Septima's Clubtail - Gomphus (Gomphurus) septima (Westfall, 1956)

This is a species of concern. Please report any encounters to Odonata Central.

Range & Habitat:

A disjunct subspecies (G. s. delawarensis) found from NJ into PA and NY along the Delaware. Until recently, only known in New Jersey from exuviae collected along the upper river.


Flight Season:
Early Date: 24 May
Late Date: 25 June

Flight season charts created from records in the official database maintained by Allen Barlow.

Male Oblique - Photo by Harry Legrand
Click on a thumbnail to view full-size photo

A rather large clubtail with a moderate club. The thorax has wide U-shaped yellow stripes. The anterior lateral thoracic stripe is usually incomplete. A series or yellow streaks down the dorsal abdomen, but the dorsal surface of the club is usually black except for a tiny yellow basal spot that may be present on S8.


Conservation Status:
State: S1 Critically imperiled in NJ
Global: G2 Imperiled globally, very vulnerable to extinction