Antherophagus suturalis Mäklin, 1853

Kole, John Paul & Ivie, Michael A., 2023, New US State and County Records for Members of the Genus Antherophagus Dejean, 1821 (Coleoptera: Cryptophagidae) with Notes on Biology, The Coleopterists Bulletin 77 (3), pp. 307-318 : 313-314

Antherophagus suturalis Mäklin, 1853 ( Figs. 9–12 , 23 )

Antherophagus suturalis Mäklin in Mannerheim 1853: 208; Crotch 1880: 43; Wheeler 1919: 145; Leng 1920: 202; Hatch 1962: 210; Arnett 1975: 4; Bousquet 1989: 13; Pelletier and Hébert 2019: 164.

Diagnosis. Length 3.0– 4.5 mm; overall coloration variable, most commonly dark brown except pale anterior portion of head ( Figs.10, 12 ), sometimes overall pale except darker posterior portion of head, body never reddish; with fine, silvery pubescence; clypeal notch in male small, much smaller than scape ( Fig.10 ); female with clypeus not emarginate ( Fig. 12 ).

Material Examined. Extralimital USA Records: Wyoming: 1- WYOM: Yellowstone N.P.; Utah Dorms Elk Exclosure 44.9601N; 110.6987W; 09-23 JUNE 1994 1925; D.S. Sikes ,F.I . T./ MTEC 147042 . 1- WYOMING. Yellowstone; National Park; 110°24′W 44°55N; July 27-31 1978 15 Pitfall next to dead elk / MTEC 147045 .

Montana Records: Beaverhead County: 1-MONT: Beaverhead Co. ; Bloody Dick Rd. ; 45.0259°N 113.334°W; 21MAY-06AUG2018, 2153m; JP Kole. Lindgren Funnel / MTEC 147038 . Flathead County: 1 - MONTANA: Flathead Co.; Glacier National Park; N. Fork Flathead area; 1988 Red Bench Fire; Study M.A. Ivie colr./ S. Big Prairie 3560′; old growth hard burn; T 35N. R 21W. Sec 16; 17-24 JUN 1991 / North flight; intercept trap / MTEC 147031 . 1- MONTANA: Flathead Co.; Glacier National Park; N. Fork Flathead area; 1988 Red Bench Fire; Study M.A. Ivie colr./ Quartz Ck. Trail Road; lodgepole unburned; T24 N, R20 W, Sec 7 3480’; 19-26 JUN 1991 / North flight; intercept trap / MTEC 147032 . 1- MONTANA: Flathead Co.; Glacier National Park; N. Fork Flathead area; 1988 Red Bench Fire; Study M.A. Ivie colr/ S. Lone Pine Prairie; lodgepole light burn; T35 N R21 W Sec 36 3600’; 19-26 JUN 91/ South flight intercept trap / MTEC 147040 . 1- MONTANA: Flathead Co.; Glacier National Park; N. Fork Flathead area; 1988 Red Bench Fire; Study M.A. Ivie colr/ N. Lone Pine Prairie; lodgepole light burn; T35 N R21 W Sec 36 3600’; 21-28 MAY 92/ South flight intercept trap / MTEC 147037 . 1- MONTANA: Flathead Co.; Glacier National Park; N. Fork Flathead area; 1988 Red Bench Fire; Study M.A. Ivie colr/ S. Lone Pine Prairie; lodgepole light burn; T35 N R21 W Sec 36 3600’; 21-28 MAY 1992 / Center flight intercept trap / MTEC 147033 . 1- MONTANA: Flathead Co.; Glacier National Park; N. Fork Flathead area; 1988 Red Bench Fire; Study M.A. Ivie colr/ S. Big Prairie 3560’; old growth hard burn T35 N, R21 W, Sec 16; 13-20 JUL 1993 / Lindgren; funnel trap #2/ MTEC 147034 . 1- MONTANA: Flathead Co.; Glacier National Park; N. Fork Flathead area; 1988 Red Bench Fire; Study M.A. Ivie colr/ 2miS. Polebridge R . S.; lodgepole hard burn; T34 N, R21 W, Sec 36 3680’; 20-27 MAY 1992 / South flight intercept trap / MTEC 147036 . 1- MONTANA: Flathead Co.; Glacier National Park; N. Fork Flathead area; 1988 Red Bench Fire; Study M.A. Ivie colr/ Bowman- Akokola inst.; old growth hard burn; T35 N, R21 W, Sec 15 3600’; 26MAY-18JUN 91/ MTEC 147035 . 1-MONT: Flathead Co.; Glacier Nat. Park ; N.Fork Flathead R .; 06-12 JULY 1989 ; M.A. Ivie colr/ MTEC 147044 . Gallatin County: 2 - MONTANA: Gallatin Co.; In B. centralis nest; Nest removed from home; In Bozeman 27 July 2014; C.M. Delphia, J.L. Monte / ( MTEC 147039 , MTEC 14041 ). Liberty County: 1-MONT: Liberty Co. ; Blackjack Rd. E Witlash ; 48.9186N, 111.1762W; 21 May 16 JULY 2015 1283m; C.J. Hart. LF:EtOH+/ MTEC 147043 .

Range. CANADA: Alberta, British Columbia, Saskatchewan, and Yukon. USA: Alaska, Colorado, Montana, and Wyoming.

Notes on Biology. Adults have been captured in a variety of traps including Lindgren funnels, pitfall traps, flight intercept traps, and from the nest of B. centralis . This species has been taken in Lindgren funnels from Glacier National Park containing B. bifarius , Bombus californicus Smith, 1854 , Bombus flavidus Eversmann, 1852 , Bombus insularis (Smith, 1861) , Bombus rufocinctus Cresson, 1863 , and Bombus suckleyi Greene, 1860 ; however, the association between beetles and bees in these cases can only be tangentially inferred. For more information on these records, see Table 2.

Additional Remarks. This species is very heterogeneous in terms of size and coloration. Most specimens are dark colored with the anterior portion of the head pale; however, some individuals are remarkably pale and almost uniformly so. Such pale individuals, particularly when they also happen to be large, may be confused for other species, such as A. ochraceus . To avoid such confusion, it can be helpful to focus on the head, which is always darkest posteriorly in A. suturalis , but is uniformly yellow in A. ochraceus and A. pallidivestis . The head is also approximately quadrate in A. suturalis , whereas the head of A. ochraceus and A. pallidivestis is noticeably wider than long. If the specimen is male, the very small clypeal notch ( Fig. 10 ) is a good indicator of this species, as the clypeal notches of the other yellow Antherophagus are much larger ( Figs. 2, 6 , 18 ).

Figures

Figs. 9–16. Antherophagus suturalis: 9) Male, dorsal view; 10) Male, head; 11) Female, dorsal view; 12) Female, head. A. convexulus: 13) Male, dorsal view; 14) Male, head; 15) Female, dorsal view; 16) Female, head. Scale bars = 1.0 mm.

Figs. 21–23. Montana counties with Antherophagus records. 21) A. ochraceus; 22) A. pallidivestis; 23) A. suturalis.

Figs. 1–8. Antherophagus ochraceus: 1) Male, dorsal view; 2) Male, head; 3) Female, dorsal view; 4) Female, head. A. pallidivestis: 5) Male, dorsal view; 6) Male, head; 7) Female, dorsal view; 8) Female, head. Scale bars = 1.0 mm.

Figs. 17–20. Antherophagus ruficornis. 17) Male, dorsal view; 18) Male, head; 19) Female, dorsal view;