Perlomyia iwate, Sivec & Stark, 2012

Sivec, Ignac & Stark, Bill P., 2012, Seven New Species Of Perlomyia (Plecoptera: Leuctridae) From Japan, Illiesia 8 (7), pp. 94-103 : 98-99

publication ID	https://doi.org/ 10.5281/zenodo.4760796
DOI	https://doi.org/10.5281/zenodo.4763640
persistent identifier	https://treatment.plazi.org/id/80643417-FFC0-FF8A-FEC7-F9E3FA32624D
treatment provided by	Felipe
scientific name	Perlomyia iwate
status	sp. nov.

Treatment

Perlomyia iwate View in CoL sp. n.

( Figs. 12-15 View Figs )

Material examined. Holotype ♂, Japan, Iwate Prefecture, Hienuki River, Oinokubo Riverside Park , 12 km above Hayachine Dam, 4 May 2002, C.D. Kerst ( PMSL) . Paratypes: 4♂, 3♀; 3 May 2002, same locality ; 2♂, 7♀, 4 May 2002, same locality ( PMSL) .

Male. Forewing length 6 mm. General color dark brown to black. Epiproct curved slightly forward in lateral aspect, long, slender and pointed or slightly rounded at tip ( Fig. 14 View Figs ). Tergum 9 narrowed posteromesally; tergum 10 with a pair of small mesolateral knobs ( Fig. 12 View Figs ). Cerci apically rounded in dorsal aspect, broad, more or less trapezoidal in lateral aspect and without apical spine. Paraprocts fused into a broad, thick process, angulate near midlength and tapered to a narrow apex in lateral aspect ( Fig. 14 View Figs ). Sternum 9 curved upward in lateral aspect and broadly triangular in apical half in ventral aspect and extending beyond base of paraprocts. Vesicle broadly rounded at apex, much wider apically than at base ( Fig. 13 View Figs ).

Female. Forewing length 7 mm. Posterior margin of sternum 7 straight, but slightly swollen ( Fig. 15 View Figs ). Sternum 8 bearing a conspicuous pair of large dark median sclerites, narrowly separated on meson; lateral wing-like sclerites directed posterolaterally, wider at apex than at base.

Larva. Unknown.

Etymology. The species name, used as a noun in apposition, is based on the type locality in Iwate Prefecture.

Diagnosis. Among the four species of Japanese Perlomyia which share small knobs on tergum 10 (see P. honshu above) only P. parva and P. iwate lack an expanded apex to the epiproct. In P. parva the epiproct apex is acute and the cerci bear a small apical spine, whereas in P. iwate the epiproct apex is narrowly rounded and the cerci lack the apical spine.