Lasioglossum (Hemihalictus) tadauchii Murao, 2012

Murao, Ryuki, 2021, Redefinition of the sexstrigatus group of Lasioglossum (Hemihalictus) Cockerell, 1897 (Hymenoptera, Apoidea, Halictidae), with a revision of Japanese species, European Journal of Taxonomy 763, pp. 1-74 : 48

Lasioglossum (Hemihalictus) tadauchii Murao, 2012

Fig. 18D

Lasioglossum (Evylaeus) tadauchii Murao, 2012: 91 , figs 1–14 (♀) (holotype: ELKU, ♀, type locality =Nishinakama, Amami-Ôshima., Kagoshima Pref., Ryukyus, Japan, examined).

Diagnosis

Females are similar to L. (H.) taeniolellum . According to Murao (2012), this species is separated from L. (H.) taeniolellum by the postgena having distinct lineolation over entire surface, the distal process of labrum without lateral projection ( Murao 2012: fig. 5), and T1 with short hairs and fine PP on disc ( Murao 2012: fig. 7). In contrast, in L. (H.) taeniolellum , the lineolation on postgena does not reach the apical margin, the distal process of labrum with horn-like lateral projection ( Fig. 14D ), and T1 nearly smooth. Male unknown.

Distribution

Japan (central Ryukyus: Amami-Ohshima Is.).

Flight records

Female: April to October.

Flower records

Two species in two families were reported as floral records by Murao (2012).

Habitat

This species has been collected from around subtropical forests in mountainous area ( Murao 2012). It may prefer humid environments.

Figures

Fig. 18. Distribution maps. A. Lasioglossum (Hemihalictus) sphecodicolor Sakagami & Tadauchi, 1995. B. L. (H.) subsimplicior sp. nov. C. L. (H.) taeniolellum (Vachal, 1903). D. L. (H.) amamiense Ebmer & Sakagami, 1994 (red circle), L. (H.) ikudomei sp. nov. (purple circle), L. (H.) smilodon Ebmer & Sakagami, 1994 (light blue circle) and L. (H.) tadauchii Murao, 2012 (yellow circle).

Fig. 14. Lasioglossum (Hemihalictus) taeniolellum (Vachal, 1903). A. ♀, lateral habitus. B. ♀, head in frontal view. C. ♂, head in frontal view. D. ♀, labrum. E. ♀, mesoscutum. F. ♀, metapostnotum. Scale bars: A = 3 mm; B–C, E–F = 0.5 mm; D = 0.25 mm.