Lasioglossum (Dialictus) miyabei Murao, Ebmer & Tadauchi, 2006 Lasioglossum (Dialictus), 1902

Murao, Ryuki, Tadauchi, Osamu & Lee, Heung-Sik, 2015, Synopsis of Lasioglossum (Dialictus) Robertson, 1902 (Hymenoptera, Apoidea, Halictidae) in Japan, the Korean Peninsula and Taiwan, European Journal of Taxonomy 137, pp. 1-50 : 40-45

Lasioglossum (Dialictus) miyabei Murao, Ebmer & Tadauchi, 2006

Figs 22 B–C, 23D, 28A

Lasioglossum (Evylaeus) miyabei Murao, Ebmer & Tadauchi, 2006: 42–46 (holotype: ELKU, ♀; type locality: Hokkaido, Japan).

Lasioglossum (Evylaeus) miyabei – Ebmer 2006: 564–565.

Evylaeus (Glauchalictus) miyabei – Pesenko 2007a: 26. — Pesenko 2007b: 85 (in key), 99 (in key), 114–115.

Diagnosis

This species is separated from other eastern Asian species of Lasioglossum (Dialictus) by a combination of the following character states: 1) head wider than long in both sexes (HL/HW ratio = 0.91–0.94 in female, = 0.94–0.98 in male); 2) metepisternum punctate in both sexes; 3) female metasomal terga dimly

shiny; 4) male metasomal sterna not modified and 5) and the structure of the male genitalia ( Murao et al. 2006; Fig. 9 A–E).

Material examined

JAPAN: Honshu: 2 ♀♀, 13 ♂♂, Ashiro, Iwate Pref., 19 Sep. 1976 (Y. Maeta, ELKU); 2 ♀♀, Nishikawacho, Yamagata Pref., 3 Jun. 2001 (K. Goukon, cGou); 1 ♂, Mt. Zao, Yokokawa-rindo, Miyagi Pref., 21 Aug. 2004 (K. Goukon, cGou); 1 ♂, Agano, Saitama Pref., 23 Oct. 1971 ( T. Nambu, ELKU); 1 ♂, Sengataki, Karuizawa, Nagano Pref., 27 Sep. 1972 (H. Suda, ELKU); 1 ♀, Mt. Haku-san, Ishikawa Pref., 30 Jul. 1962 (Y. Haneda, ELKU).

SOUTH KOREA: Gangwon-do: 1 ♀, Ohsaenk-ri, Yangyang-gun, 17 Apr. 1994 (O. Tadauchi, ELKU); 1 ♀, Taewallyong, Myongju-gun, 19 Apr. 1994 (O. Tadauchi, ELKU); 3 ♀♀, Mt. Gariwang-san, Jeongseon-gun, 30 Jul. 2013 ( R. Murao, cMur); 3 ♀♀, Mt. Gariwang-san, alt. 1100 m, 37°27’15” N 128°1’10” E, 10 Jun. 2013 (O. Tadauchi, ELKU); 4 ♀♀, Mt. Odae-san, alt. 900 m, 37°47’0” N 128°32’19 E, 9 Jun. 2013 (O. Tadauchi, ELKU); Mt. Odae-san, 1 ♀, 10 May 1996 (H.S. Lee, SNU), 1 ♀, 24 May 2002 (H.S. Lee, QIA); 1 ♀, Odaesanjang, Mt. Odae-san, Jinbueup, Pyengchang-gun, 24 Apr. 1997 (H.S. Lee, QIA). 14 ♀♀, Mt. Seokbyung-san, Imgye-ri, Imgyemyeon, Jeongseon-gun, 22 May 2002 (Y. Lee & J. Yeo, QIA); Baekdamsa temple, Mt. Seolak-san, Sokchosi, 1 ♀, 13 May 2010 (J. Jeong, QIA), 4 ♀♀, 6 Sep. 2010 (H.S. Lee, QIA); 1 ♀, Hwacheondong, Imgyemyeon, Jeongseon-gun, 24 Apr. 1997 (J. Son, QIA); 1 ♀, Hwang-i-ri, Seomyeon, Yangyang-gun, alt. 256 m, 37°56’25.8” N 128°31’19.7” E, 29 Apr. 2007 (H.S. Lee, QIA); Mt. Jeombong-san, 1 ♀, 28 Aug. 1999 (H. Kim, SNU), 1 ♀, 29 Aug. 1999 (H. Kim, SNU). Jeollabuk-do: 1 ♀, Jeonglyongchy, Sannaemeon, Namweon-gun, 14 May 1991 ( T. Saigusa, ELKU); 1 ♀, Sanlyong-ri, Sannao-myon, Namweon-gun, 29 Apr. 1992 (O. Tadauchi, ELKU). Gyeongsangnam-do: 1 ♀, Sam Jeong Li Ma Cheong Meon, Hamyang-gun, 15 May 1991 ( T. Saigusa, ELKU). Jeollanam-do: 1 ♀, Nogodan, Mt. Jiri-san, Gurye-gun, 26 May 1997 (H.S. Lee, QIA).

