Bombus eximius Smith, 1852

Williams, Paul H., Altanchimeg, Dorjsuren, Byvaltsev, Alexandr, Jonghe, Roland De, Jaffar, Saleem, Japoshvili, George, Kahono, Sih, Liang, Huan, Mei, Maurizio, Monfared, Alireza, Nidup, Tshering, Raina, Rifat, Ren, Zongxin, Thanoosing, Chawatat, Zhao, Yanhui & Orr, Michael C., 2020, Widespread polytypic species or complexes of local species? Revising bumblebees of the subgenus Melanobombus world-wide (Hymenoptera, Apidae, Bombus), European Journal of Taxonomy 719, pp. 1-120 : 39-47

publication ID

https://doi.org/10.5852/ejt.2020.719.1107

publication LSID

lsid:zoobank.org:pub:A4500016-C219-4353-B81C-5E0BB520547F

persistent identifier

https://treatment.plazi.org/id/252087CA-1F64-9517-FDED-FA26DFFDF840

treatment provided by

Valdenar

scientific name

Bombus eximius Smith, 1852
status

 

Bombus eximius Smith, 1852

Figs 1 View Figs 1‒6 , 12 View Figs 12‒13 , 25–34 View Figs 25–63 , 181 View Figs 181‒189

Bombus eximius Smith, 1852a: 47.

Bombus latissimus Friese, 1910: 404.

Bombus rufipes var. [subsp.] tonkinensis Friese, 1914: 11.

Bombus latissimus var. [subsp.] detritus Friese, 1916: 109.

Bombus latissimus var. [subsp.] segmentarius Friese, 1916: 109.

Bombus latissimus var. [subsp.] tricoloratus Friese, 1916: 109.

Bombus rufipes var. [subsp.] lutescens Friese, 1918: 517 (non Pérez, 1890: 154 = B. flavidus Eversmann).

Bombus discrepans Pendlebury, 1923: 64.

Bombus geei subsp. nigribasis Cockerell, 1931: 5 .

Bombus eximius var. [subsp.] fulvobrunneus Chiu, 1948: 65.

Bombus eximius var. [subsp.] pallidus Chiu, 1948: 66 (non Cresson, 1863: 92 = B. pensylvanicus (DeGeer)).

Bombus rufipes var. tonkininsis – Friese 1918: 527, incorrect subsequent spelling.

Bombus latiszimus – Friese 1931: 304, incorrect subsequent spelling.

Bombus eximius and B. rufipes have a distinctive morphology and previously were placed in a separate subgenus, Rufipedibombus ( Skorikov 1923) . A close relationship with other species of the subgenus Melanobombus was supported by an analysis of five genes by Cameron et al. (2007) and these subgenera were then synonymised by Williams et al. (2008).

Our PTP analysis ( Fig. 10 View Fig ) of coalescents in the COI gene within the rufipes- group supports two species B. eximius and B. rufipes, corroborated by differences in morphology. It supports as conspecific within B. eximius s. lat. the individuals from Taiwan that may have much of the hair of T2–6 orange (taxon latissimus), the individuals from southern China and Southeast Asia that often have T2–3 predominantly black and T4–6 orange, and the individuals from the Himalaya that have T2–4 black and T5–6 either orange or black (taxon eximius s. str.).

Diagnosis

Females ( Fig. 1 View Figs 1‒6 )

Queens very large body length 23–30 mm, workers 13–20 mm. Can be distinguished by their combination of wings yellow with the veins orange (cf. B. rufipes), the hair and integument of mid and hind tibiae and of all barsitarsi orange (cf. some B. rufipes). The labral lamella has the anterior edge broad and nearly straight (cf. B. (Pyrobombus) flavescens Smith, 1852, B. (Alpigenobombus) genalis Friese, 1918).

Males

Body length 16–19 mm. Can be distinguished by their combination of wings yellow with the veins orange (cf. B. rufipes), similarly coloured to the worker but with the hair of the face black intermixed with grey (cf. B. rufipes) and the thoracic dorsum black or sometimes intermixed with grey (cf. B. festivus). Genitalia ( Fig. 181 View Figs 181‒189 ) with the gonostylus reduced to a transverse ‘S’-shaped band (cf. non- rufipes -group), the proximal inner projection not broadened distally and simple (cf. B. rufipes); volsella projecting beyond the gonostylus by ca 6 × its breadth at its midpoint (cf. B. rufipes), and without an obvious inner distal process or hook (cf. non- rufipes -group); penis valve head with the outer flange greatly expanded as a triangular projection (cf. non- rufipes -group); eye unenlarged relative to female eye.

