Lasioglossum (Dialictus) tuolumnense Gibbs, 2009

Gardner, Joel & Gibbs, Jason, 2020, The ‘ red-tailed’ Lasioglossum (Dialictus) (Hymenoptera: Halictidae) of the western Nearctic, European Journal of Taxonomy 725, pp. 1-242 : 199-200

Lasioglossum (Dialictus) tuolumnense Gibbs, 2009

Fig. 87

Lasioglossum (Dialictus) tuolumnense Gibbs, 2009: 382 , figs 10a–b, 11a–b, 12a–d (holotype, ♀, deposited in BBSL, examined).

Lasioglossum (Dialictus) tuolumnense – Heron & Sheffield 2015 (distribution).

Diagnosis

Both sexes of Lasioglossum tuolumnense can be recognized by the characters for the Lasioglossum petrellum species complex (below), in addition to the characters given in the keys. Females are most similar to L. griswoldi , and probably males as well (the male of L. griswoldi is not described). Females of L. griswoldi have the malar space and supraclypeal area longer, and scutum slightly shinier and less densely punctate. In addition, the geographic ranges of these two species are not known to overlap: L. tuolumnense is only known from the mountains of California north to British Columbia, while L. griswoldi is only known from Utah and Colorado.

Material examined

Holotype

UNITED STATES – California • ♀; Tuolumne Co., 2.2 mi. WNW of Mount Gibson; 38.01029° N, 119.738° W; 2036 m a.s.l.; 1 Aug. 2005; L. Fuerst and H. Briggs leg.; BBSL.

Other material

UNITED STATES – California • 1 ♀; Alpine Co., Woodfords ; [38.78° N, 119.82° W]; 18 Oct. 1962; W.R. Bauer leg.; LACM • 1 ♀; Amador Co., Bear River Reservoir ; [38.56° N, 120.22° W]; 1 Aug. 1970; S.R. Sims leg.; UCDC • 1 ♀; El Dorado Co., Ice House Road (24 air mi. ENE of Placerville); [38.87° N, 120.38° W]; 16–17 Jul. 1983; W.J. Pulawski leg.; CAS • 1 ♀; Fresno Co., Kip Camp Area, Mt. Abbot Map ; [37.37° N, 118.89° W]; 3 Jul. 1981; J.A. Halstead leg.; BBSL • 1 ♀; Kern Co., Sand Canyon 3 mi. W of Brown; [35.78° N, 117.92° W]; 7 Apr. 1966; R.M. Bohart leg.; UCDC • 1 ♀; same location as for preceding; 7 Apr. 1966; R.O. Schuster leg.; UCDC • 1 ♀; Mono Co., Convict Lake ; [37.6° N, 118.86° W]; 2530 m a.s.l.; 24 Jul. 1978; G.A. Levin leg.; ex Penstemon bridgesii ; UCDC • 1 ♀; Mono Co., White Mountains, Crooked Creek Ranger Station ; 37.4983° N, 118.17° W; 3094 m a.s.l.; 4 Jul. 2004; F.D. Parker leg.; BBSL • 1 ♀; Tulare Co., Ash Mountain HQ; [36.49° N, 118.84° W]; 518 m a.s.l.; 3 May 1979; J.A. Chemsak leg.; EMEC • 2 ♀♀; same location as for preceding; 3–4 May 1979; M.E. Buegler leg.; EMEC • 1 ♀; Tulare Co., Ash Mountain Kaweah Power Station #3; [36.486° N, 118.837° W]; 15 Aug. 1982; J.A. Halstead leg.; BBSL • 1 ♀; Andreas Canyon ; [33.75° N, 116.6° W]; 6 Mar. 1933; H.L. McKenzie leg.; UCDC • 1 ♀; Half Moon L., Tahoe ; [38.89° N, 120.13° W]; 23 Jul. 1915; E.P. Van Duzee leg.; USNM • 1 ♀; Julian ; 33.1739° N, 116.6228° W; 25 Jun. 2016; K.J. Hung, Petterson, Matagual leg.; ex Calochortus weedii ; WRME • 1 ♀; Mineralking ; [36.45° N, 118.595° W]; 11 Jul. 1935; BBSL .

See also material in Gibbs (2009b).

Description

See Gibbs (2009b) for a complete description and figures.

Range

High elevations from southern California north to southern British Columbia ( Fig. 87 ).

Floral records

AMARYLLIDACEAE J. St. -Hil. Allium L. A. yosemitense Eastw. (G09) • ASTERACEAE Giseke : Cirsium : C. occidentale (Nutt.) Jeps. C. o. var. californicum (A.Gray) D.J. Keil & C.E. Turner (G09) • Eriophyllum : E. lanatum (Pursh) J. Forbes : E. L. var. integrifolium (Hook.) Smiley (G09) • Malacothrix (G09) • Senecio : S. scorzonella Greene (G09) • ERICACEAE Juss. Arctostaphylos Adans. A. viscida Parry (G09) • LILIACEAE Juss. Calochortus Pursh : C. weedii Alph. Wood • LIMNANTHACEAE R.Br. Limnanthes R.Br. L. montana Jeps. (G09) • PLANTAGINACEAE Juss. Keckiella Straw : K. breviflora (Lindl.) Straw (G09) • Penstemon Schmidel : P. bridgesii A.Gray • P. newberryi A.Gray (G09) • ROSACEAE Juss. Chamaebatia Benth. C. foliolosa Benth. (G09).

DNA barcodes

Seven sequences available (BOLD process IDs: DLII296-07, DLII302-07, DLII305-07, DLII922-07, DLII942-07, DLII944-07, DLII998-07; BIN: BOLD:AAD3535). Lasioglossum tuolumnense differs from L. droegei , L. griswoldi , and L. petrellum by 1 fixed substitution: 153(T) (Supplementary file 4). No unique fixed substitutions distinguish L. tuolumnense from all other western red-tailed L. ( Dialictus ).

Remarks

At least one specimen from the Cascade Mountains in Oregon has a completely black metasoma. This specimen was not available for physical study, but photographs taken by Joe Engler (FWSE) were examined and match L. tuolumnense except in colouration.

Figures

Fig. 87. Georeferenced collection records ofLasioglossum (D.) tuolumnense Gibbs, 2009 (black squares) and predicted distribution by maximum entropy ecological niche modeling in Maxent (colour shading). Warmer colours indicate higher cloglog probability of occurrence. Note that L. (D.) tuolumnense is also believed to occur in Oregon based on a photographed specimen.