Oxystigma

Garrison, Rosser W., 2014, Review of Oxystigma Selys with the synonymy of Oxystigma williamsoni Geijskes (Odonata: Heteragrionidae), Zootaxa 3780 (2), pp. 347-364: 350

publication ID

http://dx.doi.org/10.11646/zootaxa.3780.2.7

publication LSID

lsid:zoobank.org:pub:72C52670-4454-46D3-8D71-9BC8E8A98434

persistent identifier

http://treatment.plazi.org/id/7734CE70-4841-FF8D-FF57-89C5FA161696

treatment provided by

Plazi

scientific name

Oxystigma
status

 

Key to females of Oxystigma 

Specimens may need to be relaxed and subsequently dried with the prothorax pushed anteriorly from the synthorax in order to examine the intersternite and setifer.

1. Dorsal tip of setifer ending in the form of a club, extending only a little beyond dorsal margin of intersternite ( Fig. 26 View Figure ); irregular rounded sclerite above intersternite absent or poorly developed; Sierra de Lema region, Bolívar State, Venezuela ( Fig. 58 View Figure ) caerulans 

1 '. Dorsal tip of setifer digitiform ( Figs. 31–34 View Figure ) to acute ( Figs. 27–30 View Figure ), extending well beyond dorsal margin of intersternite; with an irregular rounded sclerite above intersternite that may be partially hidden by dorsal arm of setifer; widespread in northern and central South America ( Fig. 58 View Figure )....................................................................... 2

2 (1 '). Dorsal tip of setifer forming an acute process abruptly curving anteriorly away from margin of mesepisternum ( Figs. 27–30 View Figure )............................................................................................. cyanofrons 

2. Dorsal tip of setifer forming a linear digitiform process, not abruptly curving anteriorly from mesepisternum ( Figs.25, 31– 34 View Figure )............................................................................................ petiolatum