Pictetiella expansa (Banks)

Verdone, Chris J. & Kondratieff, Boris C., 2016, Description Of The Male Terminalia Of Two Western Nearctic Perlodinae (Pictetiella Expansa (Banks) And Salmoperla Sylvanica Baumann & Lauck), Illiesia 12 (1), pp. 1-9 : 2

Pictetiella expansa (Banks)

( Figs. 1-11 )

Perla expansa Banks (1920:317 .)

Perla expansa: Needham and Claassen , (1925:81., 313., 325.) [♂ possibly incorrectly associated? ( Ricker, 1952:120., Baumann, 1973:97.)]

Perla expansa: Claassen , (1931:55.) [nymph incorrectly associated ( Ricker, 1952:120., Baumann, 1973:98.)] Isogenus (Pictetia) expansus: Ricker , (1952:120.) Pictetiella expansella: Illies , (1966:375.)

Isogenus (Pictetia) expansus: Gaufin et al. , (1966:62.) Isogenus (Pictetia) expanus [sic]: Gaufin et al., (1972:110.)

Pictetiella expansa: Baumann , (1973:98.)

Pictetiella expansa: Baumann et al. , (1977:22., 115.)

Material Examined. COLORADO: Boulder Co., North Fork Middle Boulder Creek, 4 th of July Rd. below 4 th of July Campground , 39.99194°N, 105.63226°W, 29 Aug. 2015, C. Verdone, D. Fuller & M. Diesenroth, 18♂, 7♀ ( CSUC) .

Description: Male. For a habitus description refer to Baumann (1973). Head and pronotum shown in ( Fig. 1 ). Hemitergal lobes (HL) rounded produced inward, apices with long fine hairs, bearing sparse sensilla basiconica anteriorly ( Figs. 2, 3 ). Epiproct cowl densely clothed with short bristle-like setae ( Figs. 2, 3 ) and flanked by inward pointed fingerlike paragenital plates (PP) ( Figs. 2, 3 ). Epiproct sclerotized process bifurcate in lateral aspect ( Fig. 2 ). Sclerotized process singular, widest at base from dorsal aspect ( Figs. 3, 4 ). Fully everted epiproct directed forward. Epiproct long, narrow and widest just before apex ( Figs. 3-7 ). Anterior ⅔ of epiproct covered in backward directed shingled scale-like setae, which appear translucent ( Fig. 8 ). Scale-like setae transition into bristle-like setae near apex ( Fig. 9 ). Apex of sclerotized process narrow with flared blunt tip ( Figs. 9, 10 ). Lateral stylets absent. Aedeagus completely membranous, bearing only a few sparse hairs and two small posterolateral lobes ( Fig. 11 ).

Figures

Fig. 1. Head and pronotum dorsal, Pictetiella expansa ♂, Boulder Co., Colorado, North Fork Middle Boulder Creek, 29 Aug. 2015.

Figs. 2-4. Pictetiella expansa ♂, Boulder Co., Colorado, North Fork Middle Boulder Creek, 29 Aug. 2015. 2. Epiproct lateral, epiproct cowl (EC), hemitergal lobes (HL), paragenital plates (PP). 3. Epiproct dorsal, epiproct cowl (EC), paragenital plates (PP). 4. Epiproct dorsal.

Figs. 5-10. Pictetiella expansa ♂, Boulder Co., Colorado, North Fork Middle Boulder Creek, 29 Aug. 2015. 5. Epiproct dorsal. 6. Epiproct anterior. 7. Epiproct apex lateral. 8. Epiproct, scale-like setae. 9. Epiproct, bristle-like hairs. 10. Epiproct tip.

Fig. 11. Aedeagus lateral, Pictetiella expansa ♂, Boulder Co., Colorado, North Fork Middle Boulder Creek, 29 Aug. 2015.