Nemoura tripotini, Zwick, 2010

Zwick, Peter, 2010, New Species And New Records Of Plecoptera From Korea And The Russian Far East, Illiesia 6 (9), pp. 75-97 : 86

Nemoura tripotini sp. n.

(Figs. 26-31)

Material examined. ♂ holotype, 3♂ paratypes, REPUBLIC OF KOREA: Jirisan , Hamyang-gun, Macheon-Myeon, Samjeon-li, Alt. 700 m, 35°20.93'N 125°38.50'E, 27.VII.-16.VIII. 2004, Malaise trap on small stream. Jirisan, Hamyang-gun, Munsu-Sa, Songjeong-li, Alt. 400 m, 35°24.74'N 127°43.87'E, 27.VI.-27.VII. 2004, Malaise trap in forested area at sunlight , 2♂ paratypes.

Adult habitus. Structure typical of genus Nemoura , not distinctive. Brownish, no pattern. The front wing is 8.3 mm long.

Male. Apex of paraproct entire, resembling a slender tongue (Fig. 26). Cercus almost straight, plump, with large membraneous apex and prominent terminal wart (Figs. 26-28). The apical points are single and small, only the lateral one projects distinctly. Medial tooth appressed to soft surface of the apex, barely apparent (Fig. 29).

The epiproct is oval, anteriorly narrowed, with recessed tip (Fig. 30). The apical sclerite is transverse and stands erect on the wide poorly defined looped sclerite. The front of the apical sclerite is rough. The slender arched setae which normally sit beneath the apical sclerite are freely exposed anterolaterally from it (Fig. 31). The ventral sclerite is narrow and bears numerous spines.

Female. Not known.

Diagnosis. Because of the recessed epiproct tip the present species was first believed to be N. ussuriensis Zhiltzova, 1997 (in Teslenko & Zhiltzova 1997) whose dorso-apical epiproct sclerite was not described in detail. However, the illustration of the holotype shows a short and wide ventral sclerite with only six stout spines. V.A. Teslenko kindly provided microphotographs of the epiproct of an additional specimen. Nemoura ussuriensis is distinct from the present species. On the other hand, from the description N. espera Ham & Lee, 1999 is very similar to N. ussuriensis and possibly its junior synonym.

Etymology. Named for Pierre Tripotin, a French hymenopterist who collected the present interesting material and gave it to USNM, Washington D. C.