Trogoderma yunnaeunsis

Prena, Jens, 2005, Linogeraeus tonsilis, The Coleopterists Bulletin 59 (2), pp. 157-165 : 157-165

Key to Distinguish T. yunnaeunsis from Eastern Palearctic Species of Trogoderma

1. Integument light to dark brown without clearly-defined light maculae in elytra and without defined pattern of transverse bands formed by pale setae, although illdefined light areas usually present. Male antenna with 9, 10, or 11 segments and club of 4 or fewer segments - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - T. granarium

— Integument dark brown to black with bands on elytron present and formed by lightcolored maculae or by pale setae. Male antenna with 11 segments and club of 5 or more segments - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 2

2. Elytral integument immaculate (humerus and apex may be somewhat lighter in color) and with distinct pattern of bands formed by pale setae of elytron - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - T. glabrum , T. longisetosum

— Elytral integument with distinct pale bands and often longitudinal lines, these more or less matched by pale-colored setae - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 3

3. Elytron with basal band (basal part of the loop) reduced and often missing, subbasal band pronounced and crescent-shaped, submedian and subapical bands often reduced to single spots; if submedian and subapical bands strongly expressed, no longitudinal lines present, or rarely admedian line extending basad from submedian band but not attaining subbasal band; sutural line rarely present connecting submedian and subapical bands. Male / antenna with segments placed symmetrically on pedicels; segment 3 less than 2 3 as wide as segment 4 - - - - - - - - - - - - - - - - T. variabile

— Elytral bands present and distinct; basal band and subbasal bands together forming loop with basal half about as strongly expressed as subbasal half; longitudinal lines present or not. Male antenna with segments placed symmetrically or not; segment 3 subequal in width to segment 4 if segments symmetrical on pedicels - - - - - - - - - - - - - - 4

4. No longitudinal lines present in elytral integument - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - T. varium , T. mongolicum ; T. teukton

— Lines clearly present either connecting submedian band with loop or subbasal band with submedian band. - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 5

5. Submedian band of elytron not extending more than ½ distance from median suture to lateral margin. Segments of male antenna placed excentrically on pedicels - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - T. anthrenoides

— Submedian band of elytron extending from suture to margin or nearly so. Segments of male antenna placed nearly symmetrically on pedicels - - - - - - - - - - - T. yunnaeunsis