall et al. leg.; ASUHIC • 2 ♀♀; Grand Canyon Mile 1792; [36° N, 112° W]; 11 Jun. 1953; G.D. Butler leg.; UAIC • 1 ♀; same collection data as for preceding; USNM • 1 ♀; Grand Canyon Mile 32; [36° N, 112° W]; 6 Jun. 1953; G.D. Butler leg.; UAIC • 1 ♀; Mojave Co., White Hills, Lk. Mead NRA; [35.83° N, 114.32° W]; 488 m a.s.l.; 30 Mar. 1993; T. Griswold and V. Tepedino leg.; ex Arctomecon californica; BBSL. – California • 1 ♀; Inyo Co., 1 km SE of Swansea; [36.52° N, 117.9° W]; 19 Sep. 1993; T. Griswold leg.; BBSL • 1 ♀; San Bernardino Co., 9 air mi. S of Baker, Zzyzx Springs; [35.14° N, 116.1° W]; 20–21 Apr. 1977; M. Buegler leg.; EMEC • 1 ♀; same location as for preceding; 22 Apr. 1977; Chemsak leg.; EMEC • 1 ♀; Anza Borrego, Vallecito Crk.; 32.9157° N, 116.2255° W; 8 Jun. 2013; K.E. Borchers leg.; ex Psorothamnus spinosus; WRME • 2 ♀♀; San Diego Co., Borrego Springs (NW side), YPT, rocky draw nr base of Indian head; 33.2925° N, 116.4° W; 213 m a.s.l.; 12 Jan. 2011; John / Derrin Pinto leg.; UCRC • 2 ♀♀; Riverside Co., Corn Spring, Chuckwalla Mts, 7.5 mi. SE of Desert Center; [33.626° N, 115.325° W]; 488 m a.s.l.; 15–17 Jun. 1973; J.P. and K.E. Donahue leg.; LACM • 1 ♀; San Bernardino Co., Cove Spr., Granite Mts; [34.78° N, 115.65° W]; 1311 m a.s.l.; 31 May 1981; T. Griswold leg.; BBSL • 1 ♀; Death Valley; [36.5° N, 116.9° W]; 26 Jun. 1953; G.D. Butler leg.; ex Stanleya; UAIC • 1 ♀; Death Valley National Monument; [36.5° N, 116.9° W]; 31 Mar. 1976; M.A. Ivie leg.; MTEC • 1 ♀; Inyo Co., Death Valley NP, E of Travertine Spr.; 36.4388° N, 116.8258° W; 16 Mar. 1998; T. Griswold leg.; BBSL • 2 ♀♀; Riverside Co., Deep Canyon; 33.6475° N, 116.3806° W; 295 m a.s.l.; 17 Apr. 2009; ex cactus; UCRC • 1 ♂; Riverside Co., Deep Canyon; [33.62° N, 116.4° W]; 11 Jul. 1963; E.I. Schlinger leg.; UCRC • 1 ♂; same location as for preceding; 13 Jun. 1963; E.I. Schlinger leg.; ex Eriogonum; UCRC • 1 ♀; same location as for preceding; 11 Nov. 1963; M.E. Irwin leg.; UCRC • 1 ♀; Inyo Co., DVNM Keane Spr.; [36.745° N, 116.902° W]; 18 Apr. 1994; W.R. Bowlin leg.; ex Arctomecon merriamii; BBSL • 1 ♀; Inyo Co., DVNM Klare Spr.; [36.841° N, 117.091° W]; 15 Apr. 1994; W.R. Bowlin leg.; ex Argemone spp.; BBSL • 2 ♀♀; Inyo Co., DVNM Mes. Spr.; [36.964° N, 117.368° W]; 13 Apr. 1994; W.R. Bowlin leg.; ex Arctomecon merriamii; BBSL • 1 ♀; Inyo Co., DVNM, Lost Burro Gap, Cottonwood Mts; [36.746° N, 117.52° W]; 914 m