Custotychus cavei, 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

7′. In lateral view lateral arms straight, simple ( Fig. 8 ); Alabama ( Fig. 34 ) ......................... ........ 7. C. cavei Chandler and Geromini , new species

8. Metasternal tubercle broad and widely T-shaped, stem width greater than length ( Figs. 18b, 19b ); genitalia with long, membranous lobes extending from lateral arms of dorsal plate, lobes ventrally angular at middle in lateral view as angulate tooth or rounded lobe ( Figs. 4–5 ) [ C. daggyi also with this genitalic form]............................9

8′. Metasternal tubercle apex variably expanded to form “T”, stem clearly longer than wide ( Figs. 17b, 24b, 26b, 27b )......................... 10

Figures

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.

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: