Okanagrion, Archibald & Cannings & Erickson & Bybee & Mathewes, 2021

Archibald, Bruce, Cannings, Robert A., Erickson, Robert J., Bybee, Seth M. & Mathewes, Rolf W., 2021, The Cephalozygoptera, a new, extinct suborder of Odonata with new taxa from the early Eocene Okanagan Highlands, western North America, Zootaxa 4934 (1), pp. 1-133 : 75

Okanagrion incertae sedis

Figs. 42–43 .

Material. SR 11-60-17AB ( Fig. 42 ), collected at Republic A0307 by Karl Volkman, 15.vii.2006, housed in the Stonerose Interpretive Center collections; SR 94-05-30 ( Fig. 43 ), collected at Republic A0307 B by Wes Wehr, 31.x.1994 and SR 11-51-07AB ( Fig. 43 ) collected at Republic B 4131 by Dennis Vickerman, 22.viii.2008, both in the Stonerose Interpretive Center collections; SR 06-08-18 ( Fig. 42 ), collected at Republic B 4131 by Don Volkman, 4.vi.2004, in the Stonerose Interpretive Center collections; UWBM-74307 ( Fig. 42 ), collected at Republic A0307 B by Wesley Wehr , 1993, in the Burke Museum collections; RBCM P1550, three wing portions ( Fig. 43 ) collected by John Leahy at the McAbee Hoodoo Face beds, unknown date, in the Royal British Columbia Museum collections .

Discussion. SR 11-60-17: The dense crossvenation and colouration indicates that this specimen belongs to one of the infuscate Okanagrion species. SR 94-05-30 and SR 11-51-07: these two apical-anterior wing fragments could belong to any Okanagrion species that are infuscate in this region, although SR 94-05-30 does not belong to O. lochmum by its crossvenation in the RA–RP1 space. SR 06-08-18: colouration indicates that this specimen belongs to one of the infuscate Okanagrion species; the light fascia, although poorly preserved, suggests O. threadgillae . UWBM-74307: the infuscation does not reach the nodus as in some Okanagrion species, and IR2 originating on RP1-2 restricts it within these to O. beardi , O. dorrellae , and O. angustum . Many crossveins are closer together than in any of these, however. RBCM P1550 belongs to an infuscate species, although this is preserved too poorly to clarify which one; IR2 originates rather evenly between RP1-2 and RP3-4, ruling out O. beardi ; and it is neither O. dorrellae nor O. augustum by shape. It likely either belongs to O. hobani or to O. lochmum ; the CuA–A space five or six cells wide is consistent with these.

Figures

FIGURE 42. Okanagrion incertae sedis. SR 11-60-17. A, photograph; B, drawing; SR 06-08-18: C, photograph; D, drawing; UWBM-74307: E, photograph; F, drawing. All to scale, 5 mm.

FIGURE 43. Okanagrion incertae sedis. SR 94-05-30: A, photograph; B, drawing; SR 11-51-07: C, photograph; D, drawing; RBCM P1550: E, photograph of top wing in G; F, drawing of wing in E; G, all three wings. A–D to scale; E, F to scale; G to scale; all scales 5 mm.