Distribution

Russian Far East (Primorsky), the Korean Peninsula (new record) and Japan (Hokkaido, Honshu, Shikoku, Kyushu, northern Ryukyus).

Flight period

Female: April to October.

Male: July to October.

Flower records

The floral records in Japan are reported as 36 species in 13 families by Murao et al. (2006). The specimens from South Korea were collected on the flowers of Aster ageratoides Turcz. (Asteraceae) , Potentilla verticillaris Stephan ex Willd. (Rosaceae) , Rhododendron mucronulatum Turcz. (Ericaceae) , Salix sp. ( Salicaceae ), Sisymbrium luteum (Maxim.) O.E. Schulz (Brassicaceae) , and Syringa sp. ( Oleaceae ).

Habitat

This species has been collected in mountain areas in both Japan and South Korea. One of the collecting sites (Mt. Gariwangsan) in South Korea is shown in Fig. 23C .

DNA barcodes

The COI gene sequences are deposited as DNA barcodes of L. (D.) miyabei in the DDBJ under accession number LC027536 . This number is also available in GenBank.

Comments

This species belongs to the atroglaucum group in the dissenting systematic study ( Murao et al. 2006; Pesenko 2007a, as subgenus Glauchalictus ). It differs, however, considerably with regard to the male character states of the atroglaucum group shown in the present study in having the metasomal sterna without unique hair tufts ( Fig. 28A ), S4 or S5 not modified ( Fig. 28A ), and the penis valve of male genitalia without a cleft on top. The systematic status of this species could not be decided in the present study. It will need to be correctly determined using phylogenetic analysis in a future study.

Key to female Lasioglossum (Dialictus) of Japan, the Korean Peninsula and Taiwan:

1. T1 basally covered with thin, appressed hairs ( Fig. 24A ) …………………………………………2

– T1 basally with sparse and erect hairs ( Fig. 24B ) …………………………………………………3

2. T1 usually with strong lineolation on basal to medial area ( Fig. 25A ) ……………………………… ……………………………………………… Lasioglossum (Dialictus) viridellum (Cockerell, 1931)

– T1 without lineolation or with weak lineolation on basal area ( Fig. 25B ) ……………………… ……………………………………………………………… L. (D.) pseudannulipes (Blüthgen, 1925)

3. Head wider than long (HL/HW ratio 0.91–0.94, n = 10) ……… L. (D.) miyabei Murao et al., 2006

– Head nearly as long as wide or longer than wide (HL/HW ratio 0.98–1.12, n = 30) ……………4

4. Mesepisternum reticulate punctate on lower area ( Fig. 20E ) ……………………………………5

– Mesepisternum sparsely shallow punctate on lower area (e.g., Fig. 6E ) …………………………6

5. Supraclypeus sparsely punctate as in Fig. 26A (IS = 1–4.7) ………………………………………… ………………………………………………………… L. (D.) meakanense Murao & Tadauchi, 2009

– Supraclypeus densely punctate as in Fig. 26B (IS = 1–2) …… L. (D.) ellipticeps (Blüthgen, 1923)

6. Mesoscutum posteriorly nearly smooth …………………………… L. (D.) yamanei Murao et al., 2006

– Mesoscutum posteriorly weakly or strongly tessellate ……………………………………………… ………… L. (D.) problematicum (Blüthgen, 1923) and L. (D.) virideglaucum Ebmer &Sakagami, 1994

Key to male Lasioglossum (Dialictus) of Japan, the Korean Peninsula, and Taiwan:

1. Clypeus without yellow spot; labrum with basal elevation depressed centrally ( Fig. 27A ) ………………… L. (D.) pseudannulipes (Blüthgen, 1923) and L. (D.) viridellum (Cockerell, 1931)

– Clypeus yellow on lower half; labrum without basal elevation ( Fig. 27B ) ………………………2 2. Hind tibia yellow basally and apically, tarsi yellow ………………………………………………3

– Legs black, without yellow coloration ………………………………………………………………4

3. Head wider than long (HL/HW ratio 0.94–0.98, n = 10); metasomal sterna with uniform and sparse hair, without hair tuft ( Fig. 28A ) ………………………………… L. (D.) miyabei Murao et al., 2006