a.s.l.; 15 Oct. 1985; R.R. Snelling leg.; ex Ericameria nauseosa var. nauseosa; LACM • 1 ♀; Inyo Co., Emigrant Pass, E of Tecopa; [35.89° N, 116.08° W]; 15 Sep. 1993; T. Griswold leg.; ex Eriogonum deflexum; BBSL • 2 ♀♀; Inyo Co., Grapevine Canyon, Death Valley N. M.; [37.005° N, 117.356° W]; 760 m a.s.l.; 16 Sep. 1993; T. Griswold leg.; ex Cleomella obtusifolia; BBSL • 1 ♀; San Bernardino Co., Mid Hills, SSE of Cima; [35.15° N, 115.43° W]; 14 Sep. 1975; T. Griswold leg.; BBSL • 1 ♀; San Bernardino Co., Norris Camp; 34.8089° N, 115.6281° W; 1215 m a.s.l.; 13 May 2013; D. Yanega leg.; UCRC • 2 ♀♀; Riverside Co., Palm Springs; 33.6796° N, 116.548° W; 6–12 May 2014; F.D. Parker and T.D. McIntyre leg.; BBSL • 1 ♀; same location as for preceding; 13–16 May 2014; F.D. Parker and T.D. McIntyre leg.; BBSL • 2 ♀♀; same location as for preceding; 14–18 Apr. 2014; F.D. Parker and T.D. McIntyre leg.; BBSL • 7 ♀♀; same location as for preceding; 28 Apr. 2014; F.D. Parker and T.D. McIntyre leg.; BBSL • 1 ♀; Sunset Cove, Granites Res. Stn. Mojave Desert; 34.77903° N, 115.66311° W; 24 Apr. 2018; J. Braun leg.; PCYU • 1 ♀; same location as for preceding; 4 May 2018; J. Braun leg.; PCYU • 1 ♀; Inyo Co., Surprise Canyon; [36.11° N, 117.15° W]; 29 Apr. 1953; R.O. Schuster leg.; EMEC • 1 ♀; same location as for preceding; 6 May 1961; D.Q. Cavagnaro leg.; UCDC • 2 ♀♀; Inyo Co., Surprise Canyon, Panamint Mountains; [36.11° N, 117.15° W]; 24 Apr. 1957; P.D. Hurd leg.; ex Eriogonum inflatum; EMEC • 1 ♀; San Bernardino Co., Willow Wash, Sec24 T13N R10E; [35.2° N, 115.87° W]; 10 May 1982; T. Griswold leg.; BBSL • 2 ♀♀; Riverside Co., Windy Point; 33.892° N, 116.6393° W; 24 Mar. 2019; J. Gardner leg.; ex Ferocactus cylindraceus; WRME • 1 ♀; San Bernardino Co., Zzyzx Springs; [35.14° N, 116.1° W]; 26 Mar. 1988; S. O’Keefe leg.; EMEC • 10 ♀♀; San Bernardino Co.; 34.8681° N, 115.7731° W; 16–17 Aug. 2011; N. Darby leg.; WRME • 1 ♀; San Bernardino Co.; 34.8794° N, 115.7808° W; 16–17 Aug. 2011; N. Darby leg.; WRME. – Nevada • 2 ♀♀; Clark Co., 0.2 mi. W of Hiko Spr.; 35.1675° N, 114.6813° W; 609 m a.s.l.; 27 Apr. 2004; S. Higbee and E. Ahlstrom leg.; BBSL • 1 ♀; Clark Co., 0.5 mi. SW of Cabin Spr.; 36.5362° N, 114.0844° W; 1368 m a.s.l.; 17 Aug. 2004; E. Ahlstrom leg.; ex Eriogonum deflexum; BBSL • 1 ♀; Clark Co., 2 mi. E of Sawmill Canyon; 36.7008° N, 115.0492° W; 1439 m a.s.l.; 2 Sep. 2004; E. Rentz leg.; ex Eriogonum