Material examined

Holotype

BANGLADESH • ♀ (queen), holotype of Bombus eximius Smith, 1852 by monotypy ( Williams et al. 2009); “ Silhet ” [= Sylhet]; NHMUK (examined PW).

Material sequenced (7 specimens)

THAILAND • 1 ♀ (worker); Chiang Mai, Doi Inthanon ; 18.553º N, 98.48º E; 2 Feb. 2007; Y. Areeluck leg.; BOLD seq: 3773E10; PCYU: ML180 View Materials GoogleMaps 1 ♀ (worker); same collection data as for preceding; 16 Feb. 2007; Y. Areeluck leg.; BOLD seq: 3773E11; PCYU: ML195 View Materials GoogleMaps 1 ♀ (worker); Chaiyaphum, Tat Tone NP; 15.988º N, 102.041º E; 12 Oct. 2006; Y. Areeluck leg.; BOLD seq: 3261H06; PCYU: ML196 View Materials GoogleMaps .

CHINA • 1 ♀ (queen); Guangdong; 22.2933º N, 111.2061º E; 16 Jan. 2013; BOLD seq: 1555A07; PW: ML178 GoogleMaps 1 ♀ (worker); Chongqing; 30.13º N, 108.1018º E; Aug. 2010; BOLD seq: 1555A08; PW: ML179 GoogleMaps .

TAIWAN • 1 ♀ (queen); Taichung, Dashuishan road; 24.2561º N, 121.0108º E; 18 Jun. 2004; C. Dietrich leg.; BOLD seq: 1555A06; PW: ML177 GoogleMaps .

BURMA • 1 ♀ (worker); Chin, Natmataung ; 21.2198º N, 93.9401º E; 2 Jun. 2010; D. Zimmermann leg.; BOLD seq: 6880E04; NHMW: ML502 View Materials GoogleMaps .

Global distribution

(Himalayan, south Chinese and southeast Asian mountain species including some of the northern islands) East Asia: CHINA: Xizang, Sichuan, Yunnan, Chongqing, Jiangxi, Guizhou, Fujian, Guangdong, Guangxi, Taiwan. – Himalaya: INDIA: Sikkim, Darjiling Bengal, Arunachal Pradesh, Meghalaya; NEPAL, BHUTAN. – Southeast Asia: BANGLADESH, BURMA, THAILAND, VIETNAM. ( IAR, IOZ, KIZ, NHMUK, NHMW, NME, PCYU, PW, RMNH, SEHU, SMNS, USNM, ZMHB, ZMUM.) The species is widely distributed but not common in collections.

Behaviour

Expected to be food-plant generalists ( Kjellsson et al. 1985).

NHMUK

Natural History Museum, London

PW

Paleontological Collections

PCYU

The Packer Collection at York University

NHMW

Naturhistorisches Museum, Wien

KIZ

Kunming Institute of Zoology, Chinese Academy of Sciences

NME

Sammlung des Naturkundemseum Erfurt

RMNH

National Museum of Natural History, Naturalis

SMNS

Staatliches Museum fuer Naturkund Stuttgart

USNM

Smithsonian Institution, National Museum of Natural History

ZMUM

Zoological Museum, University of Amoy

Kingdom

Animalia

Phylum

Arthropoda

Class

Insecta

Order

Hymenoptera

Family

Apidae

Loc

Bombus eximius Smith, 1852

Williams, Paul H., Altanchimeg, Dorjsuren, Byvaltsev, Alexandr, Jonghe, Roland De, Jaffar, Saleem, Japoshvili, George, Kahono, Sih, Liang, Huan, Mei, Maurizio, Monfared, Alireza, Nidup, Tshering, Raina, Rifat, Ren, Zongxin, Thanoosing, Chawatat, Zhao, Yanhui & Orr, Michael C. 2020
2020
Loc

Bombus eximius

Chiu S. C. 1948: 65
1948
Loc

Bombus eximius

Chiu S. C. 1948: 66
Cresson E. T. 1863: 92
1948
Loc

Bombus geei subsp. nigribasis

Cockerell T. D. A. 1931: 5
1931
Loc

Bombus discrepans

Pendlebury H. M. 1923: 64
1923
Loc

Bombus latissimus

Friese H. 1916: 109
1916
Loc

Bombus latissimus

Friese H. 1916: 109
1916
Loc

Bombus latissimus

Friese H. 1916: 109
1916
Loc

Bombus rufipes

Friese H. 1914: 11
1914
Loc

Bombus latissimus

Friese H. 1910: 404
1910
Loc

Bombus rufipes

Perez J. 1890: 154
1890
Loc

Bombus eximius

Smith F. 1852: 47
1852