Millipeds of Genus Brevigonus 



55 



Fig. 6. Distribution of Brevigonus: triangles, arcuatus; dots, shelfordi. 



Range.— Western Piedmont Plateau of South Carolina, from eastern 

 Pickens and Oconee counties to central McCormick County. The genus 

 is best represented in the Savannah River Valley of McCormick, Abbe- 

 ville, and Anderson counties. 



Species. — Two. 



Brevigonus shelfordi (Loomis) 



Cleptoria shelfordi Loomis 1944:172-173, Fig. 4. Chamberlin and Hoff- 

 man 1958:28. 

 Brevigonus shelfordi Shelley 1980:35-41, Figs. 1-13. 



Diagnosis. — Distinguished by following features of male gonopods: 

 acropodites crossing in situ; prefemoral process present, cuneate; acrop- 

 odite short, terminating abruptly at distal extremity of peak, distal zone 

 and apical curve absent; with or without sharply acute spur on medial 

 face of acropodite distal to flange. 



Description. — As with the generic description, the following com- 

 ments on gonopods supplement my 1980 description and present an 

 account parallel to those of species of Sigmoria. 



Gonopods in situ with acropodites crossing at midline of aperture, 

 extending over opposite sides of aperture and projecting slightly across 



