Lasioglossum (Leuchalictus) denticolle ( Morawitz, 1891 )

Murao, Ryuki, Lee, Heung-Sik & Tadauchi, Osamu, 2015, Bees of the Lasioglossum series (Hymenoptera: Halictidae) in South Korea, with an illustrated keys to species, Zootaxa 4044 (4), pp. 511-534 : 521-522

Lasioglossum (Leuchalictus) denticolle ( Morawitz, 1891)

Figs. 2F, 5C, 7B

Halictus denticollis Morawitz 1891: 145 [Type series: Zoological Institute, Russian Academy of Sciences, St. Petersburg, Russia, ♀, type locality = Minusinsk (Krasnoyarsk Terr.), Russia, examined]. Lectotype [Zoological Institute, Russian Academy of Sciences, St. Petersburg, Russia] designated by Pesenko (1986: 139).

Halictus glycybromifer Strand 1915: 67 [Holotype: Deutsches Entomologisches Institut, Müncheberg, Germany, ♀, type locality =Tsingtau (now Qingdao, Shandong Prov.), China]. Synonymy by Blüthgen (1931a: 327. 1931b: 211).

Halictus laevifrons Blüthgen 1923: 324 [Type series: Institute of Systematic and Experimental Zoology, Polish Academy of Sciences, Krakow, Poland, ♀, type locality = Siberia, Russia]. Synonymy by Blüthgen (1934b: 300). Lectotype [Institute of Systematic and Experimental Zoology, Polish Academy of Sciences, Krakow, Poland] designated by Pesenko (2006: 152).

Halictus morbillosus r. orientis Cockerell 1924: 583 [Syntypes: American Museum of Natural History, New York, USA; U.S. National Museum of Natural History, Smithsonian Institution, Washington, DC, USA; Zoological Institute, Russian Academy of Sciences, St. Petersburg, Russia, ♀, type locality = Siberia (Primorsk Terr.), Russia]. Synonymy by Blüthgen (1931a: 326. 1931b: 211).

Lasioglossum (Lasioglossum) denticolle: Ebmer 1978a: 198 –199 [♂]; Ebmer & Maeta 1999: 243 [♀, photograph]. Lasioglossum (Leuchalictus) denticolle: Pesenko 1986: 139 [in key]; Pesenko 2006: 140 [in key], 141 [♂, illustration], 143 [♂, illustration], 144 [in key], 152.

Diagnosis. This species is similar to L. discum (Smith) from the Western Palaearctic Region and L. niveocinctum (Blüthgen) from central to eastern Asia. It is separated from both species by the dorsolateral angle of the female pronotum strongly developed (its apex distinctly exceeding the anterior margin of mesoscutum), and the tuft of hair on male S6 Ω shaped ( Fig. 7B ).

In contrast, in L. discum and L. niveocinctum , the dorsolateral angle of the female pronotum is weakly developed (its apex not or slightly exceeding the anterior margin of mesoscutum) and the tuft of hair on male S6 reverse V-shaped in L. discum ( Pesenko 2006, Fig. 35) and trapezoidal form in L. niveocinctum ( Pesenko 2006, Fig. 41).

In South Korean species, the hair tuft on male S6 of L. denticolle is also similar to L. formosae (Strand) , L. occidens (Smith) and L. subopacum (Smith) . However, the male of L. denticolle can be sepated from three allied species by the combination of the mesoscutum flat on medio-anterior margin (Fig. 2C) and sparsely punctate on medial and posterior areas (IS = 3 d in maximum; Fig. 5 C).

Specimens examined. (n = 8) [ South Korea] GW: 1♀, Hongcheon, 5. ix. 1984 (Y. Maeta, ELKU); 3♀ 1♂, Gamjong-ri, Dong-myon, Chunchon-gun, 23. vii. 1992 (K. Morimoto & K. Kanmiya, ELKU); 1♀, Bougmyong-ri, Dongsan-myon, Chunchong-gun, 21. vii. 1992 (K. Kanmiya, ELKU). GG: 1♂, Seolma-ri, Paju-si, 18. viii. 1984 (S.G. Kim, QIA). GG: 1♂, Seolma-ri, Paju-si, 18. viii. 1984 (S.G. Kim, QIA). JJ: 1♀, Jeju Island, 17. x. 2005 (R. Murao, ELKU).

Distribution. North Korea, South Korea (new record), China, Russian Far East, Siberia.

Flight period in South Korea. Female: July to October. Male: July to August.

Figures

FIGURE 7. A – D: hair tufts on S 6. A: Lasioglossum circularum Fan & Ebmer. B: L. denticolle (Morawitz). C: L. formosae (Strand). D: L. kansuense (Blüthgen). A – D: ♂.

FIGURE 5. A, B: basal area of T 1. C, D: mesoscutum. A: Lasioglossum nipponicola Sakagami & Tadauchi. B: L. kansuense (Blüthgen). C: L. denticolle (Morawitz). D: L. occidens (Smith). A – D: ♀.