Lasioglossum (Dialictus) problematicum (Blüthgen, 1923)

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: 27-32

publication ID

http://dx.doi.org/10.5852/ejt.2015.137

publication LSID

lsid:zoobank.org:pub:0CB83C33-E198-4B4F-A8F6-96C59B066112

DOI

http://doi.org/10.5281/zenodo.3794621

persistent identifier

http://treatment.plazi.org/id/5A060122-0E06-FFEF-17C2-AF7487B7663E

treatment provided by

Carolina

scientific name

Lasioglossum (Dialictus) problematicum (Blüthgen, 1923)
status

 

Lasioglossum (Dialictus) problematicum (Blüthgen, 1923)  

Figs 13A View Fig , 14 View Fig A–C, 15, 16, 19A, 27B

Halictus problematicus Blüthgen, 1923: 331 –332   (lectotype: Institute of Systematic and Experimental Zoology, Polish Academy of Sciences, Krakow, Poland, ♀; type locality: unknown (Siberia?); designated by Pesenko, 2007b: 115).

Halictus problematicus   – Hirashima 1957: 15.

Lasioglossum (Evylaeus) problematicum   – Ebmer 1978: 311–312. — Ebmer 1996: 282; Ebmer 2002: 865–867 (♂). — Ebmer 2006: 563. — Murao et al. 2006: 50.

Evylaeus (Glauchalictus) problematicus   – Pesenko 2007a: 26. — Pesenko 2007b: 85 (in key), 95 (in key), 115.

Diagnosis

This species is closely related to Lasioglossum alishanense Murao   sp. nov., L. sanitarium (Blüthgen, 1926)   and L. sichuanense Fan & Ebmer, 1992   from the northern Oriental Region, as stated above. For the differences between this species and L. alishanense   , see the Key. It is also separated from the remaining two species by having the disc of the male S5 without an apical depression ( Fig. 14B View Fig ). The female cannot be clearly separated from the related species, as stated above.

Material examined

JAPAN: Hokkaido: 3 ♀♀, Rausu-seseki, Shiretoko, 16 Jun. 1984 (O. Tadauchi, ELKU); 3 ♂♂, Rebun Is., Rebun-no-oka, 7–8 Sep. 2005 (K. Goukon, cGou); 27 ♂♂, Kabuka, Rebun Is., 19 Aug. 1984 (O. Tadauchi, ELKU); 1 ♂, Air Port Wakkanai, 16 Aug. 1984 (O. Tadauchi, ELKU); 2 ♂♂, Botanical Garden, Sapporo, 3 Aug. 1959 (S. F. Sakagami & H. Fukuda, MNHAH); 1 ♂, Hamakoshimizu, 9 Aug. 1967 ( MNHAN); 10 ♂♂, Kami-Otoineppu, Nakagawa Exp. For., 14 Sep. 1969 (S. F. Sakagami & H. Fukuda, MNHAH); 1 ♂, Kitamoshiri, Hok. Uryu Exp. For., 14 Sep. 1969 (S. F. Sakagami & H. Fukuda, MNHAH); 2 ♂♂, Kussharo Lake, Teshikaga, 21 Jul. 1984 (O. Tadauchi, ELKU), 30 Aug. 1984 (O. Tadauchi, ELKU); 2 ♂♂, Nishiashoro, 9–10 Aug. 1955 (S. F. Sakagami & H. Fukuda, MNHAH); 1 ♂, Nissho Pass, Hidaka, 22 Sep. 1984 (O. Tadauchi, ELKU); 1 ♂, Cape Nosappu, Nemuro, 13 Sep. 1984 (O. Tadauchi, ELKU); 1 ♂, Nukabira, 10 Aug. 1965 (Y. Hirashima, ELKU); Sapporo, 1 ♂, 17 Aug. 1958, 4 ♂♂, 8 Sep. 1958 (S. Ueda, ELKU); 1 ♂, Shari Pass, Shari, 28 Jul. 1984 (O. Tadauchi, ELKU); 1 ♂, Shimamaki, Shiribetsu, 2 Sep. 1984 (O. Tadauchi, ELKU); 6 ♂♂, Shotoshibetsu, 20 Jul. 1984, 9 & 26 Aug. 1984 (O. Tadauchi, ELKU); 29 ♂♂, Sugatami, 6 Sep. 1967 ( MNHAH); 2 ♂♂, Tenneru, north Kushiro, 1968 (E. Ohtsuka, MNHAH); 4 ♂♂, Tokachimitsumata, Kamishihoro, 27 Aug. 1984, 11 Sep. 1984 (O. Tadauchi, ELKU); 6 ♂♂, Rubetu, Etorofu Is., 31 Aug. 1940 (S. Kuwayama & Y. Sugihara, ELKU); 13 ♂♂, Sibetoru, Etorofu Is., 6–7 Sep. 1940 (S. Kuwayama & Y. Sugihara, ELKU). Honshu: 4 ♂♂, Kuzukawa (Hiraka), Aomori Pref., 20 & 26 Aug. 1983 (M. Yamada, MNHAH); 1 ♂, Minami- Hakkoda (Hiraka), Aomori Pref., 17 Aug. 1984 (M. Yamada, MNHAH); 6 ♂♂, Mt. Iwaki, Aomori Pref., 7 & 21 Sep. 1980, 29 Aug. 1981 (M. Yamada, MNHAH); 4 ♂♂, Sukayu (Towadako), Aomori Pref., 2 Aug. 1987 (M. Yamada, MNHAH); 1 ♂, Takinosawa, Aomori Pref., 4 Sep. 1982 (M. Yamada, MNHAH); 1 ♂, Hachimantai, Akita Pref., 28 Jul. 1961 (M. Shiga, ELKU); 6 ♂♂, Mt. Akitakoma, Akita Pref., 28 Aug. 1972 (M. Honda, ELKU); 1 ♂, Mt. Chôkai-san, Akita Pref., 27 Aug. 1972 (M. Honda, ELKU); 1 ♂, Fukenoyu spa, Kazono city, Akita Pref., 2 Aug. 1974 ( T. & H. Suda, ELKU); 2 ♂♂, Mt. Zao, Shibakusadaira, Miyagi Pref., 27 Aug. 2004 (K. Goukon, cGou); 1 ♂, Mt. Zao, alt. 1300 m, Miyagi Pref., 28 Sep. 1996 (K. Goukon, cGou); 2 ♂♂, Mt. Zao, Miyagi Pref., 31 Aug. 1979 (K. Goukon, cGou), 24 Aug. 1979 (Y. Maeta, ELKU); 15 ♂♂, Kazawa, Nagano Pref., 17 Aug. 1972 (Y. Yoshiyasu, ELKU); 2 ♂♂, Shiga Highlands, Nagano Pref., 16 Aug. 1972 (Y. Yoshiyasu, ELKU); 2 ♂♂, Sugadaira Highlands, Sanada-machi, Nagano Pref., 22 Aug. 2002 (K. Mitai, cMur); 2 ♂♂, Asama, Karuizawa, Nagano Pref., 23 Aug. 1967 ( T. & H. Suda, ELKU); 1 ♂, Shirakaba Lake, Chino city, Nagano Pref., 7 Sep. 1966 ( T. & H. Suda, ELKU); 1 ♂, Arimine, Ôyama-machi, Toyama Pref., 11 Aug. 1994 (H. Negoro, MNHAH); 39 ♂♂, Migatahara, Mt. Tate-yama, Toyama Pref., 25 Aug. 2004 ( T. Sugimoto, cMur); 1 ♂, Mt. Daicho, Katsuyama-shi, Toyama Pref., 27 Aug. 2004 ( T. Sugimoto, cMur); 1 ♂, Sen-ninmori, near Mt. Ikenodaira, north Alps, Toyama Pref., 19 Aug. 2005 (H. Hirano, cMur); 1 ♂, Tateyama-Migatahara, Toyama Pref., 16 Oct. 1995 (H. Negoro, MNHAH); 2 ♂♂, Mt. Haku-san, Ishikawa Pref., 6 Aug. 1970 (K. Kanmiya, ELKU), 9 Aug. 1974 (I. Togashi, ELKU); 1 ♂, Mt. Haku-san, alt. 1750– 1500 m, Ishikawa Pref., 22 Aug. 1988 (I. Togashi, ELKU).

Additional description

LABRUM ( Fig. 15 View Fig C–D). Basal area approximately 2.3 × as wide as long in female, 3 × in male; basal elevation of female moderately developed, that of male absent; distal process of female slender, nearly as long as basal area, and without lateral projection, that of male absent; keel of distal process narrow, apically pointed; labral fimbria acutely pointed at apex in both sexes.

