Lasioglossum (Dialictus) diabolicum Gardner & Gibbs 2023, sp. nov.
Revision of the Nearctic species of the Lasioglossum (Dialictus) gemmatum species complex (Hymenoptera: Halictidae)
Fig. 76. Male genitalia illustrated in dorsal view and positioned such that the gonostylus is parallel to the plane of vision. Retrorse lobes are also illustrated separately to the bottom left of each figure in lateral view, positioned parallel to the plane of vision. A. Lasioglossum (D.) angelicum sp. nov.B. L. (D.) coactus (Cresson, 1872). C. L. (D.) deludens sp. nov. D. L. (D.) diabolicum sp. nov.E. L. (D.) gaudiale (Sandhouse, 1924). F. L. (D.) gloriosum sp. nov. (the retrorse lobe was not visible for illustration). G. L. (D.) helianthi (Cockerell, 1916). H. L. (D.) holzenthali sp. nov. I. L. (D.) indagator sp. nov. J. L. (D.) magnitegula sp. nov. K. L. (D.) perparvum (Ellis, 1914). L. L. (D.) profoundum sp. nov. M. L. (D.) pseudotegulare (Cockerell, 1896). N. L. (D.) rufodeludens sp. nov. This genital capsule was damaged during dissection and some details may be slightly distorted.O. L. (D.) stictaspis (Sandhouse, 1923) (holotype) (reproduced from Gardner & Gibbs 2022). P. L. (D.) tegulariforme (Crawford, 1907) (reproduced from Gardner & Gibbs 2022). Scale bars = 0.25 mm.
Fig. 87. Tegulae. A. Lasioglossum angelicum sp. nov., ♀, large with inner posterior margin concave and distinct posterior projection (outline and arrow). B. L. diabolicum sp. nov., ♀, small with inner posterior margin nearly straight and no posterior projection (outline). Scale bars = 0.5 mm.
Fig. 97. T1–T3. A. Lasioglossum holzenthali sp. nov., ♀, with thin, sparse basal bands of tomentum and apical rims deeply and distinctly punctate. B. L. diabolicum sp. nov., ♀, with thick, dense basal bands of tomentum and apical rims impunctate. Scale bars = 1 mm.
Fig. 98. Mesepisternum. A. Lasioglossum diabolicum sp. nov., ♀, shiny with distinct round punctures. B. L. tegulare (Robertson, 1890), ♀, dull and rugulose. Scale bars = 0.5 mm.
Fig. 99. Mesepisternum. A. Lasioglossum ellisiae (Sandhouse, 1924), ♀, punctures similar to hypoepimeron. B. L. diabolicum sp. nov., ♀, punctures slightly larger and coarser than on hypoepimeron. Scale bars = 0.5 mm.
Fig. 100. Tegulae. A. Lasioglossum diabolicum sp. nov., ♀, with blunt posterior angle (white outline and arrow). B. L. stictaspis (Sandhouse, 1923), ♀, with rounded posterior projection (white outline and arrow). Scale bars = 0.5 mm.
Fig. 117. T2. A. Lasioglossum egulare (Robertson, 1890), ♂, with dense punctures up to premarginal line sharply contrasting with impunctate apical rim. B. L. diabolicum sp. nov., ♂, with punctures becoming more sparsely punctate near and on premarginal line and not sharply contrasting with apical rim. Scale bars = 0.5 mm.
Fig. 119. Pleura. A. Lasioglossum lepidii (Graenicher, 1927), ♂, preëpisternum and hypoepimeron more finely punctate than mesepisternum. B. L. diabolicum sp. nov., ♂, preëpisternum and hypoepimeron as coarsely punctate as mesepisternum. Scale bars = 0.5 mm.
Fig. 120. Mesoscutum. A. Lasioglossum ellisiae (Sandhouse, 1924), ♂, evenly punctate with most IS = 1 PD. B. L. diabolicum sp. nov., ♂, more coarsely and unevenly punctate. Scale bars = 0.5 mm.
Fig. 17. Georeferenced collection records of Lasioglossum (D.) diabolicum sp. nov. (black squares) and predicted distribution by maximum entropy ecological niche modelling in Maxent (colour shading). Warmer colours indicate higher cloglog probability of occurrence.
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