Lasioglossum (Hemihalictus) Cockerell 1897
Creators: name: Murao, Ryuki
Publisher: name: Zenodo
Year: 2021
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Hymenoptera
Halictidae
Lasioglossum

description: Lasioglossum (Hemihalictus) Cockerell, 1897
Hemihalictus Cockerell, 1897: 288 (also published as new by Cockerell 1898) (type species: Panurgus lustrans Cockerell, 1897, by original designation).
Sudila Cameron, 1898: 52 (type species: Sudila bidentata Cameron, 1898, by designation of Sandhouse 1943).
Prosopalictus Strand, 1913: 26 (type species: Prosopalictus micans Strand, 1913, by original designation and monotypy).
Ceylonicola Friese, 1918: 501 (type species: Ceylonicola atra Friese, 1918 = Sudila bidentata Cameron, 1898, by designation of Sandhouse 1943).
Halictus (Microhalictus) Warncke, 1975: 85 (type species: Melitta minutissima Kirby, 1802, by original designation).
Halictus (Puncthalictus) Warncke, 1975: 87 (type species: Hylaeus punctatissimus Schenck, 1853, by original designation).
Halictus (Rostrohalictus) Warncke, 1975: 88 (type species: Halictus longirostris Morawitz, 1876, by original designation and monotypy).
Halictus (Marghalictus) Warncke, 1975: 95 (type species: Hylaeus marginellus Schenck, 1853, by original designation).
Lasioglossum (Sellalictus) Pauly, 1980: 120 (type species: Halictus latesellatus Cockerell, 1937, by original designation).
Halictus (Pauphalictus) Warncke, 1981: 87 (type species: Halictus pauperatus Brullé, 1832, by original designation).
Lasioglossum (Mediocralictus) Pauly, 1984: 143 (type species: Halictus mediocris Benoist, 1962, by original designation).
Evylaeus (Limbevylaeus) Pesenko, 2007a: 20 (type species: Halictus limbellus Morawitz, 1876, by original designation).
Evylaeus (Crassevylaeus) Pesenko, 2007a: 20 (type species: Halictus crassepunctatus Blüthgen, 1923, by original designation and monotypy).
Evylaeus (Laevinodilaeus) Pesenko, 2007a: 20 (type species: Halictus laevinodis Morawitz, 1876, by original designation and monotype).
Evylaeus (Pallidevylaeus) Pesenko, 2007a: 23 (type species: Nomioides pallida Radoszkowski, 1888, by original designation and monotypy).
Evylaeus (Nitidiusculaeus) Pesenko, 2007a: 24 (type species: Melitta nitidiuscula Kirby, 1802, by original designation).
Evylaeus (Truncevylaeus) Pesenko, 2007a: 24 (type species: Halictus truncaticollis Morawitz, 1877, by original designation).
Diagnosis
In eastern Asia, the species of Hemihalictus series are classified into four subgenera (Acanthalictus, Dialictus, Hemihalictus, and Sphecodogastra). The subgenus Hemihalictus is separated from the other three subgenera by the following key:
1. Lower margin of male clypeus deflected forward; female labrum without basal elevation; basal elevation of male labrum stongly swollen, with longitudinal furrow; female mandible with two preapical teeth; male S2 gently swollen on apical part; male S6 expanded apically (Murao et al. 2014: figs 5–8, 15, 20) ........................................................................ Acanthalictus Cockerell, 1924
– Male clypeus normal, not deflected; female labrum with basal elevation (as in Fig. 4D); male labrum without basal elevation or with low basal elevation; female mandible with a preapical tooth; male S2 flat; male S6 straight apically ............................................................................................................ 2
2. Head and mesosoma with brilliant or dull green-metallic luster in both sexes (mesepisternum with shallow PP or reticulate PP in both sexes, see Murao et al. 2015b: figs 1e, 6e, 20e).......................... ................................................................................................................... Dialictus Robertson, 1902
– Body generally black ......................................................................................................................... 3
3. Posterior surface of propodeum generally with complete lateral carina (Murao 2017a: fig. 3b); mesepisternum with coarse reticulate-rugulae over entire surface (Murao 2017a: fig. 2c)................. ......................................................................................................... Sphecodogastra Ashmead, 1899
– Posterior surface of propodeum with incomplete lateral carina not reaching metapostnotum (Murao 2017a: fig. 3c); mesepisternum with shallow or reticulate PP (Fig. 2E; Murao 2017b: fig. 1d) ......... ............................................................................................................. Hemihalictus Cockerell, 1897
Three species, L. (Sphecodogastra) boreale Svensson, Ebmer & Sakagami, 1977, L. (S.) solisortus Ebmer & Maeta, 1994, and L. (S.) subtropicum Sakagami, Miyanaga & Maeta, 1994, from Japan are similar to L. (Hemihalictus) by having the posterior surface of the propodeum with an incomplete lateral carina (sometimes as variation) (Murao & Tadauchi 2007). However, these species can be separated from L. (Hemihalictus) by the mesepisternum with coarse reticulate-rugulae.
description: Published as part of Murao, Ryuki, 2021, Redefinition of the sexstrigatus group of Lasioglossum (Hemihalictus) Cockerell, 1897 (Hymenoptera, Apoidea, Halictidae), with a revision of Japanese species, pp. 1-74 in European Journal of Taxonomy 763 on pages 6-7, DOI: 10.5852/ejt.2021.763.1463, http://zenodo.org/record/5235968