Bolshecapnia Ricker, 1965

Murányi, Dávid, Gamboa, Maribet & Orci, Kirill Márk, 2014, Zwicknia gen. n., a new genus for the Capnia bifrons species group, with descriptions of three new species based on morphology, drumming signals and molecular genetics, and a synopsis of the West Palaearctic and Nearctic genera of Capniidae (Plecoptera), Zootaxa 3812 (1), pp. 1-82 : 15

Bolshecapnia Ricker, 1965

( Figs. 17–18 , 29 , 33 )

Capnia (Bolschecapnia) Ricker, 1965 — Ricker 1965: 478. (misspelling in the stating of the name, used as Bolshecapnia elsewhere in the original description).

Capnia (Bolshecapnia) Ricker, 1965 — Ricker 1965: 478. (original description, type species Capnia (Bolshecapnia) gregsoni Ricker, 1965 ).

Capnia Pictet, 1841 — Zwick 1973: 370. (synonymy of Capnia (Bolschecapnia) Ricker, 1965 with Capnia Pictet, 1841 ).

Bolshecapnia Ricker, 1965 — Ricker & Scudder 1975: 333. (first use as a generic name, without formal designation and removed from synonymy).

Diagnosis. Male epiproct: B-scl large, divided from Ep-scl; Lb-scl small, divided from Ep-scl; Ep-scl laterally divided in the apical part or the whole length with membranous connecting tissue, ventrally divided in the basal and apical or only in the apical section, caudal setae absent; I-scl long, divided hook or tube; Ec present. Male Pp: apical part long and narrow; Fp long and narrow, divided from Rp. Male Sg: divided from St 9 and Tg 9, vesicle present. Female Sg: pointed or rounded, narrower than St 8 but usually overhanging; lateral sclerites present. Male tergites: Tg 9 with process or process lacking. Ventral thoracic sclerites: MPrs and MeFs triangular, MeFsp separated from MePfs. Macropterous wings: forewing A1 beyond a straight or gently curved, R1 before r curved; crossveins between C and Sc one to eight, R veins three to six.

Species included. 7 valid species from the West Nearctic ( DeWalt et al. 2014); 6 of these examined (see Appendix 1).

Remarks. Despite the seemingly obvious differences among the males of the species, males share similar developed epiproct structures. An exception is B. milami ( Nebeker & Gaufin, 1967) that has much more divided Ep-scl than other members of the genus. Nevertheless, its epiproct and the entire terminalia share the other features distinctive for the genus. Lacking process on Tg 9 of the type species B. gregsoni ( Ricker, 1965) can be regarded as a secondary loss, because of the presence of a setose hump instead of a process.

Figures

FIGURES 17–22. Male terminalia of Nearctic Capniidae—17–18: Bolshecapnia gregsoni (Ricker); 19–20: Isocapnia grandis (Banks); 21–22: Eucapnopsis brevicauda (Claassen); 17, 19, 21: dorso-caudal view; 18, 20, 22: ventro-caudal view (B-scl: basal sclerite; Ec: eversible crest; Ep-scl: main epiproct sclerite (shaded in grey); I-scl: inner sclerite; Lb-scl: laterobasal sclerite; Tg 10: tergite 10)—not to scale.

FIGURES 23–31. Male paraprocts and fusion plate of Capniidae, dorso-lateral view—23: Zwicknia bifrons (Newman); 24: Capnia s.s. nigra (Pictet); 25: Capnia s.l. vidua Klapálek; 26: Capnia s.l. prolongata Zhiltzova; 27: Capnia s.l. pedestris Kimmins; 28: Capnia s.l. arensi Zhiltzova; 29: Bolshecapnia gregsoni (Ricker); 30: Isocapnia grandis (Banks); 31: Eucapnopsis brevicauda (Claassen) (Fp: fusion plate; Pp: paraproct; Rp: retractoral plate)—not to scale.

FIGURES 32–48. Male terminalia of Capniidae, ventral view—32: Zwicknia bifrons (Newman); 33: Bolshecapnia gregsoni (Ricker); 34: Eucapnopsis stigmatica transversa Aubert; 35: Isocapnia grandis (Banks); 36: Capnia s.l. arensi Zhiltzova; 37: C. s.l. prolongata; 38: C. s.l. pedestris Kimmins; 39: C. s.s. nigra (Pictet); 40: Arsapnia decepta Banks; 41: Allocapnia granulata (Claassen); 42: Mesocapnia silvatica Raušer; 43: Capnura venosa Banks; 44: Utacapnia lemoniana (Nebeker & Gaufin); 45: Paracapnia opis (Newman); 46: Nemocapnia carolina Banks; 47: Capnopsis schilleri schilleri (Rostock); 48: Capnioneura nemuroides Ris (C: cercus; Ep-scl: main epiproct sclerite; Fp: fusion plate; Pp: paraproct; Sg: subgenital plate; St 9: sternite 9; Tg 9: tergite 9; Tg 10: tergite 10; Vv: ventral vesicle)—scale 1 mm.