Custotychus rothorum, 1962

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

2′. Mesotibiae lacking spur at middle, smooth ................. 5. C. rothorum Chandler and Geromini , new species

3. Second visible abdominal ventrite slightly concave to flat in medial third ( Fig. 31 ) .... 4

3′. Second visible abdominal ventrite evenly convex across middle.................................8

4. Metasternal tubercle broadly T-shaped at

apex, width of apex as long as tubercle itself

( Fig. 16b ); Arkansas ( Fig. 33 ).....................

.................. 1. C. chickasaw Chandler and

Geromini, new species

4′. Metasternal tubercle indistinctly to narrowly T-shaped at apex, 1/2 or less tubercle length ( Figs. 17b, 25b ), rarely taken in Arkansas .............................................................. 5

5. Aedeagus with median lobe clearly longer

than lateral arms of dorsal plate, in lateral

view with lateral arms bearing ventral thick

recurved spine at apices ( Fig. 12 ); Ohio to

Alabama and Texas ( Fig. 36 ) ......................

Figures

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. 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.

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

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

Figs. 34–36. Distribution of Custotychus species. 34) Distribution of species in the spinosus and verticalis species-groups: C. rothorum and C. spinosus, and C. cavei, C. verticalis, and C. watrousi; 35) Distribution of C. minor; 36) Distribution of other species in the minor species-group: C. carloritaorum, C. leei, C. natchez, and C. pocahontas.