11. The antennae are pectinate in males while in females, the antennae are serrate. 12. The inserted spirally but are twisted on lateral branchlets to appear pectinate and nearly opposite. 13. The antennae of the male are pectinate . 14. Males & females have pectinated antennaes. 15. It is the only North American species with pectinate ( comblike ) flagellomeres ( antenna segments ). 16. Pectinate muscles make up the part of the wall in front of this, the right atrial appendage.17. The tibia of the middle and hind legs sport two distinct spurs, a simple spur and a pectinate . 18. Some sources cite that the pectinate muscles are useful in increasing the power of contraction without increasing heart mass substantially. 19. Antennae of male with proximal half bi-pectinated , the distal half is simple, wholly simple in female. 20. "Oroya " species are solitary with a globular form and many ribs with usually-dense pectinate spines.