– Head longer than wide (HL/HW ratio 1.07–1.12, n = 5); S5 laterally with moderately long hair tufts ( Fig. 28B ) ………………………………………… L. (D.) meakanense Murao & Tadauchi, 2009

4. S5 flat on whole surface, without apical depression …………………………………………………5

– S5 with shallow or deep apical depression ( Fig. 5B, E, H, K, N ) ……………………………………7

5. S4–S5 flat, laterally with moderately long hair tufts ( Fig. 20F ); penis valve of genitalia without cleft on top ( Fig. 21C ) …………………………………………… L. (D.) ellipticeps (Blüthgen, 1923)

– S4–S5 weakly swollen medially; S5 with brush-like hairs along apical margin ( Figs 13 , 14B, H ); penis valve of genitalia with cleft on top (e.g., Fig. 16C ) ………………………………………………6

6. Apical margin of S4 straight ( Fig. 14A ); gonostylus wider than that of L. alishanense ( Fig. 16C ) ……………………………………………………………… L. (D.) problematicum (Blüthgen, 1923)

– Apical margin of S4 incurved ( Fig. 14G ); gonostylus narrower than that of L. problematicum ( Fig. 18C ) …………………………………………………………… L. (D.) alishanense Murao sp. nov.

7. Apical margin of S5 incurved ………………………………………………………………………8

– Apical margin of S5 nearly straight …………………………………………………………………9

8. Clypeus dull, with strong tessellation; S5 gently incurved ( Fig. 5N ); gonostylus of genitalia small ( Fig. 11C ) …………………………………………………………… L. (D.) taiwanense Murao sp. nov.

– Clypeus more shiny, with weak tessellation; S5 deeply incurved ( Fig. 5H ); gonostylus of genitalia large ( Murao et al. 2006: fig. 11) …………………………………… L. (D.) yamanei Murao et al., 2006

9. S5 with a longitudinal, shallow groove ( Fig. 5K ) …………… L. (D.) negoroi Murao & Tadauchi, 2008

– S5 without groove …………………………………………………………………………………10

10. Hair pattern of S4 as in Fig. 4B; S 6 with a distinct pair of hair tufts ( Fig. 4B ); gonostylus of genitalia large ( Fig. 9C ) ………………………… L. (D.) virideglaucum Ebmer & Sakagami, 1994

– Hair pattern of S4 as in Fig. 4A; S 6 with sparse hairs ( Fig. 4A ); gonostylus of genitalia small and bud-like ( Fig. 7C ) …………………………………………… L. (D.) atroglaucum ( Strand, 1913)

Figures

Fig. 22. Distribution maps. A. Lasioglossum (Dialictus) ellipticeps (Blüthgen, 1923) in the Korean Peninsula. B–C. Lasioglossum (Dialictus) miyabei Murao et al., 2006 (B in the Korean Peninsula, C in Japan).

Fig. 9. Lasioglossum (Dialictus) virideglaucum Ebmer & Sakagami, 1994, ♂. A. Genitalia in ventral view. B. Genitalia in dorsal view. C. Genitalia in lateral view. D. Ventral retrorse lobe of genitalia. E. S7–S8. Scale bars: A–C, E = 0.2 mm, D = 0.1 mm.

Fig. 23. Habitats in Japan and South Korea. A. Takeshikakami-honiri, Ueda-shi, Nagano Pref., Japan. B. Matoishi wilderness, Aso-shi, Kumamoto Pref., Japan. C. Mt. Gariwangsan, Gangwon-do, South Korea. D. Lasioglossum (Dialictus) miyabei Murao et al., 2006, ♀ on flowers of Patrinia scabiosifolia Fisch. ex Trevir. in South Korea.

Fig. 28. Photographs for keys: hairs on metasomal sterna of male. A. Lasioglossum (Dialictus) miyabei Murao et al., 2006. B. L. (D.) meakanense Murao & Tadauchi, 2009.

Fig. 24. Photographs for keys: T1 of female. A. Lasioglossum (Dialictus) viridellum (Cockerell, 1931). B. L. (D.) virideglaucum Ebmer & Sakagami, 1994.

Fig. 25. Photographs for keys: T1 of female. A. Lasioglossum (Dialictus) viridellum (Cockerell, 1931). B. L. (D.) pseudannulipes (Blüthgen, 1925).

Fig. 20. Lasioglossum (Dialictus) ellipticeps (Blüthgen, 1923). A–B. Head. C–D. Labrum. E. Mese- pisternum. F. Hairs on metasomal sterna. A, C, E: ♀. B, D, F: ♂.

Fig. 6. Lasioglossum (Dialictus) atroglaucum (Strand, 1913), ♂. A. General habitus. B. Head in frontal view. C. Labrum. D. Mesoscutum. E. Mesepisternum. F. Metapostnotum.

Fig. 26. Photographs for keys: PP on supraclypeal area of female. A. Lasioglossum (Dialictus) meakanense Murao & Tadauchi, 2009. B. L. (D.) ellipticeps (Blüthgen, 1923).

Fig. 27. Photographs for keys: labrum of male. A. Lasioglossum (Dialictus) viridellum (Cockerell, 1931). B. L. (D.) problematicum (Blüthgen, 1923).

Fig. 5. S4–S6 in species of the atroglaucum subgroup, ♂. — A–C. Lasioglossum (Dialictus) atroglaucum (Strand, 1913). — D–F. Lasioglossum (Dialictus) virideglaucum Ebmer & Sakagami, 1994. — G–I. Lasioglossum (Dialictus) yamanei Murao et al., 2006 — J–L. Lasioglossum (Dialictus) negoroi Murao & Tadauchi, 2008, paratype. — M–O. Lasioglossum (Dialictus) taiwanense Murao sp. nov., paratype. A, D, G, J, M: S4. B, E, H, K, N: S5. C, F, I, L, O: S6. Dotted area on S5 shows the apical depression. Scale bars: 0.2 mm.

Fig. 21. Lasioglossum (Dialictus) ellipticeps (Blüthgen, 1923), ♂. A. Genitalia in ventral view. B. Genitalia in dorsal view. C. Genitalia in lateral view. D. Ventral retrorse lobe of genitalia. E. S7–S8. Scale bars: A–C, E = 0.2 mm, D = 0.1 mm.

Fig. 13. Hairs on metasomal sterna in species of the problematicum subgroup, ♂. A. Lasioglossum (Dialictus) problematicum (Blüthgen, 1923). B. Lasioglossum (Dialictus) sanitarium (Blüthgen, 1926). C. Lasioglossum (Dialictus) sichuanense Fan & Ebmer, 1992. D. Lasioglossum (Dialictus) alishanense Murao sp. nov., holotype.

Fig. 14. S4–S6 in species of the problematicum subgroup, ♂. A–C. Lasioglossum (Dialictus) problematicum (Blüthgen, 1923). D–F. Lasioglossum (Dialictus) sanitarium (Blüthgen, 1926). G–I. Lasioglossum (Dialictus) alishanense Murao sp. nov., paratype. A, D, G: S4. B, E, H: S5. C, F, I. S6: Dotted area on S5 shows the apical depression. Scale bars: 0.2 mm.

Fig. 16. Lasioglossum (Dialictus) problematicum (Blüthgen, 1923), ♂. A. Genitalia in ventral view. B. Genitalia in dorsal view. C. Genitalia in lateral view. D. Gonostylus in inner-lateral view. E. Ventral retrorse lobe of genitalia. F. S7–S8. Scale bars: A–C, F = 0.2 mm, D–E = 0.1 mm.

Fig. 18. Lasioglossum (Dialictus) alishanense Murao sp. nov., paratype, ♂. A. Genitalia in ventral view. B. Genitalia in dorsal view. C. Genitalia in lateral view. D. Ventral retrorse lobe of genitalia. E. S7–S8. Scale bars: A–C, E = 0.2 mm, D = 0.1 mm.

Fig. 11. Lasioglossum (Dialictus) taiwanense Murao sp. nov., paratype, ♂. A. Genitalia in ventral view. B. Genitalia in dorsal view. C. Genitalia in lateral view. D. Gonostylus in dorsal view. E. Ventral retrorse lobe of genitalia. F. S7–S8. Scale bars: A–C, F = 0.2 mm, D–E = 0.1 mm.

Fig. 4. Hairs on metasomal sterna in species of the atroglaucum subgroup, ♂. A. Lasioglossum (Dialictus) atroglaucum (Strand, 1913). B. Lasioglossum (Dialictus) virideglaucum Ebmer & Sakagami, 1994. C. Lasioglossum (Dialictus) yamanei Murao et al., 2006. D. Lasioglossum (Dialictus) negoroi Murao & Tadauchi, 2008, holotype. E. Lasioglossum (Dialictus) taiwanense Murao sp. nov., holotype.

Fig. 7. Lasioglossum (Dialictus) atroglaucum (Strand, 1913), ♂. A. Genitalia in ventral view. B. Genitalia in dorsal view. C. Genitalia in lateral view. D. Ventral retrorse lobe of genitalia. E. S7–S8. Scale bars: A–C, E = 0.2 mm, D = 0.1 mm.