STERNA. S4 medially with shallow groove on apical half; apical margin nearly straight. S5 without apical depression, medially weakly swollen and apico-medially cleaved; apical margin gently incurved. S6 normally shaped, not modified. S7–S8 ( Fig. 16F View Fig ): S7 with elongate, apically rounded median process, apex exceeding S8; S8 without median process.

MALE GENITALIA ( Fig. 16 View Fig A–E). Gonobase nearly flat at bottom, ventral arms connected with each other at upper ends; gonocoxite smooth, gently sloped in lateral view, and inner dorsal margin gently angulate at approximately basal 1/3; gonostylus large, located at top of gonocoxite, with dense short setae on inner surface; ventral retrorse lobe moderately long but not reaching gonobase, with dense short setae ventrally and relatively long blunt setae laterally; penis valve higher than gonocoxite, with high cleft on top.

Distribution

Russian Far East (Sakhalin) and Japan (Hokkaido, northern to central Honshu). Ebmer (1978, 2006) recorded this species from Primorsky and North Korea, respectively, based on female specimens. These records are not included in this paper, because the female cannot be clearly separated from that of some of the related species.

Flight period

Female: May to September in Hokkaido, Japan.

Male: August to October.

The flight record of females is based on specimens collected from the eastern part of Hokkaido, Japan. This record can be considered accurate, because one of the related species, L. virideglaucum Ebmer & Sakagami   , does not sympatrically inhabit this area.

Flower records

In Japan this species visits the following 19 species in 6 families: Apiaceae   : Angelica ursina (Rupr.) Maxim.   Asteraceae   : Anaphalis margaritacea   (L.) Benth. & Hook. f. subsp. margaritacea   ; Aster glehnii F. Schmidt   ; Cirsium setosum (Willd.) M. Bieb.   ; Crepidiastrum denticulatum (Houtt.) J.H. Pak & Kawano   ; Erigeron annuus   (L.) Pers.; Hieracium umbellatum   L.; Picris hieracioides subsp. japonica (Thunb.) Krylov   ; Rudbeckia laciniata   L.; Senecio pseudoarnica Less.   ; Solidago altissima   L.; S. virgaurea   L. subsp. asiatica (Nakai ex H. Hara) Kitam. ex H. Hara var. asiatica Nakai ex H. Hara   ; S. virgaulea   L. subsp. leiocarpa (Benth.) Hultén   ; Sonchus brachyotus   DC.; Taraxacum   sp. Brassicaceae   : Barbarea orthoceras Ledeb.   Geraniaceae   : Geranium thunbergii Siebold ex Lindl. & Paxton.   Lamiaceae   : Isodon   sp. Rosaceae   : Sorbaria sorbifolia   (L.) A. Braun.

Biological reference

According to Sakagami & Kuribayashi (1979) and Sakagami et al. (1984), some biological information is available. Nest place and structure: the female prefers to make a nest at the forest edge; the nest structure is the IIIa type of Sakagami & Michener (1962). Social structure and life cycle: the brooding period of the overwintered generation is from early May to late July, in Sapporo city, Hokkaido; most of the overwintering females stay communally in the natal nests; the nest are communally reused in the next brooding season, hence many colonies are semisocial or sometimes delayed eusocial from the beginning of spring activities; females living in the same nests are mostly of the same generation and seem to be sisters in most cases, although some nests are inhabited by a two-year-old female and her daughters; all cohabiting females are inseminated, but only one of them has fully developed ovaries at the peak of brooding season, the others with undeveloped ovaries participate in foraging.

T

Tavera, Department of Geology and Geophysics

Kingdom

Animalia

Phylum

Arthropoda

Class

Insecta

Order

Hymenoptera

Family

Halictidae

Genus

Lasioglossum

Loc

Lasioglossum (Dialictus) problematicum (Blüthgen, 1923)

Murao, Ryuki, Tadauchi, Osamu & Lee, Heung-Sik 2015
2015
Loc

Halictus problematicus Blüthgen, 1923: 331 –332

Pesenko Y. A. 2007: 115
2007
Loc

Evylaeus (Glauchalictus) problematicus

Pesenko Y. A. 2007: 26
Pesenko Y. A. 2007: 85
2007
Loc

Lasioglossum (Evylaeus) problematicum

Ebmer A. W. 2006: 563
Murao R. & Ebmer A. W. & Tadauchi O. 2006: 50
Ebmer A. W. 2002: 865
Ebmer A. W. 1996: 282
Ebmer A. W. 1978: 311
1978
Loc

Halictus problematicus

Hirashima Y. 1957: 15
1957