Lasioglossum (Hemihalictus) subsimplicior, Murao, 2021

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 : 45-48

Lasioglossum (Hemihalictus) subsimplicior sp. nov.

urn:lsid:zoobank.org:act:D4408B7F-6A84-4BB2-8B5D-8B9FDF35E031

Figs 13 , 16E , 18B

Diagnosis

Females are similar to L. (H.) simplicior but are separated from them by the lineolation of T1 interrupted in part ( Fig. 16E ). In contrast, in L. (H.) simplicior , the lineolation of T1 is present across the entire surface ( Fig. 15E ).

Etymology

The specific name is derived from this species’ similarity to L. (H.) simplicior ( Cockerell, 1931) .

Material examined

Holotype JAPAN – Kyushu • ♀; Oita Pref., Kusu-gun, Kokonoe-machi , Chojyabaru ; 33°7′6.773″ N, 131°13′49.331″ E; 1050 m a.s.l.; 13 Aug. 2010; Y. Murao leg.; ELKU. [Verbatim label: JAPAN: Kyushu / Chojyabaru/ Kokonoe-machi /Kusu-gun / Oita Pref./ 13. VIII. 2010 / Yumi Murao leg. / / HOLOTYPE / / Lasiioglossum (Hemihalictus) subsimplicior Murao ]

Paratypes JAPAN – Hokkaido • 4 ♀♀; Antaroma-Aizankei (Ishikari); 26 Jul. 1952; T. Shirôzu leg.; ELKU. – Honshu • 1 ♀; Ishikawa Pref., Negami-machi , Yamaguchi; 29 Aug. 1996; I. Togashi leg.; ELKU. – Kyushu • 1 ♀; Oita Pref., Kokonoe-machi, Chojyabaru ; 33°7′6.773″ N, 131°13′49.331″ E; 1050 m a.s.l.; 13 Aug. 2010; R. Murao leg.; cMur • 2 ♀♀; Oita Pref., Kusu-gun, Kokonoe-machi, Handa-kogen ; 33°7′58.702″ N, 131°14′2.412″ E; 9 Jul. 2013; R. Murao leg.; ELKU • 1 ♀; Oita Pref., Takeda, Nagayu ; 28 Apr. 2009; O. Tadauchi leg.; ELKU • 1 ♀; Oita Pref., Mt Kuju ; 9 May 2009; O. Tadauchi leg.; ELKU • 2 ♀♀; same location as for preceding; 23 May 2009; O. Tadauchi leg.; ELKU • 2 ♀♀; Oita Pref., Shimohanda ; 12 Apr. 1975; O. Tadauchi leg.; ELKU • 1 ♀; Miyaji-Bochu (Mt Aso); 23 Jun. 1959; Y. Hirashima leg.; ELKU • 1 ♀; Kumamoto Pref., Aso-machi, Aso ; 28 May 2001; A. Yamada leg.; ELKU • 1 ♀; same location as for preceding; 16 Jun. 2001; A. Yamada leg.; ELKU • 1 ♀; Miyazaki Pref., Takachiho-cho, Gokasyo-Sobosan ; 27 Apr. 2003; F. Kodoi leg.; ELKU • 2 ♀♀; Miyakonojo- Hyuga, Nakao ; 13 Apr. 1958; Y. Hirashima leg.; ELKU • 2 ♀♀; Makizono (Satsuma); 11 Apr. 1959; Y. Hirashima leg.; ELKU • 2 ♀♀; Kagoshima; 4 Apr. 1949; Y. Hirashima leg.; ELKU • 1 ♀; Sata (Osumi) Magome-Hetsuka ; 24 May 1952; T. Esaki and Y. Hirashima leg.; ELKU • 1 ♀; Kagoshima Pref., Kiire-machi, Kiire ; 31 Mar. 1975; O. Tadauchi leg.; ELKU • 1 ♀; Kagoshima Pref., Miyakonojo ; 29 Mar. 1959; Y. Maeta leg.; ELKU. – Ryukyus • 1 ♀; Kagoshima Pref., Yaku-shima, Onoaida ; 40– 200 m a.s.l.; 27 Jul. 1982; S. Ikudome leg.; KWC .

