Bombus (Pyrobombus) koropokkrus Sakagami & Ishikawa, 1972

Williams, Paul H., Dorji, Phurpa, Ren, Zongxin, Xie, Zhenghua & Orr, Michael, 2022, Bumblebees of the hypnorum-complex world-wide including two new near-cryptic species (Hymenoptera: Apidae), European Journal of Taxonomy 847, pp. 46-72 : 62-63

Bombus (Pyrobombus) koropokkrus Sakagami & Ishikawa, 1972 stat. rev.

Figs 1–2 , 27‒31

Bombus (Pyrobombus) hypnorum [ssp.] insularis Sakagami & Ishikawa, 1969: 180 , not of Smith (1861) (= B. (Apathus) insularis Smith, 1861 ). Type not seen, but identity not in doubt.

Bombus (Pyrobombus) hypnorum [ssp.] koropokkrus Sakagami & Ishikawa, 1972: 610 , replacement name for insularis Sakagami & Ishikawa (1969) .

Diagnosis

Female

Distinguished by the combination: clypeus in the centre with widely scattered large punctures with fewer small punctures between them; ocello-ocular area along the inner eye margin with a broad band of sparse medium and small punctures; thoracic dorsum with the hair orange-brown; T5 hair usually entirely white, but sometimes only along the posterior margin; T5 posteriorly in the middle anterior to the smooth posterior margin with a broad band of large punctures extending for at least a quarter of the length of the tergum.

Male

Distinguished by the combination: hair of the thorax and metasomal T1‒4 yellow.

Material examined

Material sequenced or examined

RUSSIA • 1 ♀ (queen); Sakhalin, Sokol ; 47.2553° N, 142.8062° E; [alt. 69 m]; 17 Jul. 2001; D. Bennett leg.; BOLD-1552F02 ; PW • 1 ♂; Sakhalin, Yuzhno-Sakhalinsk ; 46.7148° N, 142.7338° E; [alt. 8 m]; 16 Aug. 2000; K. Blackhart leg.; BOLD-1552F05 ; PW .

JAPAN • 1 ♀ (worker); Hokkaido, Rausu spa; 29 Jul; 1959; K. Moriya leg.; PW • 1 ♀ (worker); Hokkaido, Yukomanbetsu ; 8 Jul. 1967; M. Ito leg.; PW • 1 ♂; Hokkaido, Kawayu ; alt. 650 m; S. Martin leg.; PW .

Other material sequenced

GenBank: AF385815 , HQ553056 .

Distribution

Islands of Japan (Hokkaido) and Sakhalin ( Sakagami & Ishikawa 1969), at elevations of 0‒ 650 m.

Figures

Fig. 1. MRBAYES estimate of phylogeny as a metric tree (outgroup B. alpinus (Linnaeus, 1758) not shown) from COI barcodes from GenBank and BOLD databases for the vagans-group and hypnorum- group, with additions from the authors for the hypnorum-group of bumblebees, filtered to remove duplicate and short sequences. Each sequence is labelled with: sequence length; a taxon name from the database; a code consisting of a sequence identifier from the project database and a specimen identifier from the online database; its country and (for larger countries) state or province). The scale bar is calibrated in substitutions per nucleotide site. Results of Bayesian Poisson-tree-process (PTP) models applied for assessing support for species’ gene coalescents by maximum likelihood are shown as PTP scores above the branches: scores approaching 1 and where branches change from blue to red indicates are where the most likely species’ gene coalescents are detected. Asterisks mark sequences used as informal proxies for the type specimens of each of the taxon names in Table 2.

Fig. 2. Distribution of barcoded samples of the hypnorum-complex and B. perplexus Cresson, 1863, with the interpretations as separate candidate species from Fig. 1 shown as different coloured spots as per the colour key on the left. Relief map with hill shading, polar projection (north pole shown as a star), the international boundaries and the Arctic Circle are shown as narrow grey lines, and the northern tree line shown as a broad grey line. Image created in ArcGIS using World_Shaded_Relief basemap (© 2014 Esri).

Figs 3–38. Simplified diagrams for the colour patterns of the hair on the dorsum for ♀♀ (left) and ♂♂ (right) of the Bombus species from Fig. 2. The dorsum is divided into regions, each of which shows only the predominant or most apparent colour for that region using a simplified colour palette (precise shades vary), with olive indicating a mixture of black and yellow hair, and grey indicating a mixture of black and white hair.