Tychus daggyi, (Park)

Chandler, Donald S. & Geromini, Sarah D., 1962, A Revision of the Eastern Nearctic GenusCustotychusPark and Wagner, 1962 (Coleoptera: Staphylinidae: Pselaphinae), The Coleopterists Bulletin 1962 (2), pp. 217-242 : 217-242

12. Metasternal tubercle in posterior view with lateral margins at apex prominent and subacute ( Fig. 17b ); genitalia in lateral view with large ventral tooth in basal portion of lateral arms of dorsal plate, apical portion of lateral arms membranous ( Fig. 3 ); District of Columbia to the Piedmont area of North Carolina and eastern Tennessee ( Fig. 33 )..... ...................................... 2. C. daggyi (Park)

12′. Metasternal tubercle in posterior view with lateral margins at apex rounded, not as prominent ( Figs. 24b , 28b ); genitalia in lateral view with basal portion of lateral arms of dorsal plate with ventral recurved tooth at apex, with distinct apical spine ( Figs. 11, 15 ) .........................................13

Figures

Figs. 16–27. Custotychus species, scanning electron micrographs right lateral (a) and posterior (b) views of metasternal tubercle. 16) C. chickasaw; 17) C. daggyi; 18) C. lobatus; 19) C. turnbowi; 20) C. rothorum; 21) C. spinosus; 22) C. verticalis; 23) C. watrousi; 24) C. carloritaorum; 25) C. leei; 26) C. minor; 27) C. natchez. Grid for measurements of 20 or 50m at bottom of micrographs.

Figs. 1–7. Custotychus species. 1) C. natchez, dorsal habitus; 2–7) Aedeagus, dorsal and left lateral views:

Fig. 33. Distribution of Custotychus species in the daggyi species-group: C. chickasaw, C. daggyi, C. lobatus, and C. turnbowi.

Figs. 28–32. Custotychus species. 28) C. pocahontas, scanning electron micrographs of right lateral (a) and posterior (b) views of metasternal tubercle. Grid for measurements of 20 or 50m at bottom of micrographs; 29) C. carloritaorum, mesotibial spurs; 30) C. spinosus, mesotibial spurs; 31) C. watrousi, abdominal ventrites, ventrolateral view; 32) C. daggyi, right maxillary palpus, ventral view. Scale bar = 0.1 mm.

Figs. 8–15. Custotychus species, dorsal and left lateral view of aedeagus. 8) C. cavei; 9) C. verticalis; 10) C. watrousi;