Diamphipnopsis beschi Illies, 1960

Stark, Bill P., 2008, Diamphipnoa Colberti, A New Stonefly Species From Chile, And The Possible Female Of Diamphipnopsis Beschi Illies (Plecoptera: Diamphipnoidae), Illiesia 4 (4), pp. 55-58 : 57-58

Diamphipnopsis beschi Illies

( Figs. 7-8 )

Diamphipnopsis beschi Illies, 1960:695 . Holotype ♂ (Limnologische Flussstation, Schlitz). Pillaifa-Bergbach , Province Valdivia, Chile

Material examined. Chile: X Region, Oncol P. Boniface Way, 606 m, 39 ° 41.979’ S, 73 ° 18.938’ W, 8 January 2007, Arias et al., 1 ♀ ( University of California , Berkeley) .

Adult habitus. General color grayish black with greenish background. Head dark over central frons and much of occiput ( Fig.7 ); pronotum greenish with irregular dark markings on disk. Wing membrane pale with greenish tint and brown veins; margins with brown spots at ends of many veins. Legs greenish with scattered dark blotches.

Putative Female. Forewinglength 25 mm. Subgenital plate truncate along posterior margin with no hint of notch. Area surrounding plate membranous and without setae, but posterior margin of sternum 8 with a sparse field of fine setae ( Fig. 8 ).

Remarks. The basis for this species assignment are: 1) the subgenital plate is truncate rather than notched as shown for D. samali by Illies (1960), and 2) the forewing length is only 25 mm whereas Illies (1960) reports a range of 36-45 mm for D. samali . This specimen may still represent an atypical D. samali or an undescribed member of the genus. Additional specimens are needed to allow an evaluation of the status of this population.

Figures

Figs. 7-8. Diamphipnopsis beschi putative female. 7. Head and pronotum. 8. Female abdominal sterna 8-10.