fasciculatum; BBSL • 1 ♀; Clark Co., 2.1 mi. N of Harris Spr.; 36.2707° N, 115.5434° W; 1775 m a.s.l.; 22 Jun. 2004; L. Saul leg.; ex Argemone munita; BBSL • 4 ♀♀; same collection data as for holotype; BBSL • 1 ♀; Clark Co., 2.7 mi. ESE of Red Bluff Spr.; 36.6209° N, 114.2066° W; 15 Apr. 2005; S. Higbee leg.; PCYU • 2 ♀♀; Clark Co., 3.5 mi. SE of Hiko Spr.; 35.1252° N, 114.6432° W; 235 m a.s.l.; 27 Apr. 2004; S. Higbee and E. Ahlstrom leg.; BBSL • 1 ♀; 4 mi. E. of Glendale; [36.66° N, 114.49° W]; 20 Jun. 1939; Timberlake leg.; ex Sphaeralcea; UCRC • 1 ♀; Nye Co., Ash Meadows; [36.4° N, 116.3° W]; 18 Apr. 1993; T. Griswold leg.; BBSL • 1 ♀; Clark Co., Columbia Pass; 35.8224° N, 115.4835° W; 1319 m a.s.l.; 31 Aug. 2004; S. Higbee leg.; ex Eriogonum deflexum; BBSL • 1 ♀; Clark Co., E of Trapp Ridge; 36.3905° N, 114.1287° W; 4 Aug. 1998; M. Andres and C. Shultz leg.; BBSL • 4 ♀♀; Clark Co., Gypsum Spring; 36.2093° N, 114.912° W; 12 Mar. 1998; T. Griswold leg.; BBSL • 1 ♀; Clark Co., Gypsum Wash; 36.2177° N, 114.8965° W; 12 Mar. 1998; T. Griswold leg.; BBSL • 1 ♀; Clark Co., 22 mi. S of Las Vegas; [35.85° N, 115.25° W]; 3 Apr. 1953; J.W. MacSwain leg.; EMEC • 5 ♀♀; Clark Co., Lee Canyon; 36.4476° N, 115.5097° W; 1252 m a.s.l.; 7 Sep. 2004; S. Higbee and T. Griswold leg.; BBSL • 3 ♀♀; same location as for preceding; 7 Sep. 2004; S. Higbee and T. Griswold leg.; PCYU • 1 ♀; Clark Co., Mormon Well; 36.6752° N, 115.0952° W; 1 Jul. 1998; M. Andres and C. Shultz leg.; BBSL • 2 ♀♀; Clark Co., Peek a Boo Canyon; 36.5065° N, 115.1477° W; 16 Jul. 1998; M. Andres and C. Shultz leg.; BBSL • 1 ♀; Clark Co., Pulsipher Wash; 36.8073° N, 114.1143° W; 16 Sep. 1998; W. Bowlin leg.; BBSL • 1 ♀; Clark Co., Sandy Valley; 35.852° N, 115.6715° W; 25 Aug. 1998; O. Messinger and C. Shultz leg.; BBSL • 1 ♀; Clark Co., Sheep Mountain; 35.7598° N, 115.3213° W; 11 Aug. 1998; M. Andres, C. Shultz and T. Griswold leg.; BBSL • 1 ♀; Clark Co., Sheep Range; 36.4382° N, 115.2983° W; 28 May 1998; F.D. Parker leg.; BBSL • 6 ♀♀; Clark Co., Wheeler Wash; 36.239° N, 115.8865° W; 20 Jul. 1998; M. Andres and C. Shultz leg.; BBSL. – Utah • 1 ♀; Washington Co., summit, road to Lytle Ranch Preserve; [37.14° N, 114.04° W]; 20 Aug.–9 Sep. 1987; W.J. Hanson and M. T. leg.; BBSL. Description Female COLOURATION. Head and mesosoma blue to blue-green; clypeus apical colour orange

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