SOUTH KOREA – Jeollabuk-do • 1 ♀; Namweon-gun , Sannae-myon , Sanlyong-ri ; 14 May 1991; O. Tadauchi leg.; ELKU . – Gyeongsangnam-do • 1 ♀; Hamyang-gun , Macheongmeon , Samjeong-ri ; 12 May 1991; T. Saigusa leg.; ELKU .

Description

Female

MEASUREMENTS (n =5, unit mm). BL =5.00–5.63 (5.45± 0.27), WL= 4.63–5.00 (4.80 ± 0.14), HL=1.55– 1.65 (1.59 ±0.04), HW= 1.61–1.74 (1.69± 0.05), IOD =0.27–0.29 (0.28 ± 0.01), OOD=0.26–0.29 (0.28 ± 0.01), OCD =0.19 (0.19 ±0.00), UOD =1.00–1.06 (1.02 ±0.03), MOD =1.16–1.26 (1.21 ±0.04), LOD =0.87–0.94 (0.89 ± 0.03), IAD =0.13–0.15 (0.14± 0.01), AOD=0.29–0.31 (0.30 ±0.01), CAL =0.27–0.29 (0.29± 0.01), CPL=0.32–0.34 (0.34 ± 0.01), EL= 1.85–1.90 (1.88± 0.03), EW=0.42– 0.48 (0.46 ± 0.03), GW=0.29–0.32 (0.31 ±0.02), SPL=0.63–0.68 (0.65 ±0.02), F1L=0.08–0.10 (0.09 ± 0.01), F2L =0.08 (0.08± 0.00), F3L= 0.08 (0.08± 0.00), F2W=0.13–0.15 (0.14 ± 0.01), MsW = 1.85–2.10 (1.98 ±0.09), SCL= 0.40–0.45 (0.42 ± 0.03), MNL=0.23–0.25 (0.25± 0.01), MPL =0.28–0.30 (0.28 ±0.01), MtW=1.95–2.15 (2.04 ± 0.07).

COLORATION. Body black except for the following parts: mandible reddish brown apically; F4–F10 yellowish brown (holotype and 18 paratypes) or brown (reamining paratypes) ventrally; tegula yellowish brown translucent; tibial spur yellow; metasomal terga broadly yellowish brown translucent apically. Wings transparent, veins and stigma brown.

PUBESCENCE. Body hairs whitish, and covered with erect and sparse straight or fine branched hairs except for the following parts: pronotal dorsum to lobe and metanotum moderately densely tomentose; hind trochanter, femur, and tibia mixed with plumose hairs, forming scopa. Disc of T1 with sparse short hairs on medial area. Discs of T2–T4 with moderately dense short hairs over entire surface.

STRUCTURE AND SCULPTURE HEAD. Wider than long; HW:HL= 1:0.94. Vertex rounded in frontal view. MOD:UOD:LOD =1:0.84:0.74. IOD:OOD:OCD =1:0.99:0.69. IAD:AOD = 1:2.11. Ocellocular area densely puctate, IS nearly smooth (IS = 0.5–2 d). Paraocular area and frons weakly shiny, with shallow reticulate PP. Supraclypeal area slightly convex, dimly shiny, with dense PP; IS distinctly tessellate (IS= 0.5–2 d). CPL:CAL=1:0.86. Clypeus nearly flat, with dense PP on upper half and larger shallow PP on lower half; IS nearly smooth over entire surface (IS =0.5–1 d on upper half). EW:GW =1:0.68. Genal area to postgena with straight ridges. Malar space linear. Occiput not carinate. Hypostomal carinae nearly parallel. Mandible bidentate. Labrum ( Fig. 13C ): basal area approximately 2 × as wide as long; distal process approximately 0.7× as long as basal area, narrow, and without lateral projection; distal keel narrow, pointed apically. Antenna short, not reaching metasoma. F2L:F2W=1:1.76; flagellum nearly flattened ventrally.

THOIRAX. Dorsolateral angle of pronotum obtuse; lateral surface without ridges; lateral lobe rounded. Tegula ovoid, nearly smooth. Mesoscutum ( Fig. 13D ) with dense PP over entire surface; IS distinctly tessellate nearly over entire surface (but weakly tessellate on posterior margin) (IS=0.5–2 d); parapsidal line a narrow groove. Mesoscutellum with moderately dense PP over entire surface; IS weakly tessellate over entire surface (IS = 0.5–3 d in paratypes). Metanotum weakly rugulose. Mesepisternum with reticulate PP on upper area and weak rugulae on lower area. SCL:MNL:MPL= 1:0.58:0.67. Propodeum: metapostnotum ( Fig. 13E ) weakly shiny and gently inclined, with straight ridges reaching to near posterior margin; junction between metapostnotum and posterior surface not carinate, weakly tessellate; lateral surface weakly rugulose and distinctly tessellate; posterior surface with lateral carina on lower half, without oblique carina. Coxae normal shape, without tubercle. Fore trochanter narrow, longer than wide. Basitibial plate of hind leg carinate marginally. Inner hind tibial spur with 3–4 slender teeth (n=27). Fore wing with three submarginal cells.

ABDOMEN. Disc of T1 with weak lineolation interrupted on medial area ( Fig. 16E ), and with sparse fine PP on medial area; submedian patch distinct and nearly smooth. Disc of T2–T3 with very weak lineolation on apical half, and without lineolation on basal half. T4 very weakly lineolate over entire surface.

Male

Unknown.

Distribution

Japan (Hokkaido, Honshu, Kyushu, northern Ryukyus), Korean Peninsula.

Flight period

Female: late March to August.

Flower records

Brassica rapa L. var. oleifera DC. (Brassicaceae) , Eleutherococcus sp. (Araliaceae) , Erigeron annuus (L.) Pers. ( Asteraceae ), Ixeridium dentatum (Thunb.) Tzvelev subsp. dentatum (Asteraceae) .

Habitat

This species has been collected mainly from mountainous areas in western Japan. One of the collecting sites in Japan is shown in Fig. 19A .

Figures

Fig. 13. Lasioglossum (Hemihalictus) subsimplicior sp. nov., ♀. A. Lateral habitus. B. Head in frontal view. C. Labrum. D. Mesoscutum. E. Metapostnotum. Scale bars: A = 3 mm; B = 1 mm; C = 0.25 mm; D–E = 0.5 mm.

Fig. 16. 1st metasomal tergum, ♀. A–B. Lasioglossum (Hemihalictus) spectrum sp. nov. C. L. (H.) speculinum (Cockerell, 1925). D. L. (H.) sphecodicolor Sakagami & Tadauchi, 1995. E. L. (H.) subsimplicior sp. nov. F. L. (H.) taeniolellum (Vachal, 1903). Scale bars: 1 mm.

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. 15. 1st metasomal tergum, ♀. A. Lasioglossum (Hemihalictus) frigidum Sakagami & Ebmer, 1996. B. L. (H.) ikudomei sp. nov. C. L. (H.) kiautschouense (Strand, 1910). D. L. (H.) ohei Hirashima & Sakagami, 1966. E. L. (H.) simplicior (Cockerell, 1931). F. L. (H.) smilodon Ebmer & Sakagami, 1994. Scale bars: 1 mm.

Fig. 19. Habitat in Japan. A. Chojyabaru, Kokonoe-machi, Kusu-gun, Oita Pref., Kyushu, Japan. B. Kyushu Univ., Hikosan Exp. St., Soeda-machi, Fukuoka Pref., Kyushu, Japan. C. Kyushu Univ., Hakozaki, Higashi-ku, Fukuoka-shi, Fukuoka Pref., Kyushu Japan. D. Nigino-hama, Itoshima-shi, Fukuoka Pref., Kyushu